refactor: unify music subscription data port

app/chain/_music.py

@@ -9,7 +9,7 @@ from app.application.subscription.contract import (
 from app.chain.download import DownloadChain
 from app.chain.media import MediaChain
 from app.chain.search import SearchChain
-from app.application.chain.data import SubscribePortProxy as SubscribeOper
+from app.application.chain.data import get_chain_subscribe_port
 from app.application.configuration import get_configured_system_config
 from app.domain.context import Context, MediaInfo, MusicInfo
 from app.domain.media import MUSIC_SUBSCRIBABLE_TYPES
@@ -197,7 +197,7 @@ class MusicSubscribeMixin:
             update_data["total_tracks"] = total_tracks
         if not update_data:
             return
-        SubscribeOper().update(subscribe.id, update_data)
+        get_chain_subscribe_port().update(subscribe.id, update_data)
         for key, value in update_data.items():
             setattr(subscribe, key, value)
 
@@ -348,10 +348,10 @@ class MusicSubscribeMixin:
                 "current_bit_depth": best_meta.bit_depth,
                 "current_sample_rate": best_meta.sample_rate,
             }
-            SubscribeOper().update(subscribe.id, quality_data)
+            get_chain_subscribe_port().update(subscribe.id, quality_data)
             for key, value in quality_data.items():
                 setattr(subscribe, key, value)
-        current_subscribe = SubscribeOper().get(subscribe.id)
+        current_subscribe = get_chain_subscribe_port().get(subscribe.id)
         if current_subscribe:
             self.finish_subscribe_or_not(
                 subscribe=current_subscribe,

docs/refactor/backend-architecture-next-stage.md

@@ -6,7 +6,7 @@
 > 审计范围：宿主后端；排除 `app/plugins/**` 运行时插件副本
 > 规范优先级：`AGENTS.md` 与 `docs/rules/` 高于本文
 > 相关文档：`docs/architecture-overview.md`、`docs/refactor/backend-architecture-governance.md`、`docs/refactor/backend-module-refactor-compatibility.md`
-> 实施进度：阶段 0～6 的宿主架构能力已完成收口；API/Application 公共复杂度基线已清零，启动组合根的 SystemConfigOper 构造点已由 14 降至 1；API 进程内后台任务已完成首批统一登记，插件仓适配和 Outbox 外围扩展仍按风险切片推进。Model/Base 查询与写装饰器、legacy 隐式会话外壳均已清零，插件 SDK 也不再导出宿主 Model。2026-08-23 的长期整改阶段 0 已恢复宿主、启动性能、官方插件和 SDK 契约门禁的可信基线；阶段 1a 已补齐 TaskRegistry owner 零债务门禁和诚实的关停超时语义；阶段 1b1 已收口整理 worker、pending 回放、失败通知、进程内 AI 重试、插件监控与事件投递的生命周期所有权；2026-08-24 的阶段 2 已将 212 个已观察宿主模块方法的 legacy aggregation 清零，并补齐可执行 fanout 与下载器文件 DTO 边界；阶段 3 已将消息交互和远程命令的订阅删除统一到 Application/UoW/outbox，宿主不再调用裸线程统计入口；阶段 4 已统一七种消息渠道的宿主回环与后台执行边界；阶段 5 已补齐事件窗口聚合任务的生命周期所有权；阶段 6 已统一插件文件操作的取消完成语义；阶段 7 已统一插件协程补偿的终态等待；阶段 8 已统一宿主同步函数的异步线程池入口；阶段 9 已统一工作流运行时的宿主获取路径；阶段 10 已统一模块、插件与调度运行时的显式 getter 调用；阶段 11 已清除系统配置 getter 的 Oper 形别名；阶段 12 已完成工作流域的显式 Chain 数据端口迁移；阶段 13 已收口用户、交互与消息链的数据端口。
+> 实施进度：阶段 0～6 的宿主架构能力已完成收口；API/Application 公共复杂度基线已清零，启动组合根的 SystemConfigOper 构造点已由 14 降至 1；API 进程内后台任务已完成首批统一登记，插件仓适配和 Outbox 外围扩展仍按风险切片推进。Model/Base 查询与写装饰器、legacy 隐式会话外壳均已清零，插件 SDK 也不再导出宿主 Model。2026-08-23 的长期整改阶段 0 已恢复宿主、启动性能、官方插件和 SDK 契约门禁的可信基线；阶段 1a 已补齐 TaskRegistry owner 零债务门禁和诚实的关停超时语义；阶段 1b1 已收口整理 worker、pending 回放、失败通知、进程内 AI 重试、插件监控与事件投递的生命周期所有权；2026-08-24 的阶段 2 已将 212 个已观察宿主模块方法的 legacy aggregation 清零，并补齐可执行 fanout 与下载器文件 DTO 边界；阶段 3 已将消息交互和远程命令的订阅删除统一到 Application/UoW/outbox，宿主不再调用裸线程统计入口；阶段 4 已统一七种消息渠道的宿主回环与后台执行边界；阶段 5 已补齐事件窗口聚合任务的生命周期所有权；阶段 6 已统一插件文件操作的取消完成语义；阶段 7 已统一插件协程补偿的终态等待；阶段 8 已统一宿主同步函数的异步线程池入口；阶段 9 已统一工作流运行时的宿主获取路径；阶段 10 已统一模块、插件与调度运行时的显式 getter 调用；阶段 11 已清除系统配置 getter 的 Oper 形别名；阶段 12 已完成工作流域的显式 Chain 数据端口迁移；阶段 13 已收口用户、交互与消息链的数据端口；阶段 14 已收口音乐订阅数据端口。
 
