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

frontend/src/router/adminRoutes.ts

@@ -36,6 +36,12 @@ export const adminRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/admin/views/AdminRefundReviewView.vue'),
     meta: adminMeta,
   },
+  {
+    path: adminPath('pickup'),
+    name: 'admin-pickup',
+    component: () => import('@/features/admin/views/AdminPickupView.vue'),
+    meta: adminMeta,
+  },
   {
     path: adminPath('orders/:id'),
     name: 'admin-order-detail',

frontend/src/router/sellerRoutes.ts

@@ -31,4 +31,10 @@ export const sellerRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/seller/views/SellerEarningsView.vue'),
     meta: { requiresAuth: true },
   },
+  {
+    path: '/seller/pickups',
+    name: 'seller-pickups',
+    component: () => import('@/features/seller/views/SellerPickupsView.vue'),
+    meta: { requiresAuth: true },
+  },
 ]