feat: 订场页改为网格时间表，支持多场地多时段选择

- private/index.vue 重写为场地×时间网格，双向滚动，sticky表头
- 当前时间红线指示，已过时灰块/已占用浅红/已选中蓝色
- 支持多场地连续时段选择，非连续会提示
- 日期改为近7天，Tab栏样式与约课页统一
- 底部按钮：未选时全宽长条，选中后显示摘要+小按钮
- privateBooking.js 新增 getPrivateBookingGrid API
- quote/create 改为 items[] 格式，每场地独立时间段
- confirm.vue 按 items 逐条展示
- pages/private/index.vue onShow 自动刷新
- .env 冰场馆URL修正

miniprogram/src/modules/comprehensive/api/privateBooking.js

@@ -10,12 +10,22 @@ const toQuoteCourt = (backendCourt = {}) => ({
   court_type_label: backendCourt.court_type_label || ''
 })
 
+const toQuoteItem = (backendItem = {}) => ({
+  court_id: backendItem.court_id ?? null,
+  court_name: backendItem.court_name || '',
+  start_at: backendItem.start_at || '',
+  end_at: backendItem.end_at || '',
+  unit_count: toNumber(backendItem.unit_count),
+  amount: backendItem.amount || '0.00'
+})
+
 const toPrivateQuote = (backendQuote = {}) => ({
   amount: backendQuote.amount || '0.00',
   unit_count: toNumber(backendQuote.unit_count),
   start_at: backendQuote.start_at || '',
   end_at: backendQuote.end_at || '',
-  courts: toArray(backendQuote.courts).map(toQuoteCourt)
+  courts: toArray(backendQuote.courts).map(toQuoteCourt),
+  items: toArray(backendQuote.items).map(toQuoteItem)
 })
 
 const toPrivateCreateResult = (backendData = {}) => ({
@@ -44,6 +54,34 @@ const toPrivateBookingOptions = (backendData = {}) => ({
   time_options: toArray(backendData.time_options).map(toPrivateTimeOption)
 })
 
+const toGridCourt = (backendCourt = {}) => ({
+  id: backendCourt.id ?? null,
+  name: backendCourt.name || ''
+})
+
+const toGridSlot = (backendSlot = {}) => ({
+  start: backendSlot.start || '',
+  end: backendSlot.end || ''
+})
+
+const toGridOccupation = (backendOcc = {}) => ({
+  court_id: backendOcc.court_id ?? null,
+  start_at: backendOcc.start_at || '',
+  end_at: backendOcc.end_at || ''
+})
+
+const toPrivateBookingGrid = (backendData = {}) => ({
+  date: backendData.date || '',
+  court_type: backendData.court_type || '',
+  court_type_label: backendData.court_type_label || '',
+  open_time: backendData.open_time || '',
+  close_time: backendData.close_time || '',
+  unit_price: backendData.unit_price || '0.00',
+  courts: toArray(backendData.courts).map(toGridCourt),
+  time_slots: toArray(backendData.time_slots).map(toGridSlot),
+  occupations: toArray(backendData.occupations).map(toGridOccupation)
+})
+
 export const privateBookingApi = {
   getPrivateBookingOptions(params = {}) {
     return request({
@@ -55,25 +93,33 @@ export const privateBookingApi = {
       })
     }).then(toPrivateBookingOptions)
   },
+
+  getPrivateBookingGrid(params = {}) {
+    return request({
+      url: '/api/bookings/private/grid',
+      data: compactParams({
+        date: params.date,
+        court_type: params.courtType || params.court_type
+      })
+    }).then(toPrivateBookingGrid)
+  },
+
   quotePrivateBooking(payload = {}) {
     return request({
       url: '/api/bookings/private/quote',
       method: 'POST',
       data: {
-        court_ids: toArray(payload.court_ids),
-        start_at: payload.start_at,
-        end_at: payload.end_at
+        items: toArray(payload.items)
       }
     }).then(toPrivateQuote)
   },
+
   createPrivateBooking(payload = {}) {
     return request({
       url: '/api/bookings/private',
       method: 'POST',
       data: {
-        court_ids: toArray(payload.court_ids),
-        start_at: payload.start_at,
-        end_at: payload.end_at
+        items: toArray(payload.items)
       }
     }).then(toPrivateCreateResult)
   }