feat: add admin UI frontend and complete backend APIs

- Add Vue 3 frontend with Element Plus
- Implement login, dashboard, tenant management
- Add app configuration, logs viewer, stats pages
- Add user management for admins
- Update Drone CI to build and deploy frontend
- Frontend ports: 3001 (test), 4001 (prod)

.drone.yml

@@ -10,6 +10,7 @@ trigger:
     - push
 
 steps:
+  # 构建后端镜像
   - name: build-backend
     image: docker:dind
     volumes:
@@ -19,6 +20,17 @@ steps:
       - docker build -t platform-backend:${DRONE_COMMIT_SHA:0:8} -f deploy/Dockerfile.backend .
       - docker tag platform-backend:${DRONE_COMMIT_SHA:0:8} platform-backend:latest
 
+  # 构建前端镜像
+  - name: build-frontend
+    image: docker:dind
+    volumes:
+      - name: docker-sock
+        path: /var/run/docker.sock
+    commands:
+      - docker build -t platform-frontend:${DRONE_COMMIT_SHA:0:8} -f deploy/Dockerfile.frontend .
+      - docker tag platform-frontend:${DRONE_COMMIT_SHA:0:8} platform-frontend:latest
+
+  # 部署测试环境
   - name: deploy-test
     image: docker:dind
     volumes:
@@ -34,13 +46,15 @@ steps:
       CONFIG_ENCRYPT_KEY:
         from_secret: config_encrypt_key
     commands:
-      - docker stop platform-backend-test || true
-      - docker rm platform-backend-test || true
+      - docker stop platform-backend-test platform-frontend-test || true
+      - docker rm platform-backend-test platform-frontend-test || true
       - docker run -d --name platform-backend-test -p 8001:8000 --restart unless-stopped -e DATABASE_URL=$DATABASE_URL -e API_KEY=$API_KEY -e JWT_SECRET=$JWT_SECRET -e CONFIG_ENCRYPT_KEY=$CONFIG_ENCRYPT_KEY platform-backend:latest
+      - docker run -d --name platform-frontend-test -p 3001:80 --restart unless-stopped platform-frontend:latest
     when:
       branch:
         - develop
 
+  # 部署生产环境
   - name: deploy-prod
     image: docker:dind
     volumes:
@@ -56,9 +70,10 @@ steps:
       CONFIG_ENCRYPT_KEY:
         from_secret: config_encrypt_key
     commands:
-      - docker stop platform-backend-prod || true
-      - docker rm platform-backend-prod || true
+      - docker stop platform-backend-prod platform-frontend-prod || true
+      - docker rm platform-backend-prod platform-frontend-prod || true
       - docker run -d --name platform-backend-prod -p 9001:8000 --restart unless-stopped -e DATABASE_URL=$DATABASE_URL -e API_KEY=$API_KEY -e JWT_SECRET=$JWT_SECRET -e CONFIG_ENCRYPT_KEY=$CONFIG_ENCRYPT_KEY platform-backend:latest
+      - docker run -d --name platform-frontend-prod -p 4001:80 --restart unless-stopped platform-frontend:latest
     when:
       branch:
         - main