fix: support both docker compose (v2) and docker-compose (v1) in deploy

The target server has Docker Compose V1 (standalone binary) not the V2
plugin, so 'docker compose' fails. Detect which is available at runtime
and use the appropriate command.

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

.gitea/workflows/docker-build.yml

@@ -128,8 +128,13 @@ jobs:
           script: |
             cd ${{ secrets.DEPLOY_PATH }}
             echo "${{ secrets.REGISTRY_TOKEN }}" | docker login git.necloud.us -u "${{ secrets.REGISTRY_USER }}" --password-stdin
-            docker compose pull backend frontend
-            docker compose up -d --no-build backend frontend
+            if docker compose version > /dev/null 2>&1; then
+              docker compose pull backend frontend
+              docker compose up -d --no-build backend frontend
+            else
+              docker-compose pull backend frontend
+              docker-compose up -d --no-build backend frontend
+            fi
             docker logout git.necloud.us
             docker image prune -f