fix(backup): 加固 CDC 仓库恢复安全

fix(cluster): 绑定 Agent 中转产物到备份记录
refactor(ui): 统一 SVG 图标组件
2026-08-26 10:41:19 +08:00 · 2026-08-07 20:55:09 +08:00 · 2026-08-07 20:54:57 +08:00 · 2026-08-07 05:56:20 +08:00 · 2026-08-07 05:55:56 +08:00 · 2026-08-07 05:54:34 +08:00
218 changed files with 20766 additions and 1916 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
  pull_request:
    branches: [main, master]

+# 最小权限：构建/测试仅需读取仓库内容，显式声明以收敛默认的可写令牌。
+permissions:
+  contents: read
+
 jobs:
  backend:
    name: Go Build & Test
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -110,13 +110,21 @@ jobs:
          cp -r web/dist "${ARCHIVE_NAME}/web"
          cp server/config.example.yaml "${ARCHIVE_NAME}/"
          cp deploy/install.sh "${ARCHIVE_NAME}/" 2>/dev/null || true
+          # v2.2+: 随发布包提供 Grafana dashboard 与 nginx.conf 模板
+          if [ -d deploy/grafana ]; then
+            cp -r deploy/grafana "${ARCHIVE_NAME}/grafana"
+          fi
+          cp deploy/nginx.conf "${ARCHIVE_NAME}/nginx.conf" 2>/dev/null || true
          tar czf "${ARCHIVE_NAME}.tar.gz" "${ARCHIVE_NAME}"
+          cp "${ARCHIVE_NAME}.tar.gz" "backupx-${{ matrix.goos }}-${{ matrix.goarch }}.tar.gz"

      - name: Upload to GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ env.VERSION }}
-          files: backupx-${{ env.VERSION }}-${{ matrix.goos }}-${{ matrix.goarch }}.tar.gz
+          files: |
+            backupx-${{ env.VERSION }}-${{ matrix.goos }}-${{ matrix.goarch }}.tar.gz
+            backupx-${{ matrix.goos }}-${{ matrix.goarch }}.tar.gz
          generate_release_notes: true

  # ─── Job 3: Docker 多架构 → Docker Hub ───
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -0,0 +1,106 @@
+# Contributing to BackupX
+
+感谢你对 BackupX 的关注！本指南介绍如何搭建开发环境并提交贡献。
+Thanks for your interest in contributing to BackupX! This guide covers how to set up your environment and submit changes.
+
+## 开发环境 / Development Setup
+
+### 依赖 / Prerequisites
+
+- **Go** 1.25+（见 `server/go.mod`）
+- **Node.js** 20+（CI 与 Docker 使用 Node 20）
+- **npm** 9+
+
+### 快速开始 / Quick Start
+
+分别在两个终端启动前后端（后端 :8340，前端 Vite HMR）：
+
+```bash
+git clone https://github.com/Awuqing/BackupX.git && cd BackupX
+
+# 终端 1 —— 后端（默认 http://localhost:8340）
+make dev-server
+
+# 终端 2 —— 前端（Vite 热更新，/api 代理到 8340）
+make dev-web
+```
+
+### 构建 / Building
+
+```bash
+make build          # 同时构建后端与前端
+make build-server   # 仅后端 → server/bin/backupx
+make build-web      # 仅前端 → web/dist
+make docker         # 构建 Docker 镜像
+make docker-cn      # 国内镜像源加速构建
+```
+
+> 后端会自动托管 `web/dist`（或 `server.web_root` 指定目录），因此本地裸机部署无需额外的反向代理即可访问控制台。
+
+## 测试 / Testing
+
+提交前请确保测试通过：
+
+```bash
+make test           # 后端 + 前端全部测试
+make test-server    # 仅后端：cd server && go test ./...
+make test-web       # 仅前端：cd web && npm run test（vitest）
+```
+
+新增功能或修复缺陷时，请尽量补充对应测试。
+
+## 提交信息规范 / Commit Messages
+
+本项目采用 **Conventional Commits**，正文用中文撰写：
+
+```
+<type>(<scope>): <subject>
+
+<body>
+```
+
+| type | 说明 |
+|------|------|
+| `feat` | 新功能 |
+| `fix` | 缺陷修复 |
+| `docs` | 文档变更 |
+| `style` | 不影响逻辑的格式调整 |
+| `refactor` | 重构 |
+| `perf` | 性能优化 |
+| `test` | 测试相关 |
+| `chore` | 构建/依赖/工具链 |
+
+示例：
+
+```
+feat(storage): 新增 Wasabi S3 后端支持
+fix(cluster): 修复跨节点恢复的终态处理
+docs: 补充 CONTRIBUTING 指南
+```
+
+## Pull Request 流程
+
+1. **Fork** 仓库并从最新的 `main` 切出特性分支；
+2. **开发**功能或修复，必要时补充测试；
+3. **自测**：确保 `make test` 通过；
+4. **提交**：使用上述 Conventional Commits（中文）；
+5. **推送**并对着 `main` 发起 PR。
+
+### PR 描述建议
+
+- 清晰说明本 PR 做了什么；
+- 对新功能/修复，补充动机与背景；
+- 关联相关 Issue（如 `Closes #62`）；
+- 纯文档 PR 可不附测试。
+
+> 请保持分支基于较新的 `main`：基线过旧的分支容易产生大范围冲突，难以评审与合入。
+
+## 编码规范 / Coding Conventions
+
+- **Go**：所有错误必须处理（禁止 `_ = err`），日志使用项目已有库（`zap`），禁止 `fmt.Println`；提交前执行 `gofmt`。
+- **前端**：遵循项目 ESLint/Prettier/tsconfig 配置，不擅自引入新的 CSS 框架或 UI 库。
+- **包管理**：`web/` 使用 npm，请提交对应的 `package-lock.json`。
+
+## License
+
+向 BackupX 贡献即表示你同意你的贡献以 [Apache License 2.0](LICENSE) 授权。
--- a/README.md
+++ b/README.md
@@ -46,6 +46,9 @@
 | **Multi-Node Cluster** | Master-Agent mode via HTTP long-polling — Agents run tasks locally, upload straight to storage, no reverse connectivity required |
 | **Security** | JWT + bcrypt + AES-256-GCM encrypted config + optional backup encryption + full audit log |
 | **Notifications** | Email / Webhook / Telegram on success or failure |
+| **Observability** | Prometheus `/metrics` endpoint + `/health` + `/ready` probes + SLA breach gauge |
+| **Audit Webhook** | HMAC-SHA256 signed forwarding to SIEM / WORM storage for compliance (SOC2 / GDPR) |
+| **Flow Control** | Per-node bandwidth cap + per-node concurrency limit — tune big/small nodes independently |
 | **Deployment** | Single binary + embedded SQLite, Docker one-click, zero external dependencies |

 ## Quick Start
@@ -57,9 +60,15 @@ docker run -d --name backupx -p 8340:8340 -v backupx-data:/app/data awuqing/back
 # Or prebuilt archive
 curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-linux-amd64.tar.gz
 tar xzf backupx-*.tar.gz && cd backupx-* && sudo ./install.sh
+
+# Or build and install on bare metal without Docker
+git clone https://github.com/Awuqing/BackupX.git && cd BackupX
+make build && sudo ./deploy/install.sh
 ```

-Open `http://your-server:8340`, create the admin account, then follow the [5-minute Quick Start](https://awuqing.github.io/BackupX/docs/getting-started/quick-start).
+For ARM64 hosts, use `backupx-linux-arm64.tar.gz`. The archive contains `backupx`, `web/`, `config.example.yaml`, and `install.sh`; run `install.sh` from the extracted directory.
+
+Open `http://your-server:8340`, choose English or Chinese on the setup screen, create the first administrator account, then follow the [5-minute Quick Start](https://awuqing.github.io/BackupX/docs/getting-started/quick-start).

 ## Documentation

@@ -89,6 +98,16 @@ See the [development guide](https://awuqing.github.io/BackupX/docs/development/s

 Issues and pull requests welcome. Please read the [contributing guide](https://awuqing.github.io/BackupX/docs/development/contributing) before opening a PR — commit messages and PRs on this project are written in Chinese.

+## Star History
+
+<a href="https://www.star-history.com/?repos=Awuqing%2FBackupX&type=date&legend=top-left">
+ <picture>
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=Awuqing/BackupX&type=date&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=Awuqing/BackupX&type=date&legend=top-left" />
+   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=Awuqing/BackupX&type=date&legend=top-left" />
+ </picture>
+</a>
+
 ## License

 [Apache License 2.0](LICENSE)
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -46,6 +46,9 @@
 | **多节点集群** | Master-Agent 模式，基于 HTTP 长轮询跨多台服务器管理备份。Agent 本地执行任务并直接上传到存储，无需反向连通性 |
 | **安全** | JWT + bcrypt + AES-256-GCM 加密配置 + 可选备份文件加密 + 完整审计日志 |
 | **通知** | 邮件 / Webhook / Telegram，备份成功或失败时自动推送 |
+| **可观测性** | Prometheus `/metrics` 端点 + `/health` + `/ready` 探针 + SLA 违约监控 |
+| **审计外输** | HMAC-SHA256 签名 Webhook，对接 SIEM / WORM 存储满足 SOC2 / GDPR 合规 |
+| **流控** | 节点级带宽限速 + 节点级并发控制，大小节点分别配置，避免小内存 Agent 被挤爆 |
 | **部署** | 单二进制 + 内嵌 SQLite，Docker 一键启动，零外部依赖 |

 ## 快速开始
@@ -57,9 +60,15 @@ docker run -d --name backupx -p 8340:8340 -v backupx-data:/app/data awuqing/back
 # 或使用预编译包
 curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-linux-amd64.tar.gz
 tar xzf backupx-*.tar.gz && cd backupx-* && sudo ./install.sh
+
+# 或从源码构建并裸机安装（无需 Docker）
+git clone https://github.com/Awuqing/BackupX.git && cd BackupX
+make build && sudo ./deploy/install.sh
 ```

-打开 `http://your-server:8340`，创建管理员账户，按 [5 分钟快速开始](https://awuqing.github.io/BackupX/zh-Hans/docs/getting-started/quick-start) 完成首次备份。
+ARM64 主机请下载 `backupx-linux-arm64.tar.gz`。预编译包内包含 `backupx`、`web/`、`config.example.yaml` 和 `install.sh`，请在解压后的目录内执行 `install.sh`。
+
+打开 `http://your-server:8340`，在初始化页选择中文或 English 并创建首个管理员账户，按 [5 分钟快速开始](https://awuqing.github.io/BackupX/zh-Hans/docs/getting-started/quick-start) 完成首次备份。

 ## 文档

--- a/deploy/docker/entrypoint.sh
+++ b/deploy/docker/entrypoint.sh
@@ -1,6 +1,10 @@
 #!/bin/sh
 set -e

+if [ "${1:-}" = "agent" ]; then
+    exec /app/bin/backupx "$@"
+fi
+
 # Backend listens on internal port 8341, Nginx exposes 8340
 export BACKUPX_SERVER_PORT="${BACKUPX_SERVER_PORT_INTERNAL:-8341}"

--- a/deploy/docker/nginx.conf
+++ b/deploy/docker/nginx.conf
@@ -19,6 +19,25 @@ server {
        proxy_read_timeout 3600s;
    }

+    # Agent one-click install endpoints.
+    # Some external reverse proxies strip the /api prefix before reaching this
+    # container, so /install/ must be proxied here instead of falling through to
+    # the SPA index.html.
+    location /install/ {
+        proxy_pass http://127.0.0.1:8341/install/;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_buffering off;
+        proxy_cache off;
+    }
+
+    location = /health { proxy_pass http://127.0.0.1:8341/health; }
+    location = /ready { proxy_pass http://127.0.0.1:8341/ready; }
+    location = /metrics { proxy_pass http://127.0.0.1:8341/metrics; }
+
    # SPA fallback
    location / {
        try_files $uri $uri/ /index.html;
--- a/deploy/grafana/README.md
+++ b/deploy/grafana/README.md
@@ -0,0 +1,34 @@
+# BackupX Grafana Dashboard
+
+对接 BackupX v2.1+ 暴露的 Prometheus `/metrics` 端点。
+
+## 导入步骤
+
+1. 在 Grafana 配置 Prometheus 数据源指向你的 Prometheus（例如 `http://prometheus:9090`）
+2. 在 Prometheus 配置抓取 BackupX：
+
+```yaml
+scrape_configs:
+  - job_name: 'backupx'
+    scrape_interval: 30s
+    static_configs:
+      - targets: ['backupx-master:8340']
+```
+
+3. Grafana → Dashboards → Import → 上传 `backupx-dashboard.json` → 选 Prometheus 数据源 → Import
+
+## 面板内容
+
+- 当前运行任务数 / SLA 违约数 / 在线节点 / 24h 成功率 / 应用版本
+- 任务执行速率（按 success/failed 堆叠）
+- 任务耗时 P50/P95/P99（按任务类型）
+- 任务产出字节速率
+- 存储目标用量 TopN 柱状图
+- 节点在线状态表（红/绿标色）
+- 验证 / 恢复 / 复制的成功率时间线
+
+## 自定义建议
+
+- 将 `backupx_sla_breach_tasks > 0` 配为 AlertManager 告警
+- `sum(backupx_node_online) < N` 触发集群容量告警（N 为你集群的最少节点数）
+- P99 任务耗时突变可用于发现慢任务和资源压力
--- a/deploy/grafana/backupx-dashboard.json
+++ b/deploy/grafana/backupx-dashboard.json
@@ -0,0 +1,193 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {"type": "grafana", "uid": "-- Grafana --"},
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "description": "BackupX v2.1+ 核心指标面板。对接 /metrics 端点，抓取周期建议 30s（与服务端 Gauge collector 同步）。",
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [
+    {
+      "title": "BackupX 文档",
+      "url": "https://awuqing.github.io/BackupX/",
+      "type": "link",
+      "targetBlank": true
+    }
+  ],
+  "liveNow": false,
+  "panels": [
+    {
+      "type": "stat",
+      "title": "正在运行的任务",
+      "gridPos": {"h": 4, "w": 4, "x": 0, "y": 0},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "backupx_task_running", "refId": "A"}],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "thresholds": {"mode": "absolute", "steps": [{"color": "green", "value": null}, {"color": "yellow", "value": 5}]}
+        }
+      },
+      "options": {"colorMode": "value", "graphMode": "area", "textMode": "auto"}
+    },
+    {
+      "type": "stat",
+      "title": "SLA 违约任务数",
+      "gridPos": {"h": 4, "w": 4, "x": 4, "y": 0},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "backupx_sla_breach_tasks", "refId": "A"}],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "thresholds": {"mode": "absolute", "steps": [{"color": "green", "value": null}, {"color": "red", "value": 1}]}
+        }
+      }
+    },
+    {
+      "type": "stat",
+      "title": "在线节点",
+      "gridPos": {"h": 4, "w": 4, "x": 8, "y": 0},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "sum(backupx_node_online)", "refId": "A"}],
+      "fieldConfig": {
+        "defaults": {"unit": "short", "color": {"mode": "thresholds"}, "thresholds": {"steps": [{"color": "red", "value": null}, {"color": "green", "value": 1}]}}
+      }
+    },
+    {
+      "type": "stat",
+      "title": "24h 任务成功率",
+      "gridPos": {"h": 4, "w": 6, "x": 12, "y": 0},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{
+        "expr": "sum(rate(backupx_task_run_total{status=\"success\"}[24h])) / sum(rate(backupx_task_run_total[24h])) * 100",
+        "refId": "A"
+      }],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "percent", "decimals": 2,
+          "thresholds": {"mode": "absolute", "steps": [{"color": "red", "value": null}, {"color": "yellow", "value": 95}, {"color": "green", "value": 99}]}
+        }
+      }
+    },
+    {
+      "type": "stat",
+      "title": "应用版本",
+      "gridPos": {"h": 4, "w": 6, "x": 18, "y": 0},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "backupx_app_info", "refId": "A", "format": "table", "instant": true}],
+      "options": {"textMode": "value_and_name", "reduceOptions": {"calcs": ["last"], "fields": "/^version$/"}}
+    },
+    {
+      "type": "timeseries",
+      "title": "任务执行速率（按状态）",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 4},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{
+        "expr": "sum by (status) (rate(backupx_task_run_total[5m]))",
+        "refId": "A",
+        "legendFormat": "{{status}}"
+      }],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {"drawStyle": "line", "lineInterpolation": "smooth", "fillOpacity": 10, "stacking": {"mode": "normal"}}
+        },
+        "overrides": [
+          {"matcher": {"id": "byName", "options": "success"}, "properties": [{"id": "color", "value": {"mode": "fixed", "fixedColor": "green"}}]},
+          {"matcher": {"id": "byName", "options": "failed"}, "properties": [{"id": "color", "value": {"mode": "fixed", "fixedColor": "red"}}]}
+        ]
+      }
+    },
+    {
+      "type": "timeseries",
+      "title": "任务耗时 P50 / P95 / P99",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 4},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [
+        {"expr": "histogram_quantile(0.50, sum(rate(backupx_task_run_duration_seconds_bucket[10m])) by (le, task_type))", "refId": "A", "legendFormat": "P50 {{task_type}}"},
+        {"expr": "histogram_quantile(0.95, sum(rate(backupx_task_run_duration_seconds_bucket[10m])) by (le, task_type))", "refId": "B", "legendFormat": "P95 {{task_type}}"},
+        {"expr": "histogram_quantile(0.99, sum(rate(backupx_task_run_duration_seconds_bucket[10m])) by (le, task_type))", "refId": "C", "legendFormat": "P99 {{task_type}}"}
+      ],
+      "fieldConfig": {"defaults": {"unit": "s"}}
+    },
+    {
+      "type": "timeseries",
+      "title": "任务产出字节速率",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 12},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "sum by (task_type) (rate(backupx_task_bytes_total[5m]))", "refId": "A", "legendFormat": "{{task_type}}"}],
+      "fieldConfig": {"defaults": {"unit": "Bps"}}
+    },
+    {
+      "type": "bargauge",
+      "title": "存储目标用量 TopN",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 12},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "topk(10, backupx_storage_used_bytes)", "refId": "A", "legendFormat": "{{target_name}} ({{target_type}})"}],
+      "fieldConfig": {"defaults": {"unit": "bytes"}},
+      "options": {"orientation": "horizontal", "displayMode": "gradient"}
+    },
+    {
+      "type": "table",
+      "title": "节点在线状态",
+      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 20},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [{"expr": "backupx_node_online", "refId": "A", "format": "table", "instant": true}],
+      "transformations": [
+        {"id": "organize", "options": {"excludeByName": {"Time": true, "__name__": true, "job": true, "instance": true}, "indexByName": {"node_name": 0, "role": 1, "Value": 2}, "renameByName": {"Value": "online"}}}
+      ],
+      "fieldConfig": {
+        "overrides": [{
+          "matcher": {"id": "byName", "options": "online"},
+          "properties": [{"id": "mappings", "value": [{"type": "value", "options": {"0": {"text": "离线", "color": "red"}, "1": {"text": "在线", "color": "green"}}}]}]
+        }]
+      }
+    },
+    {
+      "type": "timeseries",
+      "title": "验证 / 恢复 / 复制成功率",
+      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 20},
+      "datasource": {"type": "prometheus", "uid": "${DS_PROMETHEUS}"},
+      "targets": [
+        {"expr": "sum by (status) (rate(backupx_verify_run_total[15m]))", "refId": "A", "legendFormat": "verify {{status}}"},
+        {"expr": "sum by (status) (rate(backupx_restore_run_total[15m]))", "refId": "B", "legendFormat": "restore {{status}}"},
+        {"expr": "sum by (status) (rate(backupx_replication_run_total[15m]))", "refId": "C", "legendFormat": "replication {{status}}"}
+      ],
+      "fieldConfig": {"defaults": {"unit": "ops"}}
+    }
+  ],
+  "refresh": "30s",
+  "schemaVersion": 39,
+  "tags": ["backupx", "backup", "sre"],
+  "templating": {
+    "list": [
+      {
+        "current": {"selected": false, "text": "Prometheus", "value": "Prometheus"},
+        "label": "Datasource",
+        "name": "DS_PROMETHEUS",
+        "query": "prometheus",
+        "refresh": 1,
+        "regex": "",
+        "type": "datasource"
+      }
+    ]
+  },
+  "time": {"from": "now-6h", "to": "now"},
+  "timepicker": {},
+  "timezone": "",
+  "title": "BackupX Overview",
+  "uid": "backupx-overview",
+  "version": 1,
+  "weekStart": ""
+}
--- a/deploy/install.sh
+++ b/deploy/install.sh
@@ -1,17 +1,31 @@
 #!/bin/sh
 set -eu

-PROJECT_ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+PROJECT_ROOT=$(CDPATH= cd -- "$SCRIPT_DIR/.." && pwd)
 PREFIX="${PREFIX:-/opt/backupx}"
 ETC_DIR="${ETC_DIR:-/etc/backupx}"
 SERVICE_NAME="backupx"
 APP_USER="backupx"
 APP_GROUP="backupx"
-BIN_SOURCE="${BIN_SOURCE:-$PROJECT_ROOT/server/backupx}"
-WEB_SOURCE="${WEB_SOURCE:-$PROJECT_ROOT/web/dist}"
-CONFIG_TEMPLATE="${CONFIG_TEMPLATE:-$PROJECT_ROOT/server/config.example.yaml}"
+if [ -f "$SCRIPT_DIR/backupx" ] && [ -d "$SCRIPT_DIR/web" ]; then
+    BIN_SOURCE="${BIN_SOURCE:-$SCRIPT_DIR/backupx}"
+    WEB_SOURCE="${WEB_SOURCE:-$SCRIPT_DIR/web}"
+    CONFIG_TEMPLATE="${CONFIG_TEMPLATE:-$SCRIPT_DIR/config.example.yaml}"
+    NGINX_SOURCE="${NGINX_SOURCE:-$SCRIPT_DIR/nginx.conf}"
+else
+    SOURCE_BIN_DEFAULT="$PROJECT_ROOT/server/bin/backupx"
+    # Keep compatibility with contributors who built the historical path by
+    # hand, while matching the canonical `make build` output first.
+    if [ ! -f "$SOURCE_BIN_DEFAULT" ] && [ -f "$PROJECT_ROOT/server/backupx" ]; then
+        SOURCE_BIN_DEFAULT="$PROJECT_ROOT/server/backupx"
+    fi
+    BIN_SOURCE="${BIN_SOURCE:-$SOURCE_BIN_DEFAULT}"
+    WEB_SOURCE="${WEB_SOURCE:-$PROJECT_ROOT/web/dist}"
+    CONFIG_TEMPLATE="${CONFIG_TEMPLATE:-$PROJECT_ROOT/server/config.example.yaml}"
+    NGINX_SOURCE="${NGINX_SOURCE:-$PROJECT_ROOT/deploy/nginx.conf}"
+fi
 SERVICE_SOURCE="${SERVICE_SOURCE:-$PROJECT_ROOT/deploy/backupx.service}"
-NGINX_SOURCE="${NGINX_SOURCE:-$PROJECT_ROOT/deploy/nginx.conf}"

 if [ "$(id -u)" -ne 0 ]; then
    echo "请使用 root 或 sudo 执行安装脚本。" >&2
@@ -19,14 +33,22 @@ if [ "$(id -u)" -ne 0 ]; then
 fi

 if [ ! -f "$BIN_SOURCE" ]; then
-    echo "未找到后端二进制：$BIN_SOURCE" >&2
-    echo "请先执行：cd \"$PROJECT_ROOT/server\" && go build -o backupx ./cmd/backupx" >&2
+    echo "Backend binary not found / 未找到后端二进制：$BIN_SOURCE" >&2
+    echo "源码树安装请先在仓库根目录执行 make build（产物：server/bin/backupx）。" >&2
+    echo "For a source install, run 'make build' in the repository root first." >&2
+    echo "发布包安装请确认当前目录包含 ./backupx、./web 和 ./install.sh。" >&2
    exit 1
 fi

 if [ ! -d "$WEB_SOURCE" ]; then
    echo "未找到前端构建产物：$WEB_SOURCE" >&2
-    echo "请先执行：cd \"$PROJECT_ROOT/web\" && npm run build" >&2
+    echo "源码树安装请先执行：cd \"$PROJECT_ROOT/web\" && npm run build" >&2
+    echo "发布包安装请确认当前目录包含 ./web。" >&2
+    exit 1
+fi
+
+if [ ! -f "$CONFIG_TEMPLATE" ]; then
+    echo "未找到配置模板：$CONFIG_TEMPLATE" >&2
    exit 1
 fi

@@ -44,14 +66,75 @@ cp -R "$WEB_SOURCE/." "$PREFIX/web/"
 chown -R "$APP_USER:$APP_GROUP" "$PREFIX"

 if [ ! -f "$ETC_DIR/config.yaml" ]; then
-    install -m 0640 "$CONFIG_TEMPLATE" "$ETC_DIR/config.yaml"
+    install -o "$APP_USER" -g "$APP_GROUP" -m 0640 "$CONFIG_TEMPLATE" "$ETC_DIR/config.yaml"
 fi
+# 确保服务账户能读取配置：历史版本曾以 root:root 0640 安装配置，
+# 导致以 backupx 身份运行的服务因无权读取配置而启动失败（exit 1）。
+chown "$APP_USER:$APP_GROUP" "$ETC_DIR/config.yaml"

-install -m 0644 "$SERVICE_SOURCE" "/etc/systemd/system/$SERVICE_NAME.service"
+if [ -f "$SERVICE_SOURCE" ]; then
+    install -m 0644 "$SERVICE_SOURCE" "/etc/systemd/system/$SERVICE_NAME.service"
+else
+    cat > "/etc/systemd/system/$SERVICE_NAME.service" <<UNIT
+[Unit]
+Description=BackupX API Service
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=$APP_USER
+Group=$APP_GROUP
+WorkingDirectory=$PREFIX
+ExecStart=$PREFIX/bin/backupx -config $ETC_DIR/config.yaml
+Restart=on-failure
+RestartSec=5
+NoNewPrivileges=true
+LimitNOFILE=65535
+
+[Install]
+WantedBy=multi-user.target
+UNIT
+fi
 systemctl daemon-reload
 systemctl enable --now "$SERVICE_NAME"

-if [ -d "/etc/nginx/conf.d" ]; then
+# systemctl may return before the process has opened its HTTP listener. Verify
+# the same unauthenticated endpoint used by the first-administrator screen so a
+# broken bare-metal install cannot print a false success message.
+HEALTH_URL="${HEALTH_URL:-http://127.0.0.1:8340/api/auth/setup/status}"
+READY=0
+ATTEMPT=1
+while [ "$ATTEMPT" -le 30 ]; do
+    if systemctl is-active --quiet "$SERVICE_NAME"; then
+        if command -v curl >/dev/null 2>&1; then
+            if curl -fsS --max-time 2 "$HEALTH_URL" >/dev/null 2>&1; then
+                READY=1
+                break
+            fi
+        elif command -v wget >/dev/null 2>&1; then
+            if wget -q -T 2 -O /dev/null "$HEALTH_URL"; then
+                READY=1
+                break
+            fi
+        else
+            echo "Warning / 警告：未找到 curl 或 wget，仅验证 systemd 服务状态。" >&2
+            READY=1
+            break
+        fi
+    fi
+    ATTEMPT=$((ATTEMPT + 1))
+    sleep 1
+done
+
+if [ "$READY" -ne 1 ]; then
+    echo "BackupX did not become ready at $HEALTH_URL / 服务未通过就绪检查。" >&2
+    systemctl status "$SERVICE_NAME" --no-pager >&2 || true
+    journalctl -u "$SERVICE_NAME" -n 50 --no-pager >&2 || true
+    exit 1
+fi
+
+if [ -d "/etc/nginx/conf.d" ] && [ -f "$NGINX_SOURCE" ]; then
    install -m 0644 "$NGINX_SOURCE" "/etc/nginx/conf.d/$SERVICE_NAME.conf"
    if command -v nginx >/dev/null 2>&1; then
        nginx -t
@@ -67,6 +150,19 @@ cat <<MESSAGE
 - 配置文件：$ETC_DIR/config.yaml
 - systemd 服务：/etc/systemd/system/$SERVICE_NAME.service

+Web 控制台已由后端直接托管，无需额外的 nginx 反向代理即可访问：
+  http://<本机IP>:8340
+
+首次访问 / First sign-in:
+  1. 打开上面的地址，并可在登录页右上角选择 中文 或 English。
+  2. 页面显示“系统初始化 / System setup”时，创建首个管理员用户名和密码。
+  3. 如果未显示初始化表单，请先检查：$HEALTH_URL
+
+（如已安装 nginx，脚本会自动写入反向代理配置，可继续用 80 端口访问。）
+
+排查：若服务未监听端口，请查看日志：
+  journalctl -u "$SERVICE_NAME" -n 50 --no-pager
+
 如需修改监听地址、数据库路径或日志级别，请编辑 "$ETC_DIR/config.yaml" 后执行：
  systemctl restart "$SERVICE_NAME"
 MESSAGE
--- a/deploy/nginx.conf
+++ b/deploy/nginx.conf
@@ -18,6 +18,22 @@ server {
        proxy_read_timeout 3600s;
    }

+    # Agent 一键安装脚本路径（兼容 v2.0 及之前生成的命令）。
+    # v2.1+ 新生成的命令走 /api/install/... 自动命中上面的 /api/ 代理。
+    location /install/ {
+        proxy_pass http://127.0.0.1:8340/install/;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # 健康检查端点同样不走 SPA fallback。
+    location = /health { proxy_pass http://127.0.0.1:8340/health; }
+    location = /ready  { proxy_pass http://127.0.0.1:8340/ready; }
+    location = /metrics { proxy_pass http://127.0.0.1:8340/metrics; }
+
    location / {
        try_files $uri $uri/ /index.html;
    }
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -22,6 +22,8 @@ services:
      # - /home/user/data:/mnt/data:ro
    environment:
      - TZ=Asia/Shanghai
+      # 远程 Agent 需要通过公网或可路由地址连接 Master 时，取消注释并改成真实 URL：
+      # - BACKUPX_SERVER_EXTERNAL_URL=https://backup.example.com
      # 通过 BACKUPX_ 前缀环境变量覆盖配置：
      # - BACKUPX_LOG_LEVEL=debug
      # - BACKUPX_BACKUP_MAX_CONCURRENT=4
--- a/docs-site/docs/deployment/bare-metal.md
+++ b/docs-site/docs/deployment/bare-metal.md
@@ -10,20 +10,34 @@ description: systemd + Nginx deployment from the prebuilt release tarball or sou

 ```bash
 # Download the matching tarball
-curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-v1.6.0-linux-amd64.tar.gz
+curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-linux-amd64.tar.gz

 # Extract and install
-tar xzf backupx-v*-linux-amd64.tar.gz && cd backupx-*
+tar xzf backupx-linux-amd64.tar.gz && cd backupx-*-linux-amd64
 sudo ./install.sh
 ```

 The installer performs these steps automatically:

 1. Creates a system user `backupx`
-2. Copies the binary to `/opt/backupx/`
-3. Generates a default `config.yaml` with safe JWT/encryption secrets
+2. Copies the binary to `/opt/backupx/bin/backupx` and the web console to `/opt/backupx/web`
+3. Installs the default configuration at `/etc/backupx/config.yaml`
 4. Installs `backupx.service` (systemd), enabled at boot
 5. (Optional) installs an Nginx site file — see [Nginx Reverse Proxy](./nginx)
+6. Verifies the first-setup API before reporting success
+
+For multi-node clusters, edit `/etc/backupx/config.yaml` after installation and set the Master URL that remote Agents can reach:
+
+```yaml
+server:
+  external_url: "https://backup.example.com"
+```
+
+Restart BackupX after changing it:
+
+```bash
+sudo systemctl restart backupx
+```

 ## From source

@@ -50,11 +64,13 @@ After=network.target
 [Service]
 Type=simple
 User=backupx
+Group=backupx
 WorkingDirectory=/opt/backupx
-ExecStart=/opt/backupx/backupx --config /opt/backupx/config.yaml
+ExecStart=/opt/backupx/bin/backupx -config /etc/backupx/config.yaml
 Restart=on-failure
-RestartSec=5s
-LimitNOFILE=65536
+RestartSec=5
+NoNewPrivileges=true
+LimitNOFILE=65535

 [Install]
 WantedBy=multi-user.target
@@ -66,17 +82,20 @@ Typical operations:
 sudo systemctl status backupx
 sudo journalctl -u backupx -f    # live logs
 sudo systemctl restart backupx
+curl -fsS http://127.0.0.1:8340/api/auth/setup/status
 ```

+Open `http://your-server:8340`, switch to English if desired, and create the first administrator on the **System setup** screen. For a custom listen port, run the installer with a matching `HEALTH_URL`.
+
 ## Password reset

 If the admin password is lost:

 ```bash
-/opt/backupx/backupx reset-password \
+/opt/backupx/bin/backupx reset-password \
  --username admin \
  --password 'newpass123' \
-  --config /opt/backupx/config.yaml
+  --config /etc/backupx/config.yaml
 ```

 Docker equivalent:
--- a/docs-site/docs/deployment/configuration.md
+++ b/docs-site/docs/deployment/configuration.md
@@ -15,13 +15,14 @@ server:
  host: "0.0.0.0"             # BACKUPX_SERVER_HOST
  port: 8340                  # BACKUPX_SERVER_PORT
  mode: "release"             # release | debug
+  external_url: ""            # BACKUPX_SERVER_EXTERNAL_URL — public Master URL for Agent install scripts

 database:
  path: "./data/backupx.db"   # BACKUPX_DATABASE_PATH — embedded SQLite

 security:
  jwt_secret: ""              # BACKUPX_SECURITY_JWT_SECRET — auto-generated if empty
-  jwt_expires_in: "24h"
+  jwt_expire: "24h"           # BACKUPX_SECURITY_JWT_EXPIRE
  encryption_key: ""          # AES-256-GCM key for storage config encryption

 backup:
@@ -46,7 +47,20 @@ The environment wins when both file and env are set. All dot-paths become unders
 | Config key | Env variable |
 |------------|--------------|
 | `server.port` | `BACKUPX_SERVER_PORT` |
+| `server.external_url` | `BACKUPX_SERVER_EXTERNAL_URL` |
+| `security.jwt_expire` | `BACKUPX_SECURITY_JWT_EXPIRE` |
 | `log.level` | `BACKUPX_LOG_LEVEL` |
 | `backup.max_concurrent` | `BACKUPX_BACKUP_MAX_CONCURRENT` |
 | `backup.temp_dir` | `BACKUPX_BACKUP_TEMP_DIR` |
 | `backup.bandwidth_limit` | `BACKUPX_BACKUP_BANDWIDTH_LIMIT` |
+
+## Master external URL
+
+Set `server.external_url` when BackupX is behind Docker, Nginx, a load balancer, or any reverse proxy whose internal Host is not reachable by remote Agents:
+
+```yaml
+server:
+  external_url: "https://backup.example.com"
+```
+
+This value is used when BackupX renders one-click Agent install scripts and docker-compose snippets. It must be reachable from every Agent host. Leave it empty only when `X-Forwarded-Proto` / `X-Forwarded-Host` are reliable and point to the same URL that Agents can access.
--- a/docs-site/docs/deployment/docker.md
+++ b/docs-site/docs/deployment/docker.md
@@ -25,6 +25,8 @@ services:
      - /etc/nginx:/mnt/nginx-conf:ro
    environment:
      - TZ=Asia/Shanghai
+      # Required when remote Agents must connect through a public or routed URL:
+      # - BACKUPX_SERVER_EXTERNAL_URL=https://backup.example.com
      - BACKUPX_LOG_LEVEL=info
      - BACKUPX_BACKUP_MAX_CONCURRENT=2

@@ -42,6 +44,17 @@ docker compose up -d

 To back up files from the host, mount them into the container. When creating a file-type task in the web UI, point the source path at the mount location (e.g. `/mnt/www`). Make sure the directory is visible inside the container.

+## Multi-node clusters
+
+When deploying Agents on other machines, set `BACKUPX_SERVER_EXTERNAL_URL` on the Master container to the URL that those Agents can reach:
+
+```yaml
+environment:
+  - BACKUPX_SERVER_EXTERNAL_URL=https://backup.example.com
+```
+
+Use an HTTPS URL if Agents cross untrusted networks. The generated one-click install scripts and docker-compose snippets use this value as `BACKUPX_AGENT_MASTER`.
+
 ## Environment variables

 All configuration keys can be overridden with the `BACKUPX_` prefix:
--- a/docs-site/docs/features/backup-types.md
+++ b/docs-site/docs/features/backup-types.md
@@ -8,14 +8,26 @@ description: File, MySQL, PostgreSQL, SQLite and SAP HANA — what they back up

 BackupX supports five built-in backup types. Type determines which runner executes the job.

+When a task is routed to a remote Agent, the source tools and paths are resolved on that Agent host. Multi-target uploads are still tracked per storage target; if at least one target succeeds, the backup record is marked successful and the per-target result table shows partial failures.
+
 ## File / Directory

-Tars (and optionally gzips) one or more filesystem paths.
+File tasks offer three backup modes:
+
+- **Full archive** — writes a self-contained tar artifact on every run
+- **Differential archive** — writes only changes since the current full baseline and periodically refreshes that baseline
+- **CDC repository** — splits content with stable 512 KiB / 1 MiB / 4 MiB boundaries, stores new chunks in immutable 32 MiB packs, and writes a small snapshot manifest for each run
+
+The CDC repository deduplicates identical content across files and snapshots. Restore, selective restore, verification, download-as-tar, retention, and garbage collection all resolve data through the repository index. Compression and encryption are applied per chunk; encrypted repositories use keyed chunk IDs so plaintext hashes are not exposed.
+
+Repository mode currently uses a single-writer index and therefore runs on the Master only. To keep repository copies on multiple backends, select multiple primary storage targets on the task. Object-level replication is intentionally disabled because a snapshot manifest without its shared packs and indexes is not a complete backup.
+
+Common file-task options:

 - **Source** accepts multiple paths — one per line in the UI
 - **Exclude patterns** accept gitignore-style globs
 - Supports following symlinks, preserving permissions
- Output is a single `.tar` or `.tar.gz` artifact
+- Full and differential modes output `.tar`, `.tar.gz`, or `.tar.zst` artifacts

 ## MySQL

--- a/docs-site/docs/features/multi-node.md
+++ b/docs-site/docs/features/multi-node.md
@@ -26,23 +26,53 @@ BackupX supports Master-Agent mode: backup tasks can be routed to specific nodes
 - **Execution** — Agent reuses the same BackupRunner (file / mysql / postgresql / sqlite / saphana) and uploads directly to storage
 - **Security** — Each node has its own token; the Agent never holds the Master's JWT secret or AES-256 key

+## Centralize backups from servers B/C/D into storage M
+
+Use the Master as the control plane and register every source server as an Agent. A task's **Source server** determines where paths and database tools are resolved; its **Storage targets** determine where the resulting artifact is retained.
+
+BackupX chooses the data path per target:
+
+| Destination | Data path |
+| --- | --- |
+| S3, WebDAV, FTP, cloud drive, or another network backend | Agent streams directly to the destination |
+| `local_disk` with **Relay remote backups through Master** enabled (for example storage server M mounted through NFS) | Agent streams through the authenticated Master API; Master writes to its configured local path |
+
+The relay is streaming: the Master does not create a second temporary copy of the entire artifact. The reverse path is used when restoring a Master-local artifact back to its source Agent. Use HTTPS whenever Agent traffic crosses an untrusted network.
+
+To configure the common `A → {B,C,D} → M` topology:
+
+1. Run BackupX Master on A and mount M on A if M is exposed as NFS or another filesystem.
+2. Create a `local_disk` target for that mount and keep **Relay remote backups through Master** enabled, or create an S3/WebDAV target exposed by M. Existing local-disk targets keep their prior Agent-local behavior until this switch is enabled.
+3. Install one Agent on B, C, and D from **Node Management**.
+4. Create a backup task for each source, choose B/C/D under **Source server**, browse that server's paths, and select M as the storage target. A source-server pool label can route identical tasks dynamically.
+5. Verify the per-target result in the backup record. For a Master-local target, the record reports transfer mode `master_relay`; network backends remain `direct`.
+
 ## Walkthrough

+### 0. Set the Master URL for production clusters
+
+Before generating Agent install commands, make sure the Master URL shown to Agents is stable and reachable from every target host.
+
+If BackupX runs behind Docker, Nginx, a load balancer, or an outer reverse proxy, configure `server.external_url` or `BACKUPX_SERVER_EXTERNAL_URL` on the Master:
+
+```yaml title="config.yaml"
+server:
+  external_url: "https://backup.example.com"
+```
+
+This URL is baked into systemd units, foreground commands, and docker-compose snippets. If it is wrong, Agents will install successfully but stay offline because they keep polling an internal or browser-only address.
+
 ### 1. Open the install wizard

 In the Web Console → **Node Management** → **Add Node**. You'll see a three-step wizard.

 - **Step 1 — Node info.** Give the node a name, or switch to batch mode and paste multiple names (one per line, max 50).
 - **Step 2 — Deploy options.** Pick install mode (`systemd` recommended, `docker`, or `foreground` for debugging), architecture (auto-detect by default), agent version (defaults to the master's version), TTL for the install link (5 min / 15 min / 1 h / 24 h), and download source (`github` direct, or the `ghproxy` mirror for mainland China).
- **Step 3 — Copy the command.** A single `curl ... | sudo sh` line is shown with a live countdown. Click copy, paste into the target machine, and run with root privileges.
+- **Step 3 — Copy the command.** A one-line install command is shown with a live countdown. Click copy, paste into the target machine, and run with root privileges. The default command embeds the rendered installer, so the target host does not need to fetch `/api/install/:token` through your reverse proxy. The public install URL is still available as a fallback.

 ### 2. One-line install on the target host

-Example (systemd mode):
-
-```bash
-curl -fsSL https://master.example.com/install/Xk3p9...vM | sudo sh
-```
+Use the command generated by the Web Console. It writes the installer to a temporary file, validates the `BACKUPX_AGENT_INSTALL_V1` marker, then runs it with root privileges.

 The script runs automatically and:

@@ -53,6 +83,10 @@ The script runs automatically and:
 5. Runs `systemctl enable --now backupx-agent`
 6. Polls `/api/v1/agent/self` until the master confirms `status: online` (up to 30 s)

+Docker mode uses the same `BACKUPX_AGENT_MASTER`, `BACKUPX_AGENT_TOKEN`, and `BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp` environment contract. After starting the container, the installer also probes `/api/v1/agent/self`; if the node does not come online, it prints `docker ps` and `docker logs --tail=100 backupx-agent` diagnostics before exiting non-zero.
+
+If you choose the URL-based fallback command and `curl` prints HTML or the shell reports `Syntax error: newline unexpected`, the install URL is being served by the web console instead of the backend. Ensure either `/api/install/` or `/install/` is forwarded to the BackupX backend, or use the embedded command generated by the console.
+
 Reruns are idempotent — to upgrade or re-provision, simply generate a new install command and run it again. The one-time install link expires after its TTL or after first consumption, whichever is sooner.

 ### 3. Rotate agent tokens at any time
@@ -65,14 +99,20 @@ In Step 1 choose "Batch" and paste node names (one per line, max 50). Step 3 sho

 ### 5. Route a task to the node

-In the **Backup Tasks** page, pick the target node when creating the task. When the task runs:
+In the **Backup Tasks** page, pick the source server when creating the task. When the task runs:

 - Local (`nodeId=0`) → Master executes in-process
 - Remote node → Master enqueues the command → Agent claims → Agent runs locally → uploads → reports back

+The node table shows the Agent health and command queue state: pending/dispatched depth, running long commands, timeouts, oldest active command age, and the latest Agent-side error. The same queue depth, running-command, and timeout snapshots are exported as Prometheus metrics:
+
+- `backupx_agent_command_queue_depth`
+- `backupx_agent_command_running`
+- `backupx_agent_command_timeout_total`
+
 ## Known limitations

- **Encrypted backups don't work via Agent** — the Agent doesn't hold Master's AES-256 key. Tasks with `encrypt: true` will fail if routed to an Agent
+- **Encrypted backups are Master-only** — the Agent doesn't hold Master's AES-256 key. Creating or updating a task with `encrypt: true` and a remote node or node pool is rejected up front
 - **Directory browser timeout** — remote dir listing is a synchronous RPC through the queue (15s default)
 - **Dispatched command timeout** — claimed-but-unfinished commands are marked `timeout` after 10 minutes

--- a/docs-site/docs/features/storage-backends.md
+++ b/docs-site/docs/features/storage-backends.md
@@ -19,7 +19,9 @@ BackupX aims to accept any place you'd want to drop a backup file.
 | **Google Drive** | Client ID/Secret + OAuth authorization |
 | **WebDAV** | URL + username/password |
 | **FTP / FTPS** | Host + port + username/password |
-| **Local disk** | Target directory (absolute path) |
+| **Local disk** | Target directory (absolute path) + optional Master relay for remote Agents |
+
+New local-disk targets enable **Relay remote backups through Master** by default. This makes the configured path belong to the Master, so a storage server mounted there can collect backups from many source Agents. Turn the switch off when the path intentionally belongs to each Agent. Existing targets retain their previous Agent-local behavior until explicitly changed.

 ## Rclone backends

--- a/docs-site/docs/getting-started/installation.md
+++ b/docs-site/docs/getting-started/installation.md
@@ -55,10 +55,11 @@ sudo ./install.sh        # creates system user, installs to /opt/backupx, sets u
 The installer:

 1. Creates a `backupx` system user
-2. Installs binary to `/opt/backupx/backupx`
-3. Creates `/opt/backupx/config.yaml` with safe defaults
+2. Installs the binary to `/opt/backupx/bin/backupx` and the web console to `/opt/backupx/web`
+3. Creates `/etc/backupx/config.yaml` with safe defaults
 4. Installs and enables the `backupx.service` systemd unit
 5. (Optional) Configures an Nginx reverse proxy
+6. Waits for `/api/auth/setup/status`; if startup fails, prints systemd diagnostics and exits non-zero

 ## From source

@@ -67,16 +68,17 @@ Requires Go ≥ 1.25 and Node.js ≥ 20.
 ```bash
 git clone https://github.com/Awuqing/BackupX.git && cd BackupX
 make build
-# or, for builds behind the great firewall
-make docker-cn
+sudo ./deploy/install.sh
 ```

 After `make build`, the binary is at `server/bin/backupx` and the built web UI is at `web/dist/`.
+The installer consumes those exact paths, so no Docker runtime is required. If an existing configuration uses a non-default port, set `HEALTH_URL` for the readiness check, for example `sudo HEALTH_URL=http://127.0.0.1:9000/api/auth/setup/status ./deploy/install.sh`.

 ## Verify the install

 ```bash
-backupx --version           # e.g. v1.6.0
+/opt/backupx/bin/backupx --version
+curl -fsS http://127.0.0.1:8340/api/auth/setup/status
 ```

-Then open `http://your-server:8340` to see the initial admin setup screen.
+Then open `http://your-server:8340`. Choose **English** or **中文** in the upper-right corner. A fresh database shows **System setup**, where you create the first administrator username and password. If that form does not appear, retry the status request above before attempting to sign in.
--- a/docs-site/docs/getting-started/quick-start.md
+++ b/docs-site/docs/getting-started/quick-start.md
@@ -42,6 +42,8 @@ Go to **Backup Tasks → New**. Three steps:
 2. **Source** — paths for file backup (multi-source supported), or connection info for databases
 3. **Storage & policy** — pick target(s), compression, retention days, encryption on/off

+For Agent-routed tasks, encryption must stay off because the Agent never receives the Master's encryption key. BackupX rejects remote-node or node-pool tasks with encryption enabled during create/update.
+
 Save, then click **Run Now** to trigger a test. Live logs stream on the **Backup Records** page.

 :::note
--- a/docs-site/docusaurus.config.ts
+++ b/docs-site/docusaurus.config.ts
@@ -6,7 +6,7 @@ import type * as Preset from '@docusaurus/preset-classic';
 // https://awuqing.github.io/BackupX/
 const config: Config = {
  title: 'BackupX',
-  tagline: 'Self-hosted server backup management — one binary, one command',
+  tagline: 'Self-hosted backup orchestration for servers, databases, storage targets and remote agents',
  favicon: 'img/favicon.ico',

  future: {
@@ -76,6 +76,16 @@ const config: Config = {
          label: 'Downloads',
          position: 'left',
        },
+        {
+          to: '/community',
+          label: 'Community',
+          position: 'left',
+        },
+        {
+          to: '/sponsors',
+          label: 'Sponsors',
+          position: 'left',
+        },
        {
          type: 'localeDropdown',
          position: 'right',
@@ -115,6 +125,22 @@ const config: Config = {
            {label: 'Issues', href: 'https://github.com/Awuqing/BackupX/issues'},
          ],
        },
+        {
+          title: 'Community',
+          items: [
+            {label: 'Contributors', href: 'https://github.com/Awuqing/BackupX/graphs/contributors'},
+            {label: 'Pull Requests', href: 'https://github.com/Awuqing/BackupX/pulls'},
+            {label: 'Sponsor', to: '/sponsors'},
+          ],
+        },
+        {
+          title: 'Sponsors',
+          items: [
+            {label: 'Sponsor BackupX', href: 'https://github.com/sponsors/Awuqing'},
+            {label: 'Partnership', href: 'https://github.com/Awuqing/BackupX/issues/new/choose'},
+            {label: 'Sponsor tiers', to: '/sponsors'},
+          ],
+        },
      ],
      copyright: `Copyright © ${new Date().getFullYear()} BackupX · Apache License 2.0`,
    },
--- a/docs-site/i18n/zh-CN/code.json
+++ b/docs-site/i18n/zh-CN/code.json
@@ -1,22 +1,22 @@
 {
  "home.badge": {
-    "message": "开源 · v1.6.0",
+    "message": "开源备份控制平面 · v2.2.1",
    "description": "Version badge on the hero"
  },
  "home.title.part1": {
-    "message": "为每一台服务器提供",
+    "message": "面向自托管服务器的",
    "description": "Hero title, first line"
  },
  "home.title.part2": {
-    "message": "自托管备份管理。",
+    "message": "备份编排平台。",
    "description": "Hero title accent second line"
  },
  "home.tagline": {
-    "message": "一个二进制，一条命令。文件 / 数据库 / SAP HANA 备份直送 70+ 存储后端。",
+    "message": "在一个清爽控制台中管理文件、数据库、SAP HANA 和远程节点备份。控制平面自己掌握，存储后端灵活选择。",
    "description": "Tagline on the home page"
  },
  "home.pageTitle": {
-    "message": "自托管备份管理",
+    "message": "面向自托管服务器的备份编排",
    "description": "Page <title> element on the home page"
  },
  "home.getStarted": {
@@ -28,13 +28,26 @@
    "description": "Hero metric label: storage backends"
  },
  "home.metric.backupTypes": {
-    "message": "备份类型",
+    "message": "远程执行",
    "description": "Hero metric label: backup types"
  },
  "home.metric.license": {
    "message": "开源协议",
    "description": "Hero metric label: license"
  },
+  "home.visual.eyebrow": {"message": "BackupX 控制台"},
+  "home.visual.title": {"message": "运维概览"},
+  "home.visual.status": {"message": "健康"},
+  "home.visual.success": {"message": "成功率"},
+  "home.visual.nodes": {"message": "活跃节点"},
+  "home.visual.targets": {"message": "存储目标"},
+  "home.visual.row1.title": {"message": "PostgreSQL 夜间备份"},
+  "home.visual.row1.desc": {"message": "加密归档已上传至 S3"},
+  "home.visual.row2.title": {"message": "SAP HANA 快照"},
+  "home.visual.row2.desc": {"message": "正在 agent-shanghai-02 上运行"},
+  "home.visual.row3.title": {"message": "保留策略清理"},
+  "home.visual.row3.desc": {"message": "下一次执行在 4 小时后"},
+  "home.command.title": {"message": "使用 Docker 启动"},

  "section.features.tag": {
    "message": "核心能力",
@@ -78,5 +91,70 @@
  "showcase.storage.desc": {"message": "阿里云 OSS、腾讯云 COS、S3、Google Drive、WebDAV — 加上每一种 rclone 后端。测试连接、收藏、查看实时容量。"},
  "showcase.nodes.title": {"message": "几分钟搭起 Master-Agent"},
  "showcase.nodes.desc": {"message": "创建节点、复制令牌、在任意远程主机启动 Agent。路由到节点的任务在本地执行并直接上传到存储 — 无需反向连通性。"},
-  "showcase.cta": {"message": "开始阅读文档"}
+  "showcase.cta": {"message": "开始阅读文档"},
+
+  "community.tag": {"message": "社区"},
+  "community.pageTitle": {"message": "社区、赞助商与贡献者"},
+  "community.pageDescription": {"message": "赞助 BackupX，了解贡献者，并找到务实的参与方式。"},
+  "community.title": {"message": "开放协作，面向长期运维"},
+  "community.subtitle": {"message": "备份软件的信任来自透明发布、真实部署反馈，以及足够务实的贡献路径。"},
+  "community.sponsor.kicker": {"message": "赞助商"},
+  "community.sponsor.wallTitle": {"message": "赞助商"},
+  "community.sponsor.title": {"message": "支持你依赖的备份基础设施"},
+  "community.sponsor.cta": {"message": "赞助 BackupX"},
+  "community.sponsor.openSlot": {"message": "赞助席位开放"},
+  "community.sponsor.logo.project": {"message": "项目赞助"},
+  "community.sponsor.logo.cloud": {"message": "云服务伙伴"},
+  "community.sponsor.logo.object": {"message": "对象存储"},
+  "community.sponsor.logo.cdn": {"message": "CDN 伙伴"},
+  "community.sponsor.logo.database": {"message": "数据库伙伴"},
+  "community.sponsor.logo.security": {"message": "安全审计"},
+  "community.sponsor.logo.agent": {"message": "远程节点实验室"},
+  "community.sponsor.logo.docs": {"message": "文档赞助"},
+  "community.sponsor.logo.release": {"message": "发布赞助"},
+  "community.sponsor.logo.s3": {"message": "S3 兼容"},
+  "community.sponsor.logo.webdav": {"message": "WebDAV 伙伴"},
+  "community.sponsor.logo.sftp": {"message": "SFTP 伙伴"},
+  "community.sponsor.logo.docker": {"message": "容器伙伴"},
+  "community.sponsor.logo.mirror": {"message": "镜像伙伴"},
+  "community.sponsor.logo.restore": {"message": "恢复演练"},
+  "community.sponsor.logo.qa": {"message": "测试实验室"},
+  "community.sponsor.logo.oss": {"message": "开源支持"},
+  "community.sponsor.logo.open": {"message": "赞助席位开放"},
+  "community.sponsor.infrastructure.label": {"message": "基础设施"},
+  "community.sponsor.infrastructure.title": {"message": "云与存储生态伙伴"},
+  "community.sponsor.infrastructure.desc": {"message": "帮助 BackupX 覆盖对象存储、WebDAV、SFTP 以及区域云平台的真实验证。"},
+  "community.sponsor.security.label": {"message": "安全"},
+  "community.sponsor.security.title": {"message": "审计与可靠性支持者"},
+  "community.sponsor.security.desc": {"message": "支持加密、恢复演练、发布签名和运维检查等强化工作。"},
+  "community.sponsor.community.label": {"message": "社区"},
+  "community.sponsor.community.title": {"message": "开源支持者"},
+  "community.sponsor.community.desc": {"message": "支持文档、示例、平台测试和贡献者引导。"},
+  "community.sponsor.tier.backer.name": {"message": "Backer"},
+  "community.sponsor.tier.backer.amount": {"message": "适合个人与小团队"},
+  "community.sponsor.tier.backer.desc": {"message": "支持文档、Issue 分流、兼容性测试和小型体验改进。"},
+  "community.sponsor.tier.partner.name": {"message": "Partner"},
+  "community.sponsor.tier.partner.amount": {"message": "适合存储与基础设施厂商"},
+  "community.sponsor.tier.partner.desc": {"message": "支持 Provider 验证、部署示例、基准说明和集成指南。"},
+  "community.sponsor.tier.enterprise.name": {"message": "Enterprise"},
+  "community.sponsor.tier.enterprise.amount": {"message": "适合生产环境使用方"},
+  "community.sponsor.tier.enterprise.desc": {"message": "赞助恢复演练、发布加固、审计和长期维护等可靠性工作。"},
+  "community.contributor.kicker": {"message": "贡献者"},
+  "community.contributor.all": {"message": "查看全部"},
+  "community.contributor.source": {"message": "浏览器端通过 GitHub contributors API 获取。"},
+  "community.contributor.botRole": {"message": "自动化贡献者"},
+  "community.contributor.githubRole": {"message": "GitHub 贡献者"},
+  "community.contributor.contributions": {"message": "{count} 次贡献"},
+  "community.path.kicker": {"message": "贡献路径"},
+  "community.path.issues.title": {"message": "反馈生产问题"},
+  "community.path.issues.desc": {"message": "提交日志、部署拓扑和恢复预期。"},
+  "community.path.docs.title": {"message": "完善文档与示例"},
+  "community.path.docs.desc": {"message": "贡献存储、Agent 和数据库部署指南。"},
+  "community.path.code.title": {"message": "提交聚焦的 PR"},
+  "community.path.code.desc": {"message": "保持改动小而可测，并贴合现有架构。"},
+  "sponsors.pageTitle": {"message": "赞助商"},
+  "sponsors.pageDescription": {"message": "赞助 BackupX 的可靠性、文档、存储兼容性和长期维护。"},
+  "sponsors.tag": {"message": "赞助商"},
+  "sponsors.title": {"message": "赞助 BackupX 生态"},
+  "sponsors.subtitle": {"message": "赞助帮助 BackupX 更贴近真实运维：经过验证的存储 Provider、可靠发布、恢复信心和更完善的文档。"}
 }
--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/bare-metal.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/bare-metal.md
@@ -10,20 +10,34 @@ description: 从预编译包或源码部署 BackupX（systemd + Nginx）。

