feat(deploy): M11 单二进制装配（cmd/cyrene 全链路 wire + go:embed 前端 + 外置 dist 覆盖 + 优雅关闭 + SPA 静态服务）；前端 build 拷到 internal/webui/dist

frontend/web/package.json

@@ -6,7 +6,7 @@
   "description": "Cyrene v2 user frontend (M9 modal UI) — Miuix design language",
   "scripts": {
     "dev": "vite",
-    "build": "tsc --noEmit && vite build",
+    "build": "tsc --noEmit && vite build && node copy-dist.mjs",
     "preview": "vite preview",
     "typecheck": "tsc --noEmit"
   },