✨ feat(templates): 增强模板文件关系查询

- 扩展relations配置，从['file']调整为['file.uploadUser']
- 支持查询模板文件时同时获取上传用户信息

src/server/api/templates/index.ts

@@ -10,7 +10,7 @@ const templateRoutes = createCrudRoutes({
   getSchema: TemplateSchema,
   listSchema: TemplateSchema,
   searchFields: ['title', 'description', 'category'],
-  relations: ['file'],
+  relations: ['file.uploadUser'],
   middleware: [authMiddleware] // 需要登录才能管理模板
 });