feat: 班级小助手 阶段1-3（monorepo + 后端 REST/Socket.IO + Web 管理端）

packages/shared/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "@classhelper/shared",
+  "version": "0.1.0",
+  "private": true,
+  "description": "班级小助手 - 三端共享的类型、常量与工具函数",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "dev": "tsc -p tsconfig.json --watch --preserveWatchOutput",
+    "typecheck": "tsc -p tsconfig.json --noEmit",
+    "clean": "node -e \"require('node:fs').rmSync('dist',{recursive:true,force:true})\""
+  },
+  "devDependencies": {
+    "typescript": "~5.9.3"
+  }
+}