feat: 支付闭环 + 运营助手 Tool Calling + 管理后台完善

- 支付系统：微信支付 mock 自动完成、NATIVE 扫码支付、JSAPI 集成
- 运营助手：Tool Calling 架构，19 个可执行工具，AI 驱动操作
- 角色管理：表格布局 + Dialog 表单 + 权限勾选
- 配置统一：config.ts 单一数据源
- API 审计：补齐 status toggle / comments 端点
- 暗黑模式硬件编码颜色全部替换为 CSS 变量

frontend/package.json

@@ -48,6 +48,7 @@
     "next": "^14.2.35",
     "next-themes": "^0.4.6",
     "postcss": "^8.5.14",
+    "qrcode": "^1.5.4",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "recharts": "^3.8.1",
@@ -60,6 +61,7 @@
     "@playwright/test": "^1.60.0",
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
+    "@types/qrcode": "^1.5.6",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^6.0.1",