 ```bash
 # 下载对应平台的压缩包
-curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-v1.6.0-linux-amd64.tar.gz
+curl -LO https://github.com/Awuqing/BackupX/releases/latest/download/backupx-linux-amd64.tar.gz

 # 解压并安装
-tar xzf backupx-v*-linux-amd64.tar.gz && cd backupx-*
+tar xzf backupx-linux-amd64.tar.gz && cd backupx-*-linux-amd64
 sudo ./install.sh
 ```

 安装脚本自动完成以下步骤：

 1. 创建系统用户 `backupx`
-2. 复制二进制到 `/opt/backupx/`
-3. 生成默认 `config.yaml`（含安全的 JWT/加密密钥）
+2. 复制二进制到 `/opt/backupx/bin/backupx`，并把 Web 控制台复制到 `/opt/backupx/web`
+3. 把默认配置安装到 `/etc/backupx/config.yaml`
 4. 安装并启用 `backupx.service` systemd 单元
 5. （可选）生成 Nginx 站点配置 — 参见 [Nginx 反向代理](./nginx)
+6. 验证首次初始化接口就绪后才报告安装成功
+
+如果要部署多节点集群，安装后请编辑 `/etc/backupx/config.yaml`，设置远程 Agent 可访问到的 Master URL：
+
+```yaml
+server:
+  external_url: "https://backup.example.com"
+```
+
+修改后重启 BackupX：
+
+```bash
+sudo systemctl restart backupx
+```

 ## 从源码构建

@@ -50,11 +64,13 @@ After=network.target
 [Service]
 Type=simple
 User=backupx
+Group=backupx
 WorkingDirectory=/opt/backupx
-ExecStart=/opt/backupx/backupx --config /opt/backupx/config.yaml
+ExecStart=/opt/backupx/bin/backupx -config /etc/backupx/config.yaml
 Restart=on-failure
-RestartSec=5s
-LimitNOFILE=65536
+RestartSec=5
+NoNewPrivileges=true
+LimitNOFILE=65535

 [Install]
 WantedBy=multi-user.target
@@ -66,17 +82,20 @@ WantedBy=multi-user.target
 sudo systemctl status backupx
 sudo journalctl -u backupx -f    # 实时日志
 sudo systemctl restart backupx
+curl -fsS http://127.0.0.1:8340/api/auth/setup/status
 ```

+访问 `http://your-server:8340`，可按需切换到 English，然后在“系统初始化 / System setup”页面创建首个管理员。若监听端口不是默认值，请为安装脚本传入对应的 `HEALTH_URL`。
+
 ## 密码重置

 忘记管理员密码时：

 ```bash
-/opt/backupx/backupx reset-password \
+/opt/backupx/bin/backupx reset-password \
  --username admin \
  --password 'newpass123' \
-  --config /opt/backupx/config.yaml
+  --config /etc/backupx/config.yaml
 ```

 Docker 等效命令：
--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/configuration.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/configuration.md
@@ -15,13 +15,14 @@ server:
  host: "0.0.0.0"             # BACKUPX_SERVER_HOST
  port: 8340                  # BACKUPX_SERVER_PORT
  mode: "release"             # release | debug
+  external_url: ""            # BACKUPX_SERVER_EXTERNAL_URL — Agent 安装脚本使用的 Master 对外 URL

 database:
  path: "./data/backupx.db"   # BACKUPX_DATABASE_PATH — 内嵌 SQLite

 security:
  jwt_secret: ""              # BACKUPX_SECURITY_JWT_SECRET — 留空自动生成
-  jwt_expires_in: "24h"
+  jwt_expire: "24h"           # BACKUPX_SECURITY_JWT_EXPIRE
  encryption_key: ""          # 用于加密存储配置的 AES-256-GCM 密钥

 backup:
@@ -46,7 +47,20 @@ log:
 | 配置项 | 环境变量 |
 |--------|----------|
 | `server.port` | `BACKUPX_SERVER_PORT` |
+| `server.external_url` | `BACKUPX_SERVER_EXTERNAL_URL` |
+| `security.jwt_expire` | `BACKUPX_SECURITY_JWT_EXPIRE` |
 | `log.level` | `BACKUPX_LOG_LEVEL` |
 | `backup.max_concurrent` | `BACKUPX_BACKUP_MAX_CONCURRENT` |
 | `backup.temp_dir` | `BACKUPX_BACKUP_TEMP_DIR` |
 | `backup.bandwidth_limit` | `BACKUPX_BACKUP_BANDWIDTH_LIMIT` |
+
+## Master 对外 URL
+
+当 BackupX 部署在 Docker、Nginx、负载均衡或多层反向代理后面，且后端收到的内部 Host 不是远程 Agent 可访问地址时，请配置 `server.external_url`：
+
+```yaml
+server:
+  external_url: "https://backup.example.com"
+```
+
+BackupX 会用这个地址渲染一键 Agent 安装脚本和 docker-compose 片段。该地址必须能被所有 Agent 主机访问。只有在 `X-Forwarded-Proto` / `X-Forwarded-Host` 可靠且正好指向 Agent 可访问地址时，才建议留空。
--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/docker.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/deployment/docker.md
@@ -25,6 +25,8 @@ services:
      - /etc/nginx:/mnt/nginx-conf:ro
    environment:
      - TZ=Asia/Shanghai
+      # 远程 Agent 需要通过公网或可路由地址连接 Master 时必须配置：
+      # - BACKUPX_SERVER_EXTERNAL_URL=https://backup.example.com
      - BACKUPX_LOG_LEVEL=info
      - BACKUPX_BACKUP_MAX_CONCURRENT=2

@@ -42,6 +44,17 @@ docker compose up -d

 想备份宿主机上的文件，需要将对应路径挂载进容器。在 Web UI 创建文件类型任务时，把源路径指向挂载后的容器内路径（如 `/mnt/www`）。

+## 多节点集群
+
+如果要在其他机器部署 Agent，请在 Master 容器上设置 `BACKUPX_SERVER_EXTERNAL_URL`，值为所有 Agent 都能访问到的 URL：
+
+```yaml
+environment:
+  - BACKUPX_SERVER_EXTERNAL_URL=https://backup.example.com
+```
+
+Agent 跨不可信网络访问时建议使用 HTTPS。控制台生成的一键安装脚本和 docker-compose 片段会把这个值写成 `BACKUPX_AGENT_MASTER`。
+
 ## 环境变量

 所有配置项都可以通过 `BACKUPX_` 前缀环境变量覆盖：
--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/backup-types.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/backup-types.md
@@ -8,14 +8,26 @@ description: 文件、MySQL、PostgreSQL、SQLite 和 SAP HANA — 各自的能

 BackupX 支持五种内置备份类型，类型决定了用哪个 runner 执行。

+当任务路由到远程 Agent 时，源路径和外部工具都会在该 Agent 主机上解析。多存储目标上传仍会逐目标记录结果；只要至少一个目标上传成功，备份记录即为成功，详情中的目标结果表会展示部分失败。
+
 ## 文件 / 目录

-打包（可选 gzip）一个或多个文件系统路径。
+文件任务提供三种备份模式：
+
+- **全量归档** — 每次生成一份可独立使用的 tar 产物
+- **差异归档** — 只保存相对当前全量基线的变化，并按周期刷新全量基线
+- **CDC 去重仓库** — 按稳定的 512 KiB / 1 MiB / 4 MiB 内容边界切块，将新块合并到不可变的 32 MiB pack，每次运行只新增一份小型快照清单
+
+CDC 仓库会在不同文件、不同快照之间复用相同内容。完整恢复、选择性恢复、完整性校验、下载为 tar、保留策略和垃圾回收都通过仓库索引定位分块。压缩与加密按块执行；启用加密时使用带密钥的块 ID，不暴露明文哈希。
+
+当前仓库索引采用单写者模型，因此 CDC 模式仅在 Master 本机执行。如需保存多份完整仓库，请在任务中直接多选主存储目标。对象级副本复制会被禁用，因为只有快照清单、没有共享 pack 与索引并不是完整备份。
+
+文件任务的通用选项：

 - **源路径** 支持多个（UI 中每行一个）
 - **排除模式** 支持 gitignore 风格的通配符
 - 可选跟随符号链接、保留权限
- 输出单个 `.tar` 或 `.tar.gz`
+- 全量与差异模式输出 `.tar`、`.tar.gz` 或 `.tar.zst`

 ## MySQL

--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/multi-node.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/multi-node.md
@@ -26,23 +26,53 @@ BackupX 支持 Master-Agent 模式：备份任务可以指定在哪个节点执
 - **执行** — Agent 复用 BackupRunner（file / mysql / postgresql / sqlite / saphana）并直接上传到存储
 - **安全** — 每个节点独立 Token；Agent 不持有 Master 的 JWT 密钥或 AES-256 加密密钥

+## 把 B/C/D 服务器集中备份到 M
+
+Master 作为控制面，每台源服务器安装一个 Agent。任务里的 **源服务器** 决定源路径和数据库工具在哪台机器解析，**存储目标** 决定备份产物最终保留在哪里。
+
+BackupX 会根据目标类型选择数据路径：
+
+| 目标 | 数据路径 |
+| --- | --- |
+| S3、WebDAV、FTP、云盘或其他网络后端 | Agent 直接流式上传到目标 |
+| 启用 **远程备份经 Master 中转** 的 `local_disk`（例如通过 NFS 挂载的存储服务器 M） | Agent 通过认证后的 Master API 流式中转，由 Master 写入配置目录 |
+
+中转过程不会在 Master 上额外落一份完整临时文件。把 Master 本地磁盘中的备份恢复到源 Agent 时会走反向流式通道。Agent 与 Master 之间跨越不可信网络时必须配置 HTTPS。
+
+典型的 `A → {B,C,D} → M` 拓扑按以下步骤配置：
+
+1. 在 A 运行 BackupX Master；如果 M 以 NFS 等文件系统提供存储，先把 M 挂载到 A。
+2. 为该挂载点创建 `local_disk` 目标并保持 **远程备份经 Master 中转** 开启；如果 M 提供 S3/WebDAV，也可直接创建对应网络目标。升级前已有的本地磁盘目标会继续沿用 Agent 本机落盘，手动开启该选项后才切换到中央目录。
+3. 从 **节点管理** 分别在 B、C、D 安装 Agent。
+4. 为每台源服务器创建任务，在 **源服务器** 选择 B/C/D，浏览该服务器的路径，再把 M 选为存储目标。相同任务也可用源服务器池标签动态调度。
+5. 在备份记录中检查逐目标结果。Master 本地磁盘目标会记录 `master_relay` 中转模式，网络后端仍为 `direct` 直传。
+
 ## 一键部署步骤

+### 0. 为生产集群设置 Master 对外 URL
+
+生成 Agent 安装命令前，请先确认 Master URL 对所有目标主机稳定可达。
+
+如果 BackupX 部署在 Docker、Nginx、负载均衡或外层反向代理后面，请在 Master 配置 `server.external_url` 或环境变量 `BACKUPX_SERVER_EXTERNAL_URL`：
+
+```yaml title="config.yaml"
+server:
+  external_url: "https://backup.example.com"
+```
+
+该 URL 会写入 systemd 单元、前台运行命令和 docker-compose 片段。如果地址不正确，Agent 可能安装成功但始终离线，因为它会持续轮询一个内网地址或仅浏览器可访问的地址。
+
 ### 1. 打开安装向导

 Web 控制台 → **节点管理** → **添加节点**，打开三步向导：

 - **第一步 · 节点信息**：填写节点名称；或切换"批量创建"粘贴多行名称（每行一个，最多 50 个）
 - **第二步 · 部署参数**：选择安装模式（`systemd` 推荐、`Docker`、`前台运行` 调试用）、架构（默认自动检测）、Agent 版本（默认跟随 Master 版本）、有效期（5 分钟 / 15 分钟 / 1 小时 / 24 小时）、下载源（`GitHub` 直连或 `ghproxy` 镜像，国内服务器建议后者）
- **第三步 · 安装命令**：一行 `curl ... | sudo sh` 命令 + 实时倒计时。点击复制，粘贴到目标机以 root 权限执行
+- **第三步 · 安装命令**：一条一键安装命令 + 实时倒计时。点击复制，粘贴到目标机以 root 权限执行。默认命令会嵌入已渲染的安装脚本，目标机无需再通过反向代理访问 `/api/install/:token`；公开安装 URL 仍作为备用路径保留。

 ### 2. 目标机一条命令完成

-示例（systemd 模式）：
-
-```bash
-curl -fsSL https://master.example.com/install/Xk3p9...vM | sudo sh
-```
+请直接使用 Web 控制台生成的命令。该命令会把安装脚本写入临时文件，校验 `BACKUPX_AGENT_INSTALL_V1` 魔数，再以 root 权限执行。

 脚本会自动：

@@ -53,6 +83,10 @@ curl -fsSL https://master.example.com/install/Xk3p9...vM | sudo sh
 5. 执行 `systemctl enable --now backupx-agent`
 6. 轮询 `/api/v1/agent/self`，直到 Master 确认 `status: online`（最多 30 秒）

+Docker 模式使用同一组环境变量约定：`BACKUPX_AGENT_MASTER`、`BACKUPX_AGENT_TOKEN` 和 `BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp`。容器启动后，安装脚本同样会探测 `/api/v1/agent/self`；如果节点没有上线，会输出 `docker ps` 与 `docker logs --tail=100 backupx-agent` 排查命令，并以非零状态退出。
+
+如果使用 URL 备用命令时 `curl` 输出 HTML，或 shell 报 `Syntax error: newline unexpected`，说明安装 URL 被 Web 控制台接管而不是转发到后端。需要确保 `/api/install/` 或 `/install/` 至少一个路径能转发到 BackupX 后端，或改用控制台生成的嵌入式命令。
+
 脚本是幂等的：升级或重装只需重新生成一条安装命令再跑一次。一次性安装链接在 TTL 到期或被首次消费后立即作废。

 ### 3. 随时轮换 Agent Token
@@ -65,14 +99,20 @@ curl -fsSL https://master.example.com/install/Xk3p9...vM | sudo sh

 ### 5. 把任务路由到该节点

-在 **备份任务** 页面新建任务时选择对应节点。任务触发时：
+在 **备份任务** 页面新建任务时选择对应源服务器。任务触发时：

 - 本机 / 未指定（`nodeId=0`）：Master 进程内直接执行
 - 远程节点：Master 写入命令队列 → Agent 拉取 → Agent 本地执行 → 上传 → 回报

+节点列表会展示 Agent 健康与命令队列状态：pending/dispatched 深度、运行中的长任务、超时数、最旧活跃命令年龄和最近 Agent 错误。同样的队列深度、运行中命令数和超时快照会导出为 Prometheus 指标：
+
+- `backupx_agent_command_queue_depth`
+- `backupx_agent_command_running`
+- `backupx_agent_command_timeout_total`
+
 ## 已知限制

- **Agent 不支持加密备份**：Agent 不持有 Master 的 AES-256 密钥。`encrypt: true` 的任务路由到 Agent 时会直接上报失败
+- **加密备份仅支持 Master 本机执行**：Agent 不持有 Master 的 AES-256 密钥。创建或更新任务时，如果 `encrypt: true` 且选择了远程节点或节点池，会在入口直接拒绝
 - **目录浏览超时**：远程目录浏览通过命令队列做同步 RPC，默认 15s 超时
 - **派发命令超时**：Agent 领取但未完成的命令超过 10 分钟会被置 `timeout`

--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/storage-backends.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/features/storage-backends.md
@@ -19,7 +19,9 @@ BackupX 的目标是接入任何你想放置备份文件的地方。
 | **Google Drive** | Client ID/Secret + OAuth 授权 |
 | **WebDAV** | 地址 + 用户名/密码 |
 | **FTP / FTPS** | 主机 + 端口 + 用户名/密码 |
-| **本地磁盘** | 目标目录（绝对路径） |
+| **本地磁盘** | 目标目录（绝对路径）+ 可选的远程 Agent 经 Master 中转 |
+
+新建本地磁盘目标默认开启 **远程备份经 Master 中转**。开启时，配置目录属于 Master，挂载到 Master 的存储服务器可集中接收多台源 Agent 的备份；如果该路径本就属于各 Agent，请关闭此选项。升级前已有目标保持原来的 Agent 本机落盘行为，只有显式开启后才会切换。

 ## Rclone 后端

--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/getting-started/installation.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/getting-started/installation.md
@@ -55,10 +55,11 @@ sudo ./install.sh        # 创建系统用户、安装到 /opt/backupx、配置
 安装脚本会自动：

 1. 创建 `backupx` 系统用户
-2. 安装二进制到 `/opt/backupx/backupx`
-3. 生成 `/opt/backupx/config.yaml`（含安全默认值）
+2. 安装二进制到 `/opt/backupx/bin/backupx`，并把 Web 控制台安装到 `/opt/backupx/web`
+3. 生成 `/etc/backupx/config.yaml`（含安全默认值）
 4. 注册并启用 `backupx.service` systemd 单元
 5. （可选）配置 Nginx 反向代理
+6. 等待 `/api/auth/setup/status` 就绪；启动失败时输出 systemd 诊断并返回非零状态

 ## 从源码构建

@@ -67,16 +68,17 @@ sudo ./install.sh        # 创建系统用户、安装到 /opt/backupx、配置
 ```bash
 git clone https://github.com/Awuqing/BackupX.git && cd BackupX
 make build
-# 或使用国内镜像加速构建 Docker
-make docker-cn
+sudo ./deploy/install.sh
 ```

 `make build` 完成后，二进制位于 `server/bin/backupx`，构建好的 Web UI 位于 `web/dist/`。
+安装脚本会直接使用这两个路径，不需要 Docker 运行时。如果已有配置修改了默认端口，可覆盖就绪检查地址，例如：`sudo HEALTH_URL=http://127.0.0.1:9000/api/auth/setup/status ./deploy/install.sh`。

 ## 验证安装

 ```bash
-backupx --version           # 输出如 v1.6.0
+/opt/backupx/bin/backupx --version
+curl -fsS http://127.0.0.1:8340/api/auth/setup/status
 ```

-打开浏览器访问 `http://your-server:8340`，会进入初始化管理员账户页面。
+打开浏览器访问 `http://your-server:8340`，可在右上角选择 **中文** 或 **English**。全新数据库会显示“系统初始化 / System setup”，在这里创建首个管理员用户名和密码。如果没有出现初始化表单，请先重试上面的状态接口，不要直接尝试登录。
--- a/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/getting-started/quick-start.md
+++ b/docs-site/i18n/zh-CN/docusaurus-plugin-content-docs/current/getting-started/quick-start.md
@@ -42,6 +42,8 @@ description: 部署 BackupX、添加存储目标、创建第一个备份任务
 2. **源配置** — 文件备份选择源路径（支持多个），数据库备份填写连接信息
 3. **存储与策略** — 选择存储目标（支持多个）、压缩策略、保留天数、是否加密

+对于路由到 Agent 的任务，加密必须关闭，因为 Agent 不会拿到 Master 的加密密钥。BackupX 会在创建/更新阶段拒绝开启加密的远程节点或节点池任务。
+
 保存后可点击 **立即执行** 测试，**备份记录** 页面实时查看执行日志。

 :::note
--- a/docs-site/i18n/zh-CN/docusaurus-theme-classic/footer.json
+++ b/docs-site/i18n/zh-CN/docusaurus-theme-classic/footer.json
@@ -2,6 +2,8 @@
  "link.title.Docs": {"message": "文档"},
  "link.title.Features": {"message": "功能"},
  "link.title.More": {"message": "更多"},
+  "link.title.Community": {"message": "社区"},
+  "link.title.Sponsors": {"message": "赞助商"},
  "link.item.label.Introduction": {"message": "简介"},
  "link.item.label.Quick Start": {"message": "快速开始"},
  "link.item.label.Installation": {"message": "安装"},
@@ -11,5 +13,11 @@
  "link.item.label.GitHub": {"message": "GitHub"},
  "link.item.label.Releases": {"message": "Releases"},
  "link.item.label.Docker Hub": {"message": "Docker Hub"},
-  "link.item.label.Issues": {"message": "Issues"}
+  "link.item.label.Issues": {"message": "Issues"},
+  "link.item.label.Contributors": {"message": "贡献者"},
+  "link.item.label.Pull Requests": {"message": "Pull Requests"},
+  "link.item.label.Sponsor": {"message": "赞助"},
+  "link.item.label.Sponsor BackupX": {"message": "赞助 BackupX"},
+  "link.item.label.Partnership": {"message": "合作伙伴"},
+  "link.item.label.Sponsor tiers": {"message": "赞助层级"}
 }
--- a/docs-site/i18n/zh-CN/docusaurus-theme-classic/navbar.json
+++ b/docs-site/i18n/zh-CN/docusaurus-theme-classic/navbar.json
@@ -7,6 +7,14 @@
    "message": "下载",
    "description": "Navbar item: Downloads"
  },
+  "item.label.Community": {
+    "message": "社区",
+    "description": "Navbar item: Community"
+  },
+  "item.label.Sponsors": {
+    "message": "赞助商",
+    "description": "Navbar item: Sponsors"
+  },
  "item.label.GitHub": {
    "message": "GitHub",
    "description": "Navbar item: GitHub"
--- a/docs-site/package-lock.json
+++ b/docs-site/package-lock.json
@@ -1,12 +1,12 @@
 {
  "name": "docs-site-tmp",
-  "version": "0.0.0",
+  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "docs-site-tmp",
-      "version": "0.0.0",
+      "version": "1.0.0",
      "dependencies": {
        "@docusaurus/core": "3.10.0",
        "@docusaurus/faster": "3.10.0",
@@ -164,7 +164,6 @@
      "resolved": "https://registry.npmmirror.com/@algolia/client-search/-/client-search-5.50.2.tgz",
      "integrity": "sha512-ypSboUJ3XJoQz5DeDo82hCnrRuwq3q9ZdFhVKAik9TnZh1DvLqoQsrbBjXg7C7zQOtV/Qbge/HmyoV6V5L7MhQ==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "@algolia/client-common": "5.50.2",
        "@algolia/requester-browser-xhr": "5.50.2",
@@ -263,12 +262,12 @@
      }
    },
    "node_modules/@babel/code-frame": {
-      "version": "7.29.0",
-      "resolved": "https://registry.npmmirror.com/@babel/code-frame/-/code-frame-7.29.0.tgz",
-      "integrity": "sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz",
+      "integrity": "sha512-Aup7aUOfpbAUg2ROOJN6Iw5f9DMBlzu0mIkm/malLQFN/YQgO48wCj0Kxa3sEHJvPVFg7siR+qRInwXd2qhQKw==",
      "license": "MIT",
      "dependencies": {
-        "@babel/helper-validator-identifier": "^7.28.5",
+        "@babel/helper-validator-identifier": "^7.29.7",
        "js-tokens": "^4.0.0",
        "picocolors": "^1.1.1"
      },
@@ -290,7 +289,6 @@
      "resolved": "https://registry.npmmirror.com/@babel/core/-/core-7.29.0.tgz",
      "integrity": "sha512-CGOfOJqWjg2qW/Mb6zNsDm+u5vFQ8DxXfbM09z69p5Z6+mE1ikP2jUXw+j42Pf1XTYED2Rni5f95npYeuwMDQA==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "@babel/code-frame": "^7.29.0",
        "@babel/generator": "^7.29.0",
@@ -326,13 +324,13 @@
      }
    },
    "node_modules/@babel/generator": {
-      "version": "7.29.1",
-      "resolved": "https://registry.npmmirror.com/@babel/generator/-/generator-7.29.1.tgz",
-      "integrity": "sha512-qsaF+9Qcm2Qv8SRIMMscAvG4O3lJ0F1GuMo5HR/Bp02LopNgnZBC/EkbevHFeGs4ls/oPz9v+Bsmzbkbe+0dUw==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.29.7.tgz",
+      "integrity": "sha512-DkXD5OJQaAQIdZ1bt3UZdEnHAn9Imd3IVBdX03UFe+ony9Ojw5pzr9YVKGDY1jt+Gcn/FnGkNf8r+Vj5NOJWtQ==",
      "license": "MIT",
      "dependencies": {
-        "@babel/parser": "^7.29.0",
-        "@babel/types": "^7.29.0",
+        "@babel/parser": "^7.29.7",
+        "@babel/types": "^7.29.7",
        "@jridgewell/gen-mapping": "^0.3.12",
        "@jridgewell/trace-mapping": "^0.3.28",
        "jsesc": "^3.0.2"
@@ -451,9 +449,9 @@
      }
    },
    "node_modules/@babel/helper-globals": {
-      "version": "7.28.0",
-      "resolved": "https://registry.npmmirror.com/@babel/helper-globals/-/helper-globals-7.28.0.tgz",
-      "integrity": "sha512-+W6cISkXFa1jXsDEdYA8HeevQT/FULhxzR99pxphltZcVaugps53THCeiWA8SguxxpSp3gKPiuYfSWopkLQ4hw==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-globals/-/helper-globals-7.29.7.tgz",
+      "integrity": "sha512-3nQVUAtvkKH9zahfWgw96Jc/uFOmjACE1kQz82E2lqWmHBgjzbNlsC22nuQTfahmWeQtTq5nQ/4Nnd2A1wj4zA==",
      "license": "MIT",
      "engines": {
        "node": ">=6.9.0"
@@ -473,27 +471,27 @@
      }
    },
    "node_modules/@babel/helper-module-imports": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmmirror.com/@babel/helper-module-imports/-/helper-module-imports-7.28.6.tgz",
-      "integrity": "sha512-l5XkZK7r7wa9LucGw9LwZyyCUscb4x37JWTPz7swwFE/0FMQAGpiWUZn8u9DzkSBWEcK25jmvubfpw2dnAMdbw==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.29.7.tgz",
+      "integrity": "sha512-ejHwrQQYcm9xnTivShn2IDOlIzInN34AXskvq9QicvCtEzq1Vzclu/tKF8Jq1Cg8JG2GL6/EmjgsCT7lXepE3g==",
      "license": "MIT",
      "dependencies": {
-        "@babel/traverse": "^7.28.6",
-        "@babel/types": "^7.28.6"
+        "@babel/traverse": "^7.29.7",
+        "@babel/types": "^7.29.7"
      },
      "engines": {
        "node": ">=6.9.0"
      }
    },
    "node_modules/@babel/helper-module-transforms": {
-      "version": "7.28.6",
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      "license": "MIT",
-      "peer": true,
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        "fast-json-stable-stringify": "^2.0.0",
@@ -10571,7 +10553,7 @@
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    "node_modules/iconv-lite": {
      "version": "0.4.24",
-      "resolved": "https://registry.npmmirror.com/iconv-lite/-/iconv-lite-0.4.24.tgz",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
      "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
      "license": "MIT",
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@@ -12069,7 +12051,7 @@
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    "node_modules/media-typer": {
      "version": "0.3.0",
-      "resolved": "https://registry.npmmirror.com/media-typer/-/media-typer-0.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
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      "license": "MIT",
      "engines": {
@@ -14204,7 +14186,6 @@
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      "license": "MIT",
-      "peer": true,
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        "fast-json-stable-stringify": "^2.0.0",
@@ -14260,7 +14241,7 @@
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      "version": "1.13.4",
-      "resolved": "https://registry.npmmirror.com/object-inspect/-/object-inspect-1.13.4.tgz",
+      "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.4.tgz",
      "integrity": "sha512-W67iLl4J2EXEGTbfeHCffrjDfitvLANg0UlX3wFUUSTx92KXRFegMHUVgSqE+wvhAbi4WqjGg9czysTV2Epbew==",
      "license": "MIT",
      "engines": {
@@ -14719,9 +14700,9 @@
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-      "version": "8.5.10",
-      "resolved": "https://registry.npmmirror.com/postcss/-/postcss-8.5.10.tgz",
-      "integrity": "sha512-pMMHxBOZKFU6HgAZ4eyGnwXF/EvPGGqUr0MnZ5+99485wwW41kW91A4LOGxSHhgugZmSChL5AlElNdwlNgcnLQ==",
+      "version": "8.5.14",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.14.tgz",
+      "integrity": "sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==",
      "funding": [
        {
          "type": "opencollective",
@@ -14737,7 +14718,6 @@
        }
      ],
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "nanoid": "^3.3.11",
        "picocolors": "^1.1.1",
@@ -15641,7 +15621,6 @@
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      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "cssesc": "^3.0.0",
        "util-deprecate": "^1.0.2"
@@ -16335,9 +16314,9 @@
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    },
    "node_modules/qs": {
-      "version": "6.14.2",
-      "resolved": "https://registry.npmmirror.com/qs/-/qs-6.14.2.tgz",
-      "integrity": "sha512-V/yCWTTF7VJ9hIh18Ugr2zhJMP01MY7c5kh4J870L7imm6/DIzBsNLTXzMwUA3yZ5b/KBqLx8Kp3uRvd7xSe3Q==",
+      "version": "6.15.2",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.2.tgz",
+      "integrity": "sha512-Rzq0KEyX/w/tEybncDgdkZrJgVUsUMk3xjh3t5bv3S1HTAtg+uOYt72+ZfwiQwKdysThkTBdL/rTi6HDmX9Ddw==",
      "license": "BSD-3-Clause",
      "dependencies": {
        "side-channel": "^1.1.0"
@@ -16401,7 +16380,7 @@
    },
    "node_modules/raw-body": {
      "version": "2.5.3",
-      "resolved": "https://registry.npmmirror.com/raw-body/-/raw-body-2.5.3.tgz",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.3.tgz",
      "integrity": "sha512-s4VSOf6yN0rvbRZGxs8Om5CWj6seneMwK3oDb4lWDH0UPhWcxwOWw5+qk24bxq87szX1ydrwylIOp2uG1ojUpA==",
      "license": "MIT",
      "dependencies": {
@@ -16416,7 +16395,7 @@
    },
    "node_modules/raw-body/node_modules/bytes": {
      "version": "3.1.2",
-      "resolved": "https://registry.npmmirror.com/bytes/-/bytes-3.1.2.tgz",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
      "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
      "license": "MIT",
      "engines": {
@@ -16458,7 +16437,6 @@
      "resolved": "https://registry.npmmirror.com/react/-/react-19.2.5.tgz",
      "integrity": "sha512-llUJLzz1zTUBrskt2pwZgLq59AemifIftw4aB7JxOqf1HY2FDaGDxgwpAPVzHU1kdWabH7FauP4i1oEeer2WCA==",
      "license": "MIT",
-      "peer": true,
      "engines": {
        "node": ">=0.10.0"
      }
@@ -16468,7 +16446,6 @@
      "resolved": "https://registry.npmmirror.com/react-dom/-/react-dom-19.2.5.tgz",
      "integrity": "sha512-J5bAZz+DXMMwW/wV3xzKke59Af6CHY7G4uYLN1OvBcKEsWOs4pQExj86BBKamxl/Ik5bx9whOrvBlSDfWzgSag==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "scheduler": "^0.27.0"
      },
@@ -16524,7 +16501,6 @@
      "resolved": "https://registry.npmmirror.com/@docusaurus/react-loadable/-/react-loadable-6.0.0.tgz",
      "integrity": "sha512-YMMxTUQV/QFSnbgrP3tjDzLHRg7vsbMn8e9HAa8o/1iXoiomo48b7sk/kkmWEuWNDPJVlKSJRB6Y2fHqdJk+SQ==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "@types/react": "*"
      },
@@ -16553,7 +16529,6 @@
      "resolved": "https://registry.npmmirror.com/react-router/-/react-router-5.3.4.tgz",
      "integrity": "sha512-Ys9K+ppnJah3QuaRiLxk+jDWOR1MekYQrlytiXxC1RyfbdsZkS5pvKAzCCr031xHixZwpnsYNT5xysdFHQaYsA==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "@babel/runtime": "^7.12.13",
        "history": "^4.9.0",
@@ -17229,7 +17204,7 @@
    },
    "node_modules/safer-buffer": {
      "version": "2.1.2",
-      "resolved": "https://registry.npmmirror.com/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
      "license": "MIT"
    },
@@ -17600,7 +17575,7 @@
    },
    "node_modules/side-channel": {
      "version": "1.1.0",
-      "resolved": "https://registry.npmmirror.com/side-channel/-/side-channel-1.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.1.0.tgz",
      "integrity": "sha512-ZX99e6tRweoUXqR+VBrslhda51Nh5MTQwou5tnUDgbtyM0dBgmhEDtWGP/xbKn6hqfPRHujUNwz5fy/wbbhnpw==",
      "license": "MIT",
      "dependencies": {
@@ -17619,7 +17594,7 @@
    },
    "node_modules/side-channel-list": {
      "version": "1.0.1",
-      "resolved": "https://registry.npmmirror.com/side-channel-list/-/side-channel-list-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/side-channel-list/-/side-channel-list-1.0.1.tgz",
      "integrity": "sha512-mjn/0bi/oUURjc5Xl7IaWi/OJJJumuoJFQJfDDyO46+hBWsfaVM65TBHq2eoZBhzl9EchxOijpkbRC8SVBQU0w==",
      "license": "MIT",
      "dependencies": {
@@ -17635,7 +17610,7 @@
    },
    "node_modules/side-channel-map": {
      "version": "1.0.1",
-      "resolved": "https://registry.npmmirror.com/side-channel-map/-/side-channel-map-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/side-channel-map/-/side-channel-map-1.0.1.tgz",
      "integrity": "sha512-VCjCNfgMsby3tTdo02nbjtM/ewra6jPHmpThenkTYh8pG9ucZ/1P8So4u4FGBek/BjpOVsDCMoLA/iuBKIFXRA==",
      "license": "MIT",
      "dependencies": {
@@ -17653,7 +17628,7 @@
    },
    "node_modules/side-channel-weakmap": {
      "version": "1.0.2",
-      "resolved": "https://registry.npmmirror.com/side-channel-weakmap/-/side-channel-weakmap-1.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/side-channel-weakmap/-/side-channel-weakmap-1.0.2.tgz",
      "integrity": "sha512-WPS/HvHQTYnHisLo9McqBHOJk2FkHO/tlpvldyrnem4aeQp4hai3gythswg6p01oSoTl58rcpiFAjF2br2Ak2A==",
      "license": "MIT",
      "dependencies": {
@@ -18328,8 +18303,7 @@
      "version": "2.8.1",
      "resolved": "https://registry.npmmirror.com/tslib/-/tslib-2.8.1.tgz",
      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
-      "license": "0BSD",
-      "peer": true
+      "license": "0BSD"
    },
    "node_modules/tsyringe": {
      "version": "4.10.0",
@@ -18363,7 +18337,7 @@
    },
    "node_modules/type-is": {
      "version": "1.6.18",
-      "resolved": "https://registry.npmmirror.com/type-is/-/type-is-1.6.18.tgz",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
      "license": "MIT",
      "dependencies": {
@@ -18376,7 +18350,7 @@
    },
    "node_modules/type-is/node_modules/mime-db": {
      "version": "1.52.0",
-      "resolved": "https://registry.npmmirror.com/mime-db/-/mime-db-1.52.0.tgz",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
      "license": "MIT",
      "engines": {
@@ -18385,7 +18359,7 @@
    },
    "node_modules/type-is/node_modules/mime-types": {
      "version": "2.1.35",
-      "resolved": "https://registry.npmmirror.com/mime-types/-/mime-types-2.1.35.tgz",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
      "license": "MIT",
      "dependencies": {
@@ -18410,7 +18384,6 @@
      "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
      "devOptional": true,
      "license": "Apache-2.0",
-      "peer": true,
      "bin": {
        "tsc": "bin/tsc",
        "tsserver": "bin/tsserver"
@@ -18752,7 +18725,6 @@
      "resolved": "https://registry.npmmirror.com/ajv/-/ajv-6.14.0.tgz",
      "integrity": "sha512-IWrosm/yrn43eiKqkfkHis7QioDleaXQHdDVPKg0FSwwd/DuvyX79TZnFOnYpB7dcsFAMmtFztZuXPDvSePkFw==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "fast-deep-equal": "^3.1.1",
        "fast-json-stable-stringify": "^2.0.0",
@@ -18951,7 +18923,6 @@
      "resolved": "https://registry.npmmirror.com/webpack/-/webpack-5.106.2.tgz",
      "integrity": "sha512-wGN3qcrBQIFmQ/c0AiOAQBvrZ5lmY8vbbMv4Mxfgzqd/B6+9pXtLo73WuS1dSGXM5QYY3hZnIbvx+K1xxe6FyA==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "@types/eslint-scope": "^3.7.7",
        "@types/estree": "^1.0.8",
@@ -19093,9 +19064,9 @@
      }
    },
    "node_modules/webpack-dev-server": {
-      "version": "5.2.3",
-      "resolved": "https://registry.npmmirror.com/webpack-dev-server/-/webpack-dev-server-5.2.3.tgz",
-      "integrity": "sha512-9Gyu2F7+bg4Vv+pjbovuYDhHX+mqdqITykfzdM9UyKqKHlsE5aAjRhR+oOEfXW5vBeu8tarzlJFIZva4ZjAdrQ==",
+      "version": "5.2.4",
+      "resolved": "https://registry.npmjs.org/webpack-dev-server/-/webpack-dev-server-5.2.4.tgz",
+      "integrity": "sha512-GqDPGZN9bRqKBTkp4aWkobDDHMsrXKoGSdOH56smIri8qR0JG8gfL8/v/f/OZR3/OKXjG8uwJbFVhKm/FNU/UA==",
      "license": "MIT",
      "dependencies": {
        "@types/bonjour": "^3.5.13",
--- a/docs-site/src/components/HomepageCommunity/index.tsx
+++ b/docs-site/src/components/HomepageCommunity/index.tsx
@@ -0,0 +1,329 @@
+import type {ReactNode} from 'react';
+import {useEffect, useState} from 'react';
+import Heading from '@theme/Heading';
+import Translate from '@docusaurus/Translate';
+import Link from '@docusaurus/Link';
+import styles from './styles.module.css';
+
+type SponsorSlot = {
+  brand: ReactNode;
+  name: ReactNode;
+  href?: string;
+};
+
+type Contributor = {
+  login: string;
+  avatarUrl?: string;
+  contributions: number;
+  type: string;
+  href: string;
+};
+
+type GitHubContributor = {
+  login: string;
+  avatar_url?: string;
+  contributions?: number;
+  html_url?: string;
+  type?: string;
+};
+
+type CommunityPath = {
+  title: ReactNode;
+  description: ReactNode;
+  href: string;
+};
+
+const SPONSOR_SLOTS: SponsorSlot[] = [
+  {
+    brand: 'BackupX',
+    name: <Translate id="community.sponsor.logo.project">Project backer</Translate>,
+    href: 'https://github.com/sponsors/Awuqing',
+  },
+  {
+    brand: 'Cloud',
+    name: <Translate id="community.sponsor.logo.cloud">Cloud partner</Translate>,
+  },
+  {
+    brand: 'Object',
+    name: <Translate id="community.sponsor.logo.object">Object storage</Translate>,
+  },
+  {
+    brand: 'CDN',
+    name: <Translate id="community.sponsor.logo.cdn">CDN partner</Translate>,
+  },
+  {
+    brand: 'DB',
+    name: <Translate id="community.sponsor.logo.database">Database partner</Translate>,
+  },
+  {
+    brand: 'Security',
+    name: <Translate id="community.sponsor.logo.security">Security audit</Translate>,
+  },
+  {
+    brand: 'Agent',
+    name: <Translate id="community.sponsor.logo.agent">Remote node lab</Translate>,
+  },
+  {
+    brand: 'Docs',
+    name: <Translate id="community.sponsor.logo.docs">Docs sponsor</Translate>,
+  },
+  {
+    brand: 'Release',
+    name: <Translate id="community.sponsor.logo.release">Release sponsor</Translate>,
+  },
+  {
+    brand: 'S3',
+    name: <Translate id="community.sponsor.logo.s3">S3 compatible</Translate>,
+  },
+  {
+    brand: 'WebDAV',
+    name: <Translate id="community.sponsor.logo.webdav">WebDAV partner</Translate>,
+  },
+  {
+    brand: 'SFTP',
+    name: <Translate id="community.sponsor.logo.sftp">SFTP partner</Translate>,
+  },
+  {
+    brand: 'Docker',
+    name: <Translate id="community.sponsor.logo.docker">Container partner</Translate>,
+  },
+  {
+    brand: 'Mirror',
+    name: <Translate id="community.sponsor.logo.mirror">Mirror partner</Translate>,
+  },
+  {
+    brand: 'Restore',
+    name: <Translate id="community.sponsor.logo.restore">Restore drill</Translate>,
+  },
+  {
+    brand: 'QA',
+    name: <Translate id="community.sponsor.logo.qa">Test lab</Translate>,
+  },
+  {
+    brand: 'OSS',
+    name: <Translate id="community.sponsor.logo.oss">Open source</Translate>,
+  },
+  {
+    brand: 'Open Slot',
+    name: <Translate id="community.sponsor.logo.open">Sponsor slot open</Translate>,
+  },
+];
+
+const FALLBACK_CONTRIBUTORS: Contributor[] = [
+  {
+    login: 'Awuqing',
+    contributions: 0,
+    type: 'User',
+    href: 'https://github.com/Awuqing',
+  },
+  {
+    login: 'dependabot[bot]',
+    contributions: 0,
+    type: 'Bot',
+    href: 'https://github.com/dependabot',
+  },
+];
+
+const COMMUNITY_PATHS: CommunityPath[] = [
+  {
+    title: <Translate id="community.path.issues.title">Report production issues</Translate>,
+    description: <Translate id="community.path.issues.desc">Share logs, deployment topology and restore expectations.</Translate>,
+    href: 'https://github.com/Awuqing/BackupX/issues',
+  },
+  {
+    title: <Translate id="community.path.docs.title">Improve docs and examples</Translate>,
+    description: <Translate id="community.path.docs.desc">Contribute deployment guides for storage, agents and databases.</Translate>,
+    href: '/docs/development/contributing',
+  },
+  {
+    title: <Translate id="community.path.code.title">Ship focused PRs</Translate>,
+    description: <Translate id="community.path.code.desc">Keep changes small, tested and aligned with the existing architecture.</Translate>,
+    href: 'https://github.com/Awuqing/BackupX/pulls',
+  },
+];
+
+function SponsorLogoCard({brand, name, href}: SponsorSlot) {
+  return (
+    <Link className={styles.sponsorLogoTile} to={href ?? 'https://github.com/sponsors/Awuqing'}>
+      <span className={styles.sponsorLogoMark}>{brand}</span>
+      <span className={styles.sponsorLogoName}>{name}</span>
+    </Link>
+  );
+}
+
+function getInitials(login: string): string {
+  return login
+    .replace(/\[bot\]$/i, '')
+    .split(/[-_\s]/)
+    .filter(Boolean)
+    .slice(0, 2)
+    .map(part => part[0]?.toUpperCase())
+    .join('') || login.slice(0, 2).toUpperCase();
+}
+
+function normalizeContributor(contributor: GitHubContributor): Contributor | null {
+  if (!contributor.login) {
+    return null;
+  }
+  return {
+    login: contributor.login,
+    avatarUrl: contributor.avatar_url,
+    contributions: contributor.contributions ?? 0,
+    type: contributor.type ?? 'User',
+    href: contributor.html_url ?? `https://github.com/${contributor.login}`,
+  };
+}
+
+function useGitHubContributors(): Contributor[] {
+  const [contributors, setContributors] = useState<Contributor[]>(FALLBACK_CONTRIBUTORS);
+
+  useEffect(() => {
+    const controller = new AbortController();
+
+    fetch('https://api.github.com/repos/Awuqing/BackupX/contributors?per_page=12', {
+      signal: controller.signal,
+      headers: {
+        Accept: 'application/vnd.github+json',
+      },
+    })
+      .then(response => {
+        if (!response.ok) {
+          throw new Error(`GitHub contributors request failed: ${response.status}`);
+        }
+        return response.json() as Promise<GitHubContributor[]>;
+      })
+      .then(payload => {
+        const nextContributors = payload
+          .map(normalizeContributor)
+          .filter((contributor): contributor is Contributor => Boolean(contributor));
+
+        if (nextContributors.length > 0) {
+          setContributors(nextContributors);
+        }
+      })
+      .catch(error => {
+        if (error instanceof Error && error.name !== 'AbortError') {
+          console.warn(error.message);
+        }
+      });
+
+    return () => controller.abort();
+  }, []);
+
+  return contributors;
+}
+
+function ContributorCard({login, avatarUrl, contributions, type, href}: Contributor) {
+  return (
+    <Link className={styles.contributorCard} to={href}>
+      {avatarUrl ? (
+        <img className={styles.avatarImage} src={avatarUrl} alt="" loading="lazy" />
+      ) : (
+        <span className={styles.avatar} aria-hidden="true">{getInitials(login)}</span>
+      )}
+      <span className={styles.contributorBody}>
+        <strong>{login}</strong>
+        <span>
+          {type === 'Bot' ? (
+            <Translate id="community.contributor.botRole">Automation contributor</Translate>
+          ) : (
+            <Translate id="community.contributor.githubRole">GitHub contributor</Translate>
+          )}
+        </span>
+        <em>
+          <Translate id="community.contributor.contributions" values={{count: contributions}}>
+            {'{count} contributions'}
+          </Translate>
+        </em>
+      </span>
+    </Link>
+  );
+}
+
+export function HomepageSponsors(): ReactNode {
+  return (
+    <div className={styles.sponsorWall}>
+      <div className={styles.sponsorWallHeader}>
+        <Heading as="h3" className={styles.sponsorWallTitle}>
+          <Translate id="community.sponsor.wallTitle">Sponsors</Translate>
+        </Heading>
+        <Link className={styles.sponsorWallAction} to="https://github.com/sponsors/Awuqing">
+          <Translate id="community.sponsor.cta">Sponsor BackupX</Translate>
+          <span aria-hidden="true">-&gt;</span>
+        </Link>
+      </div>
+
+      <div className={styles.sponsorLogoGrid}>
+        {SPONSOR_SLOTS.map((slot, index) => (
+          <SponsorLogoCard key={index} {...slot} />
+        ))}
+      </div>
+    </div>
+  );
+}
+
+export default function HomepageCommunity(): ReactNode {
+  const contributors = useGitHubContributors();
+
+  return (
+    <section id="community" className={styles.section}>
+      <div className="container">
+        <div className={styles.sectionHead}>
+          <div className={styles.sectionTag}>
+            <Translate id="community.tag">COMMUNITY</Translate>
+          </div>
+          <Heading as="h2" className={styles.sectionTitle}>
+            <Translate id="community.title">Built in the open, ready for long-term operators</Translate>
+          </Heading>
+          <p className={styles.sectionSubtitle}>
+            <Translate id="community.subtitle">
+              Backup software earns trust through transparent releases, real deployment feedback and a contributor path that stays practical.
+            </Translate>
+          </p>
+        </div>
+
+        <HomepageSponsors />
+
+        <div className={styles.communityGrid}>
+          <div className={styles.panel}>
+            <div className={styles.panelHeader}>
+              <span>
+                <Translate id="community.contributor.kicker">Contributors</Translate>
+              </span>
+              <Link to="https://github.com/Awuqing/BackupX/graphs/contributors">
+                <Translate id="community.contributor.all">View all</Translate>
+              </Link>
+            </div>
+            <div className={styles.panelNote}>
+              <Translate id="community.contributor.source">Loaded from GitHub contributors API in the browser.</Translate>
+            </div>
+            <div className={styles.contributorList}>
+              {contributors.map(contributor => (
+                <ContributorCard key={contributor.login} {...contributor} />
+              ))}
+            </div>
+          </div>
+
+          <div className={styles.panel}>
+            <div className={styles.panelHeader}>
+              <span>
+                <Translate id="community.path.kicker">Contributor paths</Translate>
+              </span>
+            </div>
+            <div className={styles.pathList}>
+              {COMMUNITY_PATHS.map((path, index) => (
+                <Link key={index} className={styles.pathItem} to={path.href}>
+                  <span className={styles.pathIndex}>{String(index + 1).padStart(2, '0')}</span>
+                  <span>
+                    <strong>{path.title}</strong>
+                    <em>{path.description}</em>
+                  </span>
+                </Link>
+              ))}
+            </div>
+          </div>
+        </div>
+      </div>
+    </section>
+  );
+}
--- a/docs-site/src/components/HomepageCommunity/styles.module.css
+++ b/docs-site/src/components/HomepageCommunity/styles.module.css
@@ -0,0 +1,429 @@
+.section {
+  padding: 5.5rem 0 6rem;
+  background:
+    linear-gradient(180deg, rgba(245, 247, 250, 0) 0%, rgba(245, 247, 250, 0.86) 100%),
+    var(--ifm-background-color);
+}
+
+[data-theme='dark'] .section {
+  background:
+    linear-gradient(180deg, rgba(15, 17, 21, 0) 0%, rgba(255, 255, 255, 0.03) 100%),
+    var(--ifm-background-color);
+}
+
+.sectionHead {
+  max-width: 760px;
+  margin: 0 auto 2.5rem;
+  text-align: center;
+}
+
+.sectionTag {
+  display: inline-flex;
+  align-items: center;
+  min-height: 28px;
+  margin-bottom: 1rem;
+  padding: 4px 10px;
+  color: #00a870;
+  background: rgba(0, 180, 42, 0.1);
+  border: 1px solid rgba(0, 180, 42, 0.18);
+  border-radius: 8px;
+  font-size: 12px;
+  font-weight: 750;
+  letter-spacing: 0;
+}
+
+.sectionTitle {
+  margin: 0 0 1rem;
+  color: var(--ifm-heading-color);
+  font-size: 2.35rem;
+  font-weight: 750;
+  letter-spacing: 0;
+  line-height: 1.2;
+}
+
+.sectionSubtitle {
+  margin: 0;
+  color: var(--ifm-color-content-secondary);
+  font-size: 1.04rem;
+  line-height: 1.7;
+}
+
+.sponsorWall {
+  overflow: hidden;
+  margin-bottom: 1rem;
+  background: var(--ifm-background-color);
+  border: 1px solid var(--ifm-color-emphasis-200);
+  border-radius: 8px;
+  box-shadow: 0 12px 28px rgba(29, 33, 41, 0.06);
+}
+
+[data-theme='dark'] .sponsorWall {
+  background: rgba(255, 255, 255, 0.02);
+  border-color: rgba(255, 255, 255, 0.08);
+  box-shadow: none;
+}
+
+.sponsorWallHeader {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+  min-height: 60px;
+  padding: 0 1.25rem;
+  border-bottom: 1px solid var(--ifm-color-emphasis-200);
+}
+
+[data-theme='dark'] .sponsorWallHeader {
+  border-bottom-color: rgba(255, 255, 255, 0.08);
+}
+
+.sponsorWallTitle {
+  position: relative;
+  margin: 0;
+  padding-left: 14px;
+  color: var(--ifm-heading-color);
+  font-size: 1.05rem;
+  font-weight: 750;
+  letter-spacing: 0;
+}
+
+.sponsorWallTitle::before {
+  position: absolute;
+  top: 50%;
+  left: 0;
+  width: 3px;
+  height: 18px;
+  content: "";
+  background: #52c41a;
+  border-radius: 3px;
+  transform: translateY(-50%);
+}
+
+.sponsorWallAction {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  min-height: 36px;
+  padding: 0 12px;
+  color: #52c41a;
+  background: rgba(82, 196, 26, 0.08);
+  border: 1px solid rgba(82, 196, 26, 0.2);
+  border-radius: 8px;
+  font-size: 13px;
+  font-weight: 700;
+  text-decoration: none !important;
+  white-space: nowrap;
+  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
+}
+
+.sponsorWallAction:hover,
+.sponsorWallAction:focus-visible {
+  color: #389e0d;
+  background: rgba(82, 196, 26, 0.14);
+  border-color: #52c41a;
+  transform: translateY(-1px);
+}
+
+.sponsorLogoGrid {
+  display: grid;
+  grid-template-columns: repeat(6, minmax(0, 1fr));
+  background: var(--ifm-color-emphasis-200);
+  gap: 1px;
+  padding: 1px;
+}
+
+[data-theme='dark'] .sponsorLogoGrid {
+  background: rgba(255, 255, 255, 0.08);
+}
+
+.sponsorLogoTile {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 0;
+  min-height: 106px;
+  padding: 14px 10px;
+  flex-direction: column;
+  color: inherit;
+  background: var(--ifm-background-color);
+  text-align: center;
+  text-decoration: none !important;
+  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
+}
+
+[data-theme='dark'] .sponsorLogoTile {
+  background: rgba(15, 17, 21, 0.78);
+}
+
+.sponsorLogoTile:hover,
+.sponsorLogoTile:focus-visible {
+  z-index: 1;
+  color: inherit;
+  background: rgba(82, 196, 26, 0.04);
+  box-shadow: inset 0 0 0 1px rgba(82, 196, 26, 0.5);
+  transform: translateY(-1px);
+}
+
+.sponsorLogoMark {
+  display: block;
+  max-width: 100%;
+  overflow-wrap: anywhere;
+  color: var(--ifm-color-primary);
+  font-size: 1.45rem;
+  font-weight: 850;
+  letter-spacing: 0;
+  line-height: 1.1;
+}
+
+.sponsorLogoTile:nth-child(2n) .sponsorLogoMark {
+  color: #ff7d00;
+}
+
+.sponsorLogoTile:nth-child(3n) .sponsorLogoMark {
+  color: #14c9c9;
+}
+
+.sponsorLogoTile:nth-child(4n) .sponsorLogoMark {
+  color: #722ed1;
+}
+
+.sponsorLogoTile:nth-child(5n) .sponsorLogoMark {
+  color: #52c41a;
+}
+
+.sponsorLogoName {
+  display: block;
+  max-width: 100%;
+  margin-top: 10px;
+  color: var(--ifm-color-content-secondary);
+  font-size: 0.86rem;
+  font-weight: 600;
+  line-height: 1.35;
+}
+
+.panel {
+  background: var(--ifm-background-color);
+  border: 1px solid var(--ifm-color-emphasis-200);
+  border-radius: 8px;
+  box-shadow: 0 12px 28px rgba(29, 33, 41, 0.06);
+}
+
+[data-theme='dark'] .panel {
+  background: rgba(255, 255, 255, 0.02);
+  border-color: rgba(255, 255, 255, 0.08);
+  box-shadow: none;
+}
+
+.communityGrid {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 1rem;
+}
+
+.panel {
+  min-width: 0;
+  padding: 1.25rem;
+}
+
+.panelHeader {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+  margin-bottom: 1rem;
+  color: var(--ifm-color-content-secondary);
+  font-size: 12px;
+  font-weight: 750;
+  letter-spacing: 0;
+  text-transform: uppercase;
+}
+
+.panelHeader a {
+  color: var(--ifm-color-primary);
+  text-decoration: none !important;
+}
+
+.panelNote {
+  margin: -0.35rem 0 1rem;
+  color: var(--ifm-color-content-secondary);
+  font-size: 0.82rem;
+  line-height: 1.5;
+}
+
+.contributorList,
+.pathList {
+  display: grid;
+  gap: 10px;
+}
+
+.contributorCard,
+.pathItem {
+  display: grid;
+  min-width: 0;
+  color: inherit;
+  background: var(--ifm-color-emphasis-100);
+  border: 1px solid var(--ifm-color-emphasis-200);
+  border-radius: 8px;
+  text-decoration: none !important;
+  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
+}
+
+.contributorCard:hover,
+.contributorCard:focus-visible,
+.pathItem:hover,
+.pathItem:focus-visible {
+  color: inherit;
+  background: var(--ifm-background-color);
+  border-color: var(--ifm-color-primary);
+  transform: translateY(-1px);
+}
+
+[data-theme='dark'] .contributorCard,
+[data-theme='dark'] .pathItem {
+  background: rgba(255, 255, 255, 0.03);
+  border-color: rgba(255, 255, 255, 0.08);
+}
+
+.contributorCard {
+  grid-template-columns: auto minmax(0, 1fr);
+  gap: 12px;
+  align-items: center;
+  padding: 12px;
+}
+
+.avatar {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 44px;
+  height: 44px;
+  color: #fff;
+  background: #165dff;
+  border-radius: 8px;
+  font-size: 13px;
+  font-weight: 800;
+}
+
+.avatarImage {
+  width: 44px;
+  height: 44px;
+  border: 1px solid var(--ifm-color-emphasis-200);
+  border-radius: 8px;
+  object-fit: cover;
+}
+
+.contributorCard:nth-child(2) .avatar {
+  background: #00a870;
+}
+
+.contributorCard:nth-child(3) .avatar {
+  background: #ff7d00;
+}
+
+.contributorBody {
+  display: grid;
+  min-width: 0;
+  gap: 2px;
+}
+
+.contributorBody strong {
+  color: var(--ifm-heading-color);
+  font-size: 0.98rem;
+}
+
+.contributorBody span {
+  color: var(--ifm-color-content);
+  font-size: 0.88rem;
+}
+
+.contributorBody em,
+.pathItem em {
+  color: var(--ifm-color-content-secondary);
+  font-size: 0.82rem;
+  font-style: normal;
+  line-height: 1.45;
+}
+
+.pathItem {
+  grid-template-columns: auto minmax(0, 1fr);
+  gap: 12px;
+  padding: 14px;
+}
+
+.pathIndex {
+  color: var(--ifm-color-primary);
+  font-family: var(--ifm-font-family-monospace);
+  font-size: 0.86rem;
+  font-weight: 800;
+}
+
+.pathItem strong {
+  display: block;
+  margin-bottom: 4px;
+  color: var(--ifm-heading-color);
+  font-size: 0.96rem;
+}
+
+@media (max-width: 996px) {
+  .section {
+    padding: 4rem 0;
+  }
+
+  .sectionTitle {
+    font-size: 2rem;
+  }
+
+  .communityGrid {
+    grid-template-columns: 1fr;
+  }
+
+  .sponsorLogoGrid {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+
+  .sponsorLogoTile {
+    min-height: 96px;
+  }
+}
+
+@media (max-width: 640px) {
+  .section {
+    padding: 3.25rem 0;
+  }
+
+  .sectionTitle {
+    font-size: 1.75rem;
+  }
+
+  .sponsorWallHeader {
+    display: grid;
+    min-height: auto;
+    padding: 1rem;
+  }
+
+  .sponsorWallAction {
+    justify-content: center;
+    width: 100%;
+  }
+
+  .sponsorLogoGrid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+  .sponsorLogoMark {
+    font-size: 1.15rem;
+  }
+
+  .panel {
+    padding: 1rem;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .sponsorWallAction,
+  .sponsorLogoTile,
+  .contributorCard,
+  .pathItem {
+    transition: none;
+  }
+}
--- a/docs-site/src/components/HomepageFeatures/index.tsx
+++ b/docs-site/src/components/HomepageFeatures/index.tsx
@@ -129,7 +129,7 @@ function Feature({title, description, icon, link}: FeatureItem) {
      {link && (
        <span className={styles.featureLink}>
          <Translate id="feat.learnMore">Learn more</Translate>
-          <span className={styles.featureArrow} aria-hidden="true">→</span>
+          <span className={styles.featureArrow} aria-hidden="true">-&gt;</span>
        </span>
      )}
    </>
--- a/docs-site/src/components/HomepageFeatures/styles.module.css
+++ b/docs-site/src/components/HomepageFeatures/styles.module.css
@@ -1,5 +1,6 @@
 .section {
-  padding: 6rem 0 4rem;
+  padding: 5.5rem 0 4.25rem;
+  background: var(--ifm-background-color);
 }

