ci: 合并 workflow，仅保留 push main 时自动部署

.gitea/workflows/deploy.yml

@@ -3,31 +3,9 @@ name: Deploy
 on:
   push:
     branches: [main]
-  pull_request:
-    branches: [main]
 
 jobs:
-  # ---- PR 时：验证 Docker 镜像可构建 ----
-  verify:
-    if: github.event_name == 'pull_request'
-    runs-on: aliyun
-    steps:
-      - name: Checkout
-        uses: "http://8.161.227.145:3000/huanghaosheng/checkout@releases/v4"
-
-      - name: Verify Frontend Build
-        run: docker build -t camtalk-frontend-test ./frontend
-
-      - name: Verify Backend Build
-        run: docker build -t camtalk-backend-test ./backend
-
-      - name: Cleanup
-        run: |
-          docker rmi camtalk-frontend-test camtalk-backend-test || true
-
-  # ---- push main 时：构建并部署 ----
   deploy:
-    if: github.event_name == 'push'
     runs-on: aliyun
     steps:
       - name: Checkout