chore: 初始化 monorepo 脚手架与代码骨架

- Bun workspaces：apps/web（Vue 3.5 + Vite 8 + naive-ui）· apps/server（Hono 4.13 + Drizzle）· packages/shared（契约类型）
- 代码骨架：四表 Drizzle schema · 11 个端点占位（501）· 管理面口令中间件 · 同步引擎占位（5 分钟 tick + 防重入）
- 命令链：dev / build / test / lint / type-check / db:*（见 AGENTS.md）

apps/server/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "@naku/server",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "bun run --hot src/index.ts",
+    "start": "bun run src/index.ts",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "drizzle-kit migrate",
+    "db:push": "drizzle-kit push"
+  },
+  "dependencies": {
+    "@naku/shared": "workspace:*",
+    "drizzle-orm": "^0.45.2",
+    "hono": "^4.13.7",
+    "zod": "^4.6.5"
+  },
+  "devDependencies": {
+    "@types/bun": "latest",
+    "drizzle-kit": "^0.31.10"
+  }
+}