 .sectionHead {
@@ -9,14 +10,17 @@
 }

 .sectionTag {
-  display: inline-block;
+  display: inline-flex;
+  align-items: center;
+  min-height: 28px;
  font-size: 12px;
-  font-weight: 600;
-  letter-spacing: 0.15em;
+  font-weight: 750;
+  letter-spacing: 0;
  color: var(--ifm-color-primary);
  padding: 4px 12px;
  background: rgba(22, 93, 255, 0.08);
-  border-radius: 4px;
+  border: 1px solid rgba(22, 93, 255, 0.16);
+  border-radius: 8px;
  margin-bottom: 1rem;
 }

@@ -26,10 +30,10 @@
 }

 .sectionTitle {
-  font-size: clamp(1.8rem, 3vw, 2.5rem);
+  font-size: 2.35rem;
  line-height: 1.2;
-  letter-spacing: -0.02em;
-  font-weight: 700;
+  letter-spacing: 0;
+  font-weight: 750;
  margin: 0 0 1rem;
  color: var(--ifm-heading-color);
 }
@@ -51,6 +55,9 @@
  .section {
    padding: 3.5rem 0 2rem;
  }
+  .sectionTitle {
+    font-size: 2rem;
+  }
  .grid {
    grid-template-columns: 1fr;
  }
@@ -70,7 +77,7 @@
  padding: 1.75rem;
  background: var(--ifm-background-color);
  border: 1px solid var(--ifm-color-emphasis-200);
-  border-radius: 12px;
+  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none !important;
  color: inherit;
@@ -78,7 +85,7 @@
 }

 .featureCardLink:hover {
-  transform: translateY(-3px);
+  transform: translateY(-2px);
  border-color: var(--ifm-color-primary);
  box-shadow: 0 12px 30px -8px rgba(22, 93, 255, 0.18);
  color: inherit;
@@ -99,26 +106,26 @@
 .iconWrap {
  width: 48px;
  height: 48px;
-  border-radius: 10px;
+  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
-  background: linear-gradient(135deg, rgba(22, 93, 255, 0.1) 0%, rgba(143, 75, 255, 0.08) 100%);
+  background: linear-gradient(135deg, rgba(22, 93, 255, 0.1) 0%, rgba(20, 201, 201, 0.12) 100%);
  color: var(--ifm-color-primary);
  margin-bottom: 1.25rem;
 }

 [data-theme='dark'] .iconWrap {
-  background: linear-gradient(135deg, rgba(96, 126, 255, 0.15) 0%, rgba(143, 75, 255, 0.12) 100%);
+  background: linear-gradient(135deg, rgba(96, 126, 255, 0.15) 0%, rgba(20, 201, 201, 0.12) 100%);
  color: var(--ifm-color-primary-lighter);
 }

 .featureTitle {
  font-size: 1.15rem;
-  font-weight: 600;
+  font-weight: 700;
  margin: 0 0 0.6rem;
  color: var(--ifm-heading-color);
-  letter-spacing: -0.01em;
+  letter-spacing: 0;
 }

 .featureDesc {
@@ -146,3 +153,17 @@
 .featureCardLink:hover .featureArrow {
  transform: translateX(4px);
 }
+
+@media (max-width: 640px) {
+  .sectionTitle {
+    font-size: 1.75rem;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .featureCard,
+  .featureCardLink,
+  .featureArrow {
+    transition: none;
+  }
+}
--- a/docs-site/src/components/HomepageShowcase/index.tsx
+++ b/docs-site/src/components/HomepageShowcase/index.tsx
@@ -110,7 +110,7 @@ export default function HomepageShowcase(): ReactNode {
            <p className={styles.captionDesc}>{current.description}</p>
            <Link to="/docs/getting-started/quick-start" className={styles.captionLink}>
              <Translate id="showcase.cta">Explore the docs</Translate>
-              <span aria-hidden="true"> →</span>
+              <span aria-hidden="true"> -&gt;</span>
            </Link>
          </div>
        </div>
--- a/docs-site/src/components/HomepageShowcase/styles.module.css
+++ b/docs-site/src/components/HomepageShowcase/styles.module.css
@@ -1,10 +1,14 @@
 .section {
-  padding: 4rem 0 6rem;
-  background: linear-gradient(180deg, transparent 0%, rgba(22, 93, 255, 0.03) 100%);
+  padding: 4.5rem 0 5.5rem;
+  background:
+    linear-gradient(180deg, rgba(245, 247, 250, 0) 0%, rgba(245, 247, 250, 0.72) 100%),
+    var(--ifm-background-color);
 }

 [data-theme='dark'] .section {
-  background: linear-gradient(180deg, transparent 0%, rgba(64, 128, 255, 0.04) 100%);
+  background:
+    linear-gradient(180deg, rgba(15, 17, 21, 0) 0%, rgba(255, 255, 255, 0.03) 100%),
+    var(--ifm-background-color);
 }

 .sectionHead {
@@ -14,26 +18,30 @@
 }

 .sectionTag {
-  display: inline-block;
+  display: inline-flex;
+  align-items: center;
+  min-height: 28px;
  font-size: 12px;
-  font-weight: 600;
-  letter-spacing: 0.15em;
-  color: #8f4bff;
+  font-weight: 750;
+  letter-spacing: 0;
+  color: #0e7490;
  padding: 4px 12px;
-  background: rgba(143, 75, 255, 0.08);
-  border-radius: 4px;
+  background: rgba(20, 201, 201, 0.1);
+  border: 1px solid rgba(20, 201, 201, 0.2);
+  border-radius: 8px;
  margin-bottom: 1rem;
 }

 [data-theme='dark'] .sectionTag {
-  background: rgba(143, 75, 255, 0.18);
+  background: rgba(20, 201, 201, 0.16);
+  color: #67e8f9;
 }

 .sectionTitle {
-  font-size: clamp(1.8rem, 3vw, 2.5rem);
+  font-size: 2.35rem;
  line-height: 1.2;
-  letter-spacing: -0.02em;
-  font-weight: 700;
+  letter-spacing: 0;
+  font-weight: 750;
  margin: 0 0 1rem;
  color: var(--ifm-heading-color);
 }
@@ -49,34 +57,39 @@
 .tabs {
  display: flex;
  justify-content: center;
-  gap: 8px;
+  gap: 6px;
  margin-bottom: 2rem;
  flex-wrap: wrap;
+  padding: 6px;
+  background: var(--ifm-color-emphasis-100);
+  border: 1px solid var(--ifm-color-emphasis-200);
+  border-radius: 8px;
 }

 .tabBtn {
+  min-height: 40px;
  padding: 8px 18px;
  background: transparent;
-  border: 1px solid var(--ifm-color-emphasis-300);
-  border-radius: 999px;
+  border: 1px solid transparent;
+  border-radius: 8px;
  color: var(--ifm-color-content-secondary);
  font-size: 14px;
-  font-weight: 500;
+  font-weight: 650;
  cursor: pointer;
-  transition: all 0.2s ease;
+  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
 }

 .tabBtn:hover {
  color: var(--ifm-color-primary);
-  border-color: var(--ifm-color-primary);
+  background: var(--ifm-background-color);
 }

 .tabBtnActive,
 .tabBtnActive:hover {
-  background: linear-gradient(90deg, #165dff 0%, #4080ff 100%);
-  color: #fff !important;
-  border-color: transparent;
-  box-shadow: 0 4px 14px rgba(22, 93, 255, 0.3);
+  background: var(--ifm-background-color);
+  color: var(--ifm-color-primary) !important;
+  border-color: rgba(22, 93, 255, 0.18);
+  box-shadow: 0 6px 16px rgba(22, 93, 255, 0.12);
 }

 /* Stage */
@@ -96,10 +109,10 @@

 .browser {
  background: var(--ifm-background-color);
-  border-radius: 12px;
+  border-radius: 8px;
  overflow: hidden;
  box-shadow:
-    0 30px 60px -20px rgba(22, 93, 255, 0.25),
+    0 24px 58px -22px rgba(22, 93, 255, 0.28),
    0 0 0 1px var(--ifm-color-emphasis-200);
 }

@@ -137,7 +150,7 @@
  margin: 0 auto;
  padding: 3px 14px;
  background: var(--ifm-background-color);
-  border-radius: 999px;
+  border-radius: 8px;
  font-size: 12px;
  color: var(--ifm-color-content-secondary);
  font-family: 'SFMono-Regular', Menlo, monospace;
@@ -169,8 +182,8 @@
 .captionTitle {
  font-size: 1.7rem;
  line-height: 1.2;
-  letter-spacing: -0.02em;
-  font-weight: 700;
+  letter-spacing: 0;
+  font-weight: 750;
  margin: 0 0 1rem;
  color: var(--ifm-heading-color);
 }
@@ -186,11 +199,49 @@
  display: inline-flex;
  align-items: center;
  gap: 4px;
-  font-weight: 500;
+  min-height: 40px;
+  padding: 0 12px;
+  border: 1px solid rgba(22, 93, 255, 0.18);
+  border-radius: 8px;
+  font-weight: 650;
  color: var(--ifm-color-primary);
  text-decoration: none !important;
+  transition: border-color 0.2s ease, background 0.2s ease;
 }

 .captionLink:hover {
  color: var(--ifm-color-primary-dark);
+  background: rgba(22, 93, 255, 0.06);
+  border-color: var(--ifm-color-primary);
+}
+
+@media (max-width: 996px) {
+  .sectionTitle {
+    font-size: 2rem;
+  }
+}
+
+@media (max-width: 640px) {
+  .section {
+    padding: 3.25rem 0 4rem;
+  }
+
+  .sectionTitle {
+    font-size: 1.75rem;
+  }
+
+  .tabs {
+    justify-content: stretch;
+  }
+
+  .tabBtn {
+    flex: 1 1 130px;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .tabBtn,
+  .captionLink {
+    transition: none;
+  }
 }
--- a/docs-site/src/css/custom.css
+++ b/docs-site/src/css/custom.css
@@ -16,14 +16,15 @@
  /* Surfaces */
  --ifm-background-color: #ffffff;
  --ifm-background-surface-color: #ffffff;
-  --ifm-color-emphasis-100: #f7f9fc;
-  --ifm-color-emphasis-200: #eef1f6;
-  --ifm-color-emphasis-300: #dde3ec;
+  --ifm-color-emphasis-100: #f5f7fa;
+  --ifm-color-emphasis-200: #e5e6eb;
+  --ifm-color-emphasis-300: #c9cdd4;
+  --ifm-color-emphasis-400: #a9aeb8;

  /* Typography */
  --ifm-font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --ifm-font-family-monospace: 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
-  --ifm-heading-font-weight: 600;
+  --ifm-heading-font-weight: 700;
  --ifm-code-font-size: 92%;
  --ifm-h1-font-size: 2.25rem;
  --ifm-h2-font-size: 1.75rem;
@@ -33,10 +34,11 @@
  --ifm-color-content: #1d2129;
  --ifm-color-content-secondary: #4e5969;
  --ifm-heading-color: #1d2129;
+  --ifm-global-radius: 8px;

  /* Navbar */
  --ifm-navbar-height: 64px;
-  --ifm-navbar-background-color: rgba(255, 255, 255, 0.82);
+  --ifm-navbar-background-color: rgba(255, 255, 255, 0.9);
  --ifm-navbar-link-color: #4e5969;
  --ifm-navbar-link-hover-color: var(--ifm-color-primary);

@@ -64,15 +66,16 @@

  --ifm-background-color: #0f1115;
  --ifm-background-surface-color: #16181d;
-  --ifm-color-emphasis-100: #1a1d23;
-  --ifm-color-emphasis-200: #23272f;
-  --ifm-color-emphasis-300: #2e343d;
+  --ifm-color-emphasis-100: #1d2129;
+  --ifm-color-emphasis-200: #272e3b;
+  --ifm-color-emphasis-300: #384252;
+  --ifm-color-emphasis-400: #4e5969;

  --ifm-color-content: #e6e9ef;
  --ifm-color-content-secondary: #9aa3b2;
  --ifm-heading-color: #f0f2f5;

-  --ifm-navbar-background-color: rgba(15, 17, 21, 0.82);
+  --ifm-navbar-background-color: rgba(15, 17, 21, 0.9);
  --ifm-navbar-link-color: #c9d1db;

  --ifm-menu-color: #c9d1db;
@@ -97,7 +100,7 @@

 .navbar__title {
  font-weight: 700;
-  letter-spacing: -0.01em;
+  letter-spacing: 0;
 }

 .navbar__link {
@@ -105,10 +108,26 @@
  font-size: 14px;
 }

+.navbar__link,
+.button,
+a {
+  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
+}
+
+.button {
+  border-radius: 8px;
+  font-weight: 650;
+}
+
+:focus-visible {
+  outline: 2px solid var(--ifm-color-primary);
+  outline-offset: 2px;
+}
+
 /* Sidebar tweaks */
 .menu__link {
  font-size: 14px;
-  border-radius: 6px;
+  border-radius: 8px;
  padding: 6px 10px;
  line-height: 1.4;
 }
@@ -226,9 +245,20 @@ code {
 }

 ::-webkit-scrollbar-thumb:hover {
-  background: var(--ifm-color-emphasis-400, #adb5bd);
+  background: var(--ifm-color-emphasis-400);
 }

 [data-theme='dark'] ::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
 }
+
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    scroll-behavior: auto !important;
+    transition-duration: 0.01ms !important;
+  }
+}
--- a/docs-site/src/pages/community.tsx
+++ b/docs-site/src/pages/community.tsx
@@ -0,0 +1,19 @@
+import type {ReactNode} from 'react';
+import {translate} from '@docusaurus/Translate';
+import Layout from '@theme/Layout';
+import HomepageCommunity from '@site/src/components/HomepageCommunity';
+
+export default function Community(): ReactNode {
+  return (
+    <Layout
+      title={translate({id: 'community.pageTitle', message: 'Community, sponsors and contributors'})}
+      description={translate({
+        id: 'community.pageDescription',
+        message: 'Sponsor BackupX, meet contributors, and find practical ways to contribute.',
+      })}>
+      <main>
+        <HomepageCommunity />
+      </main>
+    </Layout>
+  );
+}
--- a/docs-site/src/pages/index.module.css
+++ b/docs-site/src/pages/index.module.css
@@ -1,48 +1,42 @@
-/* ── Hero ───────────────────────────────────────────── */
+/* Hero */
 .hero {
  position: relative;
-  padding: 7rem 0 6rem;
  overflow: hidden;
-  background: var(--bx-hero-bg);
+  padding: 7rem 0 5.5rem;
+  background:
+    linear-gradient(180deg, rgba(22, 93, 255, 0.08) 0%, rgba(255, 255, 255, 0) 72%),
+    linear-gradient(90deg, rgba(20, 201, 201, 0.08) 0%, rgba(250, 173, 20, 0.08) 100%),
+    var(--ifm-background-color);
 }

-.heroBg {
+.hero::before {
  position: absolute;
  inset: 0;
-  background:
-    radial-gradient(circle at 15% 20%, rgba(104, 127, 255, 0.18) 0%, transparent 45%),
-    radial-gradient(circle at 85% 70%, rgba(22, 93, 255, 0.15) 0%, transparent 50%),
-    linear-gradient(180deg, #f7f9ff 0%, #ffffff 100%);
-  z-index: 0;
+  content: "";
+  pointer-events: none;
+  background-image:
+    linear-gradient(rgba(22, 93, 255, 0.06) 1px, transparent 1px),
+    linear-gradient(90deg, rgba(22, 93, 255, 0.06) 1px, transparent 1px);
+  background-size: 44px 44px;
+  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
 }

-[data-theme='dark'] .heroBg {
+[data-theme='dark'] .hero {
  background:
-    radial-gradient(circle at 15% 20%, rgba(96, 126, 255, 0.22) 0%, transparent 45%),
-    radial-gradient(circle at 85% 70%, rgba(118, 70, 255, 0.18) 0%, transparent 50%),
-    linear-gradient(180deg, #0f1115 0%, #0b0d10 100%);
+    linear-gradient(180deg, rgba(64, 128, 255, 0.16) 0%, rgba(15, 17, 21, 0) 72%),
+    linear-gradient(90deg, rgba(20, 201, 201, 0.1) 0%, rgba(250, 173, 20, 0.08) 100%),
+    var(--ifm-background-color);
 }

 .heroInner {
  position: relative;
  z-index: 1;
  display: grid;
-  grid-template-columns: 1.1fr 1fr;
+  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  gap: 4rem;
  align-items: center;
 }

-@media (max-width: 996px) {
-  .hero {
-    padding: 4rem 0 3rem;
-  }
-  .heroInner {
-    grid-template-columns: 1fr;
-    gap: 2.5rem;
-    text-align: left;
-  }
-}
-
 .heroContent {
  display: flex;
  flex-direction: column;
@@ -54,137 +48,144 @@
  display: inline-flex;
  align-items: center;
  gap: 8px;
-  padding: 4px 14px;
-  background: rgba(22, 93, 255, 0.08);
-  border: 1px solid rgba(22, 93, 255, 0.15);
-  border-radius: 999px;
-  font-size: 13px;
+  min-height: 32px;
+  padding: 5px 12px;
  color: var(--ifm-color-primary);
-  font-weight: 500;
+  background: rgba(22, 93, 255, 0.09);
+  border: 1px solid rgba(22, 93, 255, 0.2);
+  border-radius: 8px;
+  font-size: 13px;
+  font-weight: 600;
 }

 [data-theme='dark'] .badge {
-  background: rgba(96, 126, 255, 0.15);
-  border-color: rgba(96, 126, 255, 0.3);
+  background: rgba(64, 128, 255, 0.16);
+  border-color: rgba(64, 128, 255, 0.3);
  color: var(--ifm-color-primary-lighter);
 }

 .badgeDot {
-  width: 6px;
-  height: 6px;
-  background: var(--ifm-color-primary);
+  width: 7px;
+  height: 7px;
+  background: #00b42a;
  border-radius: 50%;
-  box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.18);
-  animation: pulse 2s infinite;
-}
-
-@keyframes pulse {
-  0%, 100% { opacity: 1; }
-  50% { opacity: 0.5; }
+  box-shadow: 0 0 0 4px rgba(0, 180, 42, 0.12);
 }

 .heroTitle {
-  font-size: clamp(2.25rem, 4vw, 3.4rem);
-  line-height: 1.15;
-  letter-spacing: -0.025em;
-  font-weight: 700;
  margin: 0;
  color: var(--ifm-heading-color);
+  font-size: 3.45rem;
+  font-weight: 750;
+  letter-spacing: 0;
+  line-height: 1.08;
 }

 .heroTitleAccent {
  display: block;
-  background: linear-gradient(90deg, #4080ff 0%, #8f4bff 100%);
-  -webkit-background-clip: text;
-  -webkit-text-fill-color: transparent;
-  background-clip: text;
-  margin-top: 6px;
+  margin-top: 8px;
+  color: var(--ifm-color-primary);
 }

 .heroSubtitle {
-  font-size: 1.15rem;
-  line-height: 1.65;
-  color: var(--ifm-color-content-secondary);
-  max-width: 540px;
+  max-width: 640px;
  margin: 0;
+  color: var(--ifm-color-content-secondary);
+  font-size: 1.15rem;
+  line-height: 1.72;
 }

 .actions {
  display: flex;
+  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
-  flex-wrap: wrap;
+}
+
+.primaryBtn,
+.secondaryBtn {
+  min-height: 46px;
+  border-radius: 8px;
+  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
 }

 .primaryBtn {
-  background: linear-gradient(90deg, #165dff 0%, #4080ff 100%);
-  border: none;
-  color: #fff;
  display: inline-flex;
  align-items: center;
-  gap: 6px;
-  font-weight: 600;
-  box-shadow: 0 6px 20px rgba(22, 93, 255, 0.3);
-  transition: transform 0.2s ease, box-shadow 0.2s ease;
+  gap: 8px;
+  color: #fff;
+  background: #165dff;
+  border: 1px solid #165dff;
+  box-shadow: 0 10px 24px rgba(22, 93, 255, 0.24);
+  font-weight: 650;
 }

-.primaryBtn:hover {
-  transform: translateY(-1px);
-  box-shadow: 0 10px 25px rgba(22, 93, 255, 0.4);
+.primaryBtn:hover,
+.primaryBtn:focus-visible {
  color: #fff;
+  background: #0e4fe6;
+  border-color: #0e4fe6;
+  box-shadow: 0 14px 30px rgba(22, 93, 255, 0.3);
+  transform: translateY(-1px);
 }

 .btnArrow {
  transition: transform 0.2s ease;
 }

-.primaryBtn:hover .btnArrow {
-  transform: translateX(4px);
+.primaryBtn:hover .btnArrow,
+.primaryBtn:focus-visible .btnArrow {
+  transform: translateX(3px);
 }

 .secondaryBtn {
-  background: var(--ifm-background-color);
-  border: 1px solid var(--ifm-color-emphasis-300);
-  color: var(--ifm-font-color-base);
  display: inline-flex;
  align-items: center;
-  font-weight: 500;
-  transition: all 0.2s ease;
+  color: var(--ifm-font-color-base);
+  background: var(--ifm-background-color);
+  border: 1px solid var(--ifm-color-emphasis-300);
+  font-weight: 600;
 }

-.secondaryBtn:hover {
-  border-color: var(--ifm-color-primary);
+.secondaryBtn:hover,
+.secondaryBtn:focus-visible {
  color: var(--ifm-color-primary);
+  border-color: var(--ifm-color-primary);
  background: var(--ifm-background-color);
+  transform: translateY(-1px);
 }

 .metrics {
  display: flex;
  align-items: center;
-  gap: 1.75rem;
-  padding-top: 1.5rem;
+  gap: 1.5rem;
  margin-top: 0.5rem;
+  padding-top: 1.25rem;
 }

 .metric {
  display: flex;
+  min-width: 0;
  flex-direction: column;
-  gap: 2px;
+  gap: 4px;
 }

 .metricValue {
-  font-size: 1.6rem;
-  font-weight: 700;
  color: var(--ifm-heading-color);
+  font-size: 1.35rem;
+  font-weight: 750;
+  letter-spacing: 0;
  line-height: 1.1;
-  letter-spacing: -0.02em;
+  white-space: nowrap;
 }

 .metricLabel {
-  font-size: 12px;
  color: var(--ifm-color-content-secondary);
+  font-size: 12px;
+  font-weight: 600;
+  letter-spacing: 0;
+  line-height: 1.35;
  text-transform: uppercase;
-  letter-spacing: 0.05em;
 }

 .metricDivider {
@@ -193,81 +194,277 @@
  background: var(--ifm-color-emphasis-300);
 }

-/* ── Code window (macOS-style) ─────────────────────── */
-.heroCode {
-  position: relative;
+/* Product visual */
+.heroVisual {
+  display: grid;
+  gap: 1rem;
 }

-.codeWindow {
-  background: #0f1622;
-  border-radius: 12px;
-  box-shadow:
-    0 20px 50px -10px rgba(15, 22, 34, 0.35),
-    0 0 0 1px rgba(255, 255, 255, 0.05);
+.consolePanel {
  overflow: hidden;
-  border: 1px solid rgba(255, 255, 255, 0.06);
+  background: rgba(255, 255, 255, 0.92);
+  border: 1px solid rgba(22, 93, 255, 0.16);
+  border-radius: 8px;
+  box-shadow: 0 24px 60px rgba(29, 33, 41, 0.12);
 }

-[data-theme='light'] .codeWindow {
-  box-shadow: 0 20px 50px -10px rgba(22, 93, 255, 0.2), 0 0 0 1px rgba(22, 93, 255, 0.06);
+[data-theme='dark'] .consolePanel {
+  background: rgba(22, 24, 29, 0.9);
+  border-color: rgba(255, 255, 255, 0.08);
+  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
 }

-.codeHeader {
+.consoleHeader {
  display: flex;
-  align-items: center;
-  gap: 6px;
-  padding: 10px 14px;
-  background: #161f2e;
-  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 1rem;
+  padding: 1.25rem;
+  border-bottom: 1px solid var(--ifm-color-emphasis-200);
 }

-.codeDot {
-  width: 11px;
-  height: 11px;
-  border-radius: 50%;
+[data-theme='dark'] .consoleHeader {
+  border-bottom-color: rgba(255, 255, 255, 0.08);
 }

-.codeDotRed { background: #ff5f56; }
-.codeDotYellow { background: #ffbd2e; }
-.codeDotGreen { background: #27c93f; }
+.consoleHeader strong {
+  display: block;
+  margin-top: 4px;
+  color: var(--ifm-heading-color);
+  font-size: 1.2rem;
+}

-.codeTitle {
-  margin-left: auto;
-  font-size: 11px;
-  color: #7b8696;
-  letter-spacing: 0.05em;
+.consoleEyebrow {
+  color: var(--ifm-color-content-secondary);
+  font-size: 12px;
+  font-weight: 650;
+  letter-spacing: 0;
  text-transform: uppercase;
 }

-.codeBody {
-  margin: 0;
-  padding: 18px 20px;
-  font-family: 'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
-  font-size: 13px;
-  line-height: 1.65;
-  color: #e1e7ef;
-  background: transparent;
+.consoleStatus {
+  display: inline-flex;
+  align-items: center;
+  min-height: 28px;
+  padding: 4px 10px;
+  color: #00a870;
+  background: rgba(0, 180, 42, 0.1);
+  border: 1px solid rgba(0, 180, 42, 0.2);
+  border-radius: 8px;
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.consoleGrid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  border-bottom: 1px solid var(--ifm-color-emphasis-200);
+}
+
+[data-theme='dark'] .consoleGrid {
+  border-bottom-color: rgba(255, 255, 255, 0.08);
+}
+
+.consoleGrid > div {
+  min-width: 0;
+  padding: 1.1rem 1.25rem;
+  border-right: 1px solid var(--ifm-color-emphasis-200);
+}
+
+[data-theme='dark'] .consoleGrid > div {
+  border-right-color: rgba(255, 255, 255, 0.08);
+}
+
+.consoleGrid > div:last-child {
+  border-right: 0;
+}
+
+.consoleGrid strong {
+  display: block;
+  margin-top: 6px;
+  color: var(--ifm-heading-color);
+  font-size: 1.45rem;
+  line-height: 1.1;
+}
+
+.consoleLabel {
+  display: block;
+  color: var(--ifm-color-content-secondary);
+  font-size: 12px;
+  font-weight: 650;
+}
+
+.timeline {
+  display: grid;
+}
+
+.timelineRow {
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  gap: 12px;
+  align-items: center;
+  padding: 1rem 1.25rem;
+  border-bottom: 1px solid var(--ifm-color-emphasis-200);
+}
+
+[data-theme='dark'] .timelineRow {
+  border-bottom-color: rgba(255, 255, 255, 0.08);
+}
+
+.timelineRow:last-child {
+  border-bottom: 0;
+}
+
+.timelineRow strong,
+.timelineRow span {
+  display: block;
+}
+
+.timelineRow strong {
+  color: var(--ifm-heading-color);
+  font-size: 0.95rem;
+  font-weight: 700;
+}
+
+.timelineRow span {
+  color: var(--ifm-color-content-secondary);
+  font-size: 0.85rem;
+  line-height: 1.5;
+}
+
+.timelineRow em {
+  color: var(--ifm-color-content-secondary);
+  font-size: 0.8rem;
+  font-style: normal;
+  font-weight: 650;
+  white-space: nowrap;
+}
+
+.timelineDotOk,
+.timelineDotInfo,
+.timelineDotWarn {
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+}
+
+.timelineDotOk {
+  background: #00b42a;
+}
+
+.timelineDotInfo {
+  background: #165dff;
+}
+
+.timelineDotWarn {
+  background: #ff7d00;
+}
+
+.commandCard {
+  display: grid;
+  gap: 8px;
+  padding: 1rem 1.1rem;
+  background: #111827;
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  border-radius: 8px;
+  box-shadow: 0 16px 34px rgba(17, 24, 39, 0.18);
+}
+
+.commandTitle {
+  color: #9ca3af;
+  font-size: 12px;
+  font-weight: 650;
+  letter-spacing: 0;
+  text-transform: uppercase;
+}
+
+.commandCard code {
  overflow-x: auto;
-}
-
-.codeBody code {
+  color: #e5e7eb;
  background: transparent;
-  padding: 0;
  border: 0;
-  color: inherit;
+  padding: 0;
+  font-size: 13px;
+  white-space: nowrap;
 }

-.codePrompt {
-  color: #4080ff;
-  margin-right: 6px;
-  user-select: none;
+@media (max-width: 996px) {
+  .hero {
+    padding: 4.5rem 0 3.5rem;
+  }
+
+  .heroInner {
+    grid-template-columns: 1fr;
+    gap: 2.25rem;
+  }
+
+  .heroTitle {
+    font-size: 2.45rem;
+  }
 }

-.codeComment {
-  color: #6e7889;
-  font-style: italic;
+@media (max-width: 640px) {
+  .hero {
+    padding: 3.75rem 0 2.75rem;
+  }
+
+  .heroTitle {
+    font-size: 2.05rem;
+  }
+
+  .heroSubtitle {
+    font-size: 1rem;
+  }
+
+  .actions {
+    width: 100%;
+  }
+
+  .primaryBtn,
+  .secondaryBtn {
+    width: 100%;
+    justify-content: center;
+  }
+
+  .metrics {
+    width: 100%;
+    align-items: stretch;
+    gap: 0.85rem;
+    flex-direction: column;
+  }
+
+  .metricDivider {
+    width: 100%;
+    height: 1px;
+  }
+
+  .consoleHeader,
+  .timelineRow {
+    padding: 1rem;
+  }
+
+  .consoleGrid {
+    grid-template-columns: 1fr;
+  }
+
+  .consoleGrid > div {
+    border-right: 0;
+    border-bottom: 1px solid var(--ifm-color-emphasis-200);
+  }
+
+  .consoleGrid > div:last-child {
+    border-bottom: 0;
+  }
+
+  [data-theme='dark'] .consoleGrid > div {
+    border-bottom-color: rgba(255, 255, 255, 0.08);
+  }
 }

-.codeString {
-  color: #82d1ff;
+@media (prefers-reduced-motion: reduce) {
+  .primaryBtn,
+  .secondaryBtn,
+  .btnArrow {
+    transition: none;
+  }
 }
--- a/docs-site/src/pages/index.tsx
+++ b/docs-site/src/pages/index.tsx
@@ -7,34 +7,34 @@ import Layout from '@theme/Layout';
 import Heading from '@theme/Heading';
 import HomepageFeatures from '@site/src/components/HomepageFeatures';
 import HomepageShowcase from '@site/src/components/HomepageShowcase';
+import HomepageCommunity from '@site/src/components/HomepageCommunity';

 import styles from './index.module.css';

 function HomepageHeader() {
  return (
    <header className={styles.hero}>
-      <div className={styles.heroBg} aria-hidden="true" />
      <div className={clsx('container', styles.heroInner)}>
        <div className={styles.heroContent}>
          <div className={styles.badge}>
            <span className={styles.badgeDot} />
-            <Translate id="home.badge">Open-source · v1.6.0</Translate>
+            <Translate id="home.badge">Open-source backup control plane · v2.2.1</Translate>
          </div>
          <Heading as="h1" className={styles.heroTitle}>
-            <Translate id="home.title.part1">Self-hosted backup management</Translate>
+            <Translate id="home.title.part1">Backup orchestration</Translate>
            <span className={styles.heroTitleAccent}>
-              <Translate id="home.title.part2">for every server.</Translate>
+              <Translate id="home.title.part2">for self-hosted servers.</Translate>
            </span>
          </Heading>
          <p className={styles.heroSubtitle}>
            <Translate id="home.tagline">
-              One binary, one command. File / database / SAP HANA backups routed to 70+ storage backends.
+              Run file, database, SAP HANA and remote-node backups from one clean console. Keep the control plane yours, keep the storage flexible.
            </Translate>
          </p>
          <div className={styles.actions}>
            <Link className={clsx('button button--primary button--lg', styles.primaryBtn)} to="/docs/getting-started/quick-start">
              <Translate id="home.getStarted">Get Started</Translate>
-              <span className={styles.btnArrow} aria-hidden="true">→</span>
+              <span className={styles.btnArrow} aria-hidden="true">-&gt;</span>
            </Link>
            <Link className={clsx('button button--lg', styles.secondaryBtn)} to="https://github.com/Awuqing/BackupX">
              <svg width="18" height="18" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true" style={{marginRight: 6}}>
@@ -52,9 +52,9 @@ function HomepageHeader() {
            </div>
            <div className={styles.metricDivider} />
            <div className={styles.metric}>
-              <div className={styles.metricValue}>5</div>
+              <div className={styles.metricValue}>Agent</div>
              <div className={styles.metricLabel}>
-                <Translate id="home.metric.backupTypes">Backup types</Translate>
+                <Translate id="home.metric.backupTypes">Remote execution</Translate>
              </div>
            </div>
            <div className={styles.metricDivider} />
@@ -66,29 +66,85 @@ function HomepageHeader() {
            </div>
          </div>
        </div>
-        <div className={styles.heroCode}>
-          <div className={styles.codeWindow}>
-            <div className={styles.codeHeader}>
-              <span className={clsx(styles.codeDot, styles.codeDotRed)} />
-              <span className={clsx(styles.codeDot, styles.codeDotYellow)} />
-              <span className={clsx(styles.codeDot, styles.codeDotGreen)} />
-              <span className={styles.codeTitle}>bash</span>
+        <div className={styles.heroVisual}>
+          <div className={styles.consolePanel}>
+            <div className={styles.consoleHeader}>
+              <div>
+                <span className={styles.consoleEyebrow}>
+                  <Translate id="home.visual.eyebrow">BackupX Console</Translate>
+                </span>
+                <strong>
+                  <Translate id="home.visual.title">Operations overview</Translate>
+                </strong>
+              </div>
+              <span className={styles.consoleStatus}>
+                <Translate id="home.visual.status">Healthy</Translate>
+              </span>
            </div>
-            <pre className={styles.codeBody}>
-              <code>
-                <span className={styles.codeComment}># Docker one-liner</span>{'\n'}
-                <span className={styles.codePrompt}>$</span> docker run -d --name backupx \{'\n'}
-                {'    '}-p 8340:8340 \{'\n'}
-                {'    '}-v backupx-data:/app/data \{'\n'}
-                {'    '}awuqing/backupx:latest{'\n'}
-                {'\n'}
-                <span className={styles.codeComment}># Open http://localhost:8340</span>{'\n'}
-                <span className={styles.codeComment}># Deploy an Agent on a remote host</span>{'\n'}
-                <span className={styles.codePrompt}>$</span> backupx agent \{'\n'}
-                {'    '}--master <span className={styles.codeString}>http://master:8340</span> \{'\n'}
-                {'    '}--token <span className={styles.codeString}>&lt;token&gt;</span>
-              </code>
-            </pre>
+            <div className={styles.consoleGrid}>
+              <div>
+                <span className={styles.consoleLabel}>
+                  <Translate id="home.visual.success">Success rate</Translate>
+                </span>
+                <strong>99.4%</strong>
+              </div>
+              <div>
+                <span className={styles.consoleLabel}>
+                  <Translate id="home.visual.nodes">Active nodes</Translate>
+                </span>
+                <strong>12</strong>
+              </div>
+              <div>
+                <span className={styles.consoleLabel}>
+                  <Translate id="home.visual.targets">Storage targets</Translate>
+                </span>
+                <strong>8</strong>
+              </div>
+            </div>
+            <div className={styles.timeline}>
+              <div className={styles.timelineRow}>
+                <span className={styles.timelineDotOk} />
+                <div>
+                  <strong>
+                    <Translate id="home.visual.row1.title">PostgreSQL nightly</Translate>
+                  </strong>
+                  <span>
+                    <Translate id="home.visual.row1.desc">Encrypted archive uploaded to S3</Translate>
+                  </span>
+                </div>
+                <em>02:10</em>
+              </div>
+              <div className={styles.timelineRow}>
+                <span className={styles.timelineDotInfo} />
+                <div>
+                  <strong>
+                    <Translate id="home.visual.row2.title">SAP HANA snapshot</Translate>
+                  </strong>
+                  <span>
+                    <Translate id="home.visual.row2.desc">Running on agent-shanghai-02</Translate>
+                  </span>
+                </div>
+                <em>68%</em>
+              </div>
+              <div className={styles.timelineRow}>
+                <span className={styles.timelineDotWarn} />
+                <div>
+                  <strong>
+                    <Translate id="home.visual.row3.title">Retention cleanup</Translate>
+                  </strong>
+                  <span>
+                    <Translate id="home.visual.row3.desc">Next run in 4 hours</Translate>
+                  </span>
+                </div>
+                <em>queued</em>
+              </div>
+            </div>
+          </div>
+          <div className={styles.commandCard}>
+            <div className={styles.commandTitle}>
+              <Translate id="home.command.title">Start with Docker</Translate>
+            </div>
+            <code>docker run -d -p 8340:8340 awuqing/backupx:v2.2.1</code>
          </div>
        </div>
      </div>
@@ -100,12 +156,13 @@ export default function Home(): ReactNode {
  const {siteConfig} = useDocusaurusContext();
  return (
    <Layout
-      title={translate({id: 'home.pageTitle', message: 'Self-hosted backup management'})}
+      title={translate({id: 'home.pageTitle', message: 'Backup orchestration for self-hosted servers'})}
      description={siteConfig.tagline}>
      <HomepageHeader />
      <main>
        <HomepageFeatures />
        <HomepageShowcase />
+        <HomepageCommunity />
      </main>
    </Layout>
  );
--- a/docs-site/src/pages/sponsors.tsx
+++ b/docs-site/src/pages/sponsors.tsx
@@ -0,0 +1,39 @@
+import type {ReactNode} from 'react';
+import {translate} from '@docusaurus/Translate';
+import Translate from '@docusaurus/Translate';
+import Layout from '@theme/Layout';
+import Heading from '@theme/Heading';
+import {HomepageSponsors} from '@site/src/components/HomepageCommunity';
+import styles from '@site/src/components/HomepageCommunity/styles.module.css';
+
+export default function Sponsors(): ReactNode {
+  return (
+    <Layout
+      title={translate({id: 'sponsors.pageTitle', message: 'Sponsors'})}
+      description={translate({
+        id: 'sponsors.pageDescription',
+        message: 'Sponsor BackupX reliability, documentation, storage compatibility and long-term maintenance.',
+      })}>
+      <main>
+        <section className={styles.section}>
+          <div className="container">
+            <div className={styles.sectionHead}>
+              <div className={styles.sectionTag}>
+                <Translate id="sponsors.tag">SPONSORS</Translate>
+              </div>
+              <Heading as="h1" className={styles.sectionTitle}>
+                <Translate id="sponsors.title">Sponsor the BackupX ecosystem</Translate>
+              </Heading>
+              <p className={styles.sectionSubtitle}>
+                <Translate id="sponsors.subtitle">
+                  Sponsorship helps keep BackupX practical for real operators: tested storage providers, reliable releases, restore confidence and better documentation.
+                </Translate>
+              </p>
+            </div>
+            <HomepageSponsors />
+          </div>
+        </section>
+      </main>
+    </Layout>
+  );
+}
--- a/server/config.example.yaml
+++ b/server/config.example.yaml
@@ -3,6 +3,9 @@ server:
  host: "0.0.0.0"
  port: 8340
  mode: "release"              # debug | release
+  external_url: ""             # 可选：Master 对 Agent 可达的 URL，例如 https://backup.example.com
+  web_root: ""                 # 前端静态目录；留空自动探测（./web、/opt/backupx/web 等）。
+                               # 命中后后端直接托管 Web 控制台，无需额外 nginx 反向代理。

 database:
  path: "./data/backupx.db"    # SQLite 数据库路径
--- a/server/go.mod
+++ b/server/go.mod
@@ -6,12 +6,15 @@ require (
 	github.com/gin-gonic/gin v1.10.1
 	github.com/glebarez/sqlite v1.11.0
 	github.com/golang-jwt/jwt/v5 v5.3.0
+	github.com/klauspost/compress v1.18.1
 	github.com/natefinch/lumberjack v2.0.0+incompatible
-	github.com/rclone/rclone v1.73.3
+	github.com/pquerna/otp v1.5.0
+	github.com/prometheus/client_golang v1.23.2
+	github.com/rclone/rclone v1.73.5
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/spf13/viper v1.20.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/crypto v0.48.0
+	golang.org/x/crypto v0.50.0
 	golang.org/x/oauth2 v0.34.0
 	google.golang.org/api v0.255.0
 	gopkg.in/yaml.v3 v3.0.1
@@ -27,10 +30,10 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.3 // indirect
 	github.com/Azure/azure-sdk-for-go/sdk/storage/azfile v1.5.3 // indirect
-	github.com/Azure/go-ntlmssp v0.0.2-0.20251110135918-10b7b7e7cd26 // indirect
+	github.com/Azure/go-ntlmssp v0.1.1 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0 // indirect
 	github.com/BurntSushi/toml v1.6.0 // indirect
-	github.com/FilenCloudDienste/filen-sdk-go v0.0.37 // indirect
+	github.com/FilenCloudDienste/filen-sdk-go v0.0.38 // indirect
 	github.com/Files-com/files-sdk-go/v3 v3.2.264 // indirect
 	github.com/IBM/go-sdk-core/v5 v5.18.5 // indirect
 	github.com/Max-Sum/base32768 v0.0.0-20230304063302-18e6ce5945fd // indirect
@@ -47,25 +50,26 @@ require (
 	github.com/anchore/go-lzo v0.1.0 // indirect
 	github.com/andybalholm/cascadia v1.3.3 // indirect
 	github.com/appscode/go-querystring v0.0.0-20170504095604-0126cfb3f1dc // indirect
-	github.com/aws/aws-sdk-go-v2 v1.41.3 // indirect
-	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.6 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.31.17 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.41.7 // indirect
+	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.7.10 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.32.8 // indirect
 	github.com/aws/aws-sdk-go-v2/credentials v1.19.11 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.19 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.20.4 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.19 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.19 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.22.1 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.23 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.23 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.4 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.20 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.6 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.11 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.19 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.19 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.96.4 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.4.24 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.9.15 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.23 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.19.23 // indirect
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.101.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/signin v1.0.7 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.30.12 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.35.16 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.41.8 // indirect
-	github.com/aws/smithy-go v1.24.2 // indirect
+	github.com/aws/smithy-go v1.25.1 // indirect
 	github.com/bahlo/generic-list-go v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/boombuler/barcode v1.1.0 // indirect
@@ -107,7 +111,7 @@ require (
 	github.com/glebarez/go-sqlite v1.21.2 // indirect
 	github.com/go-chi/chi/v5 v5.2.5 // indirect
 	github.com/go-darwin/apfs v0.0.0-20211011131704-f84b94dbf348 // indirect
-	github.com/go-git/go-billy/v5 v5.6.2 // indirect
+	github.com/go-git/go-billy/v5 v5.9.0 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
@@ -146,7 +150,6 @@ require (
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/jtolio/noiseconn v0.0.0-20231127013910-f6d9ecbf1de7 // indirect
 	github.com/jzelinskie/whirlpool v0.0.0-20201016144138-0675e54bb004 // indirect
-	github.com/klauspost/compress v1.18.1 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/koofr/go-httpclient v0.0.0-20240520111329-e20f8f203988 // indirect
 	github.com/koofr/go-koofrclient v0.0.0-20221207135200-cbd7fc9ad6a6 // indirect
@@ -180,8 +183,6 @@ require (
 	github.com/pkg/xattr v0.4.12 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
-	github.com/pquerna/otp v1.5.0 // indirect
-	github.com/prometheus/client_golang v1.23.2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
 	github.com/prometheus/common v0.67.2 // indirect
 	github.com/prometheus/procfs v0.19.2 // indirect
@@ -224,22 +225,22 @@ require (
 	go.mongodb.org/mongo-driver v1.17.6 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0 // indirect
-	go.opentelemetry.io/otel v1.39.0 // indirect
-	go.opentelemetry.io/otel/metric v1.39.0 // indirect
-	go.opentelemetry.io/otel/trace v1.39.0 // indirect
+	go.opentelemetry.io/otel v1.41.0 // indirect
+	go.opentelemetry.io/otel/metric v1.41.0 // indirect
+	go.opentelemetry.io/otel/trace v1.41.0 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	golang.org/x/arch v0.14.0 // indirect
-	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
-	golang.org/x/image v0.32.0 // indirect
-	golang.org/x/mod v0.32.0 // indirect
-	golang.org/x/net v0.51.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
-	golang.org/x/sys v0.41.0 // indirect
-	golang.org/x/term v0.40.0 // indirect
-	golang.org/x/text v0.34.0 // indirect
+	golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f // indirect
+	golang.org/x/image v0.41.0 // indirect
+	golang.org/x/mod v0.35.0 // indirect
+	golang.org/x/net v0.53.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.43.0 // indirect
+	golang.org/x/term v0.42.0 // indirect
+	golang.org/x/text v0.37.0 // indirect
 	golang.org/x/time v0.14.0 // indirect
-	golang.org/x/tools v0.41.0 // indirect
+	golang.org/x/tools v0.44.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect
 	google.golang.org/grpc v1.79.3 // indirect
 	google.golang.org/protobuf v1.36.10 // indirect
--- a/server/go.sum
+++ b/server/go.sum
@@ -51,8 +51,8 @@ github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.3 h1:ZJJNFaQ86GVKQ9ehw
 github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.3/go.mod h1:URuDvhmATVKqHBH9/0nOiNKk0+YcwfQ3WkK5PqHKxc8=
 github.com/Azure/azure-sdk-for-go/sdk/storage/azfile v1.5.3 h1:sxgSqOB9CDToiaVFpxuvb5wGgGqWa3lCShcm5o0n3bE=
 github.com/Azure/azure-sdk-for-go/sdk/storage/azfile v1.5.3/go.mod h1:XdED8i399lEVblYHTZM8eXaP07gv4Z58IL6ueMlVlrg=
-github.com/Azure/go-ntlmssp v0.0.2-0.20251110135918-10b7b7e7cd26 h1:gy/jrlpp8EfSyA73a51fofoSfhp5rPNQAUvDr4Dm91c=
-github.com/Azure/go-ntlmssp v0.0.2-0.20251110135918-10b7b7e7cd26/go.mod h1:NYqdhxd/8aAct/s4qSYZEerdPuH1liG2/X9DiVTbhpk=
+github.com/Azure/go-ntlmssp v0.1.1 h1:l+FM/EEMb0U9QZE7mKNEDw5Mu3mFiaa2GKOoTSsNDPw=
+github.com/Azure/go-ntlmssp v0.1.1/go.mod h1:NYqdhxd/8aAct/s4qSYZEerdPuH1liG2/X9DiVTbhpk=
 github.com/AzureAD/microsoft-authentication-extensions-for-go/cache v0.1.1 h1:WJTmL004Abzc5wDB5VtZG2PJk5ndYDgVacGqfirKxjM=
 github.com/AzureAD/microsoft-authentication-extensions-for-go/cache v0.1.1/go.mod h1:tCcJZ0uHAmvjsVYzEFivsRTN00oz5BEsRgQHu5JZ9WE=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0 h1:XRzhVemXdgvJqCH0sFfrBUTnUJSBrBf7++ypk+twtRs=
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@@ -102,44 +102,46 @@ github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kk
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@@ -256,8 +258,8 @@ github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
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@@ -530,8 +532,8 @@ github.com/rclone/Proton-API-Bridge v1.0.1-0.20260127174007-77f974840d11 h1:4MI2
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@@ -651,16 +653,16 @@ go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ
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 go.opentelemetry.io/otel/sdk/metric v1.39.0/go.mod h1:xq9HEVH7qeX69/JnwEfp6fVq5wosJsY1mt4lLfYdVew=
-go.opentelemetry.io/otel/trace v1.39.0 h1:2d2vfpEDmCJ5zVYz7ijaJdOF59xLomrvj7bjt6/qCJI=
-go.opentelemetry.io/otel/trace v1.39.0/go.mod h1:88w4/PnZSazkGzz/w84VHpQafiU4EtqqlVdxWy+rNOA=
+go.opentelemetry.io/otel/trace v1.41.0 h1:Vbk2co6bhj8L59ZJ6/xFTskY+tGAbOnCtQGVVa9TIN0=
+go.opentelemetry.io/otel/trace v1.41.0/go.mod h1:U1NU4ULCoxeDKc09yCWdWe+3QoyweJcISEVa1RBzOis=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
@@ -688,8 +690,8 @@ golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliY
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
-golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
-golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
+golang.org/x/crypto v0.50.0 h1:zO47/JPrL6vsNkINmLoo/PH1gcxpls50DNogFvB5ZGI=
+golang.org/x/crypto v0.50.0/go.mod h1:3muZ7vA7PBCE6xgPX7nkzzjiUq87kRItoJQM1Yo8S+Q=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -700,12 +702,12 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
-golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 h1:mgKeJMpvi0yx/sU5GsxQ7p6s2wtOnGAHZWCHUM4KGzY=
-golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546/go.mod h1:j/pmGrbnkbPtQfxEe5D0VQhZC6qKbfKifgD0oM7sR70=
+golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f h1:W3F4c+6OLc6H2lb//N1q4WpJkhzJCK5J6kUi1NTVXfM=
+golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f/go.mod h1:J1xhfL/vlindoeF/aINzNzt2Bket5bjo9sdOYzOsU80=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
-golang.org/x/image v0.32.0 h1:6lZQWq75h7L5IWNk0r+SCpUJ6tUVd3v4ZHnbRKLkUDQ=
-golang.org/x/image v0.32.0/go.mod h1:/R37rrQmKXtO6tYXAjtDLwQgFLHmhW+V6ayXlxzP2Pc=
+golang.org/x/image v0.41.0 h1:8wS72eGJMJaBxK6okTzd4WaXumUlTVlb753MlsSvTCo=
+golang.org/x/image v0.41.0/go.mod h1:uIc348UZMSvS5Z65CVZ7iDPaNobNFEPeJ4kbqTOszmA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -730,8 +732,8 @@ golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/mod v0.32.0 h1:9F4d3PHLljb6x//jOyokMv3eX+YDeepZSEo3mFJy93c=
-golang.org/x/mod v0.32.0/go.mod h1:SgipZ/3h2Ci89DlEtEXWUk/HteuRin+HHhN+WbNhguU=
+golang.org/x/mod v0.35.0 h1:Ww1D637e6Pg+Zb2KrWfHQUnH2dQRLBQyAtpr/haaJeM=
+golang.org/x/mod v0.35.0/go.mod h1:+GwiRhIInF8wPm+4AoT6L0FA1QWAad3OMdTRx4tFYlU=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -771,8 +773,8 @@ golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
 golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
-golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=
-golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=
+golang.org/x/net v0.53.0 h1:d+qAbo5L0orcWAr0a9JweQpjXF19LMXJE8Ey7hwOdUA=
+golang.org/x/net v0.53.0/go.mod h1:JvMuJH7rrdiCfbeHoo3fCQU24Lf5JJwT9W3sJFulfgs=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -796,8 +798,8 @@ golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -847,8 +849,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
+golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -860,8 +862,8 @@ golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
-golang.org/x/term v0.40.0 h1:36e4zGLqU4yhjlmxEaagx2KuYbJq3EwY8K943ZsHcvg=
-golang.org/x/term v0.40.0/go.mod h1:w2P8uVp06p2iyKKuvXIm7N/y0UCRt3UfJTfZ7oOpglM=
+golang.org/x/term v0.42.0 h1:UiKe+zDFmJobeJ5ggPwOshJIVt6/Ft0rcfrXZDLWAWY=
+golang.org/x/term v0.42.0/go.mod h1:Dq/D+snpsbazcBG5+F9Q1n2rXV8Ma+71xEjTRufARgY=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -877,8 +879,8 @@ golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
-golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
+golang.org/x/text v0.37.0 h1:Cqjiwd9eSg8e0QAkyCaQTNHFIIzWtidPahFWR83rTrc=
+golang.org/x/text v0.37.0/go.mod h1:a5sjxXGs9hsn/AJVwuElvCAo9v8QYLzvavO5z2PiM38=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -931,8 +933,8 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
-golang.org/x/tools v0.41.0 h1:a9b8iMweWG+S0OBnlU36rzLp20z1Rp10w+IY2czHTQc=
-golang.org/x/tools v0.41.0/go.mod h1:XSY6eDqxVNiYgezAVqqCeihT4j1U2CCsqvH3WhQpnlg=
+golang.org/x/tools v0.44.0 h1:UP4ajHPIcuMjT1GqzDWRlalUEoY+uzoZKnhOjbIPD2c=
+golang.org/x/tools v0.44.0/go.mod h1:KA0AfVErSdxRZIsOVipbv3rQhVXTnlU6UhKxHd1seDI=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
--- a/server/internal/agent/client.go
+++ b/server/internal/agent/client.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"crypto/tls"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -125,10 +126,11 @@ type TaskSpec struct {

