feat(pickup): 新增管理员线下提号功能

- 新建 admin_pickups 表独立于 rental_orders，不污染订单状态机与财务统计口径
- 提号中/已完成/已取消三态：创建锁定账号，完成时给卖家钱包加可用余额并下架 listing，取消解锁账号
- 完成时 listing 置 completed，复用现有 listingLockedForOwnerMutation 拦截再上架
- 管理端提号管理页（列表/创建/完成/取消/可提号账号搜索）+ 卖家端提号记录页
- 财务仪表盘新增线下提号独立统计块，与正常订单口径分离
- 钱包流水 label、状态标签、菜单入口同步补齐
- 优化卖家服务悬浮菜单为一行四个，尺寸与配色对齐买家服务

backend/internal/modules/pickup/handler_parse.go

@@ -0,0 +1,71 @@
+package pickup
+
+import (
+	"strconv"
+
+	"hfb_sys/backend/internal/middleware"
+	"hfb_sys/backend/pkg/response"
+
+	"github.com/gin-gonic/gin"
+)
+
+func currentAdminID(c *gin.Context) (uint64, bool) {
+	value, ok := c.Get(middleware.ContextAdminID)
+	if !ok {
+		return 0, false
+	}
+	adminID, ok := value.(uint64)
+	return adminID, ok
+}
+
+func currentUserID(c *gin.Context) (uint64, bool) {
+	value, ok := c.Get(middleware.ContextUserID)
+	if !ok {
+		return 0, false
+	}
+	userID, ok := value.(uint64)
+	return userID, ok
+}
+
+func parseID(c *gin.Context) (uint64, bool) {
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil || id == 0 {
+		response.BadRequest(c, "ID 不正确")
+		return 0, false
+	}
+	return id, true
+}
+
+func parsePagination(c *gin.Context) (int, int) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 {
+		pageSize = 20
+	}
+	if pageSize > 100 {
+		pageSize = 100
+	}
+	return page, pageSize
+}
+
+func parseAdminQuery(c *gin.Context) AdminPickupQuery {
+	page, pageSize := parsePagination(c)
+	return AdminPickupQuery{
+		Page:     page,
+		PageSize: pageSize,
+		Keyword:  c.Query("keyword"),
+		Status:   c.Query("status"),
+	}
+}
+
+func parseSellerQuery(c *gin.Context) SellerPickupQuery {
+	page, pageSize := parsePagination(c)
+	return SellerPickupQuery{
+		Page:     page,
+		PageSize: pageSize,
+		Status:   c.Query("status"),
+	}
+}