feat(table): 表格排序与搜索改为后端处理

backend/internal/handler/admin/proxy_handler.go

@@ -52,13 +52,15 @@ func (h *ProxyHandler) List(c *gin.Context) {
 	protocol := c.Query("protocol")
 	status := c.Query("status")
 	search := c.Query("search")
+	sortBy := c.DefaultQuery("sort_by", "id")
+	sortOrder := c.DefaultQuery("sort_order", "desc")
 	// 标准化和验证 search 参数
 	search = strings.TrimSpace(search)
 	if len(search) > 100 {
 		search = search[:100]
 	}
 
-	proxies, total, err := h.adminService.ListProxiesWithAccountCount(c.Request.Context(), page, pageSize, protocol, status, search)
+	proxies, total, err := h.adminService.ListProxiesWithAccountCount(c.Request.Context(), page, pageSize, protocol, status, search, sortBy, sortOrder)
 	if err != nil {
 		response.ErrorFrom(c, err)
 		return