补回 swagger（Swashbuckle 6.6.2 + XML 注释）、socket.html 入库、固化本机构建与服务器替换脚本

- Directory.Build.props: 生成 XML 注释供 Swagger 展示中文说明
- AdminHost/FishGameHost: 接入 Swashbuckle，路由 adminswagger / roomswagger
- 后台前端 config.js 改为同源相对地址，适配反向代理
- socket.html（SignalR 协议文档）纳入仓库
- deploy/: 本机构建（容器内编译，规避杀软）、服务器替换脚本、Nginx 配置

deploy/build-middleware.ps1

@@ -0,0 +1,70 @@
+<#
+  本机拉取中间件镜像并导出 tar
+  ------------------------------------------------------------------
+  适用场景：服务器访问不了 docker.io（拉 mongo/redis/postgres/rabbitmq 报
+            "error from registry: unknown error"），改为在本机拉好后传过去。
+
+  用法：
+    powershell -ExecutionPolicy Bypass -File deploy\build-middleware.ps1
+  产物：
+    deploy\dist\middleware.tar
+
+  随后在服务器执行：
+    docker load -i middleware.tar
+    docker compose -f deploy/docker-compose.yml up -d
+#>
+param(
+    [string]$OutFile = "",
+    [string[]]$Images = @("redis:7", "mongo:6.0", "postgres:16", "rabbitmq:3.13-management")
+)
+
+$ErrorActionPreference = "Stop"
+$Root = Split-Path -Parent $PSScriptRoot
+$Dist = Join-Path $Root "deploy\dist"
+if (-not $OutFile) { $OutFile = Join-Path $Dist "middleware.tar" }
+
+$mirrors = @("docker.m.daocloud.io", "docker.1ms.run", "docker.xuanyuan.me", "hub.rat.dev")
+
+function Info($m) { Write-Host "[中间件] $m" -ForegroundColor Green }
+
+function Invoke-Quiet([scriptblock]$sb) {
+    $prev = $ErrorActionPreference
+    $ErrorActionPreference = "Continue"
+    & $sb 2>&1 | Out-Null
+    $code = $LASTEXITCODE
+    $ErrorActionPreference = $prev
+    return $code
+}
+
+# ---------- 引擎检查 ----------
+if (-not (Get-Command docker -ErrorAction SilentlyContinue)) { throw "未找到 docker，请先安装并启动 Docker Desktop" }
+if ((Invoke-Quiet { docker info }) -ne 0) { throw "Docker 引擎未就绪，请先启动 Docker Desktop 并等托盘图标变绿" }
+
+# ---------- 拉取镜像（逐个镜像站回退）----------
+foreach ($img in $Images) {
+    if ((Invoke-Quiet { docker image inspect $img }) -eq 0) { Info "已存在，跳过: $img"; continue }
+
+    $done = $false
+    foreach ($m in $mirrors) {
+        Info "拉取 $img （经 $m）..."
+        if ((Invoke-Quiet { docker pull "$m/library/$img" }) -eq 0) {
+            Invoke-Quiet { docker tag "$m/library/$img" $img } | Out-Null
+            Info "OK: $img  <=  $m"
+            $done = $true
+            break
+        }
+    }
+    if (-not $done) { throw "镜像 $img 在所有镜像站都拉取失败，请稍后重试" }
+}
+
+# ---------- 导出 tar ----------
+New-Item -ItemType Directory -Force -Path (Split-Path $OutFile) | Out-Null
+Info "导出到 $OutFile （体积较大，稍候）..."
+if ((Invoke-Quiet { docker save -o $OutFile @Images }) -ne 0) { throw "导出镜像失败" }
+$mb = [math]::Round((Get-Item $OutFile).Length / 1MB, 1)
+
+Info "完成！$OutFile （$mb MB）"
+Write-Host "下一步 —— 本机上传：" -ForegroundColor Cyan
+Write-Host "  scp `"$OutFile`" root@<服务器IP>:/opt/buyu/" -ForegroundColor Cyan
+Write-Host "服务器执行：" -ForegroundColor Cyan
+Write-Host "  cd /opt/buyu && docker load -i middleware.tar && docker compose -f deploy/docker-compose.yml up -d" -ForegroundColor Cyan