 // StorageTargetConfig 与 service.AgentStorageTargetConfig 对齐
 type StorageTargetConfig struct {
-	ID     uint            `json:"id"`
-	Type   string          `json:"type"`
-	Name   string          `json:"name"`
-	Config json.RawMessage `json:"config"`
+	ID           uint            `json:"id"`
+	Type         string          `json:"type"`
+	Name         string          `json:"name"`
+	Config       json.RawMessage `json:"config"`
+	TransferMode string          `json:"transferMode"`
 }

 // GetTaskSpec 拉取任务规格
@@ -143,13 +145,26 @@ func (c *MasterClient) GetTaskSpec(ctx context.Context, taskID uint) (*TaskSpec,

 // RecordUpdate 与 service.AgentRecordUpdate 对齐
 type RecordUpdate struct {
-	Status       string `json:"status,omitempty"`
-	FileName     string `json:"fileName,omitempty"`
-	FileSize     int64  `json:"fileSize,omitempty"`
-	Checksum     string `json:"checksum,omitempty"`
-	StoragePath  string `json:"storagePath,omitempty"`
-	ErrorMessage string `json:"errorMessage,omitempty"`
-	LogAppend    string `json:"logAppend,omitempty"`
+	Status               string              `json:"status,omitempty"`
+	FileName             string              `json:"fileName,omitempty"`
+	FileSize             int64               `json:"fileSize,omitempty"`
+	Checksum             string              `json:"checksum,omitempty"`
+	StoragePath          string              `json:"storagePath,omitempty"`
+	StorageTargetID      uint                `json:"storageTargetId,omitempty"`
+	StorageTransferMode  string              `json:"storageTransferMode,omitempty"`
+	StorageUploadResults []StorageResultItem `json:"storageUploadResults,omitempty"`
+	ErrorMessage         string              `json:"errorMessage,omitempty"`
+	LogAppend            string              `json:"logAppend,omitempty"`
+}
+
+type StorageResultItem struct {
+	StorageTargetID   uint   `json:"storageTargetId"`
+	StorageTargetName string `json:"storageTargetName"`
+	Status            string `json:"status"`
+	StoragePath       string `json:"storagePath,omitempty"`
+	FileSize          int64  `json:"fileSize,omitempty"`
+	TransferMode      string `json:"transferMode,omitempty"`
+	Error             string `json:"error,omitempty"`
 }

 // UpdateRecord 上报备份记录的状态/日志
@@ -158,6 +173,39 @@ func (c *MasterClient) UpdateRecord(ctx context.Context, recordID uint, update R
 	return c.do(ctx, http.MethodPost, path, update, nil)
 }

+// UploadArtifact streams an artifact through the Master for storage targets
+// that are not directly reachable from the Agent.
+func (c *MasterClient) UploadArtifact(ctx context.Context, recordID, targetID uint, objectKey string, size int64, checksum string, reader io.Reader) error {
+	path := fmt.Sprintf("/api/agent/records/%d/artifacts/%d", recordID, targetID)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPut, c.baseURL+path, reader)
+	if err != nil {
+		return err
+	}
+	// The executor owns and closes the artifact file. Prevent net/http from
+	// closing that underlying reader when it finishes the request body.
+	req.Body = io.NopCloser(reader)
+	req.ContentLength = size
+	req.Header.Set("Content-Type", "application/octet-stream")
+	req.Header.Set("X-Agent-Token", c.token)
+	req.Header.Set("X-BackupX-Object-Key", objectKey)
+	req.Header.Set("X-BackupX-SHA256", checksum)
+	client := *c.httpClient
+	client.Timeout = 0
+	resp, err := client.Do(req)
+	if err != nil {
+		return fmt.Errorf("relay artifact to Master: %w", err)
+	}
+	data, readErr := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	closeErr := resp.Body.Close()
+	if readErr != nil || closeErr != nil {
+		return errors.Join(readErr, closeErr)
+	}
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("relay artifact to Master: http %d: %s", resp.StatusCode, string(data))
+	}
+	return nil
+}
+
 // RestoreSpec 与 service.AgentRestoreSpec 对齐
 type RestoreSpec struct {
 	RestoreRecordID uint                `json:"restoreRecordId"`
@@ -179,6 +227,7 @@ type RestoreSpec struct {
 	Storage         StorageTargetConfig `json:"storage"`
 	StoragePath     string              `json:"storagePath"`
 	FileName        string              `json:"fileName"`
+	Checksum        string              `json:"checksum,omitempty"`
 }

 // RestoreUpdate 与 service.AgentRestoreUpdate 对齐
@@ -198,6 +247,27 @@ func (c *MasterClient) GetRestoreSpec(ctx context.Context, restoreRecordID uint)
 	return &spec, nil
 }

+func (c *MasterClient) DownloadRestoreArtifact(ctx context.Context, restoreRecordID uint) (io.ReadCloser, error) {
+	path := fmt.Sprintf("/api/agent/restores/%d/artifact", restoreRecordID)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+path, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("X-Agent-Token", c.token)
+	client := *c.httpClient
+	client.Timeout = 0
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("download relayed artifact from Master: %w", err)
+	}
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+		return resp.Body, nil
+	}
+	data, readErr := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	closeErr := resp.Body.Close()
+	return nil, errors.Join(fmt.Errorf("download relayed artifact from Master: http %d: %s", resp.StatusCode, string(data)), readErr, closeErr)
+}
+
 // UpdateRestore 上报恢复记录的状态/日志
 func (c *MasterClient) UpdateRestore(ctx context.Context, restoreRecordID uint, update RestoreUpdate) error {
 	path := fmt.Sprintf("/api/agent/restores/%d", restoreRecordID)
--- a/server/internal/agent/config.go
+++ b/server/internal/agent/config.go
@@ -26,7 +26,7 @@ type Config struct {
 	HeartbeatInterval string `yaml:"heartbeatInterval"`
 	// PollInterval 命令轮询间隔，默认 5s
 	PollInterval string `yaml:"pollInterval"`
-	// TempDir 备份临时目录，默认 /tmp/backupx-agent
+	// TempDir 备份临时目录，默认 /var/lib/backupx-agent/tmp
 	TempDir string `yaml:"tempDir"`
 	// InsecureSkipTLSVerify 测试环境允许跳过 TLS 证书校验
 	InsecureSkipTLSVerify bool `yaml:"insecureSkipTlsVerify"`
@@ -98,7 +98,7 @@ func applyConfigDefaults(cfg *Config) (*Config, error) {
 		cfg.PollInterval = "5s"
 	}
 	if cfg.TempDir == "" {
-		cfg.TempDir = "/tmp/backupx-agent"
+		cfg.TempDir = "/var/lib/backupx-agent/tmp"
 	}
 	cfg.Master = strings.TrimRight(strings.TrimSpace(cfg.Master), "/")
 	return cfg, nil
--- a/server/internal/agent/config_test.go
+++ b/server/internal/agent/config_test.go
@@ -50,7 +50,7 @@ func TestLoadConfigDefaults(t *testing.T) {
 	if cfg.HeartbeatInterval != "15s" || cfg.PollInterval != "5s" {
 		t.Errorf("default intervals not applied: %+v", cfg)
 	}
-	if cfg.TempDir != "/tmp/backupx-agent" {
+	if cfg.TempDir != "/var/lib/backupx-agent/tmp" {
 		t.Errorf("default tempdir: %q", cfg.TempDir)
 	}
 }
--- a/server/internal/agent/executor.go
+++ b/server/internal/agent/executor.go
@@ -4,6 +4,8 @@ import (
 	"context"
 	"crypto/sha256"
 	"encoding/hex"
+	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -19,10 +21,10 @@ import (

 // Executor 负责在 Agent 本地执行命令。
 type Executor struct {
-	client           *MasterClient
-	tempDir          string
-	backupRegistry   *backup.Registry
-	storageRegistry  *storage.Registry
+	client          *MasterClient
+	tempDir         string
+	backupRegistry  *backup.Registry
+	storageRegistry *storage.Registry
 }

 // NewExecutor 构造执行器。预先初始化 backup runner 与 storage registry。
@@ -33,6 +35,7 @@ func NewExecutor(client *MasterClient, tempDir string) *Executor {
 		backup.NewMySQLRunner(nil),
 		backup.NewPostgreSQLRunner(nil),
 		backup.NewSAPHANARunner(nil),
+		backup.NewMongoDBRunner(nil),
 	)
 	storageRegistry := storage.NewRegistry(
 		storageRclone.NewLocalDiskFactory(),
@@ -59,6 +62,11 @@ func NewExecutor(client *MasterClient, tempDir string) *Executor {
 // 注意：Agent 当前不支持 Encrypt=true（加密密钥不下发到 Agent，避免密钥扩散）。
 // 遇到启用加密的任务会向 Master 上报失败并返回错误。
 func (e *Executor) ExecuteRunTask(ctx context.Context, taskID, recordID uint) error {
+	if err := e.ensureTempDir(); err != nil {
+		e.reportRecordFailure(ctx, recordID, err.Error())
+		return err
+	}
+
 	// 1) 拉取任务规格
 	spec, err := e.client.GetTaskSpec(ctx, taskID)
 	if err != nil {
@@ -74,10 +82,6 @@ func (e *Executor) ExecuteRunTask(ctx context.Context, taskID, recordID uint) er

 	// 2) 构造 backup.TaskSpec 并找对应 runner
 	startedAt := time.Now().UTC()
-	if err := os.MkdirAll(e.tempDir, 0o755); err != nil {
-		e.reportRecordFailure(ctx, recordID, fmt.Sprintf("创建临时目录失败: %v", err))
-		return err
-	}
 	backupSpec := buildBackupTaskSpec(spec, startedAt, e.tempDir)
 	runner, err := e.backupRegistry.Runner(backupSpec.Type)
 	if err != nil {
@@ -104,6 +108,14 @@ func (e *Executor) ExecuteRunTask(ctx context.Context, taskID, recordID uint) er
 			return compressErr
 		}
 		finalPath = compressedPath
+	} else if strings.EqualFold(spec.Compression, "zstd") && !strings.HasSuffix(strings.ToLower(finalPath), ".zst") {
+		e.appendLog(ctx, recordID, "[agent] 开始压缩备份文件（zstd）\n")
+		compressedPath, compressErr := compress.ZstdFile(finalPath)
+		if compressErr != nil {
+			e.reportRecordFailure(ctx, recordID, fmt.Sprintf("压缩失败: %v", compressErr))
+			return compressErr
+		}
+		finalPath = compressedPath
 	}
 	info, err := os.Stat(finalPath)
 	if err != nil {
@@ -112,7 +124,7 @@ func (e *Executor) ExecuteRunTask(ctx context.Context, taskID, recordID uint) er
 	}
 	fileName := filepath.Base(finalPath)
 	fileSize := info.Size()
-	storagePath := backup.BuildStorageKey(spec.Type, startedAt, fileName)
+	storagePath := backup.BuildRecordStorageKey(spec.Type, startedAt, recordID, fileName)

 	// 5) 计算 checksum（一次读一次）并上传到所有目标
 	checksum, err := computeFileSHA256(finalPath)
@@ -124,48 +136,88 @@ func (e *Executor) ExecuteRunTask(ctx context.Context, taskID, recordID uint) er
 		e.reportRecordFailure(ctx, recordID, "没有关联的存储目标")
 		return fmt.Errorf("no storage targets")
 	}
+	uploadResults := make([]StorageResultItem, 0, len(spec.StorageTargets))
+	selectedStorageTargetID := uint(0)
+	selectedStorageTransferMode := ""
+	var uploadErrors []string
 	for _, target := range spec.StorageTargets {
-		if err := e.uploadToTarget(ctx, recordID, target, finalPath, storagePath, fileSize, spec.TaskID); err != nil {
-			e.reportRecordFailure(ctx, recordID, fmt.Sprintf("上传到 %s 失败: %v", target.Name, err))
-			return err
+		if err := e.uploadToTarget(ctx, recordID, target, finalPath, storagePath, fileSize, checksum, spec.TaskID); err != nil {
+			uploadResults = append(uploadResults, StorageResultItem{
+				StorageTargetID:   target.ID,
+				StorageTargetName: target.Name,
+				Status:            "failed",
+				TransferMode:      target.TransferMode,
+				Error:             err.Error(),
+			})
+			uploadErrors = append(uploadErrors, fmt.Sprintf("%s: %v", target.Name, err))
+			e.appendLog(ctx, recordID, fmt.Sprintf("[agent] 上传到存储目标 %s 失败: %v\n", target.Name, err))
+			continue
 		}
+		if selectedStorageTargetID == 0 {
+			selectedStorageTargetID = target.ID
+			selectedStorageTransferMode = target.TransferMode
+		}
+		uploadResults = append(uploadResults, StorageResultItem{
+			StorageTargetID:   target.ID,
+			StorageTargetName: target.Name,
+			Status:            "success",
+			StoragePath:       storagePath,
+			FileSize:          fileSize,
+			TransferMode:      target.TransferMode,
+		})
 		e.appendLog(ctx, recordID, fmt.Sprintf("[agent] 已上传到存储目标 %s\n", target.Name))
 	}
+	if selectedStorageTargetID == 0 {
+		msg := strings.Join(uploadErrors, "; ")
+		if msg == "" {
+			msg = "所有存储目标上传均失败"
+		}
+		e.reportRecordFailureWithUploadResults(ctx, recordID, msg, uploadResults)
+		return fmt.Errorf("%s", msg)
+	}

 	// 6) 上报最终成功
 	return e.client.UpdateRecord(ctx, recordID, RecordUpdate{
-		Status:      "success",
-		FileName:    fileName,
-		FileSize:    fileSize,
-		Checksum:    checksum,
-		StoragePath: storagePath,
-		LogAppend:   fmt.Sprintf("[agent] 任务完成，总计 %d 字节\n", fileSize),
+		Status:               "success",
+		FileName:             fileName,
+		FileSize:             fileSize,
+		Checksum:             checksum,
+		StoragePath:          storagePath,
+		StorageTargetID:      selectedStorageTargetID,
+		StorageTransferMode:  selectedStorageTransferMode,
+		StorageUploadResults: uploadResults,
+		LogAppend:            fmt.Sprintf("[agent] 任务完成，总计 %d 字节\n", fileSize),
 	})
 }

 // uploadToTarget 上传单个目标。为保持简化不做上传级重试（rclone 本身已有 low-level 重试）。
-func (e *Executor) uploadToTarget(ctx context.Context, recordID uint, target StorageTargetConfig, filePath, objectKey string, fileSize int64, taskID uint) error {
-	var rawConfig map[string]any
-	if len(target.Config) > 0 {
-		// DecodeRawConfig 通过 json 解析
-		if err := jsonUnmarshalMap(target.Config, &rawConfig); err != nil {
-			return fmt.Errorf("parse storage config: %w", err)
-		}
-	}
-	provider, err := e.storageRegistry.Create(ctx, target.Type, rawConfig)
-	if err != nil {
-		return fmt.Errorf("create provider: %w", err)
-	}
+func (e *Executor) uploadToTarget(ctx context.Context, recordID uint, target StorageTargetConfig, filePath, objectKey string, fileSize int64, checksum string, taskID uint) error {
 	f, err := os.Open(filePath)
 	if err != nil {
 		return fmt.Errorf("open artifact: %w", err)
 	}
-	defer f.Close()
+	if target.TransferMode == storage.TransferModeMasterRelay {
+		uploadErr := e.client.UploadArtifact(ctx, recordID, target.ID, objectKey, fileSize, checksum, f)
+		return errors.Join(uploadErr, f.Close())
+	}
+	var rawConfig map[string]any
+	if len(target.Config) > 0 {
+		// DecodeRawConfig 通过 json 解析
+		if err := jsonUnmarshalMap(target.Config, &rawConfig); err != nil {
+			return errors.Join(fmt.Errorf("parse storage config: %w", err), f.Close())
+		}
+	}
+	provider, err := e.storageRegistry.Create(ctx, target.Type, rawConfig)
+	if err != nil {
+		closeErr := f.Close()
+		return errors.Join(fmt.Errorf("create provider: %w", err), closeErr)
+	}
 	meta := map[string]string{
 		"taskId":   fmt.Sprintf("%d", taskID),
 		"recordId": fmt.Sprintf("%d", recordID),
 	}
-	return provider.Upload(ctx, objectKey, f, fileSize, meta)
+	uploadErr := provider.Upload(ctx, objectKey, f, fileSize, meta)
+	return errors.Join(uploadErr, f.Close())
 }

 // appendLog 追加日志到 Master 记录（尽力而为，失败不中断主流程）
@@ -175,31 +227,22 @@ func (e *Executor) appendLog(ctx context.Context, recordID uint, line string) {

 // reportRecordFailure 上报失败状态
 func (e *Executor) reportRecordFailure(ctx context.Context, recordID uint, msg string) {
+	e.reportRecordFailureWithUploadResults(ctx, recordID, msg, nil)
+}
+
+func (e *Executor) reportRecordFailureWithUploadResults(ctx context.Context, recordID uint, msg string, uploadResults []StorageResultItem) {
 	_ = e.client.UpdateRecord(ctx, recordID, RecordUpdate{
-		Status:       "failed",
-		ErrorMessage: msg,
-		LogAppend:    fmt.Sprintf("[agent] 错误: %s\n", msg),
+		Status:               "failed",
+		ErrorMessage:         msg,
+		StorageUploadResults: uploadResults,
+		LogAppend:            fmt.Sprintf("[agent] 错误: %s\n", msg),
 	})
 }

 // buildBackupTaskSpec 把 AgentTaskSpec 转换为 backup.TaskSpec。
 func buildBackupTaskSpec(spec *TaskSpec, startedAt time.Time, tempDir string) backup.TaskSpec {
-	var sourcePaths []string
-	if strings.TrimSpace(spec.SourcePaths) != "" {
-		for _, p := range strings.Split(spec.SourcePaths, "\n") {
-			if p = strings.TrimSpace(p); p != "" {
-				sourcePaths = append(sourcePaths, p)
-			}
-		}
-	}
-	var excludes []string
-	if strings.TrimSpace(spec.ExcludePatterns) != "" {
-		for _, p := range strings.Split(spec.ExcludePatterns, "\n") {
-			if p = strings.TrimSpace(p); p != "" {
-				excludes = append(excludes, p)
-			}
-		}
-	}
+	sourcePaths := parseStringListField(spec.SourcePaths)
+	excludes := parseStringListField(spec.ExcludePatterns)
 	return backup.TaskSpec{
 		ID:              spec.TaskID,
 		Name:            spec.Name,
@@ -222,6 +265,37 @@ func buildBackupTaskSpec(spec *TaskSpec, startedAt time.Time, tempDir string) ba
 	}
 }

+func (e *Executor) ensureTempDir() error {
+	if err := os.MkdirAll(e.tempDir, 0o755); err != nil {
+		return fmt.Errorf("create agent temp dir: %w", err)
+	}
+	return nil
+}
+
+func parseStringListField(value string) []string {
+	trimmed := strings.TrimSpace(value)
+	if trimmed == "" || trimmed == "[]" {
+		return nil
+	}
+	var jsonItems []string
+	if err := json.Unmarshal([]byte(trimmed), &jsonItems); err == nil {
+		return compactStringList(jsonItems)
+	}
+	return compactStringList(strings.FieldsFunc(trimmed, func(r rune) bool {
+		return r == '\n' || r == '\r'
+	}))
+}
+
+func compactStringList(items []string) []string {
+	result := make([]string, 0, len(items))
+	for _, item := range items {
+		if trimmed := strings.TrimSpace(item); trimmed != "" {
+			result = append(result, trimmed)
+		}
+	}
+	return result
+}
+
 // recordLogger 把 runner 日志回传到 Master 记录。
 // 实现 backup.LogWriter，每条日志追加到 record.log_content。
 type recordLogger struct {
@@ -240,8 +314,8 @@ func (l *recordLogger) WriteLine(message string) {

 // restoreLogger 把 runner 日志回传到 Master 恢复记录。
 type restoreLogger struct {
-	ctx      context.Context
-	client   *MasterClient
+	ctx       context.Context
+	client    *MasterClient
 	restoreID uint
 }

@@ -265,11 +339,16 @@ func (e *Executor) DeleteStorageObject(ctx context.Context, targetType string, t
 // ExecuteRestore 处理 restore_record 命令：拉规格 → 下载 → 解压 → 执行 runner.Restore → 上报结果。
 //
 // 与 ExecuteRunTask 对称，但方向相反：
-//   - 下载：通过 spec.Storage 创建 provider → Download(spec.StoragePath)
+//   - 下载：直连共享存储，或通过 Master 中转其本地磁盘对象
 //   - 解密：当前 Agent 不支持加密恢复（密钥未下发），spec.Encrypt=true 会直接失败
 //   - 执行：backup.Registry.Runner(spec.Type).Restore
 //   - 上报：通过 UpdateRestore（status/logAppend）
 func (e *Executor) ExecuteRestore(ctx context.Context, restoreRecordID uint) error {
+	if err := e.ensureTempDir(); err != nil {
+		e.reportRestoreFailure(ctx, restoreRecordID, err.Error())
+		return err
+	}
+
 	spec, err := e.client.GetRestoreSpec(ctx, restoreRecordID)
 	if err != nil {
 		e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("拉取恢复规格失败: %v", err))
@@ -282,10 +361,6 @@ func (e *Executor) ExecuteRestore(ctx context.Context, restoreRecordID uint) err
 	}
 	e.appendRestoreLog(ctx, restoreRecordID, fmt.Sprintf("[agent] 开始恢复 %s (type=%s)\n", spec.TaskName, spec.Type))

-	if err := os.MkdirAll(e.tempDir, 0o755); err != nil {
-		e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("创建临时目录失败: %v", err))
-		return err
-	}
 	tmpDir, err := os.MkdirTemp(e.tempDir, "restore-*")
 	if err != nil {
 		e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("创建恢复临时目录失败: %v", err))
@@ -293,28 +368,31 @@ func (e *Executor) ExecuteRestore(ctx context.Context, restoreRecordID uint) err
 	}
 	defer os.RemoveAll(tmpDir)

-	// 1) 创建 storage provider
-	var rawConfig map[string]any
-	if len(spec.Storage.Config) > 0 {
-		if err := jsonUnmarshalMap(spec.Storage.Config, &rawConfig); err != nil {
-			e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("解析存储配置失败: %v", err))
-			return err
-		}
-	}
-	provider, err := e.storageRegistry.Create(ctx, spec.Storage.Type, rawConfig)
-	if err != nil {
-		e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("创建存储客户端失败: %v", err))
-		return err
-	}
-
-	// 2) 下载
+	// 1) 下载
 	fileName := spec.FileName
 	if strings.TrimSpace(fileName) == "" {
 		fileName = filepath.Base(spec.StoragePath)
 	}
 	artifactPath := filepath.Join(tmpDir, filepath.Base(fileName))
 	e.appendRestoreLog(ctx, restoreRecordID, fmt.Sprintf("[agent] 下载备份文件 %s\n", spec.StoragePath))
-	reader, err := provider.Download(ctx, spec.StoragePath)
+	var reader io.ReadCloser
+	if spec.Storage.TransferMode == storage.TransferModeMasterRelay {
+		reader, err = e.client.DownloadRestoreArtifact(ctx, restoreRecordID)
+	} else {
+		var rawConfig map[string]any
+		if len(spec.Storage.Config) > 0 {
+			if err := jsonUnmarshalMap(spec.Storage.Config, &rawConfig); err != nil {
+				e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("解析存储配置失败: %v", err))
+				return err
+			}
+		}
+		provider, providerErr := e.storageRegistry.Create(ctx, spec.Storage.Type, rawConfig)
+		if providerErr != nil {
+			e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("创建存储客户端失败: %v", providerErr))
+			return providerErr
+		}
+		reader, err = provider.Download(ctx, spec.StoragePath)
+	}
 	if err != nil {
 		e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("下载备份失败: %v", err))
 		return err
@@ -324,6 +402,24 @@ func (e *Executor) ExecuteRestore(ctx context.Context, restoreRecordID uint) err
 		return err
 	}

+	// 2.5) 完整性校验：还原前比对下载对象的 SHA-256（与 Master 本地恢复路径一致）。
+	// 拒绝还原损坏或被篡改的备份；早期无 checksum 的备份跳过（向后兼容）。
+	if strings.TrimSpace(spec.Checksum) != "" {
+		e.appendRestoreLog(ctx, restoreRecordID, "[agent] 校验备份完整性（SHA-256）\n")
+		actual, sumErr := computeFileSHA256(artifactPath)
+		if sumErr != nil {
+			msg := fmt.Sprintf("计算校验和失败: %v", sumErr)
+			e.reportRestoreFailure(ctx, restoreRecordID, msg)
+			return fmt.Errorf("%s", msg)
+		}
+		if !strings.EqualFold(actual, spec.Checksum) {
+			msg := "备份文件完整性校验失败：SHA-256 不匹配，文件可能已损坏或被篡改"
+			e.reportRestoreFailure(ctx, restoreRecordID, msg)
+			return fmt.Errorf("%s（期望 %s，实际 %s）", msg, spec.Checksum, actual)
+		}
+		e.appendRestoreLog(ctx, restoreRecordID, "[agent] 完整性校验通过\n")
+	}
+
 	// 3) 解压（Agent 不支持加密，遇到 .enc 会直接失败）
 	preparedPath := artifactPath
 	if strings.HasSuffix(strings.ToLower(preparedPath), ".enc") {
@@ -340,6 +436,15 @@ func (e *Executor) ExecuteRestore(ctx context.Context, restoreRecordID uint) err
 		}
 		preparedPath = decompressed
 	}
+	if strings.HasSuffix(strings.ToLower(preparedPath), ".zst") {
+		e.appendRestoreLog(ctx, restoreRecordID, "[agent] 解压 zstd 压缩\n")
+		decompressed, err := compress.UnzstdFile(preparedPath)
+		if err != nil {
+			e.reportRestoreFailure(ctx, restoreRecordID, fmt.Sprintf("解压失败: %v", err))
+			return err
+		}
+		preparedPath = decompressed
+	}

 	// 4) 运行 runner.Restore
 	taskSpec := buildRestoreBackupTaskSpec(spec, time.Now().UTC(), tmpDir)
@@ -398,8 +503,10 @@ func buildRestoreBackupTaskSpec(spec *RestoreSpec, startedAt time.Time, tempDir
 }

 // writeReaderToLocal 把 reader 写到本地文件（Agent 侧工具函数）。
-func writeReaderToLocal(targetPath string, reader io.ReadCloser) error {
-	defer reader.Close()
+func writeReaderToLocal(targetPath string, reader io.ReadCloser) (err error) {
+	defer func() {
+		err = errors.Join(err, reader.Close())
+	}()
 	if err := os.MkdirAll(filepath.Dir(targetPath), 0o755); err != nil {
 		return err
 	}
@@ -407,9 +514,8 @@ func writeReaderToLocal(targetPath string, reader io.ReadCloser) error {
 	if err != nil {
 		return err
 	}
-	defer file.Close()
-	_, err = io.Copy(file, reader)
-	return err
+	_, copyErr := io.Copy(file, reader)
+	return errors.Join(copyErr, file.Close())
 }

 // 辅助函数
--- a/server/internal/agent/executor_test.go
+++ b/server/internal/agent/executor_test.go
@@ -0,0 +1,380 @@
+package agent
+
+import (
+	"archive/tar"
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+	"time"
+
+	"backupx/server/internal/storage"
+)
+
+func TestBuildBackupTaskSpecParsesJSONSourcePaths(t *testing.T) {
+	spec := &TaskSpec{
+		TaskID:          7,
+		Name:            "root-files",
+		Type:            "file",
+		SourcePaths:     `["/root","/etc"]`,
+		ExcludePatterns: `["*.log","tmp"]`,
+	}
+
+	got := buildBackupTaskSpec(spec, time.Unix(0, 0), "/var/lib/backupx-agent/tmp")
+
+	if !reflect.DeepEqual(got.SourcePaths, []string{"/root", "/etc"}) {
+		t.Fatalf("source paths = %#v", got.SourcePaths)
+	}
+	if !reflect.DeepEqual(got.ExcludePatterns, []string{"*.log", "tmp"}) {
+		t.Fatalf("exclude patterns = %#v", got.ExcludePatterns)
+	}
+}
+
+func TestParseStringListFieldKeepsLegacyLineFormat(t *testing.T) {
+	got := parseStringListField("/root\n /etc \n")
+	want := []string{"/root", "/etc"}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("paths = %#v, want %#v", got, want)
+	}
+}
+
+func TestExecuteRunTaskRecordsPerTargetUploadResults(t *testing.T) {
+	sourceDir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(sourceDir, "index.html"), []byte("hello"), 0o644); err != nil {
+		t.Fatalf("WriteFile returned error: %v", err)
+	}
+	var finalUpdate RecordUpdate
+	var updates []RecordUpdate
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == http.MethodGet && r.URL.Path == "/api/agent/tasks/1":
+			writeAgentEnvelope(t, w, TaskSpec{
+				TaskID:      1,
+				Name:        "site",
+				Type:        "file",
+				SourcePath:  sourceDir,
+				Compression: "gzip",
+				StorageTargets: []StorageTargetConfig{
+					{ID: 11, Name: "broken", Type: "agent_test_storage", Config: json.RawMessage(`{"name":"broken"}`)},
+					{ID: 12, Name: "ok", Type: "agent_test_storage", Config: json.RawMessage(`{"name":"ok"}`)},
+				},
+			})
+		case r.Method == http.MethodPost && r.URL.Path == "/api/agent/records/99":
+			var update RecordUpdate
+			if err := json.NewDecoder(r.Body).Decode(&update); err != nil {
+				t.Fatalf("Decode update returned error: %v", err)
+			}
+			updates = append(updates, update)
+			if update.Status != "" {
+				finalUpdate = update
+			}
+			writeAgentEnvelope(t, w, map[string]string{"status": "ok"})
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	executor := NewExecutor(NewMasterClient(server.URL, "token", false), filepath.Join(t.TempDir(), "tmp"))
+	executor.storageRegistry = storage.NewRegistry(&agentTestStorageFactory{
+		providers: map[string]*agentTestStorageProvider{
+			"broken": {name: "broken", failUpload: true},
+			"ok":     {name: "ok", objects: map[string][]byte{}},
+		},
+	})
+
+	if err := executor.ExecuteRunTask(context.Background(), 1, 99); err != nil {
+		t.Fatalf("ExecuteRunTask returned error: %v", err)
+	}
+	if len(updates) == 0 || finalUpdate.Status != "success" {
+		t.Fatalf("expected final success update, got updates=%#v final=%#v", updates, finalUpdate)
+	}
+	if finalUpdate.StorageTargetID != 12 {
+		t.Fatalf("expected first successful target 12, got %d", finalUpdate.StorageTargetID)
+	}
+	if len(finalUpdate.StorageUploadResults) != 2 {
+		t.Fatalf("expected two upload results, got %#v", finalUpdate.StorageUploadResults)
+	}
+	if finalUpdate.StorageUploadResults[0].Status != "failed" || finalUpdate.StorageUploadResults[1].Status != "success" {
+		t.Fatalf("unexpected upload results: %#v", finalUpdate.StorageUploadResults)
+	}
+	if finalUpdate.StoragePath == "" || finalUpdate.FileSize <= 0 || finalUpdate.Checksum == "" {
+		t.Fatalf("expected artifact metadata in final update, got %#v", finalUpdate)
+	}
+}
+
+func TestExecuteRunTaskRelaysMasterLocalDiskTarget(t *testing.T) {
+	sourceDir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(sourceDir, "index.html"), []byte("centralize me"), 0o644); err != nil {
+		t.Fatalf("WriteFile returned error: %v", err)
+	}
+	var relayed []byte
+	var finalUpdate RecordUpdate
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == http.MethodGet && r.URL.Path == "/api/agent/tasks/1":
+			writeAgentEnvelope(t, w, TaskSpec{
+				TaskID:      1,
+				Name:        "remote-source",
+				Type:        "file",
+				SourcePath:  sourceDir,
+				Compression: "gzip",
+				StorageTargets: []StorageTargetConfig{{
+					ID: 11, Name: "master-disk", Type: storage.TypeLocalDisk, TransferMode: storage.TransferModeMasterRelay,
+				}},
+			})
+		case r.Method == http.MethodPut && r.URL.Path == "/api/agent/records/99/artifacts/11":
+			body, err := io.ReadAll(r.Body)
+			if err != nil {
+				t.Fatalf("ReadAll relayed body: %v", err)
+			}
+			digest := sha256.Sum256(body)
+			if got := r.Header.Get("X-BackupX-SHA256"); got != fmt.Sprintf("%x", digest[:]) {
+				t.Fatalf("relay checksum header = %q", got)
+			}
+			objectKey := r.Header.Get("X-BackupX-Object-Key")
+			if !strings.Contains(objectKey, "/records/99/") || r.ContentLength != int64(len(body)) {
+				t.Fatalf("invalid relay metadata: key=%q length=%d body=%d", objectKey, r.ContentLength, len(body))
+			}
+			relayed = append([]byte(nil), body...)
+			writeAgentEnvelope(t, w, map[string]string{"status": "ok"})
+		case r.Method == http.MethodPost && r.URL.Path == "/api/agent/records/99":
+			var update RecordUpdate
+			if err := json.NewDecoder(r.Body).Decode(&update); err != nil {
+				t.Fatalf("Decode update returned error: %v", err)
+			}
+			if update.Status != "" {
+				finalUpdate = update
+			}
+			writeAgentEnvelope(t, w, map[string]string{"status": "ok"})
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	executor := NewExecutor(NewMasterClient(server.URL, "token", false), filepath.Join(t.TempDir(), "tmp"))
+	if err := executor.ExecuteRunTask(context.Background(), 1, 99); err != nil {
+		t.Fatalf("ExecuteRunTask returned error: %v", err)
+	}
+	if len(relayed) == 0 {
+		t.Fatal("expected artifact bytes to be streamed through Master")
+	}
+	if finalUpdate.Status != "success" || finalUpdate.StorageTransferMode != storage.TransferModeMasterRelay {
+		t.Fatalf("unexpected final relay update: %#v", finalUpdate)
+	}
+	if len(finalUpdate.StorageUploadResults) != 1 || finalUpdate.StorageUploadResults[0].TransferMode != storage.TransferModeMasterRelay {
+		t.Fatalf("unexpected relay target result: %#v", finalUpdate.StorageUploadResults)
+	}
+}
+
+func TestExecuteRestoreDownloadsMasterRelayedArtifact(t *testing.T) {
+	var archive bytes.Buffer
+	tarWriter := tar.NewWriter(&archive)
+	content := []byte("restored through Master")
+	header := &tar.Header{Name: "site/index.html", Mode: 0o644, Size: int64(len(content)), Typeflag: tar.TypeReg}
+	if err := tarWriter.WriteHeader(header); err != nil {
+		t.Fatalf("WriteHeader returned error: %v", err)
+	}
+	if _, err := tarWriter.Write(content); err != nil {
+		t.Fatalf("Write returned error: %v", err)
+	}
+	if err := tarWriter.Close(); err != nil {
+		t.Fatalf("Close returned error: %v", err)
+	}
+	artifact := append([]byte(nil), archive.Bytes()...)
+	digest := sha256.Sum256(artifact)
+	restoreRoot := t.TempDir()
+	restoreSource := filepath.Join(restoreRoot, "site")
+	artifactRequests := 0
+	var finalUpdate RestoreUpdate
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == http.MethodGet && r.URL.Path == "/api/agent/restores/77/spec":
+			writeAgentEnvelope(t, w, RestoreSpec{
+				RestoreRecordID: 77,
+				BackupRecordID:  99,
+				TaskID:          1,
+				TaskName:        "remote-source",
+				Type:            "file",
+				SourcePath:      restoreSource,
+				Storage: StorageTargetConfig{
+					ID: 11, Name: "master-disk", Type: storage.TypeLocalDisk, TransferMode: storage.TransferModeMasterRelay,
+				},
+				StoragePath: "BackupX/file/site.tar",
+				FileName:    "site.tar",
+				Checksum:    fmt.Sprintf("%x", digest[:]),
+			})
+		case r.Method == http.MethodGet && r.URL.Path == "/api/agent/restores/77/artifact":
+			artifactRequests++
+			if r.Header.Get("X-Agent-Token") != "token" {
+				t.Fatalf("missing Agent token on relay download")
+			}
+			w.Header().Set("Content-Length", fmt.Sprintf("%d", len(artifact)))
+			_, _ = w.Write(artifact)
+		case r.Method == http.MethodPost && r.URL.Path == "/api/agent/restores/77":
+			var update RestoreUpdate
+			if err := json.NewDecoder(r.Body).Decode(&update); err != nil {
+				t.Fatalf("Decode update returned error: %v", err)
+			}
+			if update.Status != "" {
+				finalUpdate = update
+			}
+			writeAgentEnvelope(t, w, map[string]string{"status": "ok"})
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	executor := NewExecutor(NewMasterClient(server.URL, "token", false), filepath.Join(t.TempDir(), "tmp"))
+	if err := executor.ExecuteRestore(context.Background(), 77); err != nil {
+		t.Fatalf("ExecuteRestore returned error: %v", err)
+	}
+	if artifactRequests != 1 {
+		t.Fatalf("expected one relay artifact request, got %d", artifactRequests)
+	}
+	restored, err := os.ReadFile(filepath.Join(restoreRoot, "site", "index.html"))
+	if err != nil {
+		t.Fatalf("ReadFile returned error: %v", err)
+	}
+	if string(restored) != string(content) {
+		t.Fatalf("restored content = %q, want %q", restored, content)
+	}
+	if finalUpdate.Status != "success" {
+		t.Fatalf("unexpected final restore update: %#v", finalUpdate)
+	}
+}
+
+func TestExecuteRunTaskReportsPerTargetUploadResultsWhenAllTargetsFail(t *testing.T) {
+	sourceDir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(sourceDir, "index.html"), []byte("hello"), 0o644); err != nil {
+		t.Fatalf("WriteFile returned error: %v", err)
+	}
+	var finalUpdate RecordUpdate
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == http.MethodGet && r.URL.Path == "/api/agent/tasks/1":
+			writeAgentEnvelope(t, w, TaskSpec{
+				TaskID:      1,
+				Name:        "site",
+				Type:        "file",
+				SourcePath:  sourceDir,
+				Compression: "gzip",
+				StorageTargets: []StorageTargetConfig{
+					{ID: 11, Name: "broken-a", Type: "agent_test_storage", Config: json.RawMessage(`{"name":"broken-a"}`)},
+					{ID: 12, Name: "broken-b", Type: "agent_test_storage", Config: json.RawMessage(`{"name":"broken-b"}`)},
+				},
+			})
+		case r.Method == http.MethodPost && r.URL.Path == "/api/agent/records/99":
+			var update RecordUpdate
+			if err := json.NewDecoder(r.Body).Decode(&update); err != nil {
+				t.Fatalf("Decode update returned error: %v", err)
+			}
+			if update.Status != "" {
+				finalUpdate = update
+			}
+			writeAgentEnvelope(t, w, map[string]string{"status": "ok"})
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	executor := NewExecutor(NewMasterClient(server.URL, "token", false), filepath.Join(t.TempDir(), "tmp"))
+	executor.storageRegistry = storage.NewRegistry(&agentTestStorageFactory{
+		providers: map[string]*agentTestStorageProvider{
+			"broken-a": {name: "broken-a", failUpload: true},
+			"broken-b": {name: "broken-b", failUpload: true},
+		},
+	})
+
+	if err := executor.ExecuteRunTask(context.Background(), 1, 99); err == nil {
+		t.Fatal("expected ExecuteRunTask to return upload failure")
+	}
+	if finalUpdate.Status != "failed" {
+		t.Fatalf("expected final failed update, got %#v", finalUpdate)
+	}
+	if len(finalUpdate.StorageUploadResults) != 2 {
+		t.Fatalf("expected failed update to keep per-target results, got %#v", finalUpdate.StorageUploadResults)
+	}
+	for _, item := range finalUpdate.StorageUploadResults {
+		if item.Status != "failed" || item.Error == "" {
+			t.Fatalf("unexpected upload result: %#v", item)
+		}
+	}
+}
+
+type agentTestStorageFactory struct {
+	providers map[string]*agentTestStorageProvider
+}
+
+func (f *agentTestStorageFactory) Type() storage.ProviderType {
+	return "agent_test_storage"
+}
+
+func (f *agentTestStorageFactory) New(_ context.Context, config map[string]any) (storage.StorageProvider, error) {
+	name, _ := config["name"].(string)
+	provider := f.providers[name]
+	if provider == nil {
+		return nil, fmt.Errorf("unknown provider %q", name)
+	}
+	return provider, nil
+}
+
+type agentTestStorageProvider struct {
+	name       string
+	failUpload bool
+	objects    map[string][]byte
+}
+
+func (p *agentTestStorageProvider) Type() storage.ProviderType { return "agent_test_storage" }
+func (p *agentTestStorageProvider) TestConnection(context.Context) error {
+	return nil
+}
+func (p *agentTestStorageProvider) Upload(_ context.Context, objectKey string, reader io.Reader, _ int64, _ map[string]string) error {
+	if p.failUpload {
+		return fmt.Errorf("upload failed for %s", p.name)
+	}
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		return err
+	}
+	if p.objects == nil {
+		p.objects = map[string][]byte{}
+	}
+	p.objects[objectKey] = data
+	return nil
+}
+func (p *agentTestStorageProvider) Download(_ context.Context, objectKey string) (io.ReadCloser, error) {
+	data, ok := p.objects[objectKey]
+	if !ok {
+		return nil, fmt.Errorf("object %s not found", objectKey)
+	}
+	return io.NopCloser(strings.NewReader(string(data))), nil
+}
+func (p *agentTestStorageProvider) Delete(_ context.Context, objectKey string) error {
+	delete(p.objects, objectKey)
+	return nil
+}
+func (p *agentTestStorageProvider) List(context.Context, string) ([]storage.ObjectInfo, error) {
+	return nil, nil
+}
+
+func writeAgentEnvelope(t *testing.T, w http.ResponseWriter, data any) {
+	t.Helper()
+	w.Header().Set("Content-Type", "application/json")
+	if err := json.NewEncoder(w).Encode(map[string]any{"code": "OK", "data": data}); err != nil {
+		t.Fatalf("Encode response returned error: %v", err)
+	}
+}
--- a/server/internal/agent/fs.go
+++ b/server/internal/agent/fs.go
@@ -5,6 +5,7 @@ import (
 	"os"
 	"path/filepath"
 	"sort"
+	"strings"
 )

 // DirEntry Agent 返回给 Master 的目录项。
@@ -17,8 +18,8 @@ type DirEntry struct {

 // listLocalDir 列出 Agent 所在机器的指定路径。
 func listLocalDir(path string) ([]DirEntry, error) {
-	cleaned := filepath.Clean(path)
-	if cleaned == "" {
+	cleaned := filepath.Clean(strings.TrimSpace(path))
+	if strings.TrimSpace(path) == "" || cleaned == "." {
 		cleaned = "/"
 	}
 	entries, err := os.ReadDir(cleaned)
--- a/server/internal/agent/fs_test.go
+++ b/server/internal/agent/fs_test.go
@@ -36,6 +36,21 @@ func TestListLocalDir(t *testing.T) {
 	}
 }

+func TestListLocalDirEmptyPathUsesRoot(t *testing.T) {
+	entries, err := listLocalDir("")
+	if err != nil {
+		t.Fatalf("list root: %v", err)
+	}
+	if len(entries) == 0 {
+		t.Fatalf("expected root entries")
+	}
+	for _, entry := range entries {
+		if !filepath.IsAbs(entry.Path) {
+			t.Fatalf("entry path should be absolute: %+v", entry)
+		}
+	}
+}
+
 func TestSplitCommaOrNewline(t *testing.T) {
 	cases := []struct {
 		in  string
--- a/server/internal/app/app.go
+++ b/server/internal/app/app.go
@@ -13,6 +13,7 @@ import (
 	"backupx/server/internal/database"
 	aphttp "backupx/server/internal/http"
 	"backupx/server/internal/logger"
+	"backupx/server/internal/metrics"
 	"backupx/server/internal/notify"
 	"backupx/server/internal/repository"
 	"backupx/server/internal/scheduler"
@@ -59,9 +60,9 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,

 	jwtManager := security.NewJWTManager(resolvedSecurity.JWTSecret, config.MustJWTDuration(cfg.Security))
 	rateLimiter := security.NewLoginRateLimiter(5, time.Minute)
-	authService := service.NewAuthService(userRepo, systemConfigRepo, jwtManager, rateLimiter)
-	systemService := service.NewSystemService(cfg, version, time.Now().UTC())
 	configCipher := codec.NewConfigCipher(resolvedSecurity.EncryptionKey)
+	authService := service.NewAuthService(userRepo, systemConfigRepo, jwtManager, rateLimiter, configCipher)
+	systemService := service.NewSystemService(cfg, version, time.Now().UTC())
 	storageRegistry := storage.NewRegistry(
 		storageRclone.NewLocalDiskFactory(),
 		storageRclone.NewS3Factory(),
@@ -81,11 +82,12 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,
 	backupTaskService := service.NewBackupTaskService(backupTaskRepo, storageTargetRepo, configCipher)
 	backupTaskService.SetRecordsAndStorage(backupRecordRepo, storageRegistry)
 	// nodeRepo 在下方 Cluster 节点管理区块才实例化，这里延后注入
-	backupRunnerRegistry := backup.NewRegistry(backup.NewFileRunner(), backup.NewSQLiteRunner(), backup.NewMySQLRunner(nil), backup.NewPostgreSQLRunner(nil), backup.NewSAPHANARunner(nil))
+	backupRunnerRegistry := backup.NewRegistry(backup.NewFileRunner(), backup.NewSQLiteRunner(), backup.NewMySQLRunner(nil), backup.NewPostgreSQLRunner(nil), backup.NewSAPHANARunner(nil), backup.NewMongoDBRunner(nil))
 	logHub := backup.NewLogHub()
-	retentionService := backupretention.NewService(backupRecordRepo)
+	retentionService := backupretention.NewService(backupRecordRepo, configCipher.Key())
 	notifyRegistry := notify.NewRegistry(notify.NewEmailNotifier(), notify.NewWebhookNotifier(), notify.NewTelegramNotifier())
 	notificationService := service.NewNotificationService(notificationRepo, notifyRegistry, configCipher)
+	authService.SetNotificationService(notificationService)
 	// 初始化 rclone 传输配置（重试 + 带宽限制）
 	rcloneCtx := storageRclone.ConfiguredContext(ctx, storageRclone.TransferConfig{
 		LowLevelRetries: cfg.Backup.Retries,
@@ -102,6 +104,7 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,
 	restoreRecordRepo := repository.NewRestoreRecordRepository(db)
 	restoreLogHub := backup.NewLogHub()
 	dashboardService := service.NewDashboardService(backupTaskRepo, backupRecordRepo, storageTargetRepo)
+	reportService := service.NewReportService(backupTaskRepo, backupRecordRepo)
 	settingsService := service.NewSettingsService(systemConfigRepo)

 	// Audit
@@ -109,6 +112,10 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,
 	auditService := service.NewAuditService(auditLogRepo)
 	authService.SetAuditService(auditService)
 	schedulerService.SetAuditRecorder(auditService)
+	// 审计日志外输：启动时用当前 settings 初始化 webhook，后续前端修改立即生效
+	settingsService.SetAuditWebhookConfigurer(ctx, auditService)
+	// 审计日志保留期清理：每 6h 读取 audit_retention_days 设置并清理超期日志（0/缺省=永久保留）
+	auditService.StartRetentionMonitor(ctx, systemConfigRepo, 6*time.Hour)

 	// Database discovery（集群依赖在 agentService 创建后注入）
 	databaseDiscoveryService := service.NewDatabaseDiscoveryService(backup.NewOSCommandExecutor())
@@ -127,7 +134,8 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,

 	// Agent 协议服务：命令队列 + 任务下发 + 记录上报
 	agentCmdRepo := repository.NewAgentCommandRepository(db)
-	agentService := service.NewAgentService(nodeRepo, backupTaskRepo, backupRecordRepo, storageTargetRepo, agentCmdRepo, configCipher)
+	nodeService.SetAgentCommandRepository(agentCmdRepo)
+	agentService := service.NewAgentService(nodeRepo, backupTaskRepo, backupRecordRepo, storageTargetRepo, agentCmdRepo, configCipher, storageRegistry)
 	agentService.SetRestoreRepository(restoreRecordRepo)
 	agentService.StartCommandTimeoutMonitor(ctx, 30*time.Second, 10*time.Minute)

@@ -226,39 +234,56 @@ func New(ctx context.Context, cfg config.Config, version string) (*Application,
 	// Dashboard 集群概览依赖注入
 	dashboardService.SetClusterDependencies(nodeRepo, version)

+	// Prometheus 指标采集：Counter/Histogram 由业务服务实时写入；
+	// Gauge 类（存储用量、节点在线、SLA 违约）由 Collector 每 30s 异步刷新，
+	// 避免 /metrics 请求路径做慢 IO。
+	appMetrics := metrics.New(version)
+	backupExecutionService.SetMetrics(appMetrics)
+	restoreService.SetMetrics(appMetrics)
+	verificationService.SetMetrics(appMetrics)
+	replicationService.SetMetrics(appMetrics)
+	metricsCollector := metrics.NewCollector(
+		appMetrics,
+		metrics.NewRepoSource(storageTargetRepo, backupRecordRepo, nodeRepo, backupTaskRepo, agentCmdRepo),
+		30*time.Second,
+	)
+	metricsCollector.Start(ctx)
+
 	router := aphttp.NewRouter(aphttp.RouterDependencies{
-		Context:                ctx,
-		Config:                 cfg,
-		Version:                version,
-		Logger:                 appLogger,
-		AuthService:            authService,
-		SystemService:          systemService,
-		StorageTargetService:   storageTargetService,
-		BackupTaskService:      backupTaskService,
-		BackupExecutionService: backupExecutionService,
-		BackupRecordService:    backupRecordService,
-		RestoreService:         restoreService,
-		VerificationService:    verificationService,
-		ReplicationService:     replicationService,
-		TaskTemplateService:    taskTemplateService,
-		TaskExportService:      taskExportService,
-		SearchService:          searchService,
-		EventBroadcaster:       eventBroadcaster,
-		UserService:            userService,
-		ApiKeyService:          apiKeyService,
-		NotificationService:    notificationService,
-		DashboardService:       dashboardService,
-		SettingsService:        settingsService,
+		Context:                  ctx,
+		Config:                   cfg,
+		Version:                  version,
+		Logger:                   appLogger,
+		AuthService:              authService,
+		SystemService:            systemService,
+		StorageTargetService:     storageTargetService,
+		BackupTaskService:        backupTaskService,
+		BackupExecutionService:   backupExecutionService,
+		BackupRecordService:      backupRecordService,
+		RestoreService:           restoreService,
+		VerificationService:      verificationService,
+		ReplicationService:       replicationService,
+		TaskTemplateService:      taskTemplateService,
+		TaskExportService:        taskExportService,
+		SearchService:            searchService,
+		EventBroadcaster:         eventBroadcaster,
+		UserService:              userService,
+		ApiKeyService:            apiKeyService,
+		NotificationService:      notificationService,
+		DashboardService:         dashboardService,
+		ReportService:            reportService,
+		SettingsService:          settingsService,
 		NodeService:              nodeService,
 		AgentService:             agentService,
 		DatabaseDiscoveryService: databaseDiscoveryService,
-		AuditService:            auditService,
+		AuditService:             auditService,
 		JWTManager:               jwtManager,
 		UserRepository:           userRepo,
 		SystemConfigRepo:         systemConfigRepo,
 		InstallTokenService:      installTokenService,
-		MasterExternalURL:        "", // 如需覆盖 URL，可扩展 cfg.Server 增字段；目前留空依赖 X-Forwarded-* / Request.Host
+		MasterExternalURL:        cfg.Server.ExternalURL,
 		DB:                       db,
+		Metrics:                  appMetrics,
 	})

 	httpServer := &stdhttp.Server{
--- a/server/internal/backup/file_runner.go
+++ b/server/internal/backup/file_runner.go
@@ -3,6 +3,7 @@ package backup
 import (
 	"archive/tar"
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -52,6 +53,20 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 	defer tw.Close()

 	excludes := normalizeExcludePatterns(task.ExcludePatterns)
+
+	// 差异备份：基于上次全量清单仅打包新增/变更条目并记录删除；
+	// 全量备份：记录完整清单（manifest）供后续差异比对。
+	differential := task.Differential && len(task.BaseManifest.Entries) > 0
+	baseIndex := map[string]ManifestEntry{}
+	seen := map[string]struct{}{}
+	var manifest *Manifest
+	if differential {
+		baseIndex = task.BaseManifest.index()
+		writer.WriteLine(fmt.Sprintf("差异备份模式：基线含 %d 个条目", len(baseIndex)))
+	} else {
+		manifest = &Manifest{Entries: make([]ManifestEntry, 0)}
+	}
+
 	totalFileCount := 0
 	totalDirCount := 0

@@ -88,6 +103,16 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 				return nil
 			}

+			entry := entryFromInfo(archiveName, currentInfo)
+			if differential {
+				seen[entry.Path] = struct{}{}
+				if !changedSince(baseIndex, entry) {
+					return nil // 自全量以来未变更，跳过
+				}
+			} else {
+				manifest.Entries = append(manifest.Entries, entry)
+			}
+
 			if currentInfo.IsDir() {
 				dirCount++
 				writer.WriteLine(fmt.Sprintf("📁 进入目录 %s", archiveName))
@@ -103,13 +128,19 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 			}

 			if currentInfo.Mode().IsRegular() {
-				file, err := os.Open(currentPath)
-				if err != nil {
-					return err
-				}
-				defer file.Close()
-				if _, err := io.CopyN(tw, file, currentInfo.Size()); err != nil && err != io.EOF {
-					return err
+				// 每个文件在独立作用域内打开并关闭，避免在大目录树中累积打开的文件句柄。
+				if copyErr := func() error {
+					file, err := os.Open(currentPath)
+					if err != nil {
+						return err
+					}
+					defer file.Close()
+					if _, err := io.CopyN(tw, file, currentInfo.Size()); err != nil && err != io.EOF {
+						return err
+					}
+					return nil
+				}(); copyErr != nil {
+					return copyErr
 				}
 				fileCount++
 				if fileCount%100 == 0 {
@@ -130,10 +161,16 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 		totalDirCount += dirCount
 	}