 ## 当前复核结论（2026-08-24）
 
@@ -160,6 +160,15 @@
 - 兼容边界不变：数据库 `UserOper`、`UserPortProxy`、User/Interaction/Message Chain 公开方法、消息渠道
   payload 和插件调用方式均未改动。
 
+### 长期整改阶段 14：音乐订阅 Chain 数据端口收口（2026-08-24）
+
+- 音乐订阅辅助链原先通过 `SubscribePortProxy as SubscribeOper` 更新音乐元数据、质量和当前订阅；现在
+  统一调用 `get_chain_subscribe_port()`，测试改为替换同一个命名 getter。
+- 架构门禁单独覆盖 `_music.py`，禁止重新引入 `SubscribePortProxy`。主订阅 Chain 仍有更多数据端口和
+  事务/副作用耦合，继续作为独立高风险阶段处理。
+- 兼容边界不变：音乐订阅公开方法、数据库 `SubscribeOper`、`SubscribePortProxy`、字段写入与插件调用
+  合同均未修改。
+
 ### 总体判断
 
 当前架构总体合理，已经从跨层混合的遗留单体收敛为**边界清晰的模块化单体**：

docs/rules/05-architecture.md

@@ -131,11 +131,11 @@ Session. `app/db/adapters/` is the concrete persistence-adapter layer: it may
 depend on Application-owned Protocols, UoW/Session and Oper implementations.
 This deliberate dependency inversion is the only `DB implementation ->
 Application contract` direction; Application must remain free of DB imports.
-Migrated workflow, user, interaction and messaging Chain consumers use the named
-`get_chain_*_port()` functions from `app/application/chain/data.py`; they must not
-alias migration-time `*PortProxy` classes back to database Oper names. Those
-proxy classes remain compatibility boundaries while the other established Chain
-domains migrate independently.
+Migrated workflow, user, interaction, messaging and music Chain consumers use
+the named `get_chain_*_port()` functions from `app/application/chain/data.py`;
+they must not alias migration-time `*PortProxy` classes back to database Oper
+names. Those proxy classes remain compatibility boundaries while the other
+established Chain domains migrate independently.
 
 ### Adapter boundaries
 

tests/test_architecture_dependencies.py

@@ -452,6 +452,21 @@ def test_user_and_messaging_chains_use_explicit_data_port_getters():
     assert violations == []
 
 
+def test_music_chain_uses_explicit_subscribe_data_port_getter():
+    """音乐订阅链不得把 SubscribePortProxy 伪装成 SubscribeOper。"""
+    path = APP_ROOT / "chain" / "_music.py"
+    tree = ast.parse(path.read_text(encoding="utf-8-sig"), filename=str(path))
+    violations = [
+        f"{path.relative_to(PROJECT_ROOT).as_posix()}:{node.lineno}"
+        for node in ast.walk(tree)
+        if isinstance(node, ast.ImportFrom)
+        and node.module == "app.application.chain.data"
+        and any(alias.name == "SubscribePortProxy" for alias in node.names)
+    ]
+
+    assert violations == []
+
+
 def test_plugin_components_do_not_reexport_legacy_abi_names():
     """新插件组件只提供 canonical 能力，不得复制旧 Helper、Manager 或 Oper 导出。"""
     violations: list[str] = []

tests/test_music_subscribe.py

@@ -134,7 +134,7 @@ def test_music_subscribe_reuses_search_download_and_finish_flow():
     with patch.object(SubscribeChain, "_recognize_music_subscribe", return_value=target), \
             patch("app.chain._music.SearchChain", return_value=search_chain), \
             patch("app.chain._music.DownloadChain", return_value=download_chain), \
-            patch("app.chain._music.SubscribeOper") as subscribe_oper:
+            patch("app.chain._music.get_chain_subscribe_port") as subscribe_oper:
         subscribe_oper.return_value.get.return_value = subscribe
         chain._search_music_subscribe(subscribe)
 
@@ -240,7 +240,7 @@ def test_music_best_version_persists_downloaded_rule_priority():
     chain.finish_subscribe_or_not = Mock()
 
     with patch("app.chain._music.DownloadChain", return_value=download_chain), \
-            patch("app.chain._music.SubscribeOper", return_value=subscribe_oper):
+            patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper):
         chain._download_music_subscribe(subscribe, _music_info(), [downloaded])
 
     subscribe_oper.update.assert_called_once_with(
@@ -441,7 +441,7 @@ def test_music_rss_match_reuses_cached_context_without_second_site_search():
     torrent_helper.filter_torrent.return_value = True
     with patch.object(SubscribeChain, "_recognize_music_subscribe", return_value=target), \
             patch("app.chain.subscribe.SubscribeOper", return_value=subscribe_oper), \
-            patch("app.chain._music.SubscribeOper", return_value=subscribe_oper), \
+            patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper), \
             patch("app.chain._music.TorrentHelper", return_value=torrent_helper), \
             patch("app.chain._music.DownloadChain", return_value=download_chain), \
             patch("app.chain.subscribe.SearchChain") as search_chain, \
@@ -638,7 +638,7 @@ def test_recording_target_sync_clears_stale_album_track_count():
     subscribe = _subscribe(total_tracks=11)
     subscribe_oper = Mock()
 
-    with patch("app.chain._music.SubscribeOper", return_value=subscribe_oper):
+    with patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper):
         SubscribeChain._sync_music_subscribe_target(subscribe, _music_info())
 
     subscribe_oper.update.assert_called_once_with(subscribe.id, {"total_tracks": None})