新增摸大红业务并修复后台链接按钮白字

支持分类筛选、搜索、下单支付建群与固定二维码；合并迁移种子数据；后台表格编辑/详情链接恢复主题色可见。

backend/internal/modules/file/handler.go

@@ -65,7 +65,12 @@ func (h *Handler) writeObject(c *gin.Context, publicOnly bool) {
 		response.BadRequest(c, "文件 key 不正确")
 		return
 	}
-	if publicOnly && !strings.HasPrefix(key, "home-banner/") && !strings.HasPrefix(key, "avatar/") && !strings.HasPrefix(key, "payment-cert/") && !strings.HasPrefix(key, "announcement/") {
+	if publicOnly &&
+		!strings.HasPrefix(key, "home-banner/") &&
+		!strings.HasPrefix(key, "avatar/") &&
+		!strings.HasPrefix(key, "payment-cert/") &&
+		!strings.HasPrefix(key, "announcement/") &&
+		!strings.HasPrefix(key, "mohong/") {
 		response.Error(c, http.StatusNotFound, "not_found", "文件不存在或暂不可访问")
 		return
 	}