feat: add content management feature for superadmin

- Implemented API endpoint for fetching content list with filtering, sorting, and pagination.
- Added DTOs for content items and tenant information.
- Created frontend components for content management, including search and data table functionalities.
- Updated routing to include content management page.
- Enhanced the superadmin menu to navigate to the new content management section.
- Included necessary styles and scripts for the new content management interface.

backend/app/http/super/content.go

@@ -0,0 +1,33 @@
+package super
+
+import (
+	"quyun/v2/app/http/super/dto"
+	"quyun/v2/app/requests"
+	"quyun/v2/app/services"
+
+	"github.com/gofiber/fiber/v3"
+)
+
+// content provides superadmin content endpoints.
+//
+//	@provider
+type content struct{}
+
+// list
+//
+//	@Summary	内容列表（平台侧汇总）
+//	@Tags		Super
+//	@Accept		json
+//	@Produce	json
+//	@Param		filter	query		dto.SuperContentPageFilter	true	"Filter"
+//	@Success	200		{object}	requests.Pager{items=dto.SuperContentItem}
+//
+//	@Router		/super/v1/contents [get]
+//	@Bind		filter query
+func (*content) list(ctx fiber.Ctx, filter *dto.SuperContentPageFilter) (*requests.Pager, error) {
+	if filter == nil {
+		filter = &dto.SuperContentPageFilter{}
+	}
+	filter.Pagination.Format()
+	return services.Content.SuperContentPage(ctx, filter)
+}