feat: Enhance Swagger documentation with new admin and user endpoints

- Added definitions for admin authentication, media, posts, orders, and user management.
- Implemented new API paths for admin functionalities including authentication, media management, order processing, and user statistics.
- Updated existing endpoints to improve clarity and structure in the Swagger documentation.
- Introduced new response schemas for various operations to standardize API responses.

backend_v1/app/http/v1/demo.go

@@ -30,18 +30,20 @@ type Filter struct {
 
 type ResponseItem struct{}
 
-// Foo
+// Foo 演示端点：展示 Fiber 参数绑定与 Swagger 注释写法。
 //
-//	@Summary		Test
-//	@Description	Test
-//	@Tags			Test
-//	@Accept			json
+//	@Summary		演示接口
+//	@Tags			Demo
+//	@Accept			multipart/form-data
 //	@Produce		json
 //
-//	@Param			id		path		int									true	"ID"
-//	@Param			query	query		Filter								true	"Filter"
-//	@Param			pager	query		requests.Pagination					true	"Pager"
-//	@Success		200		{object}	requests.Pager{list=ResponseItem}	"成功"
+//	@Param			id			path		int					true	"ID"
+//	@Param			pager		query		requests.Pagination	false	"分页参数"
+//	@Param			query		query		FooQuery				false	"查询参数"
+//	@Param			Content-Type	header		string				false	"内容类型"
+//	@Param			folder		formData	string				false	"上传到指定文件夹"
+//	@Param			file		formData	file				true	"上传文件"
+//	@Success		200			{object}	requests.Pager{items=ResponseItem}	"成功"
 //
 //	@Router			/v1/medias/:id [post]
 //	@Bind			query query