Fix deploy: clear PHP source dirs before SCP so deleted files don't persist

SCP only adds/overwrites files, never deletes. Clearing app/, routes/,
config/, database/, resources/, bootstrap/ before copy ensures the server
always reflects the current git state exactly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -35,6 +35,15 @@ jobs:
           LOG_CHANNEL=stderr
           EOF
 
+      - name: PHP-Quellverzeichnisse leeren
+        uses: appleboy/ssh-action@v1.2.0
+        with:
+          host: ${{ vars.VPS_HOST }}
+          username: ${{ vars.VPS_USER }}
+          key: ${{ secrets.SSH_PRIVATE_KEY }}
+          known_hosts: ${{ vars.SSH_KNOWN_HOSTS }}
+          script: rm -rf ~/app/app ~/app/routes ~/app/config ~/app/database ~/app/resources ~/app/bootstrap
+
       - name: Dateien auf VPS kopieren
         uses: appleboy/scp-action@v0.1.7
         with: