🐛 fix(ci): 修复 Docker 镜像构建基础环境

- 将 mcp-server 构建镜像升级到 Go 1.25，匹配当前 go.mod 版本要求\n- 调整 build-env 的 Node 资产复制方式，避免覆盖 Go 工具链\n- 显式补齐 /usr/local/go/bin 到 PATH，修复 smoke test 中 go 不可用\n

Dockerfile.build-env

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.7
 
-ARG GO_IMAGE=golang:1.24-bookworm
+ARG GO_IMAGE=golang:1.25-bookworm
 ARG NODE_IMAGE=node:20-bookworm
 
 FROM ${NODE_IMAGE} AS node
@@ -11,9 +11,15 @@ ARG WEBKIT_API=4.0
 ARG WAILS_VERSION=v2.11.0
 
 ENV DEBIAN_FRONTEND=noninteractive
-ENV PATH=/root/go/bin:${PATH}
+ENV PATH=/root/go/bin:/usr/local/go/bin:${PATH}
 
-COPY --from=node /usr/local/ /usr/local/
+# Copy only Node.js runtime assets so the Go toolchain from the base image
+# stays intact for smoke tests and interactive build shells.
+COPY --from=node /usr/local/bin/node /usr/local/bin/node
+COPY --from=node /usr/local/bin/npm /usr/local/bin/npm
+COPY --from=node /usr/local/bin/npx /usr/local/bin/npx
+COPY --from=node /usr/local/bin/corepack /usr/local/bin/corepack
+COPY --from=node /usr/local/lib/node_modules /usr/local/lib/node_modules
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \

Dockerfile.mcp-server

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.7
 
-FROM --platform=$BUILDPLATFORM golang:1.24-bookworm AS builder
+FROM --platform=$BUILDPLATFORM golang:1.25-bookworm AS builder
 
 ARG TARGETOS=linux
 ARG TARGETARCH=amd64