-	if len(sourcePaths) > 1 {
+	if differential {
+		deletions := deletedPaths(baseIndex, seen)
+		if err := writeDeletionsEntry(tw, deletions); err != nil {
+			return nil, err
+		}
+		writer.WriteLine(fmt.Sprintf("差异备份完成（%d 个目录、%d 个文件变更，删除 %d 项）", totalDirCount, totalFileCount, len(deletions)))
+	} else if len(sourcePaths) > 1 {
 		writer.WriteLine(fmt.Sprintf("全部源路径打包完成（共 %d 个目录，%d 个文件）", totalDirCount, totalFileCount))
 	}
-	return &RunResult{ArtifactPath: artifactPath, FileName: filepath.Base(artifactPath), TempDir: tempDir}, nil
+	return &RunResult{ArtifactPath: artifactPath, FileName: filepath.Base(artifactPath), TempDir: tempDir, Manifest: manifest}, nil
 }

 func (r *FileRunner) Restore(_ context.Context, task TaskSpec, artifactPath string, writer LogWriter) error {
@@ -148,9 +185,15 @@ func (r *FileRunner) Restore(_ context.Context, task TaskSpec, artifactPath stri
 		restoreSource = task.SourcePaths[0]
 	}
 	targetParent := filepath.Dir(filepath.Clean(strings.TrimSpace(restoreSource)))
+	// 恢复到指定位置：非空时归档解压到用户指定目录，而非原始源父目录。
+	if override := strings.TrimSpace(task.RestoreTargetPath); override != "" {
+		targetParent = filepath.Clean(override)
+		writer.WriteLine(fmt.Sprintf("恢复到指定目录：%s", targetParent))
+	}
 	if err := os.MkdirAll(targetParent, 0o755); err != nil {
 		return fmt.Errorf("create restore parent: %w", err)
 	}
+	var pendingDeletions []string
 	tr := tar.NewReader(artifactFile)
 	for {
 		header, err := tr.Next()
@@ -160,13 +203,27 @@ func (r *FileRunner) Restore(_ context.Context, task TaskSpec, artifactPath stri
 		if err != nil {
 			return fmt.Errorf("read tar entry: %w", err)
 		}
+		// 差异归档的删除清单不落地，留待提取完成后统一应用（避免被同批新增条目误删）。
+		if header.Name == deletionsEntryName {
+			data, readErr := io.ReadAll(tr)
+			if readErr != nil {
+				return fmt.Errorf("read deletions entry: %w", readErr)
+			}
+			if jsonErr := json.Unmarshal(data, &pendingDeletions); jsonErr != nil {
+				return fmt.Errorf("parse deletions entry: %w", jsonErr)
+			}
+			continue
+		}
 		cleanName := path.Clean(strings.TrimSpace(header.Name))
 		if cleanName == "." || cleanName == "" {
 			continue
 		}
-		targetPath := filepath.Clean(filepath.Join(targetParent, filepath.FromSlash(cleanName)))
-		parentWithSep := filepath.Clean(targetParent) + string(filepath.Separator)
-		if targetPath != filepath.Clean(targetParent) && !strings.HasPrefix(targetPath, parentWithSep) {
+		// 选择性恢复：仅提取被选中的文件/目录（及其子项）。
+		if len(task.SelectedPaths) > 0 && !pathSelected(cleanName, task.SelectedPaths) {
+			continue
+		}
+		targetPath, ok := resolveWithinParent(targetParent, cleanName)
+		if !ok {
 			return fmt.Errorf("tar entry escapes restore path")
 		}
 		switch header.Typeflag {
@@ -191,10 +248,94 @@ func (r *FileRunner) Restore(_ context.Context, task TaskSpec, artifactPath stri
 			}
 		}
 	}
+	// 选择性恢复时仅对选中范围应用删除，避免误删未选中的文件。
+	if len(task.SelectedPaths) > 0 {
+		pendingDeletions = filterSelectedPaths(pendingDeletions, task.SelectedPaths)
+	}
+	if err := applyDeletions(targetParent, pendingDeletions, writer); err != nil {
+		return err
+	}
 	writer.WriteLine("文件恢复完成")
 	return nil
 }

+// pathSelected 判断归档条目名是否落在选中集合内（精确匹配或位于选中目录之下）。
+func pathSelected(name string, selected []string) bool {
+	for _, sel := range selected {
+		clean := path.Clean(strings.TrimSpace(sel))
+		if clean == "" || clean == "." {
+			continue
+		}
+		if name == clean || strings.HasPrefix(name, clean+"/") {
+			return true
+		}
+	}
+	return false
+}
+
+// filterSelectedPaths 仅保留落在选中集合内的路径。
+func filterSelectedPaths(paths []string, selected []string) []string {
+	filtered := make([]string, 0, len(paths))
+	for _, p := range paths {
+		if pathSelected(path.Clean(strings.TrimSpace(p)), selected) {
+			filtered = append(filtered, p)
+		}
+	}
+	return filtered
+}
+
+// resolveWithinParent 将归档相对名安全解析为 targetParent 下的绝对路径；
+// 越界（路径穿越）时返回 ok=false。提取与删除共用此校验，杜绝逃逸。
+func resolveWithinParent(targetParent, name string) (string, bool) {
+	targetPath := filepath.Clean(filepath.Join(targetParent, filepath.FromSlash(name)))
+	cleanParent := filepath.Clean(targetParent)
+	if targetPath == cleanParent {
+		return targetPath, true
+	}
+	if !strings.HasPrefix(targetPath, cleanParent+string(filepath.Separator)) {
+		return "", false
+	}
+	return targetPath, true
+}
+
+// writeDeletionsEntry 将差异备份的删除路径列表写入归档特殊条目。
+func writeDeletionsEntry(tw *tar.Writer, deletions []string) error {
+	payload, err := json.Marshal(deletions)
+	if err != nil {
+		return fmt.Errorf("marshal deletions: %w", err)
+	}
+	header := &tar.Header{Name: deletionsEntryName, Mode: 0o600, Size: int64(len(payload)), Typeflag: tar.TypeReg}
+	if err := tw.WriteHeader(header); err != nil {
+		return fmt.Errorf("write deletions header: %w", err)
+	}
+	if _, err := tw.Write(payload); err != nil {
+		return fmt.Errorf("write deletions body: %w", err)
+	}
+	return nil
+}
+
+// applyDeletions 在基线恢复之上删除差异归档记录的路径（仅差异备份恢复时存在）。
+// 每个路径经 resolveWithinParent 校验，越界即报错；目标不存在视为已删除。
+func applyDeletions(targetParent string, deletions []string, writer LogWriter) error {
+	for _, name := range deletions {
+		clean := path.Clean(strings.TrimSpace(name))
+		if clean == "." || clean == "" {
+			continue
+		}
+		targetPath, ok := resolveWithinParent(targetParent, clean)
+		if !ok {
+			return fmt.Errorf("deletion entry escapes restore path")
+		}
+		if err := os.RemoveAll(targetPath); err != nil {
+			return fmt.Errorf("apply deletion %s: %w", clean, err)
+		}
+	}
+	if len(deletions) > 0 {
+		writer.WriteLine(fmt.Sprintf("已应用差异删除 %d 项", len(deletions)))
+	}
+	return nil
+}
+
 func normalizeExcludePatterns(items []string) []string {
 	result := make([]string, 0, len(items))
 	for _, item := range items {
--- a/server/internal/backup/file_runner_diff_test.go
+++ b/server/internal/backup/file_runner_diff_test.go
@@ -0,0 +1,182 @@
+package backup
+
+import (
+	"archive/tar"
+	"context"
+	"io"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func diffWrite(t *testing.T, p, content string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
+		t.Fatalf("mkdir %s: %v", filepath.Dir(p), err)
+	}
+	if err := os.WriteFile(p, []byte(content), 0o644); err != nil {
+		t.Fatalf("write %s: %v", p, err)
+	}
+}
+
+func diffAssertContent(t *testing.T, p, want string) {
+	t.Helper()
+	got, err := os.ReadFile(p)
+	if err != nil {
+		t.Fatalf("read %s: %v", p, err)
+	}
+	if string(got) != want {
+		t.Fatalf("%s content = %q, want %q", p, string(got), want)
+	}
+}
+
+func diffAssertAbsent(t *testing.T, p string) {
+	t.Helper()
+	if _, err := os.Stat(p); !os.IsNotExist(err) {
+		t.Fatalf("expected %s to be absent, stat err=%v", p, err)
+	}
+}
+
+func diffArchiveNames(t *testing.T, artifactPath string) map[string]bool {
+	t.Helper()
+	f, err := os.Open(artifactPath)
+	if err != nil {
+		t.Fatalf("open artifact: %v", err)
+	}
+	defer f.Close()
+	names := map[string]bool{}
+	tr := tar.NewReader(f)
+	for {
+		h, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatalf("read tar: %v", err)
+		}
+		names[h.Name] = true
+	}
+	return names
+}
+
+// TestFileRunnerDifferentialRoundTrip 验证差异备份的端到端正确性：
+// 全量 → 修改源（变更/删除/新增）→ 差异 → 链式恢复（全量+差异）→ 结果与修改后源一致。
+func TestFileRunnerDifferentialRoundTrip(t *testing.T) {
+	work := t.TempDir()
+	src := filepath.Join(work, "src")
+	diffWrite(t, filepath.Join(src, "a.txt"), "alpha")
+	diffWrite(t, filepath.Join(src, "b.txt"), "bravo")
+	diffWrite(t, filepath.Join(src, "sub", "c.txt"), "charlie")
+
+	runner := NewFileRunner()
+
+	full, err := runner.Run(context.Background(), TaskSpec{Name: "diff", Type: "file", SourcePath: src, TempDir: t.TempDir()}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("full Run: %v", err)
+	}
+	if full.Manifest == nil || len(full.Manifest.Entries) == 0 {
+		t.Fatalf("full backup must produce a manifest, got %#v", full.Manifest)
+	}
+
+	// 变更 a.txt（内容变长 → size 差异必被检出）、删除 b.txt、新增 d.txt；sub/c.txt 不变
+	diffWrite(t, filepath.Join(src, "a.txt"), "ALPHA-modified-and-longer")
+	if err := os.Remove(filepath.Join(src, "b.txt")); err != nil {
+		t.Fatalf("remove b.txt: %v", err)
+	}
+	diffWrite(t, filepath.Join(src, "d.txt"), "delta")
+
+	diff, err := runner.Run(context.Background(), TaskSpec{Name: "diff", Type: "file", SourcePath: src, TempDir: t.TempDir(), Differential: true, BaseManifest: *full.Manifest}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("differential Run: %v", err)
+	}
+	if diff.Manifest != nil {
+		t.Fatalf("differential backup must not produce a manifest")
+	}
+
+	// 差异归档应包含变更/新增条目与删除清单，但不含未变更的 sub/c.txt
+	names := diffArchiveNames(t, diff.ArtifactPath)
+	if !names["src/a.txt"] || !names["src/d.txt"] {
+		t.Fatalf("differential archive missing changed/new entries: %v", names)
+	}
+	if names["src/sub/c.txt"] {
+		t.Fatalf("differential archive should not contain unchanged file sub/c.txt")
+	}
+	if !names[deletionsEntryName] {
+		t.Fatalf("differential archive missing deletions entry: %v", names)
+	}
+
+	// 链式恢复到全新目标
+	restoreRoot := t.TempDir()
+	restoreSrc := filepath.Join(restoreRoot, "src")
+	restoreTask := TaskSpec{Name: "diff", Type: "file", SourcePath: restoreSrc}
+	if err := runner.Restore(context.Background(), restoreTask, full.ArtifactPath, NopLogWriter{}); err != nil {
+		t.Fatalf("restore full: %v", err)
+	}
+	if err := runner.Restore(context.Background(), restoreTask, diff.ArtifactPath, NopLogWriter{}); err != nil {
+		t.Fatalf("restore differential: %v", err)
+	}
+
+	diffAssertContent(t, filepath.Join(restoreSrc, "a.txt"), "ALPHA-modified-and-longer")
+	diffAssertContent(t, filepath.Join(restoreSrc, "sub", "c.txt"), "charlie")
+	diffAssertContent(t, filepath.Join(restoreSrc, "d.txt"), "delta")
+	diffAssertAbsent(t, filepath.Join(restoreSrc, "b.txt"))
+}
+
+func TestPathSelected(t *testing.T) {
+	sel := []string{"src/a.txt", "src/sub"}
+	cases := map[string]bool{
+		"src/a.txt":     true,
+		"src/sub":       true,
+		"src/sub/c.txt": true,  // 选中目录下的子项
+		"src/b.txt":     false, // 未选中文件
+		"src/subother":  false, // 前缀相近但非子项，不应误判
+	}
+	for name, want := range cases {
+		if got := pathSelected(name, sel); got != want {
+			t.Errorf("pathSelected(%q) = %v, want %v", name, got, want)
+		}
+	}
+}
+
+// TestFileRunnerSelectiveRestore 验证按需恢复：仅选中的文件与目录被还原，未选中的文件不出现。
+func TestFileRunnerSelectiveRestore(t *testing.T) {
+	work := t.TempDir()
+	src := filepath.Join(work, "src")
+	diffWrite(t, filepath.Join(src, "a.txt"), "alpha")
+	diffWrite(t, filepath.Join(src, "b.txt"), "bravo")
+	diffWrite(t, filepath.Join(src, "sub", "c.txt"), "charlie")
+
+	runner := NewFileRunner()
+	full, err := runner.Run(context.Background(), TaskSpec{Name: "sel", Type: "file", SourcePath: src, TempDir: t.TempDir()}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("full Run: %v", err)
+	}
+
+	restoreRoot := t.TempDir()
+	restoreSrc := filepath.Join(restoreRoot, "src")
+	task := TaskSpec{Name: "sel", Type: "file", SourcePath: restoreSrc, SelectedPaths: []string{"src/a.txt", "src/sub"}}
+	if err := runner.Restore(context.Background(), task, full.ArtifactPath, NopLogWriter{}); err != nil {
+		t.Fatalf("selective Restore: %v", err)
+	}
+	diffAssertContent(t, filepath.Join(restoreSrc, "a.txt"), "alpha")
+	diffAssertContent(t, filepath.Join(restoreSrc, "sub", "c.txt"), "charlie") // 选中目录 → 子项一并恢复
+	diffAssertAbsent(t, filepath.Join(restoreSrc, "b.txt"))                     // 未选中 → 不恢复
+}
+
+// TestFileRunnerDifferentialWithoutBaseIsFull 验证无基线时差异请求回退为全量（产出清单、含全部文件）。
+func TestFileRunnerDifferentialWithoutBaseIsFull(t *testing.T) {
+	src := filepath.Join(t.TempDir(), "src")
+	diffWrite(t, filepath.Join(src, "a.txt"), "alpha")
+
+	runner := NewFileRunner()
+	res, err := runner.Run(context.Background(), TaskSpec{Name: "diff", Type: "file", SourcePath: src, TempDir: t.TempDir(), Differential: true}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("Run: %v", err)
+	}
+	if res.Manifest == nil {
+		t.Fatalf("differential without base must fall back to full and produce a manifest")
+	}
+	if names := diffArchiveNames(t, res.ArtifactPath); !names["src/a.txt"] || names[deletionsEntryName] {
+		t.Fatalf("fallback-full archive unexpected: %v", names)
+	}
+}
--- a/server/internal/backup/manifest.go
+++ b/server/internal/backup/manifest.go
@@ -0,0 +1,92 @@
+package backup
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"sort"
+)
+
+// deletionsEntryName 是差异备份归档中记录「自全量以来被删除路径」的特殊条目名。
+// 恢复时该条目不落地为文件，而是用于在基线之上删除对应路径。
+const deletionsEntryName = ".backupx/deletions.json"
+
+// ManifestEntry 记录一次全量备份中单个归档条目（文件或目录）的指纹，
+// 供差异备份比对「自全量以来的变化」。Path 为归档内相对名（slash 分隔，
+// 与 tar header.Name 一致）。字段使用短键以压缩清单体积。
+type ManifestEntry struct {
+	Path      string `json:"p"`
+	Size      int64  `json:"s"`
+	ModTimeNs int64  `json:"m"`
+	Mode      uint32 `json:"o"`
+	IsDir     bool   `json:"d,omitempty"`
+}
+
+// Manifest 是一次全量备份的完整条目清单（文件与目录）。
+type Manifest struct {
+	Entries []ManifestEntry `json:"entries"`
+}
+
+// EncodeManifest 将清单序列化为紧凑 JSON。
+func EncodeManifest(m Manifest) ([]byte, error) {
+	return json.Marshal(m)
+}
+
+// DecodeManifest 反序列化清单；空输入返回空清单（视为「无基线」）。
+func DecodeManifest(data []byte) (Manifest, error) {
+	m := Manifest{}
+	if len(data) == 0 {
+		return m, nil
+	}
+	if err := json.Unmarshal(data, &m); err != nil {
+		return Manifest{}, err
+	}
+	return m, nil
+}
+
+// index 构建 path -> entry 映射，便于差异比对 O(1) 查找。
+func (m Manifest) index() map[string]ManifestEntry {
+	idx := make(map[string]ManifestEntry, len(m.Entries))
+	for _, e := range m.Entries {
+		idx[e.Path] = e
+	}
+	return idx
+}
+
+// entryFromInfo 由归档名与文件信息构造指纹条目。
+func entryFromInfo(archiveName string, info os.FileInfo) ManifestEntry {
+	return ManifestEntry{
+		Path:      filepath.ToSlash(archiveName),
+		Size:      info.Size(),
+		ModTimeNs: info.ModTime().UnixNano(),
+		Mode:      uint32(info.Mode().Perm()),
+		IsDir:     info.IsDir(),
+	}
+}
+
+// changedSince 判断当前条目相对基线是否为「新增或变更」（即应纳入差异归档）。
+//   - 不在基线中 → 新增，纳入；
+//   - 已存在的目录 → 不携带数据，跳过（其下变更文件会各自判定）；
+//   - 文件大小或 mtime 变化 → 变更，纳入（rsync 风格启发式）。
+func changedSince(base map[string]ManifestEntry, cur ManifestEntry) bool {
+	prev, ok := base[cur.Path]
+	if !ok {
+		return true
+	}
+	if cur.IsDir {
+		return false
+	}
+	return prev.Size != cur.Size || prev.ModTimeNs != cur.ModTimeNs
+}
+
+// deletedPaths 返回基线中存在、但本次遍历未出现的路径（被删除的条目），按路径升序。
+func deletedPaths(base map[string]ManifestEntry, seen map[string]struct{}) []string {
+	deleted := make([]string, 0)
+	for p := range base {
+		if _, ok := seen[p]; !ok {
+			deleted = append(deleted, p)
+		}
+	}
+	sort.Strings(deleted)
+	return deleted
+}
--- a/server/internal/backup/manifest_test.go
+++ b/server/internal/backup/manifest_test.go
@@ -0,0 +1,79 @@
+package backup
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestEncodeDecodeManifestRoundTrip(t *testing.T) {
+	m := Manifest{Entries: []ManifestEntry{
+		{Path: "src/a.txt", Size: 10, ModTimeNs: 100, Mode: 0o644},
+		{Path: "src", Size: 0, ModTimeNs: 50, Mode: 0o755, IsDir: true},
+	}}
+	data, err := EncodeManifest(m)
+	if err != nil {
+		t.Fatalf("EncodeManifest: %v", err)
+	}
+	got, err := DecodeManifest(data)
+	if err != nil {
+		t.Fatalf("DecodeManifest: %v", err)
+	}
+	if !reflect.DeepEqual(got, m) {
+		t.Fatalf("roundtrip mismatch:\n got %#v\nwant %#v", got, m)
+	}
+}
+
+func TestDecodeManifestEmpty(t *testing.T) {
+	got, err := DecodeManifest(nil)
+	if err != nil {
+		t.Fatalf("DecodeManifest(nil): %v", err)
+	}
+	if len(got.Entries) != 0 {
+		t.Fatalf("expected empty manifest, got %#v", got)
+	}
+}
+
+func TestChangedSince(t *testing.T) {
+	base := Manifest{Entries: []ManifestEntry{
+		{Path: "a.txt", Size: 10, ModTimeNs: 100},
+		{Path: "dir", IsDir: true, ModTimeNs: 100},
+	}}.index()
+
+	cases := []struct {
+		name string
+		cur  ManifestEntry
+		want bool
+	}{
+		{"unchanged file", ManifestEntry{Path: "a.txt", Size: 10, ModTimeNs: 100}, false},
+		{"size changed", ManifestEntry{Path: "a.txt", Size: 11, ModTimeNs: 100}, true},
+		{"mtime changed", ManifestEntry{Path: "a.txt", Size: 10, ModTimeNs: 200}, true},
+		{"new file", ManifestEntry{Path: "b.txt", Size: 1, ModTimeNs: 1}, true},
+		{"existing dir skipped", ManifestEntry{Path: "dir", IsDir: true, ModTimeNs: 999}, false},
+		{"new dir included", ManifestEntry{Path: "newdir", IsDir: true, ModTimeNs: 1}, true},
+	}
+	for _, tc := range cases {
+		if got := changedSince(base, tc.cur); got != tc.want {
+			t.Errorf("%s: changedSince=%v want %v", tc.name, got, tc.want)
+		}
+	}
+}
+
+func TestDeletedPaths(t *testing.T) {
+	base := Manifest{Entries: []ManifestEntry{
+		{Path: "a"}, {Path: "b"}, {Path: "c"},
+	}}.index()
+	seen := map[string]struct{}{"a": {}, "c": {}}
+	got := deletedPaths(base, seen)
+	want := []string{"b"}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("deletedPaths=%v want %v", got, want)
+	}
+}
+
+func TestDeletedPathsNoneWhenAllSeen(t *testing.T) {
+	base := Manifest{Entries: []ManifestEntry{{Path: "a"}, {Path: "b"}}}.index()
+	seen := map[string]struct{}{"a": {}, "b": {}}
+	if got := deletedPaths(base, seen); len(got) != 0 {
+		t.Fatalf("expected no deletions, got %v", got)
+	}
+}
--- a/server/internal/backup/mongodb_runner.go
+++ b/server/internal/backup/mongodb_runner.go
@@ -0,0 +1,119 @@
+package backup
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// MongoDBRunner 通过 mongodump/mongorestore 备份与恢复 MongoDB 数据库。
+// 采用 --archive 流式模式（dump 写 stdout、restore 读 stdin），与 MySQLRunner
+// 的 mysqldump/mysql 管线保持一致；产物为未压缩的 mongo archive，由备份管线统一压缩/加密。
+type MongoDBRunner struct {
+	executor CommandExecutor
+}
+
+func NewMongoDBRunner(executor CommandExecutor) *MongoDBRunner {
+	if executor == nil {
+		executor = NewOSCommandExecutor()
+	}
+	return &MongoDBRunner{executor: executor}
+}
+
+func (r *MongoDBRunner) Type() string {
+	return "mongodb"
+}
+
+func (r *MongoDBRunner) Run(ctx context.Context, task TaskSpec, writer LogWriter) (*RunResult, error) {
+	if _, err := r.executor.LookPath("mongodump"); err != nil {
+		return nil, fmt.Errorf("未找到 mongodump 命令 (请确保服务器已安装 mongodb-database-tools)")
+	}
+	startedAt := task.StartedAt
+	if startedAt.IsZero() {
+		startedAt = time.Now().UTC()
+	}
+	tempDir, err := CreateTaskTempDir(task.Name, startedAt)
+	if err != nil {
+		return nil, err
+	}
+	fileName := BuildArtifactName(task.Name, startedAt, "archive")
+	artifactPath := filepath.Join(tempDir, fileName)
+	file, err := os.Create(artifactPath)
+	if err != nil {
+		return nil, fmt.Errorf("create mongodump archive file: %w", err)
+	}
+	defer file.Close()
+
+	args := mongoConnArgs(task.Database)
+	dbNames := normalizeDatabaseNames(task.Database.Names)
+	if len(dbNames) == 1 {
+		args = append(args, "--db", dbNames[0])
+		writer.WriteLine(fmt.Sprintf("备份数据库: %s", dbNames[0]))
+	} else {
+		writer.WriteLine("备份全部数据库")
+	}
+	args = append(args, "--archive") // 归档流式写入 stdout
+
+	writer.WriteLine(fmt.Sprintf("连接到 MongoDB: %s:%d", task.Database.Host, task.Database.Port))
+	stderrWriter := newLogLineWriter(writer, "mongodump")
+	writer.WriteLine("开始执行 mongodump")
+	if err := r.executor.Run(ctx, "mongodump", args, CommandOptions{Stdout: file, Stderr: stderrWriter}); err != nil {
+		return nil, fmt.Errorf("run mongodump: %w: %s", err, stderrWriter.collected())
+	}
+	info, err := file.Stat()
+	if err != nil {
+		return nil, fmt.Errorf("stat mongodump archive: %w", err)
+	}
+	if info.Size() == 0 {
+		return nil, fmt.Errorf("mongodump 产物为空，请检查数据库连接与权限")
+	}
+	writer.WriteLine(fmt.Sprintf("MongoDB 导出完成（文件大小: %s）", formatFileSize(info.Size())))
+	return &RunResult{ArtifactPath: artifactPath, FileName: fileName, TempDir: tempDir, Size: info.Size(), StorageKey: BuildStorageKey("mongodb", startedAt, fileName)}, nil
+}
+
+func (r *MongoDBRunner) Restore(ctx context.Context, task TaskSpec, artifactPath string, writer LogWriter) error {
+	if _, err := r.executor.LookPath("mongorestore"); err != nil {
+		return fmt.Errorf("未找到 mongorestore 命令 (请确保服务器已安装 mongodb-database-tools)")
+	}
+	input, err := os.Open(filepath.Clean(artifactPath))
+	if err != nil {
+		return fmt.Errorf("open mongodb restore archive: %w", err)
+	}
+	defer input.Close()
+
+	args := mongoConnArgs(task.Database)
+	// --drop：恢复前删除同名集合，保证恢复后与归档一致（与 mysql 恢复的整库覆盖语义对齐）。
+	args = append(args, "--drop", "--archive")
+	stderr := &bytes.Buffer{}
+	writer.WriteLine("开始执行 mongorestore")
+	if err := r.executor.Run(ctx, "mongorestore", args, CommandOptions{Stdin: input, Stderr: stderr}); err != nil {
+		return fmt.Errorf("run mongorestore: %w: %s", err, strings.TrimSpace(stderr.String()))
+	}
+	writer.WriteLine("MongoDB 恢复完成")
+	return nil
+}
+
+// mongoConnArgs 构造 mongodump/mongorestore 的连接与认证参数。
+// 注意：mongodb-database-tools 无类似 MYSQL_PWD 的密码环境变量，密码只能经 --password 传入；
+// 认证库默认 admin（绝大多数部署的管理账号所在库）。
+func mongoConnArgs(db DatabaseSpec) []string {
+	args := make([]string, 0, 8)
+	if strings.TrimSpace(db.Host) != "" {
+		args = append(args, "--host", db.Host)
+	}
+	if db.Port > 0 {
+		args = append(args, "--port", strconv.Itoa(db.Port))
+	}
+	if strings.TrimSpace(db.User) != "" {
+		args = append(args, "--username", db.User, "--authenticationDatabase", "admin")
+		if strings.TrimSpace(db.Password) != "" {
+			args = append(args, "--password", db.Password)
+		}
+	}
+	return args
+}
--- a/server/internal/backup/mongodb_runner_test.go
+++ b/server/internal/backup/mongodb_runner_test.go
@@ -0,0 +1,102 @@
+package backup
+
+import (
+	"context"
+	"errors"
+	"io"
+	"os"
+	"strings"
+	"testing"
+)
+
+func argIndex(args []string, target string) int {
+	for i, a := range args {
+		if a == target {
+			return i
+		}
+	}
+	return -1
+}
+
+func TestMongoDBRunnerRunUsesMongodump(t *testing.T) {
+	executor := &fakeCommandExecutor{runFunc: func(name string, args []string, options CommandOptions) error {
+		if options.Stdout != nil {
+			_, _ = io.WriteString(options.Stdout, "mongo archive bytes")
+		}
+		return nil
+	}}
+	runner := NewMongoDBRunner(executor)
+	result, err := runner.Run(context.Background(), TaskSpec{Name: "mongo", Type: "mongodb", Database: DatabaseSpec{Host: "127.0.0.1", Port: 27017, User: "admin", Password: "secret", Names: []string{"app"}}}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("Run returned error: %v", err)
+	}
+	if executor.lastName != "mongodump" {
+		t.Fatalf("expected mongodump, got %s", executor.lastName)
+	}
+	args := executor.lastArgs
+	if argIndex(args, "--archive") < 0 {
+		t.Fatalf("expected --archive flag, got %#v", args)
+	}
+	if i := argIndex(args, "--db"); i < 0 || i+1 >= len(args) || args[i+1] != "app" {
+		t.Fatalf("expected --db app, got %#v", args)
+	}
+	if i := argIndex(args, "--username"); i < 0 || args[i+1] != "admin" {
+		t.Fatalf("expected --username admin, got %#v", args)
+	}
+	if argIndex(args, "--authenticationDatabase") < 0 || argIndex(args, "--password") < 0 {
+		t.Fatalf("expected auth args, got %#v", args)
+	}
+	if _, err := os.Stat(result.ArtifactPath); err != nil {
+		t.Fatalf("artifact file missing: %v", err)
+	}
+	if result.StorageKey == "" || !strings.HasSuffix(result.FileName, ".archive") {
+		t.Fatalf("unexpected result metadata: %#v", result)
+	}
+}
+
+func TestMongoDBRunnerRunBackupsAllWhenNoDatabase(t *testing.T) {
+	executor := &fakeCommandExecutor{runFunc: func(name string, args []string, options CommandOptions) error {
+		_, _ = io.WriteString(options.Stdout, "all dbs")
+		return nil
+	}}
+	runner := NewMongoDBRunner(executor)
+	_, err := runner.Run(context.Background(), TaskSpec{Name: "mongo", Type: "mongodb", Database: DatabaseSpec{Host: "127.0.0.1", Port: 27017}}, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("Run returned error: %v", err)
+	}
+	if argIndex(executor.lastArgs, "--db") >= 0 {
+		t.Fatalf("expected no --db when backing up all databases, got %#v", executor.lastArgs)
+	}
+}
+
+func TestMongoDBRunnerRunRejectsEmptyOutput(t *testing.T) {
+	executor := &fakeCommandExecutor{} // runFunc nil → writes nothing
+	runner := NewMongoDBRunner(executor)
+	_, err := runner.Run(context.Background(), TaskSpec{Name: "mongo", Type: "mongodb", Database: DatabaseSpec{Host: "127.0.0.1", Port: 27017, Names: []string{"app"}}}, NopLogWriter{})
+	if err == nil {
+		t.Fatal("expected error for empty mongodump output")
+	}
+}
+
+func TestMongoDBRunnerRestoreUsesMongorestore(t *testing.T) {
+	executor := &fakeCommandExecutor{}
+	runner := NewMongoDBRunner(executor)
+	artifact := filepathJoinTempFile(t, "dump.archive", "mongo archive bytes")
+	if err := runner.Restore(context.Background(), TaskSpec{Name: "mongo", Type: "mongodb", Database: DatabaseSpec{Host: "127.0.0.1", Port: 27017, User: "admin", Password: "secret"}}, artifact, NopLogWriter{}); err != nil {
+		t.Fatalf("Restore returned error: %v", err)
+	}
+	if executor.lastName != "mongorestore" {
+		t.Fatalf("expected mongorestore, got %s", executor.lastName)
+	}
+	if argIndex(executor.lastArgs, "--drop") < 0 || argIndex(executor.lastArgs, "--archive") < 0 {
+		t.Fatalf("expected --drop --archive, got %#v", executor.lastArgs)
+	}
+}
+
+func TestMongoDBRunnerRunReturnsLookupError(t *testing.T) {
+	runner := NewMongoDBRunner(&fakeCommandExecutor{lookupErr: errors.New("missing")})
+	_, err := runner.Run(context.Background(), TaskSpec{Name: "mongo", Type: "mongodb", Database: DatabaseSpec{Host: "127.0.0.1", Port: 27017, Names: []string{"app"}}}, NopLogWriter{})
+	if err == nil {
+		t.Fatal("expected error when mongodump is missing")
+	}
+}
--- a/server/internal/backup/repository.go
+++ b/server/internal/backup/repository.go
--- a/server/internal/backup/repository_chunker.go
+++ b/server/internal/backup/repository_chunker.go
@@ -0,0 +1,131 @@
+package backup
+
+import (
+	"context"
+	"fmt"
+	"io"
+)
+
+const (
+	repositoryChunkMin = 512 << 10
+	repositoryChunkAvg = 1 << 20
+	repositoryChunkMax = 4 << 20
+)
+
+// contentDefinedChunker implements the normalized FastCDC cut-point strategy.
+// The rolling Gear hash only retains the latest 64 bytes through uint64
+// overflow, so chunk boundaries re-synchronize after insertions or deletions.
+type contentDefinedChunker struct {
+	minSize   int
+	avgSize   int
+	maxSize   int
+	smallMask uint64
+	largeMask uint64
+	gear      [256]uint64
+}
+
+func newContentDefinedChunker() *contentDefinedChunker {
+	chunker := &contentDefinedChunker{
+		minSize:   repositoryChunkMin,
+		avgSize:   repositoryChunkAvg,
+		maxSize:   repositoryChunkMax,
+		smallMask: (1 << 21) - 1,
+		largeMask: (1 << 19) - 1,
+	}
+
+	// SplitMix64 produces a stable, well-distributed Gear table. The seed and
+	// generation algorithm are part of repository format v1 and must not change.
+	seed := uint64(0x6a09e667f3bcc909)
+	for i := range chunker.gear {
+		seed += 0x9e3779b97f4a7c15
+		value := seed
+		value = (value ^ (value >> 30)) * 0xbf58476d1ce4e5b9
+		value = (value ^ (value >> 27)) * 0x94d049bb133111eb
+		chunker.gear[i] = value ^ (value >> 31)
+	}
+	return chunker
+}
+
+func (c *contentDefinedChunker) Split(ctx context.Context, reader io.Reader, emit func([]byte) error) error {
+	if reader == nil || emit == nil {
+		return fmt.Errorf("chunk reader and emitter are required")
+	}
+
+	pending := make([]byte, 0, c.maxSize+(256<<10))
+	readBuffer := make([]byte, 256<<10)
+	eof := false
+	for {
+		if !eof {
+			readCount, readErr := reader.Read(readBuffer)
+			if readCount > 0 {
+				pending = append(pending, readBuffer[:readCount]...)
+			}
+			switch readErr {
+			case nil:
+			case io.EOF:
+				eof = true
+			default:
+				return fmt.Errorf("read source for chunking: %w", readErr)
+			}
+			if readCount == 0 && readErr == nil {
+				continue
+			}
+		}
+
+		for len(pending) > 0 {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+			cut := c.findCutPoint(pending, eof)
+			if cut == 0 {
+				break
+			}
+			chunk := make([]byte, cut)
+			copy(chunk, pending[:cut])
+			if err := emit(chunk); err != nil {
+				return err
+			}
+			copy(pending, pending[cut:])
+			pending = pending[:len(pending)-cut]
+		}
+
+		if eof {
+			if len(pending) != 0 {
+				return fmt.Errorf("chunker stopped with %d buffered bytes", len(pending))
+			}
+			return nil
+		}
+	}
+}
+
+func (c *contentDefinedChunker) findCutPoint(data []byte, eof bool) int {
+	if len(data) < c.minSize {
+		if eof {
+			return len(data)
+		}
+		return 0
+	}
+
+	limit := len(data)
+	if limit > c.maxSize {
+		limit = c.maxSize
+	}
+	var hash uint64
+	for index := c.minSize; index < limit; index++ {
+		hash = (hash << 1) + c.gear[data[index]]
+		mask := c.largeMask
+		if index < c.avgSize {
+			mask = c.smallMask
+		}
+		if hash&mask == 0 {
+			return index + 1
+		}
+	}
+	if len(data) >= c.maxSize {
+		return c.maxSize
+	}
+	if eof {
+		return len(data)
+	}
+	return 0
+}
--- a/server/internal/backup/repository_test.go
+++ b/server/internal/backup/repository_test.go
@@ -0,0 +1,414 @@
+package backup
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"backupx/server/internal/storage"
+)
+
+func TestContentDefinedChunkerResynchronizesAfterInsertion(t *testing.T) {
+	source := make([]byte, 8<<20)
+	if _, err := rand.New(rand.NewSource(42)).Read(source); err != nil {
+		t.Fatalf("generate source: %v", err)
+	}
+	modified := make([]byte, 0, len(source)+4096)
+	modified = append(modified, source[:2<<20]...)
+	modified = append(modified, bytes.Repeat([]byte("inserted"), 512)...)
+	modified = append(modified, source[2<<20:]...)
+
+	chunker := newContentDefinedChunker()
+	collect := func(data []byte) map[string]struct{} {
+		t.Helper()
+		ids := make(map[string]struct{})
+		err := chunker.Split(context.Background(), bytes.NewReader(data), func(chunk []byte) error {
+			digest := sha256.Sum256(chunk)
+			ids[fmt.Sprintf("%x", digest[:])] = struct{}{}
+			if len(chunk) > repositoryChunkMax {
+				return fmt.Errorf("chunk exceeds maximum: %d", len(chunk))
+			}
+			return nil
+		})
+		if err != nil {
+			t.Fatalf("split chunks: %v", err)
+		}
+		return ids
+	}
+	originalChunks := collect(source)
+	modifiedChunks := collect(modified)
+	shared := 0
+	for chunkID := range originalChunks {
+		if _, ok := modifiedChunks[chunkID]; ok {
+			shared++
+		}
+	}
+	if shared < len(originalChunks)/2 {
+		t.Fatalf("content-defined boundaries did not resynchronize: shared=%d original=%d", shared, len(originalChunks))
+	}
+}
+
+func TestRepositoryRoundTripDedupAndPrune(t *testing.T) {
+	ctx := context.Background()
+	tempDir := t.TempDir()
+	sourceDir := filepath.Join(tempDir, "dataset")
+	if err := os.MkdirAll(filepath.Join(sourceDir, "empty"), 0o755); err != nil {
+		t.Fatalf("create source: %v", err)
+	}
+	original := make([]byte, 6<<20)
+	if _, err := rand.New(rand.NewSource(7)).Read(original); err != nil {
+		t.Fatalf("generate fixture: %v", err)
+	}
+	primaryPath := filepath.Join(sourceDir, "primary.bin")
+	duplicatePath := filepath.Join(sourceDir, "duplicate.bin")
+	if err := os.WriteFile(primaryPath, original, 0o640); err != nil {
+		t.Fatalf("write primary: %v", err)
+	}
+	if err := os.WriteFile(duplicatePath, original, 0o640); err != nil {
+		t.Fatalf("write duplicate: %v", err)
+	}
+
+	key := sha256.Sum256([]byte("repository-test-key"))
+	store := NewRepositoryStore(key[:])
+	provider := newMemoryRepositoryProvider()
+	task := TaskSpec{
+		ID:          12,
+		Name:        "repository-test",
+		Type:        "file",
+		SourcePaths: []string{sourceDir},
+		Compression: "zstd",
+		Encrypt:     true,
+		StartedAt:   time.Date(2026, 8, 6, 1, 2, 3, 0, time.UTC),
+		TempDir:     tempDir,
+	}
+
+	firstPlan, err := store.BuildPlan(ctx, task, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("build first plan: %v", err)
+	}
+	firstKey := store.SnapshotKey(task.ID, 1, task.StartedAt)
+	firstResult, err := store.Upload(ctx, provider, firstPlan, firstKey)
+	if closeErr := firstPlan.Close(); closeErr != nil {
+		t.Fatalf("close first plan: %v", closeErr)
+	}
+	if err != nil {
+		t.Fatalf("upload first snapshot: %v", err)
+	}
+	if firstResult.NewChunks == 0 || firstResult.UniqueChunks == 0 {
+		t.Fatalf("first upload did not create chunks: %+v", firstResult)
+	}
+	if firstPlan.UniqueSize >= firstPlan.LogicalSize {
+		t.Fatalf("duplicate file was not deduplicated within plan: unique=%d logical=%d", firstPlan.UniqueSize, firstPlan.LogicalSize)
+	}
+
+	modified := make([]byte, 0, len(original)+4096)
+	modified = append(modified, original[:2<<20]...)
+	modified = append(modified, bytes.Repeat([]byte("changed!"), 512)...)
+	modified = append(modified, original[2<<20:]...)
+	if err := os.WriteFile(primaryPath, modified, 0o640); err != nil {
+		t.Fatalf("modify primary: %v", err)
+	}
+	task.StartedAt = task.StartedAt.Add(time.Hour)
+	secondPlan, err := store.BuildPlan(ctx, task, NopLogWriter{})
+	if err != nil {
+		t.Fatalf("build second plan: %v", err)
+	}
+	secondKey := store.SnapshotKey(task.ID, 2, task.StartedAt)
+	secondResult, err := store.Upload(ctx, provider, secondPlan, secondKey)
+	if closeErr := secondPlan.Close(); closeErr != nil {
+		t.Fatalf("close second plan: %v", closeErr)
+	}
+	if err != nil {
+		t.Fatalf("upload second snapshot: %v", err)
+	}
+	if secondResult.ReusedBytes <= secondResult.LogicalSize/3 {
+		t.Fatalf("second snapshot reused too little data: %+v", secondResult)
+	}
+	if secondResult.UploadedBytes >= secondResult.LogicalSize {
+		t.Fatalf("incremental upload was not smaller than logical data: %+v", secondResult)
+	}
+
+	verify, err := store.Verify(ctx, provider, secondKey, secondResult.Checksum)
+	if err != nil {
+		t.Fatalf("verify repository: %v", err)
+	}
+	if verify.Chunks == 0 || verify.Bytes == 0 {
+		t.Fatalf("empty verification result: %+v", verify)
+	}
+
+	restoreRoot := filepath.Join(tempDir, "restore")
+	restoreTask := task
+	restoreTask.RestoreTargetPath = restoreRoot
+	if err := store.Restore(ctx, provider, secondKey, strings.Repeat("0", sha256.Size*2), restoreTask, NopLogWriter{}); err == nil {
+		t.Fatal("restore accepted a mismatched snapshot checksum")
+	}
+	if err := store.Restore(ctx, provider, secondKey, "", restoreTask, NopLogWriter{}); err == nil {
+		t.Fatal("restore accepted a missing snapshot checksum")
+	}
+	if err := store.Restore(ctx, provider, secondKey, secondResult.Checksum, restoreTask, NopLogWriter{}); err != nil {
+		t.Fatalf("restore snapshot: %v", err)
+	}
+	restored, err := os.ReadFile(filepath.Join(restoreRoot, filepath.Base(sourceDir), "primary.bin"))
+	if err != nil {
+		t.Fatalf("read restored primary: %v", err)
+	}
+	if !bytes.Equal(restored, modified) {
+		t.Fatalf("restored primary differs from source")
+	}
+	if info, err := os.Stat(filepath.Join(restoreRoot, filepath.Base(sourceDir), "empty")); err != nil || !info.IsDir() {
+		t.Fatalf("empty directory was not restored: info=%v err=%v", info, err)
+	}
+
+	if err := provider.Delete(ctx, firstKey); err != nil {
+		t.Fatalf("delete first snapshot: %v", err)
+	}
+	if _, err := store.Prune(ctx, provider); err != nil {
+		t.Fatalf("prune with live snapshot: %v", err)
+	}
+	if err := provider.Delete(ctx, secondKey); err != nil {
+		t.Fatalf("delete second snapshot: %v", err)
+	}
+	pruned, err := store.Prune(ctx, provider)
+	if err != nil {
+		t.Fatalf("prune empty repository: %v", err)
+	}
+	if pruned.DeletedPacks == 0 || pruned.DeletedIndexes == 0 {
+		t.Fatalf("prune did not reclaim repository data: %+v", pruned)
+	}
+	if objects, err := provider.List(ctx, repositoryPackPrefix); err != nil || len(objects) != 0 {
+		t.Fatalf("packs remain after prune: objects=%v err=%v", objects, err)
+	}
+}
+
+func TestRepositoryRestoreRejectsUnsafeSnapshotMetadata(t *testing.T) {
+	cases := []struct {
+		name    string
+		entries []repositoryEntry
+	}{
+		{
+			name:    "path traversal",
+			entries: []repositoryEntry{{Path: "../escape", Kind: "directory", Mode: 0o755}},
+		},
+		{
+			name: "entry below symlink",
+			entries: []repositoryEntry{
+				{Path: "link", Kind: "symlink", Mode: 0o777, LinkTarget: "inside"},
+				{Path: "link/payload", Kind: "file", Mode: 0o600, Size: 1, Chunks: []string{"p-" + strings.Repeat("0", sha256.Size*2)}},
+			},
+		},
+		{
+			name:    "escaping symlink target",
+			entries: []repositoryEntry{{Path: "escape", Kind: "symlink", Mode: 0o777, LinkTarget: "../outside"}},
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			ctx := context.Background()
+			store := NewRepositoryStore(nil)
+			provider := newMemoryRepositoryProvider()
+			snapshot := repositorySnapshot{
+				Version:     repositoryFormatVersion,
+				TaskID:      1,
+				CreatedAt:   time.Now().UTC(),
+				Compression: "none",
+				Entries:     tc.entries,
+			}
+			data, err := store.encodeSnapshot(snapshot)
+			if err != nil {
+				t.Fatalf("encodeSnapshot returned error: %v", err)
+			}
+			key := store.SnapshotKey(1, 1, snapshot.CreatedAt)
+			if err := provider.Upload(ctx, key, bytes.NewReader(data), int64(len(data)), nil); err != nil {
+				t.Fatalf("Upload snapshot returned error: %v", err)
+			}
+			digest := sha256.Sum256(data)
+			task := TaskSpec{SourcePath: filepath.Join(t.TempDir(), "source"), RestoreTargetPath: filepath.Join(t.TempDir(), "restore")}
+			if err := store.Restore(ctx, provider, key, fmt.Sprintf("%x", digest[:]), task, NopLogWriter{}); err == nil {
+				t.Fatal("restore accepted unsafe snapshot metadata")
+			}
+		})
+	}
+}
+
+func TestRepositoryRestorePreservesDirectoryWhenSnapshotContainsSymlink(t *testing.T) {
+	ctx := context.Background()
+	store := NewRepositoryStore(nil)
+	provider := newMemoryRepositoryProvider()
+	snapshot := repositorySnapshot{
+		Version:     repositoryFormatVersion,
+		TaskID:      1,
+		CreatedAt:   time.Now().UTC(),
+		Compression: "none",
+		Entries:     []repositoryEntry{{Path: "link", Kind: "symlink", Mode: 0o777, LinkTarget: "inside"}},
+	}
+	data, err := store.encodeSnapshot(snapshot)
+	if err != nil {
+		t.Fatalf("encodeSnapshot returned error: %v", err)
+	}
+	key := store.SnapshotKey(1, 1, snapshot.CreatedAt)
+	if err := provider.Upload(ctx, key, bytes.NewReader(data), int64(len(data)), nil); err != nil {
+		t.Fatalf("Upload snapshot returned error: %v", err)
+	}
+	digest := sha256.Sum256(data)
+	restoreRoot := filepath.Join(t.TempDir(), "restore")
+	markerPath := filepath.Join(restoreRoot, "link", "keep.txt")
+	if err := os.MkdirAll(filepath.Dir(markerPath), 0o755); err != nil {
+		t.Fatalf("MkdirAll marker parent: %v", err)
+	}
+	if err := os.WriteFile(markerPath, []byte("keep"), 0o600); err != nil {
+		t.Fatalf("WriteFile marker: %v", err)
+	}
+	task := TaskSpec{SourcePath: filepath.Join(t.TempDir(), "source"), RestoreTargetPath: restoreRoot}
+	if err := store.Restore(ctx, provider, key, fmt.Sprintf("%x", digest[:]), task, NopLogWriter{}); err == nil {
+		t.Fatal("restore replaced an existing directory with a symlink")
+	}
+	if data, err := os.ReadFile(markerPath); err != nil || string(data) != "keep" {
+		t.Fatalf("existing directory content changed: data=%q err=%v", data, err)
+	}
+}
+
+func TestRepositoryRejectsOversizedChunkLocation(t *testing.T) {
+	ctx := context.Background()
+	store := NewRepositoryStore(nil)
+	provider := newMemoryRepositoryProvider()
+	chunkID := "p-" + strings.Repeat("0", sha256.Size*2)
+	packID := strings.Repeat("a", sha256.Size*2)
+	segment := repositoryIndexSegment{
+		Version: repositoryFormatVersion,
+		Pack:    fmt.Sprintf("%s/%s/%s.pack", repositoryPackPrefix, packID[:2], packID),
+		Chunks: map[string]repositoryChunkLocation{
+			chunkID: {Pack: fmt.Sprintf("%s/%s/%s.pack", repositoryPackPrefix, packID[:2], packID), Offset: 0, Length: repositoryMaxEncoded + 1, PlainSize: 1, Compression: "none"},
+		},
+	}
+	data, err := json.Marshal(segment)
+	if err != nil {
+		t.Fatalf("Marshal index returned error: %v", err)
+	}
+	indexKey := fmt.Sprintf("%s/%s.json", repositoryIndexPrefix, packID)
+	if err := provider.Upload(ctx, indexKey, bytes.NewReader(data), int64(len(data)), nil); err != nil {
+		t.Fatalf("Upload index returned error: %v", err)
+	}
+	if _, err := store.loadIndex(ctx, provider); err == nil {
+		t.Fatal("loadIndex accepted an oversized encoded chunk")
+	}
+}
+
+func TestRepositoryRejectsIndexPackMismatch(t *testing.T) {
+	ctx := context.Background()
+	store := NewRepositoryStore(nil)
+	provider := newMemoryRepositoryProvider()
+	chunkID := "p-" + strings.Repeat("0", sha256.Size*2)
+	indexID := strings.Repeat("a", sha256.Size*2)
+	otherPackID := strings.Repeat("b", sha256.Size*2)
+	expectedPack := fmt.Sprintf("%s/%s/%s.pack", repositoryPackPrefix, indexID[:2], indexID)
+	segment := repositoryIndexSegment{
+		Version: repositoryFormatVersion,
+		Pack:    expectedPack,
+		Chunks: map[string]repositoryChunkLocation{
+			chunkID: {
+				Pack:        fmt.Sprintf("%s/%s/%s.pack", repositoryPackPrefix, otherPackID[:2], otherPackID),
+				Offset:      0,
+				Length:      1,
+				PlainSize:   1,
+				Compression: "none",
+			},
+		},
+	}
+	data, err := json.Marshal(segment)
+	if err != nil {
+		t.Fatalf("Marshal index returned error: %v", err)
+	}
+	indexKey := fmt.Sprintf("%s/%s.json", repositoryIndexPrefix, indexID)
+	if err := provider.Upload(ctx, indexKey, bytes.NewReader(data), int64(len(data)), nil); err != nil {
+		t.Fatalf("Upload index returned error: %v", err)
+	}
+	if _, err := store.loadIndex(ctx, provider); err == nil {
+		t.Fatal("loadIndex accepted a chunk location pointing to a different pack")
+	}
+}
+
+type memoryRepositoryProvider struct {
+	mu      sync.RWMutex
+	objects map[string][]byte
+	times   map[string]time.Time
+}
+
+func newMemoryRepositoryProvider() *memoryRepositoryProvider {
+	return &memoryRepositoryProvider{objects: make(map[string][]byte), times: make(map[string]time.Time)}
+}
+
+func (p *memoryRepositoryProvider) Type() storage.ProviderType           { return "memory" }
+func (p *memoryRepositoryProvider) TestConnection(context.Context) error { return nil }
+
+func (p *memoryRepositoryProvider) Upload(_ context.Context, key string, reader io.Reader, size int64, _ map[string]string) error {
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		return err
+	}
+	if int64(len(data)) != size {
+		return fmt.Errorf("size mismatch for %s: %d != %d", key, len(data), size)
+	}
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	p.objects[key] = append([]byte(nil), data...)
+	p.times[key] = time.Now().UTC()
+	return nil
+}
+
+func (p *memoryRepositoryProvider) Download(_ context.Context, key string) (io.ReadCloser, error) {
+	p.mu.RLock()
+	defer p.mu.RUnlock()
+	data, ok := p.objects[key]
+	if !ok {
+		return nil, fmt.Errorf("object %s not found", key)
+	}
+	return io.NopCloser(bytes.NewReader(append([]byte(nil), data...))), nil
+}
+
+func (p *memoryRepositoryProvider) DownloadRange(_ context.Context, key string, offset, length int64) (io.ReadCloser, error) {
+	p.mu.RLock()
+	defer p.mu.RUnlock()
+	data, ok := p.objects[key]
+	if !ok {
+		return nil, fmt.Errorf("object %s not found", key)
+	}
+	if offset < 0 || length <= 0 || offset+length > int64(len(data)) {
+		return nil, fmt.Errorf("invalid range %d:%d for %s", offset, length, key)
+	}
+	return io.NopCloser(bytes.NewReader(append([]byte(nil), data[offset:offset+length]...))), nil
+}
+
+func (p *memoryRepositoryProvider) Delete(_ context.Context, key string) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if _, ok := p.objects[key]; !ok {
+		return fmt.Errorf("object %s not found", key)
+	}
+	delete(p.objects, key)
+	delete(p.times, key)
+	return nil
+}
+
+func (p *memoryRepositoryProvider) List(_ context.Context, prefix string) ([]storage.ObjectInfo, error) {
+	p.mu.RLock()
+	defer p.mu.RUnlock()
+	result := make([]storage.ObjectInfo, 0)
+	for key, data := range p.objects {
+		if strings.HasPrefix(key, prefix) {
+			result = append(result, storage.ObjectInfo{Key: key, Size: int64(len(data)), UpdatedAt: p.times[key]})
+		}
+	}
+	sort.Slice(result, func(i, j int) bool { return result[i].Key < result[j].Key })
+	return result, nil
+}
--- a/server/internal/backup/retention/differential_test.go
+++ b/server/internal/backup/retention/differential_test.go
@@ -0,0 +1,55 @@
+package retention
+
+import (
+	"testing"
+
+	"backupx/server/internal/model"
+)
+
+func retentionRecIDs(records []model.BackupRecord) []uint {
+	ids := make([]uint, 0, len(records))
+	for _, r := range records {
+		ids = append(ids, r.ID)
+	}
+	return ids
+}
+
+// 基线全量仍被「不在删除集合中的差异」依赖 → 必须保留，否则差异无法恢复。
+func TestProtectDifferentialBasesKeepsBaseWithSurvivingDiff(t *testing.T) {
+	all := []model.BackupRecord{
+		{ID: 1, BackupKind: model.BackupKindFull},
+		{ID: 2, BackupKind: model.BackupKindDifferential, BaseRecordID: 1},
+	}
+	candidates := []model.BackupRecord{{ID: 1, BackupKind: model.BackupKindFull}}
+	if got := protectDifferentialBases(all, candidates); len(got) != 0 {
+		t.Fatalf("base with surviving diff must be protected, got %v", retentionRecIDs(got))
+	}
+}
+
+// 基线全量与其全部差异都在删除集合中 → 可一并删除（无残留差异失去基线）。
+func TestProtectDifferentialBasesDeletesBaseWhenDiffAlsoDeleted(t *testing.T) {
+	all := []model.BackupRecord{
+		{ID: 1, BackupKind: model.BackupKindFull},
+		{ID: 2, BackupKind: model.BackupKindDifferential, BaseRecordID: 1},
+	}
+	candidates := []model.BackupRecord{
+		{ID: 1, BackupKind: model.BackupKindFull},
+		{ID: 2, BackupKind: model.BackupKindDifferential, BaseRecordID: 1},
+	}
+	if got := protectDifferentialBases(all, candidates); len(got) != 2 {
+		t.Fatalf("base+diff both expired should both be deleted, got %v", retentionRecIDs(got))
+	}
+}
+
+// 无差异备份时原样透传（不影响既有全量保留逻辑）。
+func TestProtectDifferentialBasesNoDiffsPassThrough(t *testing.T) {
+	all := []model.BackupRecord{
+		{ID: 1, BackupKind: model.BackupKindFull},
+		{ID: 2, BackupKind: model.BackupKindFull},
+	}
+	candidates := []model.BackupRecord{{ID: 1, BackupKind: model.BackupKindFull}}
+	got := protectDifferentialBases(all, candidates)
+	if len(got) != 1 || got[0].ID != 1 {
+		t.Fatalf("no diffs should pass through unchanged, got %v", retentionRecIDs(got))
+	}
+}
--- a/server/internal/backup/retention/service.go
+++ b/server/internal/backup/retention/service.go
@@ -2,10 +2,13 @@ package retention

 import (
 	"context"
+	"encoding/json"
 	"fmt"
+	"sort"
 	"strings"
 	"time"

