Fix file overwrite permission issues in deployment

- Exclude .git directory from tar archive
- Clean target directory before extraction
- Prevent file exists and permission denied errors
- Ensure clean deployment without conflicts

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -46,10 +46,10 @@ jobs:
           ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} \
             "which rsync && rsync --version"
 
-      - name: Alternative deployment via tar and SSH
+      - name: Clean and deploy via tar and SSH
         run: |
-          tar czf - . | ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} \
-            "cd /volume1/homes/admin/nginx-infra && tar xzf -"
+          tar czf - --exclude='.git' . | ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} \
+            "rm -rf /volume1/homes/admin/nginx-infra/* && cd /volume1/homes/admin/nginx-infra && tar xzf -"
 
       - name: Check Docker permissions
         run: |