feat(ECR-006): 落地运营后台 Phase A（admin API + admin-h5）

新增独立鉴权的 /api/v1/admin 与 Vue 控制台；会员授予与审计同事务，并补集成/单测。

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

package.json

@@ -9,6 +9,8 @@
   "scripts": {
     "dev:h5": "npm run dev -w @yuxingu/user-h5",
     "build:h5": "npm run build -w @yuxingu/user-h5",
+    "dev:admin": "npm run dev -w @yuxingu/admin-h5",
+    "build:admin": "npm run build -w @yuxingu/admin-h5",
     "dev:api": "cd apps/api && go run ./cmd/server",
     "deps:up": "docker compose -f docker-compose.dev.yml up -d",
     "deps:down": "docker compose -f docker-compose.dev.yml down",