+	"backupx/server/internal/backup"
 	"backupx/server/internal/model"
 	"backupx/server/internal/repository"
 	"backupx/server/internal/storage"
@@ -39,16 +42,48 @@ type CleanupResult struct {
 	Warnings       []string
 }

-type Service struct {
-	records repository.BackupRecordRepository
-	now     func() time.Time
+type cleanupObject struct {
+	targetID uint
+	path     string
 }

-func NewService(records repository.BackupRecordRepository) *Service {
-	return &Service{records: records, now: func() time.Time { return time.Now().UTC() }}
+type storedUploadResult struct {
+	StorageTargetID uint   `json:"storageTargetId"`
+	Status          string `json:"status"`
+	StoragePath     string `json:"storagePath"`
+}
+
+type Service struct {
+	records       repository.BackupRecordRepository
+	repositoryKey []byte
+	now           func() time.Time
+}
+
+func NewService(records repository.BackupRecordRepository, repositoryKey ...[]byte) *Service {
+	var key []byte
+	if len(repositoryKey) > 0 {
+		key = append([]byte(nil), repositoryKey[0]...)
+	}
+	return &Service{records: records, repositoryKey: key, now: func() time.Time { return time.Now().UTC() }}
 }

 func (s *Service) Cleanup(ctx context.Context, task *model.BackupTask, provider storage.StorageProvider) (*CleanupResult, error) {
+	return s.cleanup(ctx, task, func(uint) (storage.StorageProvider, bool) {
+		return provider, provider != nil
+	})
+}
+
+// CleanupProviders applies one retention decision to every successful copy of
+// a record before deleting its database row. This prevents multi-target tasks
+// from leaving stale objects after the first target removes the shared record.
+func (s *Service) CleanupProviders(ctx context.Context, task *model.BackupTask, providers map[uint]storage.StorageProvider) (*CleanupResult, error) {
+	return s.cleanup(ctx, task, func(targetID uint) (storage.StorageProvider, bool) {
+		provider, ok := providers[targetID]
+		return provider, ok && provider != nil
+	})
+}
+
+func (s *Service) cleanup(ctx context.Context, task *model.BackupTask, resolveProvider func(uint) (storage.StorageProvider, bool)) (*CleanupResult, error) {
 	if task == nil {
 		return nil, fmt.Errorf("backup task is required")
 	}
@@ -56,19 +91,45 @@ func (s *Service) Cleanup(ctx context.Context, task *model.BackupTask, provider
 	if err != nil {
 		return nil, fmt.Errorf("list successful records: %w", err)
 	}
-	candidates := selectRecordsToDelete(records, task.RetentionDays, task.MaxBackups, s.now())
+	var candidates []model.BackupRecord
+	if gfsEnabled(task) {
+		// GFS 策略：按天/周/月/年分层保留代表性备份，取代简单的天数/数量策略。
+		candidates = selectGFSToDelete(records, task.KeepDaily, task.KeepWeekly, task.KeepMonthly, task.KeepYearly)
+	} else {
+		candidates = selectRecordsToDelete(records, task.RetentionDays, task.MaxBackups, s.now())
+	}
+	// 差异链保护：保留仍被存活差异依赖的全量，避免删除基线后差异无法恢复。
+	candidates = protectDifferentialBases(records, candidates)
 	result := &CleanupResult{}
+	repositoryProviders := make(map[uint]storage.StorageProvider)
+	touchedProviders := make(map[uint]storage.StorageProvider)
 	for _, record := range candidates {
-		if strings.TrimSpace(record.StoragePath) != "" {
-			if provider == nil {
-				result.Warnings = append(result.Warnings, fmt.Sprintf("record %d missing storage provider for cleanup", record.ID))
+		objects, objectErr := cleanupObjectsForRecord(record)
+		if objectErr != nil {
+			result.Warnings = append(result.Warnings, fmt.Sprintf("decode storage copies for record %d failed: %v", record.ID, objectErr))
+			continue
+		}
+		allObjectsDeleted := true
+		for _, object := range objects {
+			provider, ok := resolveProvider(object.targetID)
+			if !ok {
+				result.Warnings = append(result.Warnings, fmt.Sprintf("record %d missing storage provider %d for cleanup", record.ID, object.targetID))
+				allObjectsDeleted = false
 				continue
 			}
-			if err := provider.Delete(ctx, record.StoragePath); err != nil {
-				result.Warnings = append(result.Warnings, fmt.Sprintf("delete storage object %s failed: %v", record.StoragePath, err))
+			if err := provider.Delete(ctx, object.path); err != nil {
+				result.Warnings = append(result.Warnings, fmt.Sprintf("delete storage object %s from target %d failed: %v", object.path, object.targetID, err))
+				allObjectsDeleted = false
 				continue
 			}
 			result.DeletedObjects++
+			touchedProviders[object.targetID] = provider
+			if record.BackupKind == model.BackupKindRepository {
+				repositoryProviders[object.targetID] = provider
+			}
+		}
+		if !allObjectsDeleted {
+			continue
 		}
 		if err := s.records.Delete(ctx, record.ID); err != nil {
 			result.Warnings = append(result.Warnings, fmt.Sprintf("delete backup record %d failed: %v", record.ID, err))
@@ -76,13 +137,25 @@ func (s *Service) Cleanup(ctx context.Context, task *model.BackupTask, provider
 		}
 		result.DeletedRecords++
 	}
+	for targetID, provider := range repositoryProviders {
+		pruned, pruneErr := backup.NewRepositoryStore(s.repositoryKey).Prune(ctx, provider)
+		if pruneErr != nil {
+			result.Warnings = append(result.Warnings, fmt.Sprintf("prune CDC repository on target %d failed: %v", targetID, pruneErr))
+		} else {
+			result.DeletedObjects += pruned.DeletedPacks + pruned.DeletedIndexes
+		}
+	}

 	// 清理空目录：收集被删除文件的父目录，尝试移除空目录
-	if dirCleaner, ok := provider.(storage.StorageDirCleaner); ok && result.DeletedObjects > 0 {
+	for targetID, provider := range touchedProviders {
+		dirCleaner, ok := provider.(storage.StorageDirCleaner)
+		if !ok {
+			continue
+		}
 		prefixes := collectDirPrefixes(candidates)
 		for _, prefix := range prefixes {
 			if err := dirCleaner.RemoveEmptyDirs(ctx, prefix); err != nil {
-				result.Warnings = append(result.Warnings, fmt.Sprintf("cleanup empty dirs for %s: %v", prefix, err))
+				result.Warnings = append(result.Warnings, fmt.Sprintf("cleanup empty dirs for %s on target %d: %v", prefix, targetID, err))
 			}
 		}
 	}
@@ -90,7 +163,87 @@ func (s *Service) Cleanup(ctx context.Context, task *model.BackupTask, provider
 	return result, nil
 }

+func cleanupObjectsForRecord(record model.BackupRecord) ([]cleanupObject, error) {
+	defaultPath := strings.TrimSpace(record.StoragePath)
+	if strings.TrimSpace(record.StorageUploadResults) == "" {
+		if defaultPath == "" {
+			return nil, nil
+		}
+		return []cleanupObject{{targetID: record.StorageTargetID, path: defaultPath}}, nil
+	}
+	var results []storedUploadResult
+	if err := json.Unmarshal([]byte(record.StorageUploadResults), &results); err != nil {
+		return nil, err
+	}
+	objects := make([]cleanupObject, 0, len(results))
+	seen := make(map[uint]struct{}, len(results))
+	for _, result := range results {
+		if !strings.EqualFold(strings.TrimSpace(result.Status), model.BackupRecordStatusSuccess) {
+			continue
+		}
+		objectPath := strings.TrimSpace(result.StoragePath)
+		if objectPath == "" {
+			objectPath = defaultPath
+		}
+		if objectPath == "" {
+			continue
+		}
+		if _, exists := seen[result.StorageTargetID]; exists {
+			continue
+		}
+		seen[result.StorageTargetID] = struct{}{}
+		objects = append(objects, cleanupObject{targetID: result.StorageTargetID, path: objectPath})
+	}
+	if len(objects) == 0 && defaultPath != "" {
+		return nil, fmt.Errorf("successful record has no successful storage copy")
+	}
+	return objects, nil
+}
+
+// protectDifferentialBases 从删除候选中剔除「仍被存活差异依赖的全量」，
+// 避免删除基线后其差异备份失去依据、无法恢复。全量仅当其全部差异都已过期/删除时才会被清理。
+func protectDifferentialBases(all []model.BackupRecord, candidates []model.BackupRecord) []model.BackupRecord {
+	deleting := make(map[uint]struct{}, len(candidates))
+	for _, r := range candidates {
+		deleting[r.ID] = struct{}{}
+	}
+	protected := make(map[uint]struct{})
+	for _, r := range all {
+		if r.BackupKind != model.BackupKindDifferential || r.BaseRecordID == 0 {
+			continue
+		}
+		if _, beingDeleted := deleting[r.ID]; beingDeleted {
+			continue // 该差异本身也将被删除，无需保护其基线
+		}
+		protected[r.BaseRecordID] = struct{}{}
+	}
+	if len(protected) == 0 {
+		return candidates
+	}
+	filtered := make([]model.BackupRecord, 0, len(candidates))
+	for _, r := range candidates {
+		if r.BackupKind == model.BackupKindFull {
+			if _, keep := protected[r.ID]; keep {
+				continue
+			}
+		}
+		filtered = append(filtered, r)
+	}
+	return filtered
+}
+
 func selectRecordsToDelete(records []model.BackupRecord, retentionDays int, maxBackups int, now time.Time) []model.BackupRecord {
+	// 保留锁定（法律保留）的记录永不参与清理：先从候选集中剔除，
+	// 锁定备份既不被删除，也不占用 maxBackups 轮转名额。
+	if hasLocked(records) {
+		unlocked := make([]model.BackupRecord, 0, len(records))
+		for _, r := range records {
+			if !r.Locked {
+				unlocked = append(unlocked, r)
+			}
+		}
+		records = unlocked
+	}
 	selected := make(map[uint]model.BackupRecord)
 	if maxBackups > 0 && len(records) > maxBackups {
 		for _, record := range records[maxBackups:] {
@@ -113,3 +266,81 @@ func selectRecordsToDelete(records []model.BackupRecord, retentionDays int, maxB
 	}
 	return result
 }
+
+func hasLocked(records []model.BackupRecord) bool {
+	for i := range records {
+		if records[i].Locked {
+			return true
+		}
+	}
+	return false
+}
+
+// gfsEnabled 判定任务是否启用 GFS 分层保留（任一层级 > 0）。
+func gfsEnabled(task *model.BackupTask) bool {
+	return task.KeepDaily > 0 || task.KeepWeekly > 0 || task.KeepMonthly > 0 || task.KeepYearly > 0
+}
+
+func recordTime(r *model.BackupRecord) time.Time {
+	if r.CompletedAt != nil {
+		return *r.CompletedAt
+	}
+	return r.StartedAt
+}
+
+func isoWeekKey(t time.Time) string {
+	y, w := t.ISOWeek()
+	return fmt.Sprintf("%d-W%02d", y, w)
+}
+
+// selectGFSToDelete 按 GFS（祖父-父-子）策略选出应删除的记录。
+//
+// 规则：对每个层级（天/周/月/年），在按时间降序排列后，保留最近 keep 个不同周期中
+// 每个周期最新的一份备份；各层级保留集合取并集即「保留集」，其余删除。
+// 锁定（法律保留）的记录始终排除在删除候选之外。
+func selectGFSToDelete(records []model.BackupRecord, daily, weekly, monthly, yearly int) []model.BackupRecord {
+	active := make([]model.BackupRecord, 0, len(records))
+	for i := range records {
+		if !records[i].Locked {
+			active = append(active, records[i])
+		}
+	}
+	sort.SliceStable(active, func(i, j int) bool {
+		return recordTime(&active[i]).After(recordTime(&active[j]))
+	})
+
+	keep := make(map[uint]bool, len(active))
+	keepTier := func(count int, key func(time.Time) string) {
+		if count <= 0 {
+			return
+		}
+		periods := 0
+		lastPeriod := ""
+		havePrev := false
+		for i := range active {
+			p := key(recordTime(&active[i]))
+			if havePrev && p == lastPeriod {
+				continue // 同周期已保留代表（最新一份）
+			}
+			if periods >= count {
+				break // 该层级已保留足够多的周期
+			}
+			keep[active[i].ID] = true
+			lastPeriod = p
+			havePrev = true
+			periods++
+		}
+	}
+	keepTier(daily, func(t time.Time) string { return t.Format("2006-01-02") })
+	keepTier(weekly, isoWeekKey)
+	keepTier(monthly, func(t time.Time) string { return t.Format("2006-01") })
+	keepTier(yearly, func(t time.Time) string { return t.Format("2006") })
+
+	del := make([]model.BackupRecord, 0)
+	for i := range active {
+		if !keep[active[i].ID] {
+			del = append(del, active[i])
+		}
+	}
+	return del
+}
--- a/server/internal/backup/retention/service_test.go
+++ b/server/internal/backup/retention/service_test.go
@@ -24,6 +24,9 @@ func (r *fakeRecordRepository) List(context.Context, repository.BackupRecordList
 func (r *fakeRecordRepository) FindByID(context.Context, uint) (*model.BackupRecord, error) {
 	return nil, nil
 }
+func (r *fakeRecordRepository) FindRunningByTaskAndNode(context.Context, uint, uint) (*model.BackupRecord, error) {
+	return nil, nil
+}
 func (r *fakeRecordRepository) Create(context.Context, *model.BackupRecord) error { return nil }
 func (r *fakeRecordRepository) Update(context.Context, *model.BackupRecord) error { return nil }
 func (r *fakeRecordRepository) Delete(_ context.Context, id uint) error {
@@ -42,6 +45,9 @@ func (r *fakeRecordRepository) ListByTask(_ context.Context, _ uint) ([]model.Ba
 func (r *fakeRecordRepository) ListSuccessfulByTask(_ context.Context, _ uint) ([]model.BackupRecord, error) {
 	return r.records, nil
 }
+func (r *fakeRecordRepository) CountDependentDifferentials(context.Context, uint) (int64, error) {
+	return 0, nil
+}
 func (r *fakeRecordRepository) Count(context.Context) (int64, error)                 { return 0, nil }
 func (r *fakeRecordRepository) CountSince(context.Context, time.Time) (int64, error) { return 0, nil }
 func (r *fakeRecordRepository) CountSuccessSince(context.Context, time.Time) (int64, error) {
@@ -90,6 +96,105 @@ func TestSelectRecordsToDelete(t *testing.T) {
 	}
 }

+func gfsRecord(id uint, ts time.Time, locked bool) model.BackupRecord {
+	completed := ts
+	return model.BackupRecord{ID: id, StartedAt: ts, CompletedAt: &completed, Locked: locked}
+}
+
+func gfsDay(y, m, d, h int) time.Time {
+	return time.Date(y, time.Month(m), d, h, 0, 0, 0, time.UTC)
+}
+
+func deletedIDSet(records []model.BackupRecord) map[uint]bool {
+	out := make(map[uint]bool, len(records))
+	for i := range records {
+		out[records[i].ID] = true
+	}
+	return out
+}
+
+func assertDeleted(t *testing.T, del []model.BackupRecord, want ...uint) {
+	t.Helper()
+	got := deletedIDSet(del)
+	if len(got) != len(want) {
+		t.Fatalf("deleted set size = %d %v, want %d %v", len(got), got, len(want), want)
+	}
+	for _, id := range want {
+		if !got[id] {
+			t.Fatalf("expected id %d to be deleted; got %v", id, got)
+		}
+	}
+}
+
+// TestSelectGFSToDelete_DailyTier 验证按天分层：每天仅保留最新一份，且只保留最近 N 天。
+func TestSelectGFSToDelete_DailyTier(t *testing.T) {
+	records := []model.BackupRecord{
+		gfsRecord(5, gfsDay(2026, 3, 7, 12), false), // 今天，最新 → 保留
+		gfsRecord(4, gfsDay(2026, 3, 7, 6), false),  // 今天，较早 → 删除（非当天代表）
+		gfsRecord(3, gfsDay(2026, 3, 6, 12), false), // 昨天 → 保留
+		gfsRecord(2, gfsDay(2026, 3, 5, 12), false), // 前天 → 超出 daily=2 → 删除
+		gfsRecord(1, gfsDay(2026, 3, 4, 12), false), // 更早 → 删除
+	}
+	del := selectGFSToDelete(records, 2, 0, 0, 0)
+	assertDeleted(t, del, 4, 2, 1)
+}
+
+// TestSelectGFSToDelete_TierUnion 验证多层级取并集：月度层级保留日度层级会删除的旧备份。
+func TestSelectGFSToDelete_TierUnion(t *testing.T) {
+	records := []model.BackupRecord{
+		gfsRecord(3, gfsDay(2026, 3, 7, 12), false),  // 3 月（最新）
+		gfsRecord(2, gfsDay(2026, 2, 15, 12), false), // 2 月
+		gfsRecord(1, gfsDay(2026, 1, 15, 12), false), // 1 月
+	}
+	// daily=1 只留 ID3；monthly=2 留最近两个月（3 月=ID3、2 月=ID2）。并集={3,2}，删除 ID1。
+	del := selectGFSToDelete(records, 1, 0, 2, 0)
+	assertDeleted(t, del, 1)
+}
+
+// TestSelectGFSToDelete_SkipsLocked 验证锁定记录即使超出所有层级也永不删除。
+func TestSelectGFSToDelete_SkipsLocked(t *testing.T) {
+	records := []model.BackupRecord{
+		gfsRecord(3, gfsDay(2026, 3, 7, 12), false),
+		gfsRecord(2, gfsDay(2026, 3, 6, 12), false),
+		gfsRecord(1, gfsDay(2020, 1, 1, 12), true), // 远超 daily=1 但已锁定 → 不删
+	}
+	del := selectGFSToDelete(records, 1, 0, 0, 0)
+	assertDeleted(t, del, 2) // 仅 ID2 被删；ID1 锁定豁免，ID3 为当日代表
+}
+
+func TestGFSEnabled(t *testing.T) {
+	if gfsEnabled(&model.BackupTask{}) {
+		t.Fatal("empty GFS config should be disabled")
+	}
+	if !gfsEnabled(&model.BackupTask{KeepWeekly: 4}) {
+		t.Fatal("KeepWeekly>0 should enable GFS")
+	}
+}
+
+// TestSelectRecordsToDelete_SkipsLocked 验证保留锁定（法律保留）的记录永不被选中删除，
+// 即使它既超过保留期、又超过 maxBackups 名额。
+func TestSelectRecordsToDelete_SkipsLocked(t *testing.T) {
+	now := time.Date(2026, 3, 7, 16, 0, 0, 0, time.UTC)
+	completedNew := now.Add(-24 * time.Hour)
+	completedOld := now.Add(-15 * 24 * time.Hour)
+	records := []model.BackupRecord{
+		{ID: 3, CompletedAt: &completedNew},
+		{ID: 2, CompletedAt: &completedNew},
+		{ID: 1, CompletedAt: &completedOld, Locked: true}, // 超期但锁定 → 不应删除
+	}
+	selected := selectRecordsToDelete(records, 7, 2, now)
+	for _, r := range selected {
+		if r.ID == 1 {
+			t.Fatalf("locked record #1 must never be selected for deletion: %#v", selected)
+		}
+	}
+	// 锁定记录不占 maxBackups 名额：未锁定仅 2 条，maxBackups=2 → 无超额删除，
+	// 且无未锁定记录超期 → 选中集为空。
+	if len(selected) != 0 {
+		t.Fatalf("expected no deletions (locked excluded), got %#v", selected)
+	}
+}
+
 func TestCleanupDeletesExpiredRecords(t *testing.T) {
 	now := time.Date(2026, 3, 7, 16, 0, 0, 0, time.UTC)
 	completedNew := now.Add(-24 * time.Hour)
@@ -116,3 +221,66 @@ func TestCleanupDeletesExpiredRecords(t *testing.T) {
 		t.Fatalf("unexpected deleted objects: %#v", provider.deleted)
 	}
 }
+
+func TestCleanupProvidersDeletesEverySuccessfulCopyBeforeRecord(t *testing.T) {
+	now := time.Date(2026, 3, 7, 16, 0, 0, 0, time.UTC)
+	completedNew := now.Add(-time.Hour)
+	completedOld := now.Add(-24 * time.Hour)
+	repo := &fakeRecordRepository{records: []model.BackupRecord{
+		{ID: 2, TaskID: 1, StoragePath: "records/2", Status: model.BackupRecordStatusSuccess, CompletedAt: &completedNew},
+		{
+			ID: 1, TaskID: 1, StoragePath: "records/1", Status: model.BackupRecordStatusSuccess, CompletedAt: &completedOld,
+			StorageUploadResults: `[{"storageTargetId":11,"status":"success","storagePath":"first/1"},{"storageTargetId":12,"status":"success","storagePath":"second/1"},{"storageTargetId":13,"status":"failed"}]`,
+		},
+	}}
+	first := &fakeProvider{}
+	second := &fakeProvider{}
+	service := NewService(repo)
+	service.now = func() time.Time { return now }
+
+	result, err := service.CleanupProviders(context.Background(), &model.BackupTask{ID: 1, MaxBackups: 1}, map[uint]storage.StorageProvider{
+		11: first,
+		12: second,
+	})
+	if err != nil {
+		t.Fatalf("CleanupProviders returned error: %v", err)
+	}
+	if result.DeletedRecords != 1 || result.DeletedObjects != 2 || len(result.Warnings) != 0 {
+		t.Fatalf("unexpected cleanup result: %#v", result)
+	}
+	if len(repo.deleted) != 1 || repo.deleted[0] != 1 {
+		t.Fatalf("unexpected deleted records: %#v", repo.deleted)
+	}
+	if len(first.deleted) != 1 || first.deleted[0] != "first/1" {
+		t.Fatalf("unexpected first-target deletes: %#v", first.deleted)
+	}
+	if len(second.deleted) != 1 || second.deleted[0] != "second/1" {
+		t.Fatalf("unexpected second-target deletes: %#v", second.deleted)
+	}
+}
+
+func TestCleanupProvidersKeepsRecordWhenCopyProviderIsUnavailable(t *testing.T) {
+	now := time.Date(2026, 3, 7, 16, 0, 0, 0, time.UTC)
+	completedNew := now.Add(-time.Hour)
+	completedOld := now.Add(-24 * time.Hour)
+	repo := &fakeRecordRepository{records: []model.BackupRecord{
+		{ID: 2, TaskID: 1, StoragePath: "records/2", Status: model.BackupRecordStatusSuccess, CompletedAt: &completedNew},
+		{
+			ID: 1, TaskID: 1, StoragePath: "records/1", Status: model.BackupRecordStatusSuccess, CompletedAt: &completedOld,
+			StorageUploadResults: `[{"storageTargetId":11,"status":"success","storagePath":"first/1"},{"storageTargetId":12,"status":"success","storagePath":"second/1"}]`,
+		},
+	}}
+	first := &fakeProvider{}
+	service := NewService(repo)
+
+	result, err := service.CleanupProviders(context.Background(), &model.BackupTask{ID: 1, MaxBackups: 1}, map[uint]storage.StorageProvider{11: first})
+	if err != nil {
+		t.Fatalf("CleanupProviders returned error: %v", err)
+	}
+	if result.DeletedRecords != 0 || result.DeletedObjects != 1 || len(result.Warnings) != 1 {
+		t.Fatalf("unexpected safe partial-cleanup result: %#v", result)
+	}
+	if len(repo.deleted) != 0 {
+		t.Fatalf("record must remain until all copies are deleted: %#v", repo.deleted)
+	}
+}
--- a/server/internal/backup/temp_files.go
+++ b/server/internal/backup/temp_files.go
@@ -55,6 +55,17 @@ func BuildStorageKey(backupType string, startedAt time.Time, fileName string) st
 	return filepath.ToSlash(filepath.Join("BackupX", typeName, startedAt.UTC().Format("060102"), fileName))
 }

+// BuildRecordStorageKey gives remote-Agent artifacts a record-owned namespace.
+// The Master validates this namespace before accepting a relayed upload, so one
+// Agent cannot overwrite another record's object on centrally mounted storage.
+func BuildRecordStorageKey(backupType string, startedAt time.Time, recordID uint, fileName string) string {
+	typeName := strings.TrimSpace(strings.ToLower(backupType))
+	if typeName == "" {
+		typeName = "file"
+	}
+	return filepath.ToSlash(filepath.Join("BackupX", typeName, startedAt.UTC().Format("060102"), "records", fmt.Sprintf("%d", recordID), fileName))
+}
+
 func sanitizeTaskName(value string) string {
 	trimmed := strings.TrimSpace(strings.ToLower(value))
 	trimmed = strings.ReplaceAll(trimmed, " ", "-")
--- a/server/internal/backup/types.go
+++ b/server/internal/backup/types.go
@@ -36,6 +36,15 @@ type TaskSpec struct {
 	MaxBackups        int
 	StartedAt         time.Time
 	TempDir           string
+	// Differential 为 true 时执行差异备份：仅打包自 BaseManifest 以来新增/变更的条目，
+	// 并记录被删除的路径。仅文件类型任务支持；BaseManifest 为空时回退为全量。
+	Differential bool
+	BaseManifest Manifest
+	// SelectedPaths 非空时仅恢复这些归档相对路径（及其子项），用于按需（选择性）恢复；仅文件类型生效。
+	SelectedPaths []string
+	// RestoreTargetPath 仅用于恢复：非空时，文件类型恢复将归档解压到该目录，
+	// 而非默认的原始源路径父目录。用于「恢复到指定位置」（迁移/测试/并排恢复）。
+	RestoreTargetPath string
 }

 type RunResult struct {
@@ -44,6 +53,8 @@ type RunResult struct {
 	TempDir      string
 	Size         int64
 	StorageKey   string
+	// Manifest 为全量备份产出的条目清单，供后续差异备份比对；差异备份运行时为 nil。
+	Manifest *Manifest
 }

 type LogEvent struct {
@@ -62,7 +73,7 @@ type ProgressInfo struct {
 	BytesSent  int64   `json:"bytesSent"`
 	TotalBytes int64   `json:"totalBytes"`
 	Percent    float64 `json:"percent"`
-	SpeedBps   float64 `json:"speedBps"`   // bytes/sec
+	SpeedBps   float64 `json:"speedBps"` // bytes/sec
 	TargetName string  `json:"targetName"`
 }

--- a/server/internal/config/config.go
+++ b/server/internal/config/config.go
@@ -17,9 +17,14 @@ type Config struct {
 }

 type ServerConfig struct {
-	Host string `mapstructure:"host"`
-	Port int    `mapstructure:"port"`
-	Mode string `mapstructure:"mode"`
+	Host        string `mapstructure:"host"`
+	Port        int    `mapstructure:"port"`
+	Mode        string `mapstructure:"mode"`
+	ExternalURL string `mapstructure:"external_url"`
+	// WebRoot 指向前端构建产物目录。留空时后端会按部署惯例自动探测
+	// （./web、./web/dist、/opt/backupx/web 等）。探测命中后后端直接托管
+	// 前端 SPA，无需额外的 nginx 反向代理即可访问 Web 控制台。
+	WebRoot string `mapstructure:"web_root"`
 }

 type DatabaseConfig struct {
@@ -136,6 +141,8 @@ func applyDefaults(v *viper.Viper) {
 	v.SetDefault("server.host", "0.0.0.0")
 	v.SetDefault("server.port", 8340)
 	v.SetDefault("server.mode", "release")
+	v.SetDefault("server.external_url", "")
+	v.SetDefault("server.web_root", "")
 	v.SetDefault("database.path", "./data/backupx.db")
 	v.SetDefault("security.jwt_expire", "24h")
 	v.SetDefault("backup.temp_dir", "/tmp/backupx")
--- a/server/internal/config/config_test.go
+++ b/server/internal/config/config_test.go
@@ -1,6 +1,10 @@
 package config

-import "testing"
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)

 func TestLoadUsesDefaultsWithoutConfigFile(t *testing.T) {
 	cfg, err := Load("")
@@ -18,3 +22,33 @@ func TestLoadUsesDefaultsWithoutConfigFile(t *testing.T) {
 		t.Fatalf("expected default database path, got %s", cfg.Database.Path)
 	}
 }
+
+func TestLoadReadsServerExternalURLFromFile(t *testing.T) {
+	configPath := filepath.Join(t.TempDir(), "config.yaml")
+	content := []byte("server:\n  external_url: \"https://backup.example.com\"\n")
+	if err := os.WriteFile(configPath, content, 0o600); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+
+	cfg, err := Load(configPath)
+	if err != nil {
+		t.Fatalf("Load returned error: %v", err)
+	}
+
+	if cfg.Server.ExternalURL != "https://backup.example.com" {
+		t.Fatalf("expected external URL from config, got %q", cfg.Server.ExternalURL)
+	}
+}
+
+func TestLoadReadsServerExternalURLFromEnv(t *testing.T) {
+	t.Setenv("BACKUPX_SERVER_EXTERNAL_URL", "https://env-backup.example.com")
+
+	cfg, err := Load("")
+	if err != nil {
+		t.Fatalf("Load returned error: %v", err)
+	}
+
+	if cfg.Server.ExternalURL != "https://env-backup.example.com" {
+		t.Fatalf("expected external URL from env, got %q", cfg.Server.ExternalURL)
+	}
+}
--- a/server/internal/http/agent_handler.go
+++ b/server/internal/http/agent_handler.go
@@ -156,6 +156,44 @@ func (h *AgentHandler) UpdateRecord(c *gin.Context) {
 	response.Success(c, gin.H{"status": "ok"})
 }

+// UploadArtifact streams a remote source artifact into storage mounted only on
+// the Master. The request body is never buffered as a whole in memory or disk.
+func (h *AgentHandler) UploadArtifact(c *gin.Context) {
+	node, err := h.agentService.AuthenticatedNode(c.Request.Context(), extractToken(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	recordID, err := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	targetID, err := strconv.ParseUint(c.Param("targetId"), 10, 32)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	if c.Request.ContentLength < 0 {
+		c.JSON(stdhttp.StatusLengthRequired, gin.H{"code": "CONTENT_LENGTH_REQUIRED", "message": "artifact content length is required"})
+		return
+	}
+	if err := h.agentService.UploadArtifact(
+		c.Request.Context(),
+		node,
+		uint(recordID),
+		uint(targetID),
+		c.GetHeader("X-BackupX-Object-Key"),
+		c.Request.ContentLength,
+		c.GetHeader("X-BackupX-SHA256"),
+		c.Request.Body,
+	); err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, gin.H{"status": "ok"})
+}
+
 // GetRestoreSpec Agent 拉取恢复规格。
 func (h *AgentHandler) GetRestoreSpec(c *gin.Context) {
 	if h.restoreService == nil {
@@ -208,6 +246,34 @@ func (h *AgentHandler) UpdateRestore(c *gin.Context) {
 	response.Success(c, gin.H{"status": "ok"})
 }

+// DownloadRestoreArtifact streams a Master-local backup back to its source
+// Agent for restore without exposing the local storage configuration.
+func (h *AgentHandler) DownloadRestoreArtifact(c *gin.Context) {
+	if h.restoreService == nil {
+		c.JSON(stdhttp.StatusServiceUnavailable, gin.H{"code": "RESTORE_SERVICE_DISABLED", "message": "restore service is not enabled"})
+		return
+	}
+	node, err := h.agentService.AuthenticatedNode(c.Request.Context(), extractToken(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	restoreID, err := strconv.ParseUint(c.Param("id"), 10, 32)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	artifact, err := h.restoreService.DownloadAgentArtifact(c.Request.Context(), node, uint(restoreID))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	c.DataFromReader(stdhttp.StatusOK, artifact.Size, "application/octet-stream", artifact.Reader, nil)
+	if err := artifact.Reader.Close(); err != nil {
+		_ = c.Error(err)
+	}
+}
+
 // Self 返回当前 Agent token 所属节点的状态，供安装脚本末尾探活。
 func (h *AgentHandler) Self(c *gin.Context) {
 	node, err := h.agentService.AuthenticatedNode(c.Request.Context(), extractToken(c))
--- a/server/internal/http/auth_handler.go
+++ b/server/internal/http/auth_handler.go
@@ -1,12 +1,23 @@
 package http

 import (
+	"net"
+	stdhttp "net/http"
+	"strings"
+	"time"
+
 	"backupx/server/internal/apperror"
 	"backupx/server/internal/service"
 	"backupx/server/pkg/response"
 	"github.com/gin-gonic/gin"
 )

+const (
+	trustedDeviceCookieName   = "backupx_trusted_device"
+	trustedDeviceCookiePath   = "/api/auth"
+	trustedDeviceCookieMaxAge = int((30 * 24 * time.Hour) / time.Second)
+)
+
 type AuthHandler struct {
 	authService *service.AuthService
 }
@@ -44,11 +55,18 @@ func (h *AuthHandler) Login(c *gin.Context) {
 		response.Error(c, apperror.BadRequest("AUTH_LOGIN_INVALID", "登录参数不合法", err))
 		return
 	}
+	if strings.TrimSpace(input.TrustedDeviceToken) == "" {
+		input.TrustedDeviceToken = trustedDeviceCookieValue(c)
+	}
 	payload, err := h.authService.Login(c.Request.Context(), input, ClientKey(c))
 	if err != nil {
 		response.Error(c, err)
 		return
 	}
+	if payload.TrustedDeviceToken != "" {
+		setTrustedDeviceCookie(c, payload.TrustedDeviceToken)
+		payload.TrustedDeviceToken = ""
+	}
 	response.Success(c, payload)
 }

@@ -83,9 +101,315 @@ func (h *AuthHandler) ChangePassword(c *gin.Context) {
 		response.Error(c, err)
 		return
 	}
+	clearTrustedDeviceCookie(c)
 	response.Success(c, gin.H{"changed": true})
 }

+func (h *AuthHandler) PrepareTwoFactor(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.TwoFactorSetupInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_2FA_INVALID", "参数不合法", err))
+		return
+	}
+	payload, err := h.authService.PrepareTwoFactor(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, payload)
+}
+
+func (h *AuthHandler) EnableTwoFactor(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.EnableTwoFactorInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_2FA_INVALID", "参数不合法", err))
+		return
+	}
+	user, err := h.authService.EnableTwoFactor(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, user)
+}
+
+func (h *AuthHandler) DisableTwoFactor(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.DisableTwoFactorInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_2FA_INVALID", "参数不合法", err))
+		return
+	}
+	user, err := h.authService.DisableTwoFactor(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	if !user.MFAEnabled {
+		clearTrustedDeviceCookie(c)
+	}
+	response.Success(c, user)
+}
+
+func (h *AuthHandler) RegenerateRecoveryCodes(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.RegenerateRecoveryCodesInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_2FA_INVALID", "参数不合法", err))
+		return
+	}
+	payload, err := h.authService.RegenerateRecoveryCodes(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, payload)
+}
+
+func (h *AuthHandler) ConfigureOTP(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.OTPConfigInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_OTP_INVALID", "参数不合法", err))
+		return
+	}
+	user, err := h.authService.ConfigureOutOfBandOTP(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	if !user.MFAEnabled {
+		clearTrustedDeviceCookie(c)
+	}
+	response.Success(c, user)
+}
+
+func (h *AuthHandler) SendLoginOTP(c *gin.Context) {
+	var input service.LoginOTPInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_OTP_INVALID", "参数不合法", err))
+		return
+	}
+	if err := h.authService.SendLoginOTP(c.Request.Context(), input, ClientKey(c)); err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, gin.H{"sent": true})
+}
+
+func (h *AuthHandler) BeginWebAuthnRegistration(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.WebAuthnRegistrationOptionsInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_WEBAUTHN_INVALID", "参数不合法", err))
+		return
+	}
+	options, err := h.authService.BeginWebAuthnRegistration(c.Request.Context(), subject, input, webAuthnRequestContext(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, options)
+}
+
+func (h *AuthHandler) FinishWebAuthnRegistration(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.WebAuthnRegistrationFinishInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_WEBAUTHN_INVALID", "参数不合法", err))
+		return
+	}
+	user, err := h.authService.FinishWebAuthnRegistration(c.Request.Context(), subject, input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, user)
+}
+
+func (h *AuthHandler) BeginWebAuthnLogin(c *gin.Context) {
+	var input service.WebAuthnLoginOptionsInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_WEBAUTHN_INVALID", "参数不合法", err))
+		return
+	}
+	options, err := h.authService.BeginWebAuthnLogin(c.Request.Context(), input, webAuthnRequestContext(c), ClientKey(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, options)
+}
+
+func (h *AuthHandler) ListWebAuthnCredentials(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	items, err := h.authService.ListWebAuthnCredentials(c.Request.Context(), subject)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, items)
+}
+
+func (h *AuthHandler) DeleteWebAuthnCredential(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.WebAuthnCredentialDeleteInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_WEBAUTHN_INVALID", "参数不合法", err))
+		return
+	}
+	user, err := h.authService.DeleteWebAuthnCredential(c.Request.Context(), subject, c.Param("id"), input)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	if !user.MFAEnabled {
+		clearTrustedDeviceCookie(c)
+	}
+	response.Success(c, user)
+}
+
+func (h *AuthHandler) ListTrustedDevices(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	items, err := h.authService.ListTrustedDevices(c.Request.Context(), subject)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, items)
+}
+
+func (h *AuthHandler) RevokeTrustedDevice(c *gin.Context) {
+	subjectValue, _ := c.Get(contextUserSubjectKey)
+	subject, err := service.SubjectFromContextValue(subjectValue)
+	if err != nil {
+		response.Error(c, apperror.Unauthorized("AUTH_INVALID_SUBJECT", "无效登录态", err))
+		return
+	}
+	var input service.TrustedDeviceRevokeInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("AUTH_TRUSTED_DEVICE_INVALID", "参数不合法", err))
+		return
+	}
+	if err := h.authService.RevokeTrustedDevice(c.Request.Context(), subject, c.Param("id"), input); err != nil {
+		response.Error(c, err)
+		return
+	}
+	clearTrustedDeviceCookie(c)
+	response.Success(c, gin.H{"deleted": true})
+}
+
 func (h *AuthHandler) Logout(c *gin.Context) {
 	response.Success(c, gin.H{"loggedOut": true})
 }
+
+func webAuthnRequestContext(c *gin.Context) service.WebAuthnRequestContext {
+	host := firstForwardedValue(c.Request.Host)
+	if forwardedHost := firstForwardedValue(c.GetHeader("X-Forwarded-Host")); forwardedHost != "" {
+		host = forwardedHost
+	}
+	rpID := host
+	if parsedHost, _, err := net.SplitHostPort(host); err == nil {
+		rpID = parsedHost
+	}
+	scheme := "http"
+	if c.Request.TLS != nil {
+		scheme = "https"
+	}
+	if forwardedProto := firstForwardedValue(c.GetHeader("X-Forwarded-Proto")); forwardedProto != "" {
+		scheme = forwardedProto
+	}
+	origin := strings.TrimSpace(c.GetHeader("Origin"))
+	if origin == "" {
+		origin = scheme + "://" + host
+	}
+	return service.WebAuthnRequestContext{RPID: rpID, Origin: origin}
+}
+
+func firstForwardedValue(value string) string {
+	parts := strings.Split(value, ",")
+	if len(parts) == 0 {
+		return ""
+	}
+	return strings.TrimSpace(parts[0])
+}
+
+func trustedDeviceCookieValue(c *gin.Context) string {
+	token, err := c.Cookie(trustedDeviceCookieName)
+	if err != nil {
+		return ""
+	}
+	return strings.TrimSpace(token)
+}
+
+func setTrustedDeviceCookie(c *gin.Context, token string) {
+	writeTrustedDeviceCookie(c, strings.TrimSpace(token), trustedDeviceCookieMaxAge)
+}
+
+func clearTrustedDeviceCookie(c *gin.Context) {
+	writeTrustedDeviceCookie(c, "", -1)
+}
+
+func writeTrustedDeviceCookie(c *gin.Context, value string, maxAge int) {
+	c.SetSameSite(stdhttp.SameSiteLaxMode)
+	c.SetCookie(trustedDeviceCookieName, value, maxAge, trustedDeviceCookiePath, "", requestIsSecure(c), true)
+}
+
+func requestIsSecure(c *gin.Context) bool {
+	if c.Request.TLS != nil {
+		return true
+	}
+	return strings.EqualFold(firstForwardedValue(c.GetHeader("X-Forwarded-Proto")), "https")
+}
--- a/server/internal/http/backup_record_handler.go
+++ b/server/internal/http/backup_record_handler.go
@@ -52,6 +52,20 @@ func (h *BackupRecordHandler) Get(c *gin.Context) {
 	response.Success(c, item)
 }

+// Contents 返回备份记录的文件清单（内容浏览，只读）。
+func (h *BackupRecordHandler) Contents(c *gin.Context) {
+	id, ok := parseUintParam(c, "id")
+	if !ok {
+		return
+	}
+	contents, err := h.service.ListContents(c.Request.Context(), id)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, contents)
+}
+
 func (h *BackupRecordHandler) StreamLogs(c *gin.Context) {
 	id, ok := parseUintParam(c, "id")
 	if !ok {
@@ -137,7 +151,14 @@ func (h *BackupRecordHandler) Restore(c *gin.Context) {
 	if subject, exists := c.Get(contextUserSubjectKey); exists {
 		triggeredBy = strings.TrimSpace(fmt.Sprintf("%v", subject))
 	}
-	detail, err := h.restoreService.Start(c.Request.Context(), id, triggeredBy)
+	// 可选请求体：selectedPaths 按需（选择性）恢复；targetPath 恢复到指定目录（仅文件类型本机恢复）。
+	// 无 body 时为整体恢复到原始路径。
+	var body struct {
+		SelectedPaths []string `json:"selectedPaths"`
+		TargetPath    string   `json:"targetPath"`
+	}
+	_ = c.ShouldBindJSON(&body)
+	detail, err := h.restoreService.StartSelective(c.Request.Context(), id, body.SelectedPaths, strings.TrimSpace(body.TargetPath), triggeredBy)
 	if err != nil {
 		response.Error(c, err)
 		return
@@ -161,6 +182,32 @@ func (h *BackupRecordHandler) Delete(c *gin.Context) {
 	response.Success(c, gin.H{"deleted": true})
 }

+// SetLock 设置/解除备份记录的保留锁定（法律保留）。
+func (h *BackupRecordHandler) SetLock(c *gin.Context) {
+	id, ok := parseUintParam(c, "id")
+	if !ok {
+		return
+	}
+	var input struct {
+		Locked bool `json:"locked"`
+	}
+	if err := c.ShouldBindJSON(&input); err != nil {
+		response.Error(c, apperror.BadRequest("BACKUP_RECORD_LOCK_INVALID", "锁定参数不合法", err))
+		return
+	}
+	detail, err := h.service.SetLock(c.Request.Context(), id, input.Locked)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	action, desc := "unlock", fmt.Sprintf("解除备份记录保留锁定 (ID: %d)", id)
+	if input.Locked {
+		action, desc = "lock", fmt.Sprintf("设置备份记录保留锁定 (ID: %d)", id)
+	}
+	recordAudit(c, h.auditService, "backup_record", action, "backup_record", fmt.Sprintf("%d", id), "", desc)
+	response.Success(c, detail)
+}
+
 func (h *BackupRecordHandler) BatchDelete(c *gin.Context) {
 	var input struct {
 		IDs []uint `json:"ids" binding:"required,min=1"`
@@ -216,7 +263,7 @@ func writeSSEEvent(writer io.Writer, event backup.LogEvent) error {
 }

 func parseUintString(value string) (uint, bool) {
-	parsed, err := strconv.ParseUint(strings.TrimSpace(value), 10, 64)
+	parsed, err := strconv.ParseUint(strings.TrimSpace(value), 10, 0)
 	if err != nil {
 		return 0, false
 	}
--- a/server/internal/http/install_flow_test.go
+++ b/server/internal/http/install_flow_test.go
@@ -3,10 +3,12 @@ package http
 import (
 	"bytes"
 	"context"
+	"encoding/base64"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"testing"
 	"time"
@@ -17,15 +19,20 @@ import (
 	"backupx/server/internal/repository"
 	"backupx/server/internal/security"
 	"backupx/server/internal/service"
+	"backupx/server/internal/storage/codec"
 )

 // setupInstallFlowRouter 构造一个 Node + Agent + InstallToken 全量依赖的 router，
 // 并返回已登录管理员 JWT。
 func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
+	return setupInstallFlowRouterWithExternalURL(t, "")
+}
+
+func setupInstallFlowRouterWithExternalURL(t *testing.T, externalURL string) (http.Handler, string) {
 	t.Helper()
 	tempDir := t.TempDir()
 	cfg := config.Config{
-		Server:   config.ServerConfig{Host: "127.0.0.1", Port: 8340, Mode: "test"},
+		Server:   config.ServerConfig{Host: "127.0.0.1", Port: 8340, Mode: "test", ExternalURL: externalURL},
 		Database: config.DatabaseConfig{Path: filepath.Join(tempDir, "backupx.db")},
 		Security: config.SecurityConfig{JWTExpire: "24h"},
 		Log:      config.LogConfig{Level: "error"},
@@ -38,6 +45,13 @@ func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
 	if err != nil {
 		t.Fatalf("db: %v", err)
 	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatalf("sql db: %v", err)
+	}
+	t.Cleanup(func() {
+		_ = sqlDB.Close()
+	})

 	userRepo := repository.NewUserRepository(db)
 	systemConfigRepo := repository.NewSystemConfigRepository(db)
@@ -46,7 +60,7 @@ func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
 		t.Fatalf("security: %v", err)
 	}
 	jwtMgr := security.NewJWTManager(resolved.JWTSecret, time.Hour)
-	authSvc := service.NewAuthService(userRepo, systemConfigRepo, jwtMgr, security.NewLoginRateLimiter(5, time.Minute))
+	authSvc := service.NewAuthService(userRepo, systemConfigRepo, jwtMgr, security.NewLoginRateLimiter(5, time.Minute), codec.NewConfigCipher(resolved.EncryptionKey))
 	systemSvc := service.NewSystemService(cfg, "test", time.Now().UTC())

 	nodeRepo := repository.NewNodeRepository(db)
@@ -58,9 +72,6 @@ func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
 	installTokenRepo := repository.NewAgentInstallTokenRepository(db)
 	installTokenSvc := service.NewInstallTokenService(installTokenRepo, nodeRepo)

-	auditLogRepo := repository.NewAuditLogRepository(db)
-	auditSvc := service.NewAuditService(auditLogRepo)
-
 	// 用 cancelable ctx，测试结束时停掉 handler 启动的后台 GC 协程，
 	// 避免 goroutine 持有 map 导致 tempdir 清理失败。
 	ctx, cancel := context.WithCancel(context.Background())
@@ -75,7 +86,7 @@ func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
 		SystemService:       systemSvc,
 		NodeService:         nodeSvc,
 		InstallTokenService: installTokenSvc,
-		AuditService:        auditSvc,
+		MasterExternalURL:   cfg.Server.ExternalURL,
 		JWTManager:          jwtMgr,
 		UserRepository:      userRepo,
 		SystemConfigRepo:    systemConfigRepo,
@@ -104,6 +115,73 @@ func setupInstallFlowRouter(t *testing.T) (http.Handler, string) {
 	return router, setupResp.Data.Token
 }

+func TestInstallTokenUsesConfiguredExternalURL(t *testing.T) {
+	const externalURL = "https://public.example.com/base"
+	router, jwt := setupInstallFlowRouterWithExternalURL(t, externalURL)
+
+	batchBody, _ := json.Marshal(map[string][]string{"names": {"external-url-node"}})
+	batchReq := httptest.NewRequest(http.MethodPost, "/api/nodes/batch", bytes.NewBuffer(batchBody))
+	batchReq.Header.Set("Content-Type", "application/json")
+	batchReq.Header.Set("Authorization", "Bearer "+jwt)
+	batchRec := httptest.NewRecorder()
+	router.ServeHTTP(batchRec, batchReq)
+	if batchRec.Code != 200 {
+		t.Fatalf("batch create failed: %d %s", batchRec.Code, batchRec.Body.String())
+	}
+	var batchResp struct {
+		Data []struct {
+			ID uint `json:"id"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(batchRec.Body.Bytes(), &batchResp); err != nil {
+		t.Fatalf("unmarshal batch: %v", err)
+	}
+	if len(batchResp.Data) != 1 {
+		t.Fatalf("expected 1 node, got %d", len(batchResp.Data))
+	}
+
+	genBody, _ := json.Marshal(map[string]any{
+		"mode":         "systemd",
+		"arch":         "auto",
+		"agentVersion": "v1.7.0",
+		"downloadSrc":  "github",
+		"ttlSeconds":   900,
+	})
+	genReq := httptest.NewRequest(http.MethodPost,
+		"/api/nodes/"+formatUint(batchResp.Data[0].ID)+"/install-tokens", bytes.NewBuffer(genBody))
+	genReq.Header.Set("Content-Type", "application/json")
+	genReq.Header.Set("Authorization", "Bearer "+jwt)
+	genRec := httptest.NewRecorder()
+	router.ServeHTTP(genRec, genReq)
+	if genRec.Code != 200 {
+		t.Fatalf("install-tokens failed: %d %s", genRec.Code, genRec.Body.String())
+	}
+	var genResp struct {
+		Data struct {
+			InstallToken string `json:"installToken"`
+			URL          string `json:"url"`
+			FallbackURL  string `json:"fallbackUrl"`
+			ScriptBase64 string `json:"scriptBase64"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(genRec.Body.Bytes(), &genResp); err != nil {
+		t.Fatalf("unmarshal gen: %v", err)
+	}
+	if genResp.Data.URL != externalURL+"/api/install/"+genResp.Data.InstallToken {
+		t.Fatalf("url should use external URL, got %q", genResp.Data.URL)
+	}
+	if genResp.Data.FallbackURL != externalURL+"/install/"+genResp.Data.InstallToken {
+		t.Fatalf("fallbackUrl should use external URL, got %q", genResp.Data.FallbackURL)
+	}
+	decodedScript, err := base64.StdEncoding.DecodeString(genResp.Data.ScriptBase64)
+	if err != nil {
+		t.Fatalf("scriptBase64 should be valid base64: %v", err)
+	}
+	if !strings.Contains(string(decodedScript), `MASTER_URL="`+externalURL+`"`) {
+		t.Fatalf("script should use external MASTER_URL:\n%s", string(decodedScript))
+	}
+}
+
 func TestOneClickInstallFlow(t *testing.T) {
 	router, jwt := setupInstallFlowRouter(t)

@@ -152,6 +230,8 @@ func TestOneClickInstallFlow(t *testing.T) {
 		Data struct {
 			InstallToken string `json:"installToken"`
 			URL          string `json:"url"`
+			FallbackURL  string `json:"fallbackUrl"`
+			ScriptBase64 string `json:"scriptBase64"`
 		} `json:"data"`
 	}
 	if err := json.Unmarshal(genRec.Body.Bytes(), &genResp); err != nil {
@@ -160,6 +240,16 @@ func TestOneClickInstallFlow(t *testing.T) {
 	if genResp.Data.InstallToken == "" {
 		t.Fatalf("missing installToken")
 	}
+	if !strings.Contains(genResp.Data.FallbackURL, "/install/") {
+		t.Fatalf("missing fallback install URL, got %q", genResp.Data.FallbackURL)
+	}
+	decodedScript, err := base64.StdEncoding.DecodeString(genResp.Data.ScriptBase64)
+	if err != nil {
+		t.Fatalf("scriptBase64 should be valid base64: %v", err)
+	}
+	if !strings.Contains(string(decodedScript), "BACKUPX_AGENT_INSTALL_V1") {
+		t.Fatalf("scriptBase64 should contain rendered install script")
+	}

 	// 3. 公开端点消费
 	scriptReq := httptest.NewRequest(http.MethodGet, "/install/"+genResp.Data.InstallToken, nil)
@@ -171,6 +261,22 @@ func TestOneClickInstallFlow(t *testing.T) {
 	if !strings.Contains(scriptRec.Body.String(), "systemctl enable --now backupx-agent") {
 		t.Fatalf("script missing systemctl enable:\n%s", scriptRec.Body.String())
 	}
+	// Issue #46 防嗅探 headers：text/plain + nosniff + no-store + Content-Disposition
+	if ct := scriptRec.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/plain") {
+		t.Errorf("script Content-Type should be text/plain*, got %q", ct)
+	}
+	if nosniff := scriptRec.Header().Get("X-Content-Type-Options"); nosniff != "nosniff" {
+		t.Errorf("missing X-Content-Type-Options: nosniff (got %q)", nosniff)
+	}
+	if cc := scriptRec.Header().Get("Cache-Control"); !strings.Contains(cc, "no-store") {
+		t.Errorf("missing Cache-Control: no-store (got %q)", cc)
+	}
+	if cd := scriptRec.Header().Get("Content-Disposition"); !strings.Contains(cd, "backupx-agent-install.sh") {
+		t.Errorf("Content-Disposition should name the script file (got %q)", cd)
+	}
+	if !strings.Contains(scriptRec.Body.String(), "BACKUPX_AGENT_INSTALL_V1") {
+		t.Errorf("script missing magic marker BACKUPX_AGENT_INSTALL_V1")
+	}

 	// 4. 再次消费应 410
 	scriptReq2 := httptest.NewRequest(http.MethodGet, "/install/"+genResp.Data.InstallToken, nil)
@@ -181,6 +287,81 @@ func TestOneClickInstallFlow(t *testing.T) {
 	}
 }

+// TestInstallScriptAliasUnderAPI 验证 /api/install/:token 别名路径可用，
+// 这是 Issue #46 的根本修复：让 install 端点自动命中反向代理的 /api/ 转发规则，
+// 避免 nginx SPA fallback 把请求当前端路由返回 index.html。
+func TestInstallScriptAliasUnderAPI(t *testing.T) {
+	router, token := setupInstallFlowRouter(t)
+
+	// 1. 创建一个节点，生成 install token
+	batchBody, _ := json.Marshal(map[string][]string{"names": {"alias-node"}})
+	batchReq := httptest.NewRequest(http.MethodPost, "/api/nodes/batch", bytes.NewReader(batchBody))
+	batchReq.Header.Set("Content-Type", "application/json")
+	batchReq.Header.Set("Authorization", "Bearer "+token)
+	batchRec := httptest.NewRecorder()
+	router.ServeHTTP(batchRec, batchReq)
+	if batchRec.Code != 200 {
+		t.Fatalf("batch create failed: %d %s", batchRec.Code, batchRec.Body.String())
+	}
+	var batchResp struct {
+		Data []struct {
+			ID uint `json:"id"`
+		} `json:"data"`
+	}
+	_ = json.Unmarshal(batchRec.Body.Bytes(), &batchResp)
+	if len(batchResp.Data) == 0 {
+		t.Fatalf("batch create returned no nodes: %s", batchRec.Body.String())
+	}
+	nodeID := batchResp.Data[0].ID
+
+	genBody, _ := json.Marshal(map[string]any{
+		"mode": "systemd", "arch": "auto", "agentVersion": "v1.7.0", "downloadSrc": "github", "ttlSeconds": 600,
+	})
+	genReq := httptest.NewRequest(http.MethodPost,
+		"/api/nodes/"+strconv.FormatUint(uint64(nodeID), 10)+"/install-tokens", bytes.NewReader(genBody))
+	genReq.Header.Set("Content-Type", "application/json")
+	genReq.Header.Set("Authorization", "Bearer "+token)
+	genRec := httptest.NewRecorder()
+	router.ServeHTTP(genRec, genReq)
+	if genRec.Code != 200 {
+		t.Fatalf("gen install token failed: %d %s", genRec.Code, genRec.Body.String())
+	}
+	var genResp struct {
+		Data struct {
+			InstallToken string `json:"installToken"`
+			URL          string `json:"url"`
+			FallbackURL  string `json:"fallbackUrl"`
+			ScriptBase64 string `json:"scriptBase64"`
+		} `json:"data"`
+	}
+	_ = json.Unmarshal(genRec.Body.Bytes(), &genResp)
+
+	// 2. 新生成的 url 应指向 /api/install/... —— 让反向代理的 /api/ 转发规则自动接管
+	if !strings.Contains(genResp.Data.URL, "/api/install/") {
+		t.Errorf("new install URL should use /api/install/ prefix, got %s", genResp.Data.URL)
+	}
+	if !strings.Contains(genResp.Data.FallbackURL, "/install/") {
+		t.Errorf("fallback install URL should use /install/ prefix, got %s", genResp.Data.FallbackURL)
+	}
+	if genResp.Data.ScriptBase64 == "" {
+		t.Errorf("new install response should include scriptBase64 for proxy-independent commands")
+	}
+
+	// 3. /api/install/:token 必须可消费（与 /install/:token 等价）
+	aliasReq := httptest.NewRequest(http.MethodGet, "/api/install/"+genResp.Data.InstallToken, nil)
+	aliasRec := httptest.NewRecorder()
+	router.ServeHTTP(aliasRec, aliasReq)
+	if aliasRec.Code != 200 {
+		t.Fatalf("/api/install alias failed: %d %s", aliasRec.Code, aliasRec.Body.String())
+	}
+	if !strings.Contains(aliasRec.Body.String(), "systemctl enable --now backupx-agent") {
+		t.Errorf("alias should return rendered script, got:\n%s", aliasRec.Body.String())
+	}
+	if ct := aliasRec.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/plain") {
+		t.Errorf("alias Content-Type should be text/plain*, got %q", ct)
+	}
+}
+
 func TestInstallTokenRateLimit(t *testing.T) {
 	router, jwt := setupInstallFlowRouter(t)

