fix(deploy): retain current web assets before release

.gitea/workflows/deploy.yml

@@ -182,8 +182,11 @@ jobs:
         mkdir -p /var/lib/xiaoxia-saas-production
         old_assets_dir="/tmp/xiaoxia-previous-web-assets-${RELEASE_VERSION}"
         rm -rf "$old_assets_dir"
+        mkdir -p "$old_assets_dir"
+        if docker inspect xiaoxia-web-production >/dev/null 2>&1; then
+          docker cp xiaoxia-web-production:/usr/share/nginx/html/assets/. "$old_assets_dir"/ 2>/dev/null || true
+        fi
         if [ -d /var/lib/xiaoxia-saas-production/repo/apps/web/dist/assets ]; then
-          mkdir -p "$old_assets_dir"
           cp -a /var/lib/xiaoxia-saas-production/repo/apps/web/dist/assets/. "$old_assets_dir"/
         fi
         rm -rf /var/lib/xiaoxia-saas-production/repo

tests/unit/test_release_scripts.py

@@ -59,6 +59,7 @@ def test_production_workflow_preserves_previous_web_assets():
     production_section = workflow.split("deploy-production:", 1)[1]
 
     assert "old_assets_dir=\"/tmp/xiaoxia-previous-web-assets-${RELEASE_VERSION}\"" in production_section
+    assert "docker cp xiaoxia-web-production:/usr/share/nginx/html/assets/. \"$old_assets_dir\"/" in production_section
     assert "cp -a /var/lib/xiaoxia-saas-production/repo/apps/web/dist/assets/. \"$old_assets_dir\"/" in production_section
     assert "if [ ! -e \"/var/lib/xiaoxia-saas-production/repo/apps/web/dist/assets/$name\" ]; then" in production_section