feat(pickup): 线下提号支持扩展字段店铺管理CRUD及时间筛选

- 线下提号创建表单扩展：增加「操作人」、「第三方单号」、「下单金额」、「押金金额」字段，重构弹窗布局为紧凑双列/三列金额卡片排布，消除过度垂直滚动并默认预填操作人
- 店铺管理 CRUD：新增 pickup_shops 配置表与配套 API，支持在提号页面直接管理店铺（增删改查、启用/禁用、筛选），下拉选项自动优先加载活跃配置店铺并兼顾历史店铺
- 列表时间范围筛选：增加精确到秒的「日期+时间」时间范围选择器，支持快捷时段与后端时间范围过滤
- 生产环境数据核查：只读提取线上全部 61 项历史提号店铺名称与单量分布，完整整理沉淀至实施文档供后续映射规则参考
- 验证方式：执行并通过全套端到端代码门禁（scripts/check.sh：SQL约束、go vet、go build、MySQL真实测试库单元测试及覆盖率、vue大小检查、prettier、eslint、vue-tsc及vite构建）

backend/internal/modules/pickup/handler_parse.go

@@ -2,6 +2,8 @@ package pickup
 
 import (
 	"strconv"
+	"strings"
+	"time"
 
 	"hfb_sys/backend/internal/middleware"
 	"hfb_sys/backend/pkg/response"
@@ -51,6 +53,26 @@ func parsePagination(c *gin.Context) (int, int) {
 	return page, pageSize
 }
 
+func parseFlexibleTime(val string) *time.Time {
+	val = strings.TrimSpace(val)
+	if val == "" {
+		return nil
+	}
+	layouts := []string{
+		"2006-01-02 15:04:05",
+		time.RFC3339,
+		"2006-01-02T15:04:05",
+		"2006-01-02",
+	}
+	loc := time.Local
+	for _, layout := range layouts {
+		if t, err := time.ParseInLocation(layout, val, loc); err == nil {
+			return &t
+		}
+	}
+	return nil
+}
+
 func parseAdminQuery(c *gin.Context) AdminPickupQuery {
 	page, pageSize := parsePagination(c)
 	return AdminPickupQuery{
@@ -61,6 +83,18 @@ func parseAdminQuery(c *gin.Context) AdminPickupQuery {
 		ShopName:                c.Query("shop_name"),
 		AccountSource:           c.Query("account_source"),
 		OfflineSettlementStatus: c.Query("offline_settlement_status"),
+		Operator:                c.Query("operator"),
+		ThirdPartyOrderNo:       c.Query("third_party_order_no"),
+		StartTime:               parseFlexibleTime(c.Query("start_time")),
+		EndTime:                 parseFlexibleTime(c.Query("end_time")),
+	}
+}
+
+func parsePickupShopQuery(c *gin.Context) PickupShopQuery {
+	return PickupShopQuery{
+		Keyword:  c.Query("keyword"),
+		Platform: c.Query("platform"),
+		Status:   c.Query("status"),
 	}
 }