@@ -315,6 +496,76 @@ func TestInstallFlowComposeModeMismatch(t *testing.T) {
 	}
 }

+func TestInstallFlowComposeSuccessConsumesToken(t *testing.T) {
+	router, jwt := setupInstallFlowRouter(t)
+
+	batchBody, _ := json.Marshal(map[string][]string{"names": {"compose-ok"}})
+	batchReq := httptest.NewRequest(http.MethodPost, "/api/nodes/batch", bytes.NewBuffer(batchBody))
+	batchReq.Header.Set("Content-Type", "application/json")
+	batchReq.Header.Set("Authorization", "Bearer "+jwt)
+	batchRec := httptest.NewRecorder()
+	router.ServeHTTP(batchRec, batchReq)
+	if batchRec.Code != 200 {
+		t.Fatalf("batch create failed: %d %s", batchRec.Code, batchRec.Body.String())
+	}
+	var batchResp struct {
+		Data []struct {
+			ID uint `json:"id"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(batchRec.Body.Bytes(), &batchResp); err != nil {
+		t.Fatalf("unmarshal batch: %v", err)
+	}
+	if len(batchResp.Data) != 1 {
+		t.Fatalf("expected 1 node, got %d", len(batchResp.Data))
+	}
+
+	genBody, _ := json.Marshal(map[string]any{
+		"mode":         "docker",
+		"arch":         "auto",
+		"agentVersion": "v1.7.0",
+		"downloadSrc":  "github",
+		"ttlSeconds":   900,
+	})
+	genReq := httptest.NewRequest(http.MethodPost,
+		"/api/nodes/"+formatUint(batchResp.Data[0].ID)+"/install-tokens", bytes.NewBuffer(genBody))
+	genReq.Header.Set("Content-Type", "application/json")
+	genReq.Header.Set("Authorization", "Bearer "+jwt)
+	genRec := httptest.NewRecorder()
+	router.ServeHTTP(genRec, genReq)
+	if genRec.Code != 200 {
+		t.Fatalf("install-tokens failed: %d %s", genRec.Code, genRec.Body.String())
+	}
+	var genResp struct {
+		Data struct {
+			InstallToken string `json:"installToken"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(genRec.Body.Bytes(), &genResp); err != nil {
+		t.Fatalf("unmarshal gen: %v", err)
+	}
+	if genResp.Data.InstallToken == "" {
+		t.Fatalf("missing installToken")
+	}
+
+	composeReq := httptest.NewRequest(http.MethodGet, "/api/install/"+genResp.Data.InstallToken+"/compose.yml", nil)
+	composeRec := httptest.NewRecorder()
+	router.ServeHTTP(composeRec, composeReq)
+	if composeRec.Code != 200 {
+		t.Fatalf("compose fetch failed: %d %s", composeRec.Code, composeRec.Body.String())
+	}
+	if !strings.Contains(composeRec.Body.String(), "BACKUPX_AGENT_TOKEN") {
+		t.Fatalf("compose missing token env:\n%s", composeRec.Body.String())
+	}
+
+	scriptReq := httptest.NewRequest(http.MethodGet, "/api/install/"+genResp.Data.InstallToken, nil)
+	scriptRec := httptest.NewRecorder()
+	router.ServeHTTP(scriptRec, scriptReq)
+	if scriptRec.Code != http.StatusGone {
+		t.Fatalf("script after compose should be 410, got %d: %s", scriptRec.Code, scriptRec.Body.String())
+	}
+}
+
 // formatUint 小工具：uint → 十进制字符串（无需引入 strconv）。
 func formatUint(u uint) string {
 	if u == 0 {
--- a/server/internal/http/install_handler.go
+++ b/server/internal/http/install_handler.go
@@ -36,6 +36,13 @@ func NewInstallHandler(gcCtx context.Context, tokenService *service.InstallToken
 }

 // Script 消费 install token 并返回 shell 脚本；Mode 由 token 存储决定（systemd/docker/foreground 均返回 shell）。
+//
+// 响应头策略（issue #46 教训）：
+//   - Content-Type 用 text/plain 而非 text/x-shellscript：避免 Cloudflare/反向代理把
+//     脚本内容按特殊类型识别并触发 minify/HTML rewrite，导致 `curl | sh` 收到非脚本内容
+//   - X-Content-Type-Options: nosniff：禁止浏览器/中间层按内容嗅探改写 MIME
+//   - Cache-Control: no-store：token 一次性消费，禁止任何缓存层留存旧脚本
+//   - Content-Disposition: inline; filename=...：部分代理会跳过带文件名的响应
 func (h *InstallHandler) Script(c *gin.Context) {
 	if !h.limiter.allow(c.ClientIP()) {
 		c.String(stdhttp.StatusTooManyRequests, "请求过于频繁，请稍后再试\n")
@@ -52,21 +59,15 @@ func (h *InstallHandler) Script(c *gin.Context) {
 		return
 	}
 	h.recordConsumeAudit(c, consumed, "script")
-	script, err := installscript.RenderScript(installscript.Context{
-		MasterURL:     resolveMasterURL(c, h.externalURL),
-		AgentToken:    consumed.Node.Token,
-		AgentVersion:  consumed.Record.AgentVer,
-		Mode:          consumed.Record.Mode,
-		Arch:          consumed.Record.Arch,
-		DownloadBase:  installscript.DownloadBaseFor(consumed.Record.DownloadSrc),
-		InstallPrefix: "/opt/backupx-agent",
-		NodeID:        consumed.Node.ID,
-	})
+	script, err := renderInstallScript(resolveMasterURL(c, h.externalURL), consumed.Node, consumed.Record)
 	if err != nil {
 		c.String(stdhttp.StatusInternalServerError, "render error\n")
 		return
 	}
-	c.Data(stdhttp.StatusOK, "text/x-shellscript; charset=utf-8", []byte(script))
+	c.Header("X-Content-Type-Options", "nosniff")
+	c.Header("Cache-Control", "no-store")
+	c.Header("Content-Disposition", `inline; filename="backupx-agent-install.sh"`)
+	c.Data(stdhttp.StatusOK, "text/plain; charset=utf-8", []byte(script))
 }

 // Compose 消费 install token 并返回 docker-compose YAML，仅 Mode=docker 有效。
@@ -131,6 +132,19 @@ func (h *InstallHandler) recordConsumeAudit(c *gin.Context, consumed *service.Co
 	})
 }

+func renderInstallScript(masterURL string, node *model.Node, record *model.AgentInstallToken) (string, error) {
+	return installscript.RenderScript(installscript.Context{
+		MasterURL:     masterURL,
+		AgentToken:    node.Token,
+		AgentVersion:  record.AgentVer,
+		Mode:          record.Mode,
+		Arch:          record.Arch,
+		DownloadBase:  installscript.DownloadBaseFor(record.DownloadSrc),
+		InstallPrefix: "/opt/backupx-agent",
+		NodeID:        node.ID,
+	})
+}
+
 // resolveMasterURL 按优先级推导 Master URL：外部配置 > X-Forwarded-* > Request.Host。
 // 此为包级 helper，供 install_handler 和 node_handler 共用。
 func resolveMasterURL(c *gin.Context, externalURL string) string {
--- a/server/internal/http/node_handler.go
+++ b/server/internal/http/node_handler.go
@@ -244,14 +244,17 @@ func (h *NodeHandler) CreateInstallToken(c *gin.Context) {
 		input.TTLSeconds = 900
 	}

-	out, err := h.installTokenSvc.Create(c.Request.Context(), service.InstallTokenInput{
-		NodeID:       uint(id),
-		Mode:         input.Mode,
-		Arch:         input.Arch,
-		AgentVersion: input.AgentVersion,
-		DownloadSrc:  input.DownloadSrc,
-		TTLSeconds:   input.TTLSeconds,
-		CreatedByID:  h.resolveCurrentUserID(c),
+	out, err := h.installTokenSvc.CreateCommand(c.Request.Context(), service.InstallCommandInput{
+		InstallTokenInput: service.InstallTokenInput{
+			NodeID:       uint(id),
+			Mode:         input.Mode,
+			Arch:         input.Arch,
+			AgentVersion: input.AgentVersion,
+			DownloadSrc:  input.DownloadSrc,
+			TTLSeconds:   input.TTLSeconds,
+			CreatedByID:  h.resolveCurrentUserID(c),
+		},
+		MasterURL: resolveMasterURL(c, h.externalURL),
 	})
 	if err != nil {
 		response.Error(c, err)
@@ -261,15 +264,19 @@ func (h *NodeHandler) CreateInstallToken(c *gin.Context) {
 		fmt.Sprintf("%d", id), out.Node.Name,
 		fmt.Sprintf("生成 %s/%s install token TTL=%ds", input.Mode, input.Arch, input.TTLSeconds))

-	masterURL := resolveMasterURL(c, h.externalURL)
+	// 使用 /api/install/... 而非 /install/... —— 让反向代理的 /api/ 转发规则
+	// 自动接管，避免 SPA fallback 把请求当成前端路由返回 index.html（issue #46）。
+	// 同时返回 /install/... 备用地址，兼容会剥离 /api 前缀的外层反向代理。
+	// scriptBase64 让前端可以生成不依赖公开下载路径的嵌入式命令，解决 Lucky 等代理
+	// 把 /api/install/* 也 fallback 到 index.html 的场景。
 	body := gin.H{
-		"installToken": out.Token,
-		"expiresAt":    out.ExpiresAt,
-		"url":          masterURL + "/install/" + out.Token,
-		"composeUrl":   "",
-	}
-	if input.Mode == "docker" {
-		body["composeUrl"] = masterURL + "/install/" + out.Token + "/compose.yml"
+		"installToken":       out.Token,
+		"expiresAt":          out.ExpiresAt,
+		"url":                out.URL,
+		"fallbackUrl":        out.FallbackURL,
+		"scriptBase64":       out.ScriptBase64,
+		"composeUrl":         out.ComposeURL,
+		"fallbackComposeUrl": out.FallbackComposeURL,
 	}
 	response.Success(c, body)
 }
--- a/server/internal/http/report_handler.go
+++ b/server/internal/http/report_handler.go
@@ -0,0 +1,95 @@
+package http
+
+import (
+	"encoding/csv"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"backupx/server/internal/service"
+	"backupx/server/pkg/response"
+	"github.com/gin-gonic/gin"
+)
+
+type ReportHandler struct {
+	service *service.ReportService
+}
+
+func NewReportHandler(reportService *service.ReportService) *ReportHandler {
+	return &ReportHandler{service: reportService}
+}
+
+func reportDays(c *gin.Context) int {
+	days := 30
+	if v := strings.TrimSpace(c.Query("days")); v != "" {
+		if parsed, err := strconv.Atoi(v); err == nil && parsed > 0 {
+			days = parsed
+		}
+	}
+	return days
+}
+
+// Compliance 返回 JSON 合规报表（按任务的备份合规证据 + 汇总）。
+func (h *ReportHandler) Compliance(c *gin.Context) {
+	payload, err := h.service.ComplianceReport(c.Request.Context(), reportDays(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	response.Success(c, payload)
+}
+
+// ComplianceCSV 把合规报表导出为 CSV（供审计归档）。带 UTF-8 BOM 以便 Excel 正确识别中文。
+func (h *ReportHandler) ComplianceCSV(c *gin.Context) {
+	report, err := h.service.ComplianceReport(c.Request.Context(), reportDays(c))
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	filename := fmt.Sprintf("backupx-compliance-%s.csv", report.GeneratedAt.Format("20060102-150405"))
+	c.Header("Content-Type", "text/csv; charset=utf-8")
+	c.Header("Content-Disposition", "attachment; filename="+filename)
+	_, _ = c.Writer.WriteString("\ufeff") // UTF-8 BOM
+	w := csv.NewWriter(c.Writer)
+	_ = w.Write([]string{
+		"任务ID", "任务名", "类型", "启用", "节点", "加密", "保留天数", "SLA(RPO小时)",
+		"周期内运行", "成功", "失败", "成功率", "最近状态", "最近运行(UTC)", "最近成功(UTC)", "保护字节数", "合规判定",
+	})
+	for _, row := range report.Tasks {
+		_ = w.Write([]string{
+			strconv.FormatUint(uint64(row.TaskID), 10),
+			row.TaskName,
+			row.Type,
+			boolCN(row.Enabled),
+			row.NodeName,
+			boolCN(row.Encrypted),
+			strconv.Itoa(row.RetentionDays),
+			strconv.Itoa(row.SLAHoursRPO),
+			strconv.Itoa(row.TotalRuns),
+			strconv.Itoa(row.Successes),
+			strconv.Itoa(row.Failures),
+			fmt.Sprintf("%.2f%%", row.SuccessRate*100),
+			row.LastStatus,
+			fmtTimePtr(row.LastRunAt),
+			fmtTimePtr(row.LastSuccessAt),
+			strconv.FormatInt(row.ProtectedBytes, 10),
+			row.Risk,
+		})
+	}
+	w.Flush()
+}
+
+func boolCN(b bool) string {
+	if b {
+		return "是"
+	}
+	return "否"
+}
+
+func fmtTimePtr(t *time.Time) string {
+	if t == nil {
+		return ""
+	}
+	return t.UTC().Format("2006-01-02 15:04:05")
+}
--- a/server/internal/http/router.go
+++ b/server/internal/http/router.go
@@ -7,6 +7,7 @@ import (

 	"backupx/server/internal/apperror"
 	"backupx/server/internal/config"
+	"backupx/server/internal/metrics"
 	"backupx/server/internal/repository"
 	"backupx/server/internal/security"
 	"backupx/server/internal/service"
@@ -40,6 +41,7 @@ type RouterDependencies struct {
 	ApiKeyService            *service.ApiKeyService
 	NotificationService      *service.NotificationService
 	DashboardService         *service.DashboardService
+	ReportService            *service.ReportService
 	SettingsService          *service.SettingsService
 	NodeService              *service.NodeService
 	AgentService             *service.AgentService
@@ -52,6 +54,8 @@ type RouterDependencies struct {
 	MasterExternalURL        string
 	// DB 注入给健康检查端点做 liveness/readiness 探测。
 	DB *gorm.DB
+	// Metrics 注入给 /metrics 端点；为 nil 时端点返回 503。
+	Metrics *metrics.Metrics
 }

 func NewRouter(deps RouterDependencies) *gin.Engine {
@@ -91,9 +95,22 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 			auth.GET("/setup/status", authHandler.SetupStatus)
 			auth.POST("/setup", authHandler.Setup)
 			auth.POST("/login", authHandler.Login)
+			auth.POST("/otp/send", authHandler.SendLoginOTP)
+			auth.POST("/webauthn/login/options", authHandler.BeginWebAuthnLogin)
 			auth.POST("/logout", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.Logout)
 			auth.GET("/profile", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.Profile)
 			auth.PUT("/password", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.ChangePassword)
+			auth.POST("/2fa/setup", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.PrepareTwoFactor)
+			auth.POST("/2fa/enable", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.EnableTwoFactor)
+			auth.POST("/2fa/recovery-codes", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.RegenerateRecoveryCodes)
+			auth.DELETE("/2fa", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.DisableTwoFactor)
+			auth.PUT("/otp/config", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.ConfigureOTP)
+			auth.POST("/webauthn/register/options", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.BeginWebAuthnRegistration)
+			auth.POST("/webauthn/register/finish", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.FinishWebAuthnRegistration)
+			auth.GET("/webauthn/credentials", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.ListWebAuthnCredentials)
+			auth.DELETE("/webauthn/credentials/:id", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.DeleteWebAuthnCredential)
+			auth.GET("/trusted-devices", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.ListTrustedDevices)
+			auth.DELETE("/trusted-devices/:id", AuthMiddleware(deps.JWTManager, apiKeyAuth), authHandler.RevokeTrustedDevice)
 		}

 		system := api.Group("/system")
@@ -150,9 +167,11 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 		backupRecords.GET("/:id", backupRecordHandler.Get)
 		backupRecords.GET("/:id/logs/stream", backupRecordHandler.StreamLogs)
 		backupRecords.GET("/:id/download", backupRecordHandler.Download)
+		backupRecords.GET("/:id/contents", backupRecordHandler.Contents)
 		backupRecords.POST("/:id/restore", RequireNotViewer(), backupRecordHandler.Restore)
 		backupRecords.POST("/batch-delete", RequireNotViewer(), backupRecordHandler.BatchDelete)
 		backupRecords.DELETE("/:id", RequireNotViewer(), backupRecordHandler.Delete)
+		backupRecords.PUT("/:id/lock", RequireNotViewer(), backupRecordHandler.SetLock)

 		// 恢复记录独立命名空间：列表/详情/SSE 日志流。
 		// 创建恢复仍然走 POST /backup/records/:id/restore（以源备份记录为触发点）。
@@ -195,6 +214,15 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 			// 基于备份记录的验证入口：与 restore 对称
 			backupRecords.POST("/:id/verify", RequireNotViewer(), verificationHandler.TriggerByRecord)
 		}
+		// 企业合规报表：按任务的可导出备份合规证据（区别于 Dashboard 的实时聚合视图）。
+		if deps.ReportService != nil {
+			reportHandler := NewReportHandler(deps.ReportService)
+			reports := api.Group("/reports")
+			reports.Use(AuthMiddleware(deps.JWTManager, apiKeyAuth))
+			reports.GET("/compliance", reportHandler.Compliance)
+			reports.GET("/compliance/export", reportHandler.ComplianceCSV)
+		}
+
 		dashboard := api.Group("/dashboard")
 		dashboard.Use(AuthMiddleware(deps.JWTManager, apiKeyAuth))
 		dashboard.GET("/stats", dashboardHandler.Stats)
@@ -226,6 +254,7 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 			users.GET("", userHandler.List)
 			users.POST("", userHandler.Create)
 			users.PUT("/:id", userHandler.Update)
+			users.POST("/:id/2fa/reset", userHandler.ResetTwoFactor)
 			users.DELETE("/:id", userHandler.Delete)
 		}

@@ -275,11 +304,14 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 		nodes.POST("", RequireRole("admin"), nodeHandler.Create)
 		nodes.PUT("/:id", RequireRole("admin"), nodeHandler.Update)
 		nodes.DELETE("/:id", RequireRole("admin"), nodeHandler.Delete)
-		nodes.GET("/:id/fs/list", nodeHandler.ListDirectory)
-			nodes.POST("/batch", RequireRole("admin"), nodeHandler.BatchCreate)
-			nodes.POST("/:id/install-tokens", RequireRole("admin"), nodeHandler.CreateInstallToken)
-			nodes.POST("/:id/rotate-token", RequireRole("admin"), nodeHandler.RotateToken)
-			nodes.GET("/:id/install-script-preview", RequireRole("admin"), nodeHandler.PreviewScript)
+		// 文件浏览会枚举节点文件系统目录（含 /etc、/root 等），属敏感读操作：
+		// 限制为非 viewer（admin/operator），与"创建备份任务需选源路径"的权限对齐，
+		// 避免只读 viewer 借此探查服务器目录结构。
+		nodes.GET("/:id/fs/list", RequireNotViewer(), nodeHandler.ListDirectory)
+		nodes.POST("/batch", RequireRole("admin"), nodeHandler.BatchCreate)
+		nodes.POST("/:id/install-tokens", RequireRole("admin"), nodeHandler.CreateInstallToken)
+		nodes.POST("/:id/rotate-token", RequireRole("admin"), nodeHandler.RotateToken)
+		nodes.GET("/:id/install-script-preview", RequireRole("admin"), nodeHandler.PreviewScript)

 		// Agent API（token 认证，无需 JWT）
 		if deps.AgentService != nil {
@@ -290,7 +322,9 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 			agent.POST("/commands/:id/result", agentHandler.SubmitCommandResult)
 			agent.GET("/tasks/:id", agentHandler.GetTaskSpec)
 			agent.POST("/records/:id", agentHandler.UpdateRecord)
+			agent.PUT("/records/:id/artifacts/:targetId", agentHandler.UploadArtifact)
 			agent.GET("/restores/:id/spec", agentHandler.GetRestoreSpec)
+			agent.GET("/restores/:id/artifact", agentHandler.DownloadRestoreArtifact)
 			agent.POST("/restores/:id", agentHandler.UpdateRestore)

 			// Agent v1（安装脚本探活用），仅 Self 端点
@@ -311,7 +345,19 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 	engine.GET("/api/health", healthHandler.Live)
 	engine.GET("/api/ready", healthHandler.Ready)

-	// 公开安装路由（不走 JWT 中间件）
+	// Prometheus /metrics 端点（公开、无认证；内网/反向代理授权即可）。
+	// 业内通行做法：/metrics 通常由 Prometheus pull 抓取，不走 API Key。
+	if deps.Metrics != nil {
+		engine.GET("/metrics", gin.WrapH(deps.Metrics.Handler()))
+	}
+
+	// 公开安装路由（不走 JWT 中间件）。
+	// 同时注册到 / 和 /api 前缀下：
+	//   - /install/:token        保留历史 URL，兼容旧 nginx 部署
+	//   - /api/install/:token    新 URL，自动走反向代理的 /api/ 转发规则
+	//
+	// Issue #46：用户的 nginx 只转发 /api/，/install/* 被 SPA fallback 到 index.html，
+	// 返回 HTML 被 sh 解释成 "Syntax error"。使用 /api/install/ 可避开此问题。
 	if deps.InstallTokenService != nil {
 		gcCtx := deps.Context
 		if gcCtx == nil {
@@ -320,11 +366,29 @@ func NewRouter(deps RouterDependencies) *gin.Engine {
 		installHandler := NewInstallHandler(gcCtx, deps.InstallTokenService, deps.AuditService, deps.MasterExternalURL)
 		engine.GET("/install/:token", installHandler.Script)
 		engine.GET("/install/:token/compose.yml", installHandler.Compose)
+		engine.GET("/api/install/:token", installHandler.Script)
+		engine.GET("/api/install/:token/compose.yml", installHandler.Compose)
 	}

-	engine.NoRoute(func(c *gin.Context) {
+	// 未匹配路由处理：
+	//   - 找到前端产物目录时，托管 SPA（静态文件 + index.html 回退），
+	//     使后端在无 nginx 反向代理时也能直接提供 Web 控制台（issue #62）；
+	//   - 未找到前端目录时退化为纯 API 服务，统一返回结构化 JSON 404。
+	apiNotFound := func(c *gin.Context) {
 		response.Error(c, apperror.New(stdhttp.StatusNotFound, "NOT_FOUND", "接口不存在", errors.New("route not found")))
-	})
+	}
+	if webRoot := resolveWebRoot(deps.Config.Server.WebRoot); webRoot != "" {
+		if deps.Logger != nil {
+			deps.Logger.Info("serving web frontend", zap.String("web_root", webRoot))
+		}
+		engine.NoRoute(spaFileServer(webRoot, apiNotFound))
+	} else {
+		if deps.Logger != nil {
+			deps.Logger.Warn("web frontend directory not found; serving API only",
+				zap.String("hint", "set server.web_root in config, or place the built frontend at ./web"))
+		}
+		engine.NoRoute(apiNotFound)
+	}

 	return engine
 }
--- a/server/internal/http/router_test.go
+++ b/server/internal/http/router_test.go
@@ -16,50 +16,17 @@ import (
 	"backupx/server/internal/repository"
 	"backupx/server/internal/security"
 	"backupx/server/internal/service"
+	"backupx/server/internal/storage/codec"
+
+	"github.com/pquerna/otp/totp"
 )

 func TestSetupLoginAndProfileFlow(t *testing.T) {
-	tempDir := t.TempDir()
-	cfg := config.Config{
-		Server: config.ServerConfig{Host: "127.0.0.1", Port: 8340, Mode: "test"},
-		Database: config.DatabaseConfig{Path: filepath.Join(tempDir, "backupx.db")},
-		Security: config.SecurityConfig{JWTExpire: "24h"},
-		Log: config.LogConfig{Level: "error"},
-	}
-
-	log, err := logger.New(cfg.Log)
-	if err != nil {
-		t.Fatalf("logger.New error: %v", err)
-	}
-	db, err := database.Open(cfg.Database, log)
-	if err != nil {
-		t.Fatalf("database.Open error: %v", err)
-	}
-
-	userRepo := repository.NewUserRepository(db)
-	systemConfigRepo := repository.NewSystemConfigRepository(db)
-	resolved, err := service.ResolveSecurity(context.Background(), cfg.Security, systemConfigRepo)
-	if err != nil {
-		t.Fatalf("ResolveSecurity error: %v", err)
-	}
-	jwtManager := security.NewJWTManager(resolved.JWTSecret, time.Hour)
-	authService := service.NewAuthService(userRepo, systemConfigRepo, jwtManager, security.NewLoginRateLimiter(5, time.Minute))
-	systemService := service.NewSystemService(cfg, "test", time.Now().UTC())
-
-	router := NewRouter(RouterDependencies{
-		Config:           cfg,
-		Version:          "test",
-		Logger:           log,
-		AuthService:      authService,
-		SystemService:    systemService,
-		JWTManager:       jwtManager,
-		UserRepository:   userRepo,
-		SystemConfigRepo: systemConfigRepo,
-	})
+	router, _ := newTestHTTPRouter(t)

 	setupBody, _ := json.Marshal(map[string]string{
-		"username": "admin",
-		"password": "password-123",
+		"username":    "admin",
+		"password":    "password-123",
 		"displayName": "Admin",
 	})
 	setupRequest := httptest.NewRequest(http.MethodPost, "/api/auth/setup", bytes.NewBuffer(setupBody))
@@ -92,3 +59,143 @@ func TestSetupLoginAndProfileFlow(t *testing.T) {
 		t.Fatalf("expected profile 200, got %d", profileRecorder.Code)
 	}
 }
+
+func TestTrustedDeviceCookieSkipsMFA(t *testing.T) {
+	router, authService := newTestHTTPRouter(t)
+	if _, err := authService.Setup(context.Background(), service.SetupInput{
+		Username: "admin", Password: "password-123", DisplayName: "Admin",
+	}); err != nil {
+		t.Fatalf("Setup error: %v", err)
+	}
+	totpSetup, err := authService.PrepareTwoFactor(context.Background(), "1", service.TwoFactorSetupInput{
+		CurrentPassword: "password-123",
+	})
+	if err != nil {
+		t.Fatalf("PrepareTwoFactor error: %v", err)
+	}
+	enableCode, err := totp.GenerateCode(totpSetup.Secret, time.Now().UTC())
+	if err != nil {
+		t.Fatalf("GenerateCode error: %v", err)
+	}
+	if _, err := authService.EnableTwoFactor(context.Background(), "1", service.EnableTwoFactorInput{Code: enableCode}); err != nil {
+		t.Fatalf("EnableTwoFactor error: %v", err)
+	}
+
+	loginCode, err := totp.GenerateCode(totpSetup.Secret, time.Now().UTC())
+	if err != nil {
+		t.Fatalf("GenerateCode login error: %v", err)
+	}
+	loginBody, _ := json.Marshal(map[string]any{
+		"username":          "admin",
+		"password":          "password-123",
+		"twoFactorCode":     loginCode,
+		"rememberDevice":    true,
+		"trustedDeviceName": "test browser",
+	})
+	loginRequest := httptest.NewRequest(http.MethodPost, "/api/auth/login", bytes.NewBuffer(loginBody))
+	loginRequest.Header.Set("Content-Type", "application/json")
+	loginRecorder := httptest.NewRecorder()
+	router.ServeHTTP(loginRecorder, loginRequest)
+
+	if loginRecorder.Code != http.StatusOK {
+		t.Fatalf("expected login 200, got %d: %s", loginRecorder.Code, loginRecorder.Body.String())
+	}
+	trustedCookie := findCookie(loginRecorder.Result().Cookies(), trustedDeviceCookieName)
+	if trustedCookie == nil {
+		t.Fatalf("expected trusted device cookie")
+	}
+	if !trustedCookie.HttpOnly {
+		t.Fatalf("expected trusted device cookie to be HttpOnly")
+	}
+	if trustedCookie.Path != trustedDeviceCookiePath {
+		t.Fatalf("expected trusted device cookie path %q, got %q", trustedDeviceCookiePath, trustedCookie.Path)
+	}
+	var loginResponse struct {
+		Data struct {
+			Token              string                       `json:"token"`
+			TrustedDeviceToken string                       `json:"trustedDeviceToken"`
+			TrustedDevice      *service.TrustedDeviceOutput `json:"trustedDevice"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(loginRecorder.Body.Bytes(), &loginResponse); err != nil {
+		t.Fatalf("unmarshal login response: %v", err)
+	}
+	if loginResponse.Data.Token == "" || loginResponse.Data.TrustedDevice == nil {
+		t.Fatalf("expected login token and trusted device metadata")
+	}
+	if loginResponse.Data.TrustedDeviceToken != "" {
+		t.Fatalf("trusted device token should not be exposed in response body")
+	}
+
+	secondBody, _ := json.Marshal(map[string]string{
+		"username": "admin",
+		"password": "password-123",
+	})
+	secondRequest := httptest.NewRequest(http.MethodPost, "/api/auth/login", bytes.NewBuffer(secondBody))
+	secondRequest.Header.Set("Content-Type", "application/json")
+	secondRequest.AddCookie(trustedCookie)
+	secondRecorder := httptest.NewRecorder()
+	router.ServeHTTP(secondRecorder, secondRequest)
+
+	if secondRecorder.Code != http.StatusOK {
+		t.Fatalf("expected trusted device login 200, got %d: %s", secondRecorder.Code, secondRecorder.Body.String())
+	}
+}
+
+func newTestHTTPRouter(t *testing.T) (http.Handler, *service.AuthService) {
+	t.Helper()
+	tempDir := t.TempDir()
+	cfg := config.Config{
+		Server:   config.ServerConfig{Host: "127.0.0.1", Port: 8340, Mode: "test"},
+		Database: config.DatabaseConfig{Path: filepath.Join(tempDir, "backupx.db")},
+		Security: config.SecurityConfig{JWTExpire: "24h"},
+		Log:      config.LogConfig{Level: "error"},
+	}
+
+	log, err := logger.New(cfg.Log)
+	if err != nil {
+		t.Fatalf("logger.New error: %v", err)
+	}
+	db, err := database.Open(cfg.Database, log)
+	if err != nil {
+		t.Fatalf("database.Open error: %v", err)
+	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatalf("db.DB error: %v", err)
+	}
+	t.Cleanup(func() {
+		_ = sqlDB.Close()
+	})
+
+	userRepo := repository.NewUserRepository(db)
+	systemConfigRepo := repository.NewSystemConfigRepository(db)
+	resolved, err := service.ResolveSecurity(context.Background(), cfg.Security, systemConfigRepo)
+	if err != nil {
+		t.Fatalf("ResolveSecurity error: %v", err)
+	}
+	jwtManager := security.NewJWTManager(resolved.JWTSecret, time.Hour)
+	authService := service.NewAuthService(userRepo, systemConfigRepo, jwtManager, security.NewLoginRateLimiter(5, time.Minute), codec.NewConfigCipher(resolved.EncryptionKey))
+	systemService := service.NewSystemService(cfg, "test", time.Now().UTC())
+
+	router := NewRouter(RouterDependencies{
+		Config:           cfg,
+		Version:          "test",
+		Logger:           log,
+		AuthService:      authService,
+		SystemService:    systemService,
+		JWTManager:       jwtManager,
+		UserRepository:   userRepo,
+		SystemConfigRepo: systemConfigRepo,
+	})
+	return router, authService
+}
+
+func findCookie(cookies []*http.Cookie, name string) *http.Cookie {
+	for _, cookie := range cookies {
+		if cookie.Name == name {
+			return cookie
+		}
+	}
+	return nil
+}
--- a/server/internal/http/spa.go
+++ b/server/internal/http/spa.go
@@ -0,0 +1,86 @@
+package http
+
+import (
+	stdhttp "net/http"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// resolveWebRoot 返回前端静态资源目录。优先使用显式配置的路径，
+// 否则按部署惯例依次探测常见位置，返回首个包含 index.html 的目录。
+// 返回空字符串表示未找到前端产物，此时后端退化为纯 API 服务。
+func resolveWebRoot(configured string) string {
+	candidates := []string{
+		configured,
+		"./web/dist",  // 源码树根目录构建产物（优先于 ./web，避免命中前端源码模板）
+		"./web",       // systemd：WorkingDirectory=/opt/backupx → /opt/backupx/web；容器 WORKDIR=/app → /app/web
+		"../web/dist", // 从 server/ 目录运行（make dev-server）
+		"/opt/backupx/web",
+		"/app/web",
+	}
+	for _, dir := range candidates {
+		if strings.TrimSpace(dir) == "" {
+			continue
+		}
+		if hasIndexHTML(dir) {
+			if abs, err := filepath.Abs(dir); err == nil {
+				return abs
+			}
+			return dir
+		}
+	}
+	return ""
+}
+
+func hasIndexHTML(dir string) bool {
+	info, err := os.Stat(filepath.Join(dir, "index.html"))
+	return err == nil && !info.IsDir()
+}
+
+// isReservedBackendPath 判断请求是否命中后端保留前缀（API、探针、安装脚本）。
+// 这些路径即使未匹配到具体路由，也应返回结构化 JSON 404，而不是回退到
+// 前端 index.html —— 否则反向代理/安装脚本会把 HTML 当成接口响应（参考 issue #46）。
+func isReservedBackendPath(p string) bool {
+	switch p {
+	case "/health", "/ready", "/metrics", "/api", "/install":
+		return true
+	}
+	return strings.HasPrefix(p, "/api/") || strings.HasPrefix(p, "/install/")
+}
+
+// spaFileServer 构造 SPA 静态资源处理器，用作 gin 的 NoRoute 回退：
+//   - 后端保留前缀返回 apiNotFound（JSON 404）；
+//   - 其余 GET/HEAD 请求若在 webRoot 内命中真实文件则直接返回该文件；
+//   - 未命中文件的路径回退到 index.html，交由前端路由处理（history 模式刷新）。
+func spaFileServer(webRoot string, apiNotFound gin.HandlerFunc) gin.HandlerFunc {
+	indexPath := filepath.Join(webRoot, "index.html")
+	return func(c *gin.Context) {
+		reqPath := c.Request.URL.Path
+		if isReservedBackendPath(reqPath) {
+			apiNotFound(c)
+			return
+		}
+		if c.Request.Method != stdhttp.MethodGet && c.Request.Method != stdhttp.MethodHead {
+			apiNotFound(c)
+			return
+		}
+
+		// 防目录穿越：以 webRoot 为根清理路径，确保最终目标仍位于 webRoot 内。
+		clean := filepath.Clean("/" + strings.TrimPrefix(reqPath, "/"))
+		target := filepath.Join(webRoot, clean)
+		if rel, err := filepath.Rel(webRoot, target); err != nil || rel == ".." || strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
+			apiNotFound(c)
+			return
+		}
+
+		if info, err := os.Stat(target); err == nil && !info.IsDir() {
+			c.File(target)
+			return
+		}
+		// 前端 SPA 路由（/dashboard、/tasks 等）回退到 index.html。
+		c.File(indexPath)
+	}
+}
--- a/server/internal/http/spa_test.go
+++ b/server/internal/http/spa_test.go
@@ -0,0 +1,175 @@
+package http
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+func TestResolveWebRoot(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	t.Run("explicit configured dir with index.html", func(t *testing.T) {
+		dir := t.TempDir()
+		writeIndex(t, dir)
+		got := resolveWebRoot(dir)
+		abs, _ := filepath.Abs(dir)
+		if got != abs {
+			t.Fatalf("resolveWebRoot(%q) = %q, want %q", dir, got, abs)
+		}
+	})
+
+	t.Run("configured dir without index.html falls through to none", func(t *testing.T) {
+		dir := t.TempDir() // no index.html, and no conventional ./web in CWD during test
+		if got := resolveWebRoot(dir); got != "" {
+			// 允许 CWD 恰好存在约定目录的环境，但临时目录本身不应被选中。
+			abs, _ := filepath.Abs(dir)
+			if got == abs {
+				t.Fatalf("expected dir without index.html to be skipped, got %q", got)
+			}
+		}
+	})
+
+	t.Run("empty configured uses auto-detect order", func(t *testing.T) {
+		// 切到一个仅含 ./web/dist/index.html 的临时工作目录，验证自动探测。
+		root := t.TempDir()
+		distDir := filepath.Join(root, "web", "dist")
+		if err := os.MkdirAll(distDir, 0o755); err != nil {
+			t.Fatal(err)
+		}
+		writeIndex(t, distDir)
+
+		restore := chdir(t, root)
+		defer restore()
+
+		// 以 chdir 之后的实际工作目录为基准计算期望值，避免 macOS 上
+		// /var → /private/var 符号链接导致字符串不一致。
+		wd, err := os.Getwd()
+		if err != nil {
+			t.Fatal(err)
+		}
+		want := filepath.Join(wd, "web", "dist")
+
+		got := resolveWebRoot("")
+		if got != want {
+			t.Fatalf("auto-detect = %q, want %q", got, want)
+		}
+	})
+}
+
+func TestIsReservedBackendPath(t *testing.T) {
+	reserved := []string{"/health", "/ready", "/metrics", "/api", "/install", "/api/", "/api/system/info", "/install/abc", "/install/abc/compose.yml"}
+	for _, p := range reserved {
+		if !isReservedBackendPath(p) {
+			t.Errorf("isReservedBackendPath(%q) = false, want true", p)
+		}
+	}
+	notReserved := []string{"/", "/dashboard", "/assets/app.js", "/installer", "/apidocs", "/favicon.ico"}
+	for _, p := range notReserved {
+		if isReservedBackendPath(p) {
+			t.Errorf("isReservedBackendPath(%q) = true, want false", p)
+		}
+	}
+}
+
+func TestSpaFileServer(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	webRoot := t.TempDir()
+	writeIndexContent(t, webRoot, "<!doctype html><title>BackupX</title>")
+	assetsDir := filepath.Join(webRoot, "assets")
+	if err := os.MkdirAll(assetsDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(assetsDir, "app.js"), []byte("console.log(1)"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	apiNotFoundHit := false
+	apiNotFound := func(c *gin.Context) {
+		apiNotFoundHit = true
+		c.JSON(http.StatusNotFound, gin.H{"code": "NOT_FOUND"})
+	}
+
+	engine := gin.New()
+	engine.NoRoute(spaFileServer(webRoot, apiNotFound))
+
+	cases := []struct {
+		name       string
+		method     string
+		path       string
+		wantStatus int
+		wantBody   string // 子串；为空表示不校验
+		wantAPI404 bool
+	}{
+		{name: "root serves index", method: http.MethodGet, path: "/", wantStatus: 200, wantBody: "BackupX"},
+		{name: "spa route falls back to index", method: http.MethodGet, path: "/dashboard", wantStatus: 200, wantBody: "BackupX"},
+		{name: "real asset served", method: http.MethodGet, path: "/assets/app.js", wantStatus: 200, wantBody: "console.log"},
+		{name: "api path returns json 404", method: http.MethodGet, path: "/api/garbage", wantStatus: 404, wantAPI404: true},
+		{name: "health returns json 404 via reserved", method: http.MethodGet, path: "/health", wantStatus: 404, wantAPI404: true},
+		{name: "non-GET on spa path is api 404", method: http.MethodPost, path: "/dashboard", wantStatus: 404, wantAPI404: true},
+		{name: "directory falls back to index", method: http.MethodGet, path: "/assets/", wantStatus: 200, wantBody: "BackupX"},
+		// 含 ".." 的请求路径被 net/http 在文件服务层直接拒绝（400 invalid URL path），
+		// 绝不会泄露 webRoot 之外的文件；这是在 filepath.Rel 校验之上的纵深防御。
+		{name: "traversal rejected, never serves passwd", method: http.MethodGet, path: "/../../etc/passwd", wantStatus: 400, wantBody: "invalid URL path"},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			apiNotFoundHit = false
+			req := httptest.NewRequest(tc.method, tc.path, nil)
+			rec := httptest.NewRecorder()
+			engine.ServeHTTP(rec, req)
+
+			if rec.Code != tc.wantStatus {
+				t.Fatalf("status = %d, want %d (body=%q)", rec.Code, tc.wantStatus, rec.Body.String())
+			}
+			if tc.wantBody != "" && !contains(rec.Body.String(), tc.wantBody) {
+				t.Fatalf("body %q does not contain %q", rec.Body.String(), tc.wantBody)
+			}
+			if tc.wantAPI404 != apiNotFoundHit {
+				t.Fatalf("apiNotFoundHit = %v, want %v", apiNotFoundHit, tc.wantAPI404)
+			}
+		})
+	}
+}
+
+func writeIndex(t *testing.T, dir string) {
+	t.Helper()
+	writeIndexContent(t, dir, "<!doctype html><title>BackupX</title>")
+}
+
+func writeIndexContent(t *testing.T, dir, content string) {
+	t.Helper()
+	if err := os.WriteFile(filepath.Join(dir, "index.html"), []byte(content), 0o644); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func chdir(t *testing.T, dir string) func() {
+	t.Helper()
+	orig, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Chdir(dir); err != nil {
+		t.Fatal(err)
+	}
+	return func() { _ = os.Chdir(orig) }
+}
+
+func contains(s, sub string) bool {
+	return len(sub) == 0 || (len(s) >= len(sub) && indexOf(s, sub) >= 0)
+}
+
+func indexOf(s, sub string) int {
+	for i := 0; i+len(sub) <= len(s); i++ {
+		if s[i:i+len(sub)] == sub {
+			return i
+		}
+	}
+	return -1
+}
--- a/server/internal/http/storage_target_handler.go
+++ b/server/internal/http/storage_target_handler.go
@@ -199,7 +199,7 @@ func (h *StorageTargetHandler) GoogleDriveProfile(c *gin.Context) {

 func parseUintParam(c *gin.Context, key string) (uint, bool) {
 	value := strings.TrimSpace(c.Param(key))
-	parsed, err := strconv.ParseUint(value, 10, 64)
+	parsed, err := strconv.ParseUint(value, 10, 0)
 	if err != nil {
 		response.Error(c, apperror.BadRequest("INVALID_ID", fmt.Sprintf("参数 %s 不合法", key), err))
 		return 0, false
--- a/server/internal/http/user_handler.go
+++ b/server/internal/http/user_handler.go
@@ -78,3 +78,18 @@ func (h *UserHandler) Delete(c *gin.Context) {
 		fmt.Sprintf("删除用户 (ID: %d)", id))
 	response.Success(c, gin.H{"deleted": true})
 }
+
+func (h *UserHandler) ResetTwoFactor(c *gin.Context) {
+	id, ok := parseUintParam(c, "id")
+	if !ok {
+		return
+	}
+	item, err := h.service.ResetTwoFactor(c.Request.Context(), id)
+	if err != nil {
+		response.Error(c, err)
+		return
+	}
+	recordAudit(c, h.auditService, "user", "reset_two_factor", "user", fmt.Sprintf("%d", id), item.Username,
+		fmt.Sprintf("重置用户 %s 的 MFA", item.Username))
+	response.Success(c, item)
+}
--- a/server/internal/installscript/deploy_install_test.go
+++ b/server/internal/installscript/deploy_install_test.go
@@ -0,0 +1,61 @@
+package installscript
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestDeployInstallScriptSyntax(t *testing.T) {
+	scriptPath := filepath.Join("..", "..", "..", "deploy", "install.sh")
+	cmd := exec.Command("sh", "-n", scriptPath)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("install.sh syntax invalid: %v\n%s", err, output)
+	}
+}
+
+func TestDeployInstallScriptSupportsReleasePackageLayout(t *testing.T) {
+	scriptPath := filepath.Join("..", "..", "..", "deploy", "install.sh")
+	data, err := os.ReadFile(scriptPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	script := string(data)
+	for _, want := range []string{
+		`SCRIPT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)`,
+		`if [ -f "$SCRIPT_DIR/backupx" ] && [ -d "$SCRIPT_DIR/web" ]; then`,
+		`BIN_SOURCE="${BIN_SOURCE:-$SCRIPT_DIR/backupx}"`,
+		`WEB_SOURCE="${WEB_SOURCE:-$SCRIPT_DIR/web}"`,
+		`CONFIG_TEMPLATE="${CONFIG_TEMPLATE:-$SCRIPT_DIR/config.example.yaml}"`,
+		`发布包安装请确认当前目录包含 ./backupx、./web 和 ./install.sh。`,
+		`cat > "/etc/systemd/system/$SERVICE_NAME.service" <<UNIT`,
+		`if [ -d "/etc/nginx/conf.d" ] && [ -f "$NGINX_SOURCE" ]; then`,
+	} {
+		if !strings.Contains(script, want) {
+			t.Fatalf("install.sh missing %q", want)
+		}
+	}
+}
+
+func TestDeployInstallScriptSupportsSourceBuildAndVerifiesFirstSetup(t *testing.T) {
+	scriptPath := filepath.Join("..", "..", "..", "deploy", "install.sh")
+	data, err := os.ReadFile(scriptPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	script := string(data)
+	for _, want := range []string{
+		`SOURCE_BIN_DEFAULT="$PROJECT_ROOT/server/bin/backupx"`,
+		`For a source install, run 'make build' in the repository root first.`,
+		`HEALTH_URL="${HEALTH_URL:-http://127.0.0.1:8340/api/auth/setup/status}"`,
+		`systemctl is-active --quiet "$SERVICE_NAME"`,
+		`System setup`,
+	} {
+		if !strings.Contains(script, want) {
+			t.Fatalf("install.sh missing %q", want)
+		}
+	}
+}
--- a/server/internal/installscript/issue46_test.go
+++ b/server/internal/installscript/issue46_test.go
@@ -0,0 +1,58 @@
+package installscript
+
+import (
+	"strings"
+	"testing"
+
+	"backupx/server/internal/model"
+)
+
+// TestRenderScriptIncludesMagicMarker 渲染脚本必须包含 Issue #46 引入的魔数注释，
+// 方便用户通过 `head -3 脚本` 自查是否被中间层改写。
+func TestRenderScriptIncludesMagicMarker(t *testing.T) {
+	for _, mode := range []string{model.InstallModeSystemd, model.InstallModeDocker, model.InstallModeForeground} {
+		ctx := testCtx
+		ctx.Mode = mode
+		got, err := RenderScript(ctx)
+		if err != nil {
+			t.Fatalf("render err (%s): %v", mode, err)
+		}
+		if !strings.Contains(got, "BACKUPX_AGENT_INSTALL_V1") {
+			t.Errorf("mode=%s: script missing magic marker:\n%s", mode, got)
+		}
+	}
+}
+
+// TestRenderScriptBashBootstrap 脚本顶部必须有 bash 自举段，文件执行时跳到 bash。
+func TestRenderScriptBashBootstrap(t *testing.T) {
+	got, err := RenderScript(testCtx)
+	if err != nil {
+		t.Fatalf("render err: %v", err)
+	}
+	if !strings.Contains(got, `[ -z "${BASH_VERSION:-}" ]`) {
+		t.Errorf("script missing bash bootstrap guard:\n%s", got)
+	}
+	if !strings.Contains(got, `exec bash "$0" "$@"`) {
+		t.Errorf("script missing exec bash fallback:\n%s", got)
+	}
+}
+
+func TestRenderScriptUsesRootForBareMetalBackups(t *testing.T) {
+	got, err := RenderScript(testCtx)
+	if err != nil {
+		t.Fatalf("render err: %v", err)
+	}
+	for _, want := range []string{
+		"/var/lib/backupx-agent/tmp",
+		"install -d -m 0700 /var/lib/backupx-agent /var/lib/backupx-agent/tmp",
+	} {
+		if !strings.Contains(got, want) {
+			t.Errorf("script missing %q:\n%s", want, got)
+		}
+	}
+	for _, forbidden := range []string{"User=backupx", "Group=backupx", "NoNewPrivileges=true"} {
+		if strings.Contains(got, forbidden) {
+			t.Errorf("script should not contain %q for bare-metal backups:\n%s", forbidden, got)
+		}
+	}
+}
--- a/server/internal/installscript/renderer_test.go
+++ b/server/internal/installscript/renderer_test.go
@@ -1,6 +1,8 @@
 package installscript

 import (
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"

@@ -27,8 +29,10 @@ func TestRenderScriptSystemd(t *testing.T) {
 	mustContain := []string{
 		"BACKUPX_AGENT_MASTER=${MASTER_URL}",
 		`Environment="BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}"`,
+		"/var/lib/backupx-agent/tmp",
 		"systemctl daemon-reload",
 		"systemctl enable --now backupx-agent",
+		"systemctl status backupx-agent",
 		"X-Agent-Token: ${AGENT_TOKEN}",
 		"MASTER_URL=\"https://master.example.com\"",
 		"AGENT_TOKEN=\"deadbeefcafebabe0123456789abcdef0123456789abcdef0123456789abcdef\"",
@@ -56,6 +60,9 @@ func TestRenderScriptForeground(t *testing.T) {
 	if !strings.Contains(got, `exec "${INSTALL_PREFIX}/backupx" agent`) {
 		t.Errorf("foreground script missing exec line:\n%s", got)
 	}
+	if !strings.Contains(got, "/var/lib/backupx-agent/tmp") {
+		t.Errorf("foreground script missing dedicated temp dir:\n%s", got)
+	}
 	if strings.Contains(got, "systemctl daemon-reload") {
 		t.Errorf("foreground script should not reference systemctl:\n%s", got)
 	}
@@ -74,14 +81,44 @@ func TestRenderScriptDocker(t *testing.T) {
 	if !strings.Contains(got, "docker run") {
 		t.Errorf("docker script missing `docker run`:\n%s", got)
 	}
+	if !strings.Contains(got, "/var/lib/backupx-agent:/var/lib/backupx-agent") {
+		t.Errorf("docker script missing agent data volume:\n%s", got)
+	}
 	if !strings.Contains(got, "awuqing/backupx:${AGENT_VERSION}") {
 		t.Errorf("docker script missing image tag reference:\n%s", got)
 	}
+	if !strings.Contains(got, `"awuqing/backupx:${AGENT_VERSION}" agent`) {
+		t.Errorf("docker script must start image in agent mode:\n%s", got)
+	}
+	if !strings.Contains(got, `-e "BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp"`) {
+		t.Errorf("docker script missing temp dir env:\n%s", got)
+	}
+	if !strings.Contains(got, `docker logs --tail=100 backupx-agent`) {
+		t.Errorf("docker script missing diagnostic log command:\n%s", got)
+	}
+	if !strings.Contains(got, `grep -q '"status":"online"'`) {
+		t.Errorf("docker script missing online probe:\n%s", got)
+	}
 	if strings.Contains(got, "systemctl daemon-reload") {
 		t.Errorf("docker script should not reference systemctl:\n%s", got)
 	}
 }

+func TestDockerEntrypointForwardsAgentSubcommand(t *testing.T) {
+	entrypointPath := filepath.Join("..", "..", "..", "deploy", "docker", "entrypoint.sh")
+	got, err := os.ReadFile(entrypointPath)
+	if err != nil {
+		t.Fatalf("read docker entrypoint: %v", err)
+	}
+	script := string(got)
+	if !strings.Contains(script, `"${1:-}" = "agent"`) {
+		t.Fatalf("entrypoint must detect the agent subcommand before starting server:\n%s", script)
+	}
+	if !strings.Contains(script, `exec /app/bin/backupx "$@"`) {
+		t.Fatalf("entrypoint must exec backupx with forwarded args:\n%s", script)
+	}
+}
+
 func TestRenderComposeYaml(t *testing.T) {
 	ctx := testCtx
 	ctx.Mode = model.InstallModeDocker
@@ -92,17 +129,26 @@ func TestRenderComposeYaml(t *testing.T) {
 	if !strings.Contains(got, "image: awuqing/backupx:v1.7.0") {
 		t.Errorf("compose missing image:\n%s", got)
 	}
+	if !strings.Contains(got, `command: ["agent"]`) {
+		t.Errorf("compose must start image in agent mode:\n%s", got)
+	}
 	if !strings.Contains(got, `BACKUPX_AGENT_TOKEN: "deadbeefcafebabe0123456789abcdef0123456789abcdef0123456789abcdef"`) {
 		t.Errorf("compose missing token env:\n%s", got)
 	}
+	if !strings.Contains(got, `BACKUPX_AGENT_TEMP_DIR: "/var/lib/backupx-agent/tmp"`) {
+		t.Errorf("compose missing temp dir env:\n%s", got)
+	}
+	if !strings.Contains(got, "/var/lib/backupx-agent:/var/lib/backupx-agent") {
+		t.Errorf("compose missing agent data volume:\n%s", got)
+	}
 }

 func TestRenderScriptRejectsInjectedMasterURL(t *testing.T) {
 	bad := []string{
 		"https://example.com\" other: inject", // 含引号和空格
-		"javascript:alert(1)",                  // scheme 非法
-		"https://example.com\n- privileged",    // 含换行，YAML 注入经典 payload
-		"",                                     // 空
+		"javascript:alert(1)",                 // scheme 非法
+		"https://example.com\n- privileged",   // 含换行，YAML 注入经典 payload
+		"",                                    // 空
 	}
 	for _, u := range bad {
 		ctx := testCtx
@@ -161,8 +207,8 @@ func TestDownloadBaseMapping(t *testing.T) {

 func TestRenderScriptDefaultsApplied(t *testing.T) {
 	ctx := testCtx
-	ctx.InstallPrefix = ""   // 应被默认为 /opt/backupx-agent
-	ctx.DownloadBase = ""    // 应被默认为 github
+	ctx.InstallPrefix = "" // 应被默认为 /opt/backupx-agent
+	ctx.DownloadBase = ""  // 应被默认为 github
 	got, err := RenderScript(ctx)
 	if err != nil {
 		t.Fatalf("render err: %v", err)
--- a/server/internal/installscript/templates/agent-compose.yml.tmpl
+++ b/server/internal/installscript/templates/agent-compose.yml.tmpl
@@ -9,5 +9,6 @@ services:
    environment:
      BACKUPX_AGENT_MASTER: "{{.MasterURL}}"
      BACKUPX_AGENT_TOKEN: "{{.AgentToken}}"
+      BACKUPX_AGENT_TEMP_DIR: "/var/lib/backupx-agent/tmp"
    volumes:
-      - /var/lib/backupx-agent:/tmp/backupx-agent
+      - /var/lib/backupx-agent:/var/lib/backupx-agent
--- a/server/internal/installscript/templates/agent-install.sh.tmpl
+++ b/server/internal/installscript/templates/agent-install.sh.tmpl
@@ -1,8 +1,16 @@
 #!/bin/sh
 # BackupX Agent 一键安装脚本（由 Master 动态渲染）
+# Magic: BACKUPX_AGENT_INSTALL_V1  —— 若 `head -3 脚本` 看不到此行，说明反向代理/CDN 改写了响应
 # 模式: {{.Mode}} | 架构: {{.Arch}} | 版本: {{.AgentVersion}}
 set -eu

