refactor: 快照不再回退到类型默认脚本

par-core/src/main/java/com/par/core/service/impl/SiteSnapshotServiceImpl.java

@@ -75,13 +75,7 @@ public class SiteSnapshotServiceImpl implements SiteSnapshotService {
                 log.warn("读取脚本失败 siteId={}: {}", siteId, e.getMessage());
             }
         }
-        if (!snapshot.containsKey("script") && siteType != null) {
-            String defScript = GroovyScriptEngine.loadDefaultByType(siteType);
-            if (defScript != null) {
-                snapshot.put("script", defScript);
-                snapshot.put("scriptSource", "default");
-            }
-        }
+        // 无自定义脚本则跳过，不回退到默认模板
 
         // 2. 页面配置
         Map<String, Object> pages = sitePagesService.getPages(siteId);