chore: 简化 CI/CD，部署由 Vercel 自动处理

Author: TARS

.github/workflows/ci.yml

@@ -1,10 +1,10 @@
-name: CI/CD
+name: CI
 
 on:
   push:
-    branches: [main, master]
+    branches: [master]
   pull_request:
-    branches: [main, master]
+    branches: [master]
 
 jobs:
   build:
@@ -28,38 +28,3 @@ jobs:
 
       - name: Build
         run: npm run build
-
-  # Vercel 部署（生产环境）
-  deploy-production:
-    runs-on: ubuntu-latest
-    needs: build
-    if: github.ref == 'refs/heads/main'
-    
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Deploy to Vercel (Production)
-        uses: vercel/action-deploy@v1
-        with:
-          vercel-token: ${{ secrets.VERCEL_TOKEN }}
-          vercel-org-id: ${{ secrets.VERCEL_ORG_ID }}
-          vercel-project-id: ${{ secrets.VERCEL_PROJECT_ID }}
-          vercel-args: '--prod'
-
-  # Vercel 部署（预览环境）
-  deploy-preview:
-    runs-on: ubuntu-latest
-    needs: build
-    if: github.ref != 'refs/heads/main'
-    
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Deploy to Vercel (Preview)
-        uses: vercel/action-deploy@v1
-        with:
-          vercel-token: ${{ secrets.VERCEL_TOKEN }}
-          vercel-org-id: ${{ secrets.VERCEL_ORG_ID }}
-          vercel-project-id: ${{ secrets.VERCEL_PROJECT_ID }}