+# 自举到 bash（文件执行模式下生效；管道模式 $0 不是文件，exec 会静默失败，继续用 sh）。
+# 动机：部分 Debian/Ubuntu 用户通过 `curl | sudo sh` 触发时，dash 对本脚本报语法错误；
+# 若目标机装有 bash，优先切换到 bash 获得更一致的行为。
+if [ -z "${BASH_VERSION:-}" ] && command -v bash >/dev/null 2>&1 && [ -f "$0" ]; then
+    exec bash "$0" "$@"
+fi
+
 MASTER_URL="{{.MasterURL}}"
 AGENT_TOKEN="{{.AgentToken}}"
 AGENT_VERSION="{{.AgentVersion}}"
@@ -39,10 +47,10 @@ else
 fi
 tar xzf "$TMPDIR/pkg.tar.gz" -C "$TMPDIR"

-# 4. 安装二进制 + 用户
+# 4. 安装二进制 + 数据目录
 echo "[2/4] 安装到 ${INSTALL_PREFIX}"
-id backupx >/dev/null 2>&1 || useradd --system --home-dir "$INSTALL_PREFIX" --shell /usr/sbin/nologin backupx
-install -d -o backupx -g backupx "$INSTALL_PREFIX" /var/lib/backupx-agent
+install -d -m 0755 "$INSTALL_PREFIX"
+install -d -m 0700 /var/lib/backupx-agent /var/lib/backupx-agent/tmp
 install -m 0755 "$TMPDIR/backupx-${AGENT_VERSION}-linux-${ARCH}/backupx" "$INSTALL_PREFIX/backupx"
 {{end}}

@@ -57,13 +65,13 @@ Wants=network-online.target

 [Service]
 Type=simple
-User=backupx
 Environment="BACKUPX_AGENT_MASTER=${MASTER_URL}"
 Environment="BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}"
-ExecStart=${INSTALL_PREFIX}/backupx agent --temp-dir /var/lib/backupx-agent
+ExecStart=${INSTALL_PREFIX}/backupx agent --temp-dir /var/lib/backupx-agent/tmp
 Restart=on-failure
 RestartSec=10s
-NoNewPrivileges=true
+# Agent 需以 root 运行以读取任意源数据；与单机服务端保持一致的资源/句柄上限。
+LimitNOFILE=65535

 [Install]
 WantedBy=multi-user.target
@@ -82,6 +90,7 @@ for i in $(seq 1 15); do
    fi
 done
 echo "⚠ 30s 内未收到上线心跳，请检查防火墙或 journalctl -u backupx-agent"
+echo "提示：systemd 服务名是 backupx-agent，可执行 systemctl status backupx-agent 查看状态。"
 exit 2
 {{end}}

@@ -90,7 +99,7 @@ exit 2
 echo "[3/3] 前台启动 agent（Ctrl+C 退出）"
 export BACKUPX_AGENT_MASTER="${MASTER_URL}"
 export BACKUPX_AGENT_TOKEN="${AGENT_TOKEN}"
-exec "${INSTALL_PREFIX}/backupx" agent --temp-dir /var/lib/backupx-agent
+exec "${INSTALL_PREFIX}/backupx" agent --temp-dir /var/lib/backupx-agent/tmp
 {{end}}

 {{if eq .Mode "docker"}}
@@ -102,7 +111,20 @@ docker rm -f backupx-agent >/dev/null 2>&1 || true
 docker run -d --name backupx-agent --restart=unless-stopped \
    -e "BACKUPX_AGENT_MASTER=${MASTER_URL}" \
    -e "BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}" \
-    -v /var/lib/backupx-agent:/tmp/backupx-agent \
+    -e "BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp" \
+    -v /var/lib/backupx-agent:/var/lib/backupx-agent \
    "awuqing/backupx:${AGENT_VERSION}" agent
-echo "✓ 容器已启动"
+echo "✓ 容器已启动，等待节点上线"
+for i in $(seq 1 15); do
+    sleep 2
+    if curl -fsSL -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null \
+        | grep -q '"status":"online"'; then
+        echo "✓ 节点已上线"
+        exit 0
+    fi
+done
+echo "⚠ 30s 内未收到上线心跳，请检查容器状态、网络与 Master URL。"
+echo "排查命令：docker ps -a --filter name=backupx-agent"
+echo "排查命令：docker logs --tail=100 backupx-agent"
+exit 2
 {{end}}
--- a/server/internal/metrics/collector.go
+++ b/server/internal/metrics/collector.go
@@ -0,0 +1,167 @@
+package metrics
+
+import (
+	"context"
+	"time"
+
+	"backupx/server/internal/model"
+	"backupx/server/internal/repository"
+)
+
+// SampleSource 抽象 Collector 需要的仓储访问，便于单测替换。
+type SampleSource interface {
+	ListStorageTargets(ctx context.Context) ([]model.StorageTarget, error)
+	StorageUsage(ctx context.Context) ([]repository.BackupStorageUsageItem, error)
+	ListNodes(ctx context.Context) ([]model.Node, error)
+	AgentQueueSummaries(ctx context.Context) (map[uint]repository.AgentCommandQueueSummary, error)
+	CountSLABreach(ctx context.Context) (int, error)
+}
+
+// repoSource 把 repository 适配到 SampleSource。
+type repoSource struct {
+	targets  repository.StorageTargetRepository
+	records  repository.BackupRecordRepository
+	nodes    repository.NodeRepository
+	tasks    repository.BackupTaskRepository
+	commands repository.AgentCommandRepository
+	now      func() time.Time
+}
+
+// NewRepoSource 用仓储实例构造 SampleSource。
+func NewRepoSource(
+	targets repository.StorageTargetRepository,
+	records repository.BackupRecordRepository,
+	nodes repository.NodeRepository,
+	tasks repository.BackupTaskRepository,
+	commands repository.AgentCommandRepository,
+) SampleSource {
+	return &repoSource{
+		targets:  targets,
+		records:  records,
+		nodes:    nodes,
+		tasks:    tasks,
+		commands: commands,
+		now:      func() time.Time { return time.Now().UTC() },
+	}
+}
+
+func (s *repoSource) ListStorageTargets(ctx context.Context) ([]model.StorageTarget, error) {
+	return s.targets.List(ctx)
+}
+
+func (s *repoSource) StorageUsage(ctx context.Context) ([]repository.BackupStorageUsageItem, error) {
+	return s.records.StorageUsage(ctx)
+}
+
+func (s *repoSource) ListNodes(ctx context.Context) ([]model.Node, error) {
+	return s.nodes.List(ctx)
+}
+
+func (s *repoSource) AgentQueueSummaries(ctx context.Context) (map[uint]repository.AgentCommandQueueSummary, error) {
+	if s.commands == nil {
+		return nil, nil
+	}
+	return s.commands.NodeQueueSummaries(ctx)
+}
+
+// CountSLABreach 统计当前违反 RPO 的任务：
+//   - 任务启用且配置了 SLAHoursRPO > 0
+//   - 最近一次成功备份距今超出 SLA 时间窗，或从未成功过
+func (s *repoSource) CountSLABreach(ctx context.Context) (int, error) {
+	tasks, err := s.tasks.List(ctx, repository.BackupTaskListOptions{})
+	if err != nil {
+		return 0, err
+	}
+	now := s.now()
+	count := 0
+	for i := range tasks {
+		task := &tasks[i]
+		if task.SLAHoursRPO <= 0 || !task.Enabled {
+			continue
+		}
+		threshold := now.Add(-time.Duration(task.SLAHoursRPO) * time.Hour)
+		if task.LastRunAt == nil || task.LastRunAt.Before(threshold) {
+			count++
+		}
+	}
+	return count, nil
+}
+
+// Collector 周期性采集 gauge 类指标（存储用量、节点在线、SLA 违约）。
+// 用后台 goroutine 驱动，避免在 /metrics 请求路径做慢 IO。
+type Collector struct {
+	metrics  *Metrics
+	source   SampleSource
+	interval time.Duration
+}
+
+// NewCollector 创建周期采集器。interval=0 走默认 30s。
+func NewCollector(m *Metrics, source SampleSource, interval time.Duration) *Collector {
+	if interval <= 0 {
+		interval = 30 * time.Second
+	}
+	return &Collector{metrics: m, source: source, interval: interval}
+}
+
+// Start 在后台运行采集循环；随 ctx 取消而终止。
+// 启动时立即采一次，之后按 interval 轮询。
+func (c *Collector) Start(ctx context.Context) {
+	if c == nil || c.metrics == nil || c.source == nil {
+		return
+	}
+	go func() {
+		c.collect(ctx)
+		ticker := time.NewTicker(c.interval)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				c.collect(ctx)
+			}
+		}
+	}()
+}
+
+// collect 执行一次采样；单轮失败不影响下次。
+func (c *Collector) collect(ctx context.Context) {
+	// 存储用量：按 StorageTargetID 聚合 file_size，对应 target name/type
+	if targets, err := c.source.ListStorageTargets(ctx); err == nil {
+		nameByID := make(map[uint]string, len(targets))
+		typeByID := make(map[uint]string, len(targets))
+		for i := range targets {
+			nameByID[targets[i].ID] = targets[i].Name
+			typeByID[targets[i].ID] = targets[i].Type
+		}
+		if usage, uerr := c.source.StorageUsage(ctx); uerr == nil {
+			c.metrics.ResetStorageUsed()
+			for _, item := range usage {
+				name := nameByID[item.StorageTargetID]
+				if name == "" {
+					continue
+				}
+				c.metrics.SetStorageUsed(name, typeByID[item.StorageTargetID], item.TotalSize)
+			}
+		}
+	}
+	// 节点在线状态：role 约定为 master / agent
+	if nodes, err := c.source.ListNodes(ctx); err == nil {
+		queueByNode, _ := c.source.AgentQueueSummaries(ctx)
+		c.metrics.ResetNodeOnline()
+		c.metrics.ResetAgentQueue()
+		for i := range nodes {
+			n := &nodes[i]
+			role := "agent"
+			if n.IsLocal {
+				role = "master"
+			}
+			c.metrics.SetNodeOnline(n.Name, role, n.Status == model.NodeStatusOnline)
+			queue := queueByNode[n.ID]
+			c.metrics.SetAgentQueue(n.Name, role, queue.Depth, queue.Running, queue.Timeouts)
+		}
+	}
+	if breach, err := c.source.CountSLABreach(ctx); err == nil {
+		c.metrics.SetSLABreach(breach)
+	}
+}
--- a/server/internal/metrics/registry.go
+++ b/server/internal/metrics/registry.go
@@ -0,0 +1,264 @@
+// Package metrics 暴露 BackupX 的 Prometheus 采集器。
+//
+// 设计要点：
+//   - 使用独立 Registry，避免与 default registry 中的 Go runtime metrics 混淆
+//   - Counter/Gauge/Histogram 全部以 backupx_ 为前缀，遵循 Prometheus 命名规范
+//   - 所有指标都支持零值：未注入时调用方法是 no-op，不会 panic
+//   - 组件只依赖本包，不反向引用 service/repository，避免循环
+package metrics
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+// Metrics 聚合所有采集器，由 app 层组装一次并按需注入到 service。
+type Metrics struct {
+	registry *prometheus.Registry
+
+	// 任务执行计数（labels: status, task_type）
+	TaskRunTotal *prometheus.CounterVec
+	// 任务耗时分布（labels: task_type）
+	TaskRunDuration *prometheus.HistogramVec
+	// 任务产出字节数（labels: task_type）
+	TaskBytesTotal *prometheus.CounterVec
+	// 正在运行的任务数
+	TaskRunningGauge prometheus.Gauge
+	// 存储目标用量（labels: target_name, target_type）
+	StorageUsedBytes *prometheus.GaugeVec
+	// 节点在线状态（labels: node_name, role；value: 0/1）
+	NodeOnline *prometheus.GaugeVec
+	// Agent 命令队列深度（labels: node_name, role）
+	AgentCommandQueueDepth *prometheus.GaugeVec
+	// Agent 正在执行的长命令数（labels: node_name, role）
+	AgentCommandRunning *prometheus.GaugeVec
+	// Agent 命令超时累计数快照（labels: node_name, role）
+	AgentCommandTimeoutTotal *prometheus.GaugeVec
+	// 验证演练结果（labels: status）
+	VerifyRunTotal *prometheus.CounterVec
+	// 恢复操作结果（labels: status）
+	RestoreRunTotal *prometheus.CounterVec
+	// 副本复制结果（labels: status）
+	ReplicationRunTotal *prometheus.CounterVec
+	// SLA 违约数（gauge）
+	SLABreachGauge prometheus.Gauge
+	// 应用信息（label: version）
+	AppInfo *prometheus.GaugeVec
+}
+
+// New 构造并注册所有采集器。
+// 失败时 panic：采集器注册失败属于启动期编程错误，没有合理 fallback。
+func New(version string) *Metrics {
+	reg := prometheus.NewRegistry()
+	// 注入标准 Go runtime + process 指标
+	reg.MustRegister(collectors.NewGoCollector())
+	reg.MustRegister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
+
+	m := &Metrics{
+		registry: reg,
+		TaskRunTotal: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "backupx_task_run_total",
+			Help: "备份任务执行总数，按状态和任务类型细分",
+		}, []string{"status", "task_type"}),
+		TaskRunDuration: prometheus.NewHistogramVec(prometheus.HistogramOpts{
+			Name:    "backupx_task_run_duration_seconds",
+			Help:    "备份任务耗时分布",
+			Buckets: []float64{1, 5, 15, 30, 60, 120, 300, 600, 1800, 3600, 7200},
+		}, []string{"task_type"}),
+		TaskBytesTotal: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "backupx_task_bytes_total",
+			Help: "备份任务累计产出字节数",
+		}, []string{"task_type"}),
+		TaskRunningGauge: prometheus.NewGauge(prometheus.GaugeOpts{
+			Name: "backupx_task_running",
+			Help: "当前正在执行的备份任务数",
+		}),
+		StorageUsedBytes: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_storage_used_bytes",
+			Help: "存储目标已用字节数",
+		}, []string{"target_name", "target_type"}),
+		NodeOnline: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_node_online",
+			Help: "集群节点在线状态（1 在线 / 0 离线）",
+		}, []string{"node_name", "role"}),
+		AgentCommandQueueDepth: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_agent_command_queue_depth",
+			Help: "Agent 当前 pending/dispatched 命令总数",
+		}, []string{"node_name", "role"}),
+		AgentCommandRunning: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_agent_command_running",
+			Help: "Agent 当前正在执行的长命令数",
+		}, []string{"node_name", "role"}),
+		AgentCommandTimeoutTotal: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_agent_command_timeout_total",
+			Help: "Agent 已超时命令数快照",
+		}, []string{"node_name", "role"}),
+		VerifyRunTotal: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "backupx_verify_run_total",
+			Help: "备份验证演练执行总数",
+		}, []string{"status"}),
+		RestoreRunTotal: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "backupx_restore_run_total",
+			Help: "恢复操作执行总数",
+		}, []string{"status"}),
+		ReplicationRunTotal: prometheus.NewCounterVec(prometheus.CounterOpts{
+			Name: "backupx_replication_run_total",
+			Help: "备份副本复制执行总数",
+		}, []string{"status"}),
+		SLABreachGauge: prometheus.NewGauge(prometheus.GaugeOpts{
+			Name: "backupx_sla_breach_tasks",
+			Help: "当前违反 SLA/RPO 的任务数",
+		}),
+		AppInfo: prometheus.NewGaugeVec(prometheus.GaugeOpts{
+			Name: "backupx_app_info",
+			Help: "BackupX 应用元信息（恒为 1，通过 label 暴露版本号）",
+		}, []string{"version"}),
+	}
+	reg.MustRegister(
+		m.TaskRunTotal,
+		m.TaskRunDuration,
+		m.TaskBytesTotal,
+		m.TaskRunningGauge,
+		m.StorageUsedBytes,
+		m.NodeOnline,
+		m.AgentCommandQueueDepth,
+		m.AgentCommandRunning,
+		m.AgentCommandTimeoutTotal,
+		m.VerifyRunTotal,
+		m.RestoreRunTotal,
+		m.ReplicationRunTotal,
+		m.SLABreachGauge,
+		m.AppInfo,
+	)
+	m.AppInfo.WithLabelValues(version).Set(1)
+	return m
+}
+
+// Handler 返回 /metrics 的 HTTP handler。
+// 使用本包专属 registry，避免混入其他组件的默认 metrics。
+func (m *Metrics) Handler() http.Handler {
+	if m == nil {
+		return http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+			http.Error(w, "metrics disabled", http.StatusServiceUnavailable)
+		})
+	}
+	return promhttp.HandlerFor(m.registry, promhttp.HandlerOpts{
+		EnableOpenMetrics: false,
+	})
+}
+
+// ObserveTaskRun 记录一次任务执行结果。
+// status 常用值：success / failed / cancelled。nil 接收器安全。
+func (m *Metrics) ObserveTaskRun(taskType, status string, durationSec float64, bytes int64) {
+	if m == nil {
+		return
+	}
+	m.TaskRunTotal.WithLabelValues(status, taskType).Inc()
+	m.TaskRunDuration.WithLabelValues(taskType).Observe(durationSec)
+	if bytes > 0 {
+		m.TaskBytesTotal.WithLabelValues(taskType).Add(float64(bytes))
+	}
+}
+
+// IncTaskRunning / DecTaskRunning 配套使用，反映并发中任务数。
+func (m *Metrics) IncTaskRunning() {
+	if m == nil {
+		return
+	}
+	m.TaskRunningGauge.Inc()
+}
+
+func (m *Metrics) DecTaskRunning() {
+	if m == nil {
+		return
+	}
+	m.TaskRunningGauge.Dec()
+}
+
+// ObserveRestore / ObserveVerify / ObserveReplication 记录子动作结果。
+// 所有方法对 nil 接收器安全：未注入 Metrics 时静默降级，不 panic。
+func (m *Metrics) ObserveRestore(status string) {
+	if m == nil {
+		return
+	}
+	m.RestoreRunTotal.WithLabelValues(status).Inc()
+}
+
+func (m *Metrics) ObserveVerify(status string) {
+	if m == nil {
+		return
+	}
+	m.VerifyRunTotal.WithLabelValues(status).Inc()
+}
+
+func (m *Metrics) ObserveReplication(status string) {
+	if m == nil {
+		return
+	}
+	m.ReplicationRunTotal.WithLabelValues(status).Inc()
+}
+
+// SetStorageUsed 刷新某存储目标的用量。调用方负责周期采集。
+func (m *Metrics) SetStorageUsed(name, targetType string, bytes int64) {
+	if m == nil {
+		return
+	}
+	m.StorageUsedBytes.WithLabelValues(name, targetType).Set(float64(bytes))
+}
+
+// SetNodeOnline 刷新节点在线状态。
+func (m *Metrics) SetNodeOnline(name, role string, online bool) {
+	if m == nil {
+		return
+	}
+	val := 0.0
+	if online {
+		val = 1
+	}
+	m.NodeOnline.WithLabelValues(name, role).Set(val)
+}
+
+// ResetNodeOnline 清空节点 gauge（当节点被删除时避免残留指标）。
+func (m *Metrics) ResetNodeOnline() {
+	if m == nil {
+		return
+	}
+	m.NodeOnline.Reset()
+}
+
+func (m *Metrics) SetAgentQueue(name, role string, depth, running, timeoutCount int) {
+	if m == nil {
+		return
+	}
+	m.AgentCommandQueueDepth.WithLabelValues(name, role).Set(float64(depth))
+	m.AgentCommandRunning.WithLabelValues(name, role).Set(float64(running))
+	m.AgentCommandTimeoutTotal.WithLabelValues(name, role).Set(float64(timeoutCount))
+}
+
+func (m *Metrics) ResetAgentQueue() {
+	if m == nil {
+		return
+	}
+	m.AgentCommandQueueDepth.Reset()
+	m.AgentCommandRunning.Reset()
+	m.AgentCommandTimeoutTotal.Reset()
+}
+
+// ResetStorageUsed 清空存储目标 gauge。
+func (m *Metrics) ResetStorageUsed() {
+	if m == nil {
+		return
+	}
+	m.StorageUsedBytes.Reset()
+}
+
+// SetSLABreach 刷新 SLA 违约任务数。
+func (m *Metrics) SetSLABreach(count int) {
+	if m == nil {
+		return
+	}
+	m.SLABreachGauge.Set(float64(count))
+}
--- a/server/internal/metrics/registry_test.go
+++ b/server/internal/metrics/registry_test.go
@@ -0,0 +1,82 @@
+package metrics
+
+import (
+	"io"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/prometheus/client_golang/prometheus/testutil"
+)
+
+func TestNew_AppInfoVersionLabel(t *testing.T) {
+	m := New("2.1.0")
+	if got := testutil.ToFloat64(m.AppInfo.WithLabelValues("2.1.0")); got != 1 {
+		t.Fatalf("app_info(version=2.1.0) expected 1, got %v", got)
+	}
+}
+
+func TestObserveTaskRun_IncrementsCounterAndHistogram(t *testing.T) {
+	m := New("test")
+	m.ObserveTaskRun("mysql", "success", 12.5, 1024)
+	m.ObserveTaskRun("mysql", "failed", 3.0, 0)
+	if got := testutil.ToFloat64(m.TaskRunTotal.WithLabelValues("success", "mysql")); got != 1 {
+		t.Fatalf("task_run_total{status=success,task_type=mysql}: expected 1, got %v", got)
+	}
+	if got := testutil.ToFloat64(m.TaskRunTotal.WithLabelValues("failed", "mysql")); got != 1 {
+		t.Fatalf("task_run_total{status=failed,task_type=mysql}: expected 1, got %v", got)
+	}
+	if got := testutil.ToFloat64(m.TaskBytesTotal.WithLabelValues("mysql")); got != 1024 {
+		t.Fatalf("task_bytes_total{task_type=mysql}: expected 1024, got %v", got)
+	}
+}
+
+func TestObserveTaskRun_NilReceiverIsSafe(t *testing.T) {
+	var m *Metrics // nil
+	m.ObserveTaskRun("file", "success", 1, 1)
+	m.ObserveRestore("success")
+	m.ObserveVerify("failed")
+	m.ObserveReplication("success")
+	m.IncTaskRunning()
+	m.DecTaskRunning()
+	m.SetStorageUsed("a", "s3", 1)
+	m.SetNodeOnline("n1", "master", true)
+	m.SetAgentQueue("n1", "agent", 2, 1, 3)
+	m.SetSLABreach(3)
+	m.ResetNodeOnline()
+	m.ResetStorageUsed()
+	m.ResetAgentQueue()
+	// no panic -> pass
+}
+
+func TestHandler_ExposesBackupxMetrics(t *testing.T) {
+	m := New("0.0.0-test")
+	m.ObserveTaskRun("file", "success", 1.0, 2048)
+	m.SetNodeOnline("n1", "master", true)
+	m.SetAgentQueue("edge-a", "agent", 3, 1, 2)
+	m.SetSLABreach(1)
+
+	recorder := httptest.NewRecorder()
+	req := httptest.NewRequest("GET", "/metrics", nil)
+	m.Handler().ServeHTTP(recorder, req)
+
+	body, err := io.ReadAll(recorder.Result().Body)
+	if err != nil {
+		t.Fatalf("read body: %v", err)
+	}
+	content := string(body)
+	for _, keyword := range []string{
+		"backupx_task_run_total",
+		"backupx_task_run_duration_seconds",
+		"backupx_node_online",
+		"backupx_agent_command_queue_depth",
+		"backupx_agent_command_running",
+		"backupx_agent_command_timeout_total",
+		"backupx_sla_breach_tasks",
+		"backupx_app_info",
+	} {
+		if !strings.Contains(content, keyword) {
+			t.Errorf("expected /metrics to contain %q", keyword)
+		}
+	}
+}
--- a/server/internal/model/backup_record.go
+++ b/server/internal/model/backup_record.go
@@ -8,28 +8,47 @@ const (
 	BackupRecordStatusFailed  = "failed"
 )

+const (
+	// BackupKindFull 全量归档；BackupKindDifferential 差异归档；
+	// BackupKindRepository 为可独立恢复的 CDC 内容寻址快照。
+	BackupKindFull         = "full"
+	BackupKindDifferential = "differential"
+	BackupKindRepository   = "repository"
+)
+
 type BackupRecord struct {
-	ID                   uint          `gorm:"primaryKey" json:"id"`
-	TaskID               uint          `gorm:"column:task_id;index;not null" json:"taskId"`
-	Task                 BackupTask    `json:"task,omitempty"`
-	StorageTargetID      uint          `gorm:"column:storage_target_id;index;not null" json:"storageTargetId"`
-	StorageTarget        StorageTarget `json:"storageTarget,omitempty"`
-	// NodeID 执行该次备份的节点（0 = 本机 Master）。用于集群中识别 local_disk 类型
-	// 存储的归属节点，避免 Master 端试图跨节点访问远程 Agent 的本地存储。
-	NodeID               uint          `gorm:"column:node_id;index;default:0" json:"nodeId"`
-	Status               string        `gorm:"size:20;index;not null" json:"status"`
-	FileName             string        `gorm:"column:file_name;size:255" json:"fileName"`
-	FileSize             int64         `gorm:"column:file_size;not null;default:0" json:"fileSize"`
-	Checksum             string        `gorm:"column:checksum;size:64" json:"checksum"`
-	StoragePath          string        `gorm:"column:storage_path;size:500" json:"storagePath"`
-	StorageUploadResults string        `gorm:"column:storage_upload_results;type:text" json:"-"`
-	DurationSeconds      int           `gorm:"column:duration_seconds;not null;default:0" json:"durationSeconds"`
-	ErrorMessage         string        `gorm:"column:error_message;size:2000" json:"errorMessage"`
-	LogContent           string        `gorm:"column:log_content;type:text" json:"logContent"`
-	StartedAt            time.Time     `gorm:"column:started_at;index;not null" json:"startedAt"`
-	CompletedAt          *time.Time    `gorm:"column:completed_at;index" json:"completedAt,omitempty"`
-	CreatedAt            time.Time     `json:"createdAt"`
-	UpdatedAt            time.Time     `json:"updatedAt"`
+	ID              uint          `gorm:"primaryKey" json:"id"`
+	TaskID          uint          `gorm:"column:task_id;index;not null" json:"taskId"`
+	Task            BackupTask    `json:"task,omitempty"`
+	StorageTargetID uint          `gorm:"column:storage_target_id;index;not null" json:"storageTargetId"`
+	StorageTarget   StorageTarget `json:"storageTarget,omitempty"`
+	// NodeID 执行该次备份的节点（0 = 本机 Master）。StorageTransferMode 进一步
+	// 区分远程 Agent 直写与 Master 中转，避免在错误节点访问 local_disk。
+	NodeID      uint   `gorm:"column:node_id;index;default:0" json:"nodeId"`
+	Status      string `gorm:"size:20;index;not null" json:"status"`
+	FileName    string `gorm:"column:file_name;size:255" json:"fileName"`
+	FileSize    int64  `gorm:"column:file_size;not null;default:0" json:"fileSize"`
+	Checksum    string `gorm:"column:checksum;size:64" json:"checksum"`
+	StoragePath string `gorm:"column:storage_path;size:500" json:"storagePath"`
+	// 空值表示旧版 Agent 直写；direct / master_relay 记录新协议的实际数据路径。
+	StorageTransferMode  string `gorm:"column:storage_transfer_mode;size:20" json:"storageTransferMode,omitempty"`
+	StorageUploadResults string `gorm:"column:storage_upload_results;type:text" json:"-"`
+	DurationSeconds      int    `gorm:"column:duration_seconds;not null;default:0" json:"durationSeconds"`
+	// Locked 保留锁定（法律保留）：为 true 时该备份不参与保留期/数量自动清理，
+	// 且禁止手动删除，直到显式解锁。用于保护合规快照、迁移前基线等关键备份。
+	Locked bool `gorm:"column:locked;not null;default:false;index" json:"locked"`
+	// BackupKind 备份类型：full（全量）/ differential（差异）/ repository（CDC 快照）。
+	BackupKind string `gorm:"column:backup_kind;size:16;not null;default:'full';index" json:"backupKind"`
+	// BaseRecordID 差异备份所基于的全量备份记录 ID（全量记录为 0）。
+	BaseRecordID uint `gorm:"column:base_record_id;index;not null;default:0" json:"baseRecordId"`
+	// Manifest 全量备份的条目清单（JSON），供后续差异备份比对；差异记录为空。
+	Manifest     string     `gorm:"column:manifest;type:text" json:"-"`
+	ErrorMessage string     `gorm:"column:error_message;size:2000" json:"errorMessage"`
+	LogContent   string     `gorm:"column:log_content;type:text" json:"logContent"`
+	StartedAt    time.Time  `gorm:"column:started_at;index;not null" json:"startedAt"`
+	CompletedAt  *time.Time `gorm:"column:completed_at;index" json:"completedAt,omitempty"`
+	CreatedAt    time.Time  `json:"createdAt"`
+	UpdatedAt    time.Time  `json:"updatedAt"`
 }

 func (BackupRecord) TableName() string {
--- a/server/internal/model/backup_task.go
+++ b/server/internal/model/backup_task.go
@@ -8,6 +8,15 @@ const (
 	BackupTaskTypeSQLite     = "sqlite"
 	BackupTaskTypePostgreSQL = "postgresql"
 	BackupTaskTypeSAPHANA    = "saphana"
+	BackupTaskTypeMongoDB    = "mongodb"
+)
+
+const (
+	// BackupModeFull 全量模式（默认）；BackupModeDifferential 差异归档；
+	// BackupModeRepository 为 CDC 内容寻址仓库模式（仅文件类型本机任务）。
+	BackupModeFull         = "full"
+	BackupModeDifferential = "differential"
+	BackupModeRepository   = "repository"
 )

 const (
@@ -18,38 +27,54 @@ const (
 )

 type BackupTask struct {
-	ID                   uint            `gorm:"primaryKey" json:"id"`
-	Name                 string          `gorm:"size:100;uniqueIndex;not null" json:"name"`
-	Type                 string          `gorm:"size:20;index;not null" json:"type"`
-	Enabled              bool            `gorm:"not null;default:true" json:"enabled"`
-	CronExpr             string          `gorm:"column:cron_expr;size:64" json:"cronExpr"`
-	SourcePath           string          `gorm:"column:source_path;size:500" json:"sourcePath"`
-	SourcePaths          string          `gorm:"column:source_paths;type:text" json:"sourcePaths"`
-	ExcludePatterns      string          `gorm:"column:exclude_patterns;type:text" json:"excludePatterns"`
-	DBHost               string          `gorm:"column:db_host;size:255" json:"dbHost"`
-	DBPort               int             `gorm:"column:db_port" json:"dbPort"`
-	DBUser               string          `gorm:"column:db_user;size:100" json:"dbUser"`
-	DBPasswordCiphertext string          `gorm:"column:db_password_ciphertext;type:text" json:"-"`
-	DBName               string          `gorm:"column:db_name;size:255" json:"dbName"`
-	DBPath               string          `gorm:"column:db_path;size:500" json:"dbPath"`
+	ID                   uint   `gorm:"primaryKey" json:"id"`
+	Name                 string `gorm:"size:100;uniqueIndex;not null" json:"name"`
+	Type                 string `gorm:"size:20;index;not null" json:"type"`
+	Enabled              bool   `gorm:"not null;default:true" json:"enabled"`
+	CronExpr             string `gorm:"column:cron_expr;size:64" json:"cronExpr"`
+	SourcePath           string `gorm:"column:source_path;size:500" json:"sourcePath"`
+	SourcePaths          string `gorm:"column:source_paths;type:text" json:"sourcePaths"`
+	ExcludePatterns      string `gorm:"column:exclude_patterns;type:text" json:"excludePatterns"`
+	DBHost               string `gorm:"column:db_host;size:255" json:"dbHost"`
+	DBPort               int    `gorm:"column:db_port" json:"dbPort"`
+	DBUser               string `gorm:"column:db_user;size:100" json:"dbUser"`
+	DBPasswordCiphertext string `gorm:"column:db_password_ciphertext;type:text" json:"-"`
+	DBName               string `gorm:"column:db_name;size:255" json:"dbName"`
+	DBPath               string `gorm:"column:db_path;size:500" json:"dbPath"`
 	// ExtraConfig 类型特有的扩展配置（JSON），如 SAP HANA 的 backupLevel / backupChannels 等
-	ExtraConfig string `gorm:"column:extra_config;type:text" json:"extraConfig"`
-	StorageTargetID      uint            `gorm:"column:storage_target_id;index;not null" json:"storageTargetId"`           // deprecated: 保留兼容
-	StorageTarget        StorageTarget   `json:"storageTarget,omitempty"`                                                  // deprecated: 保留兼容
-	StorageTargets       []StorageTarget `gorm:"many2many:backup_task_storage_targets" json:"storageTargets,omitempty"`
-	NodeID               uint            `gorm:"column:node_id;index;default:0" json:"nodeId"`
-	Node                 Node            `json:"node,omitempty"`
-	Tags                 string          `gorm:"column:tags;size:500" json:"tags"`
-	RetentionDays        int             `gorm:"column:retention_days;not null;default:30" json:"retentionDays"`
-	Compression          string          `gorm:"size:10;not null;default:'gzip'" json:"compression"`
-	Encrypt              bool            `gorm:"not null;default:false" json:"encrypt"`
-	MaxBackups           int             `gorm:"column:max_backups;not null;default:10" json:"maxBackups"`
-	LastRunAt            *time.Time      `gorm:"column:last_run_at" json:"lastRunAt,omitempty"`
-	LastStatus           string          `gorm:"column:last_status;size:20;not null;default:'idle'" json:"lastStatus"`
+	ExtraConfig     string          `gorm:"column:extra_config;type:text" json:"extraConfig"`
+	StorageTargetID uint            `gorm:"column:storage_target_id;index;not null" json:"storageTargetId"` // deprecated: 保留兼容
+	StorageTarget   StorageTarget   `json:"storageTarget,omitempty"`                                        // deprecated: 保留兼容
+	StorageTargets  []StorageTarget `gorm:"many2many:backup_task_storage_targets" json:"storageTargets,omitempty"`
+	NodeID          uint            `gorm:"column:node_id;index;default:0" json:"nodeId"`
+	Node            Node            `json:"node,omitempty"`
+	// NodePoolTag 节点池标签（可选）。非空且 NodeID=0 时，调度器会从 Node.Labels 包含该 tag
+	// 的在线节点中动态挑选一台执行（按运行中任务数最少原则），失败会 best-effort 切换到下一个候选。
+	// 典型场景：NodePoolTag="db" 让 MySQL 备份任务在任意标有 "db" 的数据库节点执行。
+	NodePoolTag   string `gorm:"column:node_pool_tag;size:64;index" json:"nodePoolTag"`
+	Tags          string `gorm:"column:tags;size:500" json:"tags"`
+	RetentionDays int    `gorm:"column:retention_days;not null;default:30" json:"retentionDays"`
+	Compression   string `gorm:"size:10;not null;default:'gzip'" json:"compression"`
+	Encrypt       bool   `gorm:"not null;default:false" json:"encrypt"`
+	MaxBackups    int    `gorm:"column:max_backups;not null;default:10" json:"maxBackups"`
+	// BackupMode 备份模式：full（全量，默认）/ differential（差异归档）/
+	// repository（FastCDC 分块、全局去重快照）。后两者仅支持本机文件任务。
+	BackupMode string `gorm:"column:backup_mode;size:16;not null;default:'full'" json:"backupMode"`
+	// DiffFullIntervalDays 差异模式下强制全量的间隔（天）：最近全量超过该天数则本次自动改为全量，
+	// 限制差异链跨度与单个差异体积。默认 7。
+	DiffFullIntervalDays int `gorm:"column:diff_full_interval_days;not null;default:7" json:"diffFullIntervalDays"`
+	// GFS（祖父-父-子）保留：分别保留最近 N 天 / M 周 / K 月 / Y 年的代表性备份（每周期保留最新一份）。
+	// 任一 > 0 即启用 GFS，取代 RetentionDays/MaxBackups 简单策略；全为 0 时维持简单策略（向后兼容）。
+	KeepDaily   int        `gorm:"column:keep_daily;not null;default:0" json:"keepDaily"`
+	KeepWeekly  int        `gorm:"column:keep_weekly;not null;default:0" json:"keepWeekly"`
+	KeepMonthly int        `gorm:"column:keep_monthly;not null;default:0" json:"keepMonthly"`
+	KeepYearly  int        `gorm:"column:keep_yearly;not null;default:0" json:"keepYearly"`
+	LastRunAt   *time.Time `gorm:"column:last_run_at" json:"lastRunAt,omitempty"`
+	LastStatus  string     `gorm:"column:last_status;size:20;not null;default:'idle'" json:"lastStatus"`
 	// 验证（恢复演练）配置 — 定期自动校验备份可恢复性
-	VerifyEnabled   bool   `gorm:"column:verify_enabled;not null;default:false" json:"verifyEnabled"`
-	VerifyCronExpr  string `gorm:"column:verify_cron_expr;size:64" json:"verifyCronExpr"`
-	VerifyMode      string `gorm:"column:verify_mode;size:20;not null;default:'quick'" json:"verifyMode"`
+	VerifyEnabled  bool   `gorm:"column:verify_enabled;not null;default:false" json:"verifyEnabled"`
+	VerifyCronExpr string `gorm:"column:verify_cron_expr;size:64" json:"verifyCronExpr"`
+	VerifyMode     string `gorm:"column:verify_mode;size:20;not null;default:'quick'" json:"verifyMode"`
 	// SLA 配置 — RPO（期望最长未备份间隔）与告警阈值
 	SLAHoursRPO             int `gorm:"column:sla_hours_rpo;not null;default:0" json:"slaHoursRpo"`
 	AlertOnConsecutiveFails int `gorm:"column:alert_on_consecutive_fails;not null;default:1" json:"alertOnConsecutiveFails"`
@@ -64,9 +89,9 @@ type BackupTask struct {
 	// 语义：上游任务成功后自动触发本任务，形成工作流（如 DB 备份完成 → 归档压缩）。
 	// 调度器继续按本任务自己的 cron 触发，仅"自动触发"路径响应依赖完成事件。
 	// 循环依赖检查在 service 层完成，避免配置阶段即出错。
-	DependsOnTaskIDs string `gorm:"column:depends_on_task_ids;size:500" json:"dependsOnTaskIds"`
-	CreatedAt            time.Time       `json:"createdAt"`
-	UpdatedAt            time.Time       `json:"updatedAt"`
+	DependsOnTaskIDs string    `gorm:"column:depends_on_task_ids;size:500" json:"dependsOnTaskIds"`
+	CreatedAt        time.Time `json:"createdAt"`
+	UpdatedAt        time.Time `json:"updatedAt"`
 }

 func (BackupTask) TableName() string {
--- a/server/internal/model/node.go
+++ b/server/internal/model/node.go
@@ -1,36 +1,97 @@
 package model

-import "time"
+import (
+	"strings"
+	"time"
+)

 const (
 	NodeStatusOnline  = "online"
 	NodeStatusOffline = "offline"
 )

+// OfflineGracePeriod 节点心跳超时判定阈值：超过该时长未心跳的远程节点视为离线。
+// Agent 默认 15s 心跳一次，预留 3 次重试空间。
+const OfflineGracePeriod = 45 * time.Second
+
+// EffectiveStatus 返回节点的「实时」在线状态。
+//
+// 存储字段 Status 由心跳置 online、由后台离线监控置 offline，二者之间存在最长一个
+// 监控周期的滞后窗口；期间 List/Get/调度器可能读到过期的 "online"，进而把任务下发
+// 给一台刚刚失联的节点。本方法直接以 LastSeen 推导：远程节点若超过 OfflineGracePeriod
+// 未心跳即视为 offline，消除该滞后导致的误判。本机节点恒以存储状态为准（它就是 Master
+// 自身，不依赖心跳）。
+func (n *Node) EffectiveStatus(now time.Time) string {
+	if n == nil {
+		return NodeStatusOffline
+	}
+	if n.IsLocal {
+		return n.Status
+	}
+	if now.Sub(n.LastSeen) > OfflineGracePeriod {
+		return NodeStatusOffline
+	}
+	return n.Status
+}
+
 // Node represents a managed server node in the cluster.
 // The default "local" node is auto-created for single-machine backward compatibility.
 type Node struct {
-	ID        uint      `gorm:"primaryKey" json:"id"`
-	Name      string    `gorm:"size:128;uniqueIndex;not null" json:"name"`
-	Hostname  string    `gorm:"size:255" json:"hostname"`
-	IPAddress string    `gorm:"column:ip_address;size:64" json:"ipAddress"`
-	Token     string    `gorm:"size:128;uniqueIndex;not null" json:"-"`
-	Status    string    `gorm:"size:20;not null;default:'offline'" json:"status"`
-	IsLocal   bool      `gorm:"not null;default:false" json:"isLocal"`
-	OS        string    `gorm:"size:64" json:"os"`
-	Arch      string    `gorm:"size:32" json:"arch"`
-	AgentVer             string     `gorm:"column:agent_version;size:32" json:"agentVersion"`
-	LastSeen             time.Time  `gorm:"column:last_seen" json:"lastSeen"`
-	PrevToken            string     `gorm:"size:128;index" json:"-"`
-	PrevTokenExpires     *time.Time `gorm:"column:prev_token_expires" json:"-"`
+	ID               uint       `gorm:"primaryKey" json:"id"`
+	Name             string     `gorm:"size:128;uniqueIndex;not null" json:"name"`
+	Hostname         string     `gorm:"size:255" json:"hostname"`
+	IPAddress        string     `gorm:"column:ip_address;size:64" json:"ipAddress"`
+	Token            string     `gorm:"size:128;uniqueIndex;not null" json:"-"`
+	Status           string     `gorm:"size:20;not null;default:'offline'" json:"status"`
+	IsLocal          bool       `gorm:"not null;default:false" json:"isLocal"`
+	OS               string     `gorm:"size:64" json:"os"`
+	Arch             string     `gorm:"size:32" json:"arch"`
+	AgentVer         string     `gorm:"column:agent_version;size:32" json:"agentVersion"`
+	LastSeen         time.Time  `gorm:"column:last_seen" json:"lastSeen"`
+	PrevToken        string     `gorm:"size:128;index" json:"-"`
+	PrevTokenExpires *time.Time `gorm:"column:prev_token_expires" json:"-"`
 	// MaxConcurrent 该节点允许的最大并发任务数（0=不限制，沿用全局 cfg.Backup.MaxConcurrent）。
 	// 用于大集群中限制单节点资源占用：例如小内存 Agent 节点可配 1，避免多个大备份同时跑挤爆。
 	MaxConcurrent int `gorm:"column:max_concurrent;not null;default:0" json:"maxConcurrent"`
 	// BandwidthLimit 该节点上传带宽上限（rclone 可识别格式：10M / 1G / 0=不限）。
 	// 对集群感知的上传场景有效（Master 本地与 Agent 运行时均会应用）。
 	BandwidthLimit string `gorm:"column:bandwidth_limit;size:32" json:"bandwidthLimit"`
-	CreatedAt      time.Time `json:"createdAt"`
-	UpdatedAt      time.Time `json:"updatedAt"`
+	// Labels 节点标签（CSV，如 "prod,db-host,high-mem"）。
+	// 用于任务调度的节点池选择：任务配置 NodePoolTag 时，调度器会从 Labels 包含该 tag 的
+	// 在线节点中自动挑选一台执行（按当前运行中任务数升序）。单节点可属多个池。
+	Labels    string    `gorm:"column:labels;size:500" json:"labels"`
+	CreatedAt time.Time `json:"createdAt"`
+	UpdatedAt time.Time `json:"updatedAt"`
+}
+
+// LabelSet 把 CSV Labels 解析为 set，便于做成员判定。
+// 空白与空 token 自动忽略。
+func (n *Node) LabelSet() map[string]struct{} {
+	if n == nil {
+		return nil
+	}
+	out := make(map[string]struct{})
+	for _, raw := range strings.Split(n.Labels, ",") {
+		label := strings.TrimSpace(raw)
+		if label != "" {
+			out[label] = struct{}{}
+		}
+	}
+	return out
+}
+
+// HasLabel 判断节点是否属于指定池。nil/空 tag 返回 false。
+func (n *Node) HasLabel(tag string) bool {
+	tag = strings.TrimSpace(tag)
+	if n == nil || tag == "" {
+		return false
+	}
+	for _, raw := range strings.Split(n.Labels, ",") {
+		if strings.TrimSpace(raw) == tag {
+			return true
+		}
+	}
+	return false
 }

 func (Node) TableName() string {
--- a/server/internal/model/node_label_test.go
+++ b/server/internal/model/node_label_test.go
@@ -0,0 +1,47 @@
+package model
+
+import "testing"
+
+func TestNodeHasLabel(t *testing.T) {
+	cases := []struct {
+		labels string
+		tag    string
+		want   bool
+	}{
+		{"prod,db,high-mem", "prod", true},
+		{"prod,db,high-mem", "db", true},
+		{"prod,db,high-mem", "backup", false},
+		{"  prod ,  db  ", "db", true}, // trim 空白
+		{"", "prod", false},
+		{"prod", "", false}, // 空 tag 不匹配
+	}
+	for _, c := range cases {
+		n := &Node{Labels: c.labels}
+		if got := n.HasLabel(c.tag); got != c.want {
+			t.Errorf("labels=%q tag=%q want %v got %v", c.labels, c.tag, c.want, got)
+		}
+	}
+}
+
+func TestNodeLabelSet(t *testing.T) {
+	n := &Node{Labels: "prod, db ,,high-mem,prod"}
+	set := n.LabelSet()
+	for _, want := range []string{"prod", "db", "high-mem"} {
+		if _, ok := set[want]; !ok {
+			t.Errorf("expected label %q in set", want)
+		}
+	}
+	if len(set) != 3 {
+		t.Errorf("duplicates not deduped, got %v", set)
+	}
+}
+
+func TestNilNodeHasLabelSafe(t *testing.T) {
+	var n *Node
+	if n.HasLabel("anything") {
+		t.Error("nil node should never match any label")
+	}
+	if s := n.LabelSet(); s != nil {
+		t.Errorf("nil node LabelSet should be nil, got %v", s)
+	}
+}
--- a/server/internal/model/node_status_test.go
+++ b/server/internal/model/node_status_test.go
@@ -0,0 +1,58 @@
+package model
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNodeEffectiveStatus(t *testing.T) {
+	now := time.Date(2026, 5, 26, 12, 0, 0, 0, time.UTC)
+	cases := []struct {
+		name string
+		node *Node
+		want string
+	}{
+		{
+			name: "remote fresh heartbeat → stored online",
+			node: &Node{IsLocal: false, Status: NodeStatusOnline, LastSeen: now.Add(-10 * time.Second)},
+			want: NodeStatusOnline,
+		},
+		{
+			name: "remote stale heartbeat but stored online → derived offline",
+			node: &Node{IsLocal: false, Status: NodeStatusOnline, LastSeen: now.Add(-90 * time.Second)},
+			want: NodeStatusOffline,
+		},
+		{
+			name: "remote just past grace period → offline",
+			node: &Node{IsLocal: false, Status: NodeStatusOnline, LastSeen: now.Add(-(OfflineGracePeriod + time.Second))},
+			want: NodeStatusOffline,
+		},
+		{
+			name: "remote within grace period → online",
+			node: &Node{IsLocal: false, Status: NodeStatusOnline, LastSeen: now.Add(-(OfflineGracePeriod - time.Second))},
+			want: NodeStatusOnline,
+		},
+		{
+			name: "local node ignores LastSeen → stored online",
+			node: &Node{IsLocal: true, Status: NodeStatusOnline, LastSeen: now.Add(-24 * time.Hour)},
+			want: NodeStatusOnline,
+		},
+		{
+			name: "remote stored offline stays offline",
+			node: &Node{IsLocal: false, Status: NodeStatusOffline, LastSeen: now.Add(-5 * time.Second)},
+			want: NodeStatusOffline,
+		},
+		{
+			name: "nil node → offline",
+			node: nil,
+			want: NodeStatusOffline,
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := tc.node.EffectiveStatus(now); got != tc.want {
+				t.Fatalf("EffectiveStatus = %q, want %q", got, tc.want)
+			}
+		})
+	}
+}
--- a/server/internal/model/restore_record.go
+++ b/server/internal/model/restore_record.go
@@ -11,21 +11,23 @@ const (
 )

 type RestoreRecord struct {
-	ID              uint         `gorm:"primaryKey" json:"id"`
-	BackupRecordID  uint         `gorm:"column:backup_record_id;index;not null" json:"backupRecordId"`
-	BackupRecord    BackupRecord `json:"backupRecord,omitempty"`
-	TaskID          uint         `gorm:"column:task_id;index;not null" json:"taskId"`
-	Task            BackupTask   `json:"task,omitempty"`
-	NodeID          uint         `gorm:"column:node_id;index;default:0" json:"nodeId"`
-	Status          string       `gorm:"size:20;index;not null" json:"status"`
-	ErrorMessage    string       `gorm:"column:error_message;size:2000" json:"errorMessage"`
-	LogContent      string       `gorm:"column:log_content;type:text" json:"logContent"`
-	DurationSeconds int          `gorm:"column:duration_seconds;not null;default:0" json:"durationSeconds"`
-	StartedAt       time.Time    `gorm:"column:started_at;index;not null" json:"startedAt"`
-	CompletedAt     *time.Time   `gorm:"column:completed_at;index" json:"completedAt,omitempty"`
-	TriggeredBy     string       `gorm:"column:triggered_by;size:100" json:"triggeredBy"`
-	CreatedAt       time.Time    `json:"createdAt"`
-	UpdatedAt       time.Time    `json:"updatedAt"`
+	ID             uint         `gorm:"primaryKey" json:"id"`
+	BackupRecordID uint         `gorm:"column:backup_record_id;index;not null" json:"backupRecordId"`
+	BackupRecord   BackupRecord `json:"backupRecord,omitempty"`
+	TaskID         uint         `gorm:"column:task_id;index;not null" json:"taskId"`
+	Task           BackupTask   `json:"task,omitempty"`
+	NodeID         uint         `gorm:"column:node_id;index;default:0" json:"nodeId"`
+	// TargetPath 恢复到指定目录（仅文件类型本机恢复）；空 = 恢复到原始源路径。
+	TargetPath      string     `gorm:"column:target_path;size:500" json:"targetPath"`
+	Status          string     `gorm:"size:20;index;not null" json:"status"`
+	ErrorMessage    string     `gorm:"column:error_message;size:2000" json:"errorMessage"`
+	LogContent      string     `gorm:"column:log_content;type:text" json:"logContent"`
+	DurationSeconds int        `gorm:"column:duration_seconds;not null;default:0" json:"durationSeconds"`
+	StartedAt       time.Time  `gorm:"column:started_at;index;not null" json:"startedAt"`
+	CompletedAt     *time.Time `gorm:"column:completed_at;index" json:"completedAt,omitempty"`
+	TriggeredBy     string     `gorm:"column:triggered_by;size:100" json:"triggeredBy"`
+	CreatedAt       time.Time  `json:"createdAt"`
+	UpdatedAt       time.Time  `json:"updatedAt"`
 }

 func (RestoreRecord) TableName() string {
--- a/server/internal/model/user.go
+++ b/server/internal/model/user.go
@@ -22,12 +22,25 @@ func IsValidRole(role string) bool {
 }

 type User struct {
-	ID           uint      `gorm:"primaryKey" json:"id"`
-	Username     string    `gorm:"size:64;uniqueIndex;not null" json:"username"`
-	PasswordHash string    `gorm:"column:password_hash;not null" json:"-"`
-	DisplayName  string    `gorm:"size:128;not null" json:"displayName"`
-	Email        string    `gorm:"size:255" json:"email"`
-	Role         string    `gorm:"size:32;not null;default:admin" json:"role"`
+	ID           uint   `gorm:"primaryKey" json:"id"`
+	Username     string `gorm:"size:64;uniqueIndex;not null" json:"username"`
+	PasswordHash string `gorm:"column:password_hash;not null" json:"-"`
+	DisplayName  string `gorm:"size:128;not null" json:"displayName"`
+	Email        string `gorm:"size:255" json:"email"`
+	Phone        string `gorm:"size:64" json:"phone"`
+	Role         string `gorm:"size:32;not null;default:admin" json:"role"`
+	// TwoFactorSecretCiphertext 保存 TOTP 密钥密文；未启用时可作为待确认密钥。
+	TwoFactorEnabled          bool   `gorm:"column:two_factor_enabled;not null;default:false" json:"twoFactorEnabled"`
+	TwoFactorSecretCiphertext string `gorm:"column:two_factor_secret_ciphertext;type:text" json:"-"`
+	// TwoFactorRecoveryCodeHashes 保存一次性恢复码哈希的 JSON 数组。
+	TwoFactorRecoveryCodeHashes string `gorm:"column:two_factor_recovery_code_hashes;type:text" json:"-"`
+	// WebAuthnCredentials 保存通行密钥公钥元数据 JSON，不包含私钥或明文密钥。
+	WebAuthnCredentials         string `gorm:"column:webauthn_credentials;type:text" json:"-"`
+	WebAuthnChallengeCiphertext string `gorm:"column:webauthn_challenge_ciphertext;type:text" json:"-"`
+	TrustedDevices              string `gorm:"column:trusted_devices;type:text" json:"-"`
+	EmailOTPEnabled             bool   `gorm:"column:email_otp_enabled;not null;default:false" json:"emailOtpEnabled"`
+	SMSOTPEnabled               bool   `gorm:"column:sms_otp_enabled;not null;default:false" json:"smsOtpEnabled"`
+	OutOfBandOTPCiphertext      string `gorm:"column:out_of_band_otp_ciphertext;type:text" json:"-"`
 	// Disabled 禁用账号（不删除保留审计）。禁用后无法登录。
 	Disabled  bool      `gorm:"not null;default:false" json:"disabled"`
 	CreatedAt time.Time `json:"createdAt"`
--- a/server/internal/notify/email.go
+++ b/server/internal/notify/email.go
@@ -37,13 +37,12 @@ func (n *EmailNotifier) Send(_ context.Context, config map[string]any, message M
 	from := strings.TrimSpace(asString(config["from"]))
 	toList := splitCommaValues(asString(config["to"]))
 	address := host + ":" + strconv.Itoa(port)
-	headers := []string{"From: " + from, "To: " + strings.Join(toList, ", "), "Subject: " + message.Title, "MIME-Version: 1.0", "Content-Type: text/plain; charset=UTF-8", "", message.Body}
 	var auth smtp.Auth
 	if username != "" {
 		auth = smtp.PlainAuth("", username, password, host)
 	}

-	rawMessage := []byte(strings.Join(headers, "\r\n"))
+	rawMessage := buildRawMessage(from, toList, message)

 	if port == 465 {
 		tlsConfig := &tls.Config{ServerName: host}
@@ -86,3 +85,31 @@ func (n *EmailNotifier) Send(_ context.Context, config map[string]any, message M

 	return smtp.SendMail(address, auth, from, toList, rawMessage)
 }
+
+// buildRawMessage 构造 RFC 5322 邮件原文。所有头部值都会剔除 CR/LF，
+// 防止 SMTP 头注入：备份任务名等用户可控内容会进入 Subject，若包含
+// 换行符可被用来注入额外头部（如 Bcc）或伪造正文。正文本身不做处理，
+// 允许包含换行。
+func buildRawMessage(from string, toList []string, message Message) []byte {
+	sanitizedTo := make([]string, 0, len(toList))
+	for _, addr := range toList {
+		if s := sanitizeHeaderValue(addr); s != "" {
+			sanitizedTo = append(sanitizedTo, s)
+		}
+	}
+	headers := []string{
+		"From: " + sanitizeHeaderValue(from),
+		"To: " + strings.Join(sanitizedTo, ", "),
+		"Subject: " + sanitizeHeaderValue(message.Title),
+		"MIME-Version: 1.0",
+		"Content-Type: text/plain; charset=UTF-8",
+		"",
+		message.Body,
+	}
+	return []byte(strings.Join(headers, "\r\n"))
+}
+
+// sanitizeHeaderValue 移除头部值中的 CR 与 LF，消除头注入向量。
+func sanitizeHeaderValue(value string) string {
+	return strings.NewReplacer("\r", "", "\n", "").Replace(strings.TrimSpace(value))
+}
--- a/Show More
+++ b/Show More