chore: Docker 双服务 + Makefile/build.ps1 双进程目标 + README 架构更新

- Dockerfile 改为 Node 24 运行时：Vike 产物 + Go API 二进制共用镜像
- docker-compose 双容器：web(:3000 对外 SSR) + api(:3001 内部，持 /data 卷)
- entrypoint 改用 gosu 降权（Debian 基础镜像），健康检查用 node fetch
- Makefile/build.ps1：build 不再打包前端，新增 serve（本地双进程）与 web-build
- README 同步双服务架构、端口/环境变量、部署与开发说明

build.ps1

@@ -3,7 +3,7 @@
 #        .\build.ps1 -Target build-windows
 
 param(
-    [ValidateSet('build', 'build-windows', 'build-linux', 'build-darwin', 'build-all', 'frontend', 'tidy', 'run', 'dev', 'clean', 'docker', 'compose-up', 'compose-down', 'help')]
+    [ValidateSet('build', 'web-build', 'frontend', 'build-windows', 'build-linux', 'build-darwin', 'build-all', 'tidy', 'run', 'serve', 'dev', 'clean', 'docker', 'compose-up', 'compose-down', 'help')]
     [string]$Target = 'build'
 )
 
@@ -23,7 +23,7 @@ function Ensure-Dir($path) {
 }
 
 function Build-Frontend {
-    Write-Host '[frontend] npm run build...' -ForegroundColor Cyan
+    Write-Host '[frontend] npm run build (Vike: client + server)...' -ForegroundColor Cyan
     Push-Location frontend
     try {
         if (-not (Test-Path node_modules)) {
@@ -69,13 +69,14 @@ function Build-Go([string]$OutFile, [string]$GoOS = '', [string]$GoArch = '') {
 
 switch ($Target) {
     'help' {
-        Write-Host '.\build.ps1                  build current platform'
-        Write-Host '.\build.ps1 -Target frontend  frontend only'
+        Write-Host '.\build.ps1                  build Go API binary (current platform)'
+        Write-Host '.\build.ps1 -Target web-build  build frontend (Vike client + server)'
+        Write-Host '.\build.ps1 -Target serve    production run: Node :3000 + Go API :3001'
         Write-Host '.\build.ps1 -Target build-windows'
         Write-Host '.\build.ps1 -Target build-linux'
         Write-Host '.\build.ps1 -Target build-all'
-        Write-Host '.\build.ps1 -Target run       backend only (port 3000)'
-        Write-Host '.\build.ps1 -Target dev       backend + Vite HMR (recommended for frontend dev)'
+        Write-Host '.\build.ps1 -Target run      Go API only (port 3000, no pages)'
+        Write-Host '.\build.ps1 -Target dev      Vike HMR :5173 + Go API :3000 (recommended for frontend dev)'
         Write-Host '.\build.ps1 -Target tidy'
         Write-Host '.\build.ps1 -Target clean'
         Write-Host '.\build.ps1 -Target docker       build Docker image'
@@ -84,6 +85,7 @@ switch ($Target) {
         Write-Host ''
         Write-Host 'Note: Windows "make" is often Embarcadero MAKE, not GNU Make.'
     }
+    'web-build' { Build-Frontend }
     'frontend' { Build-Frontend }
     'tidy' { go mod tidy }
     'clean' {
@@ -94,11 +96,35 @@ switch ($Target) {
         Ensure-Dir $DevDataDir
         go run $MainPkg --data $DevDataDir
     }
+    'serve' {
+        Build-Frontend
+        Build-Go -OutFile $AppName
+        Ensure-Dir $DevDataDir
+        $root = (Get-Location).Path
+        $goExe = Join-Path $root "$BuildDir\$AppName.exe"
+        Write-Host '[serve] 正在新窗口启动 Go API (:3001)...' -ForegroundColor Cyan
+        Start-Process powershell -ArgumentList @(
+            '-NoExit', '-Command',
+            "Set-Location '$root'; & '$goExe' --data '$DevDataDir' --port 3001"
+        ) | Out-Null
+        Start-Sleep -Seconds 2
+        Write-Host '[serve] 启动 Node 渲染服务器 (:3000)...' -ForegroundColor Cyan
+        Push-Location frontend
+        try {
+            $env:PORT = '3000'
+            $env:GO_API_URL = 'http://127.0.0.1:3001'
+            npm start
+        } finally {
+            Remove-Item Env:PORT -ErrorAction SilentlyContinue
+            Remove-Item Env:GO_API_URL -ErrorAction SilentlyContinue
+            Pop-Location
+        }
+    }
     'dev' {
         $root = (Get-Location).Path
         Ensure-Dir $DevDataDir
         Write-Host ''
-        Write-Host '[dev] 前端开发  : http://localhost:5173  (Vite HMR)' -ForegroundColor Green
+        Write-Host '[dev] 前端开发  : http://localhost:5173  (Vike HMR)' -ForegroundColor Green
         Write-Host '[dev] 后端 API  : http://localhost:3000  (Go)' -ForegroundColor Green
         Write-Host "[dev] 数据目录  : $DevDataDir (与 dist 二进制一致)" -ForegroundColor Green
         Write-Host '[dev] 提示     : 请访问 5173 端口，Vite 会自动代理 API 到 3000' -ForegroundColor Yellow
@@ -117,24 +143,18 @@ switch ($Target) {
         }
     }
     'build' {
-        Build-Frontend
         Build-Go -OutFile $AppName
     }
     'build-windows' {
-        Build-Frontend
         Build-Go -OutFile $AppName -GoOS 'windows' -GoArch 'amd64'
     }
     'build-linux' {
-        Write-Host '[build-linux] will npm run build then go:embed SPA' -ForegroundColor Yellow
-        Build-Frontend
         Build-Go -OutFile "$AppName-linux-amd64" -GoOS 'linux' -GoArch 'amd64'
     }
     'build-darwin' {
-        Build-Frontend
         Build-Go -OutFile "$AppName-darwin-arm64" -GoOS 'darwin' -GoArch 'arm64'
     }
     'build-all' {
-        Build-Frontend
         Build-Go -OutFile $AppName -GoOS 'windows' -GoArch 'amd64'
         Build-Go -OutFile "$AppName-linux-amd64" -GoOS 'linux' -GoArch 'amd64'
         Build-Go -OutFile "$AppName-darwin-arm64" -GoOS 'darwin' -GoArch 'arm64'