feat(client): 用户管理页 + E2E 门禁（E15/E16/E18）

- 新增系统用户管理页（创建/禁用启用/重置密码/角色）

- 引入 Playwright E2E：覆盖登录-报销-待办-票据-OCR-支付-登出

- 新增 ci-e2e 工作流（PR + nightly）

client/package.json

@@ -7,6 +7,7 @@
     "dev": "vite",
     "build": "npm run typecheck && vite build",
     "typecheck": "tsc --noEmit",
+    "test:e2e": "playwright test",
     "preview": "vite preview"
   },
   "dependencies": {
@@ -23,6 +24,7 @@
     "tailwind-merge": "^2.6.1"
   },
   "devDependencies": {
+    "@playwright/test": "^1.50.0",
     "@types/react": "^18.2.55",
     "@types/react-dom": "^18.2.19",
     "@vitejs/plugin-react": "^4.2.1",