feat: 实现微信小程序后端接口与用户认证系统

新增微信登录/注册合一接口、资料完善接口和token刷新接口
重构用户服务层，支持自动维护用户类型和资料完整度
引入JWT认证中间件和请求验证中间件
更新文档与测试用例，支持dist构建部署

back-end/dist/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "web-bai-manage-api-server",
+  "version": "1.0.0",
+  "description": "Backend API server for BAI Management System",
+  "main": "dist/src/index.js",
+  "scripts": {
+    "dev": "node src/index.js",
+    "build": "node scripts/build.js",
+    "start": "node dist/src/index.js",
+    "prestart": "node -e \"require('fs').accessSync('dist/src/index.js')\"",
+    "test": "node --test tests/**/*.test.js",
+    "lint": "eslint src tests --ext .js",
+    "spec:lint": "npx @fission-ai/openspec lint spec/",
+    "spec:validate": "npx @fission-ai/openspec validate spec/"
+  },
+  "dependencies": {
+    "axios": "^1.13.2",
+    "express": "^4.18.2",
+    "dotenv": "^16.3.1",
+    "jsonwebtoken": "^9.0.2"
+  },
+  "devDependencies": {
+    "@fission-ai/openspec": "^1.0.0",
+    "eslint": "^9.23.0",
+    "supertest": "^7.1.1"
+  },
+  "engines": {
+    "node": ">=22.0.0"
+  },
+  "author": "",
+  "license": "ISC"
+}