test(e2e): 前后台联调 Playwright 与 admin 冒烟

新增 e2e-live 真 API 一致性全路径，并为 admin-h5 增加 mock 浏览器冒烟。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin-h5/package.json

@@ -8,7 +8,8 @@
     "dev": "vite",
     "build": "vue-tsc --noEmit && vite build",
     "typecheck": "vue-tsc --noEmit",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test:e2e": "playwright test"
   },
   "dependencies": {
     "pinia": "^2.3.0",
@@ -16,6 +17,7 @@
     "vue-router": "^4.5.0"
   },
   "devDependencies": {
+    "@playwright/test": "^1.50.1",
     "@vitejs/plugin-vue": "^5.2.1",
     "typescript": "~5.7.2",
     "vite": "^6.0.7",