fix(order): 修复订单列表页登录后仍看到别人订单问题

- 使用 userIdRef 避免闭包过期，确保加载订单时 userId 正确
- loadOrders 函数开头增加硬拦截，没有 userId 则不加载订单
- useEffect 中添加 user?.userId 判断，等待有效 userId 再加载
- useEffect 依赖数组加入 user?.userId，userId 变化时重新加载订单

feat(index): 首页铃铛接入新订单轮询与提示

- 登录后获取店员身份，使用 isClerkRef 避免闭包问题
- 通过 useNewOrderDetector 每30秒轮询门店订单，仅店员有效
- 新订单时触发震动和提示，铃铛数字角标动态显示新订单数
- 铃铛点击区分店员和普通用户，店员跳门店订单页并清除未读
- 页面展示时刷新店员身份，确保身份状态及时更新

src/pages/index/index.tsx

@@ -1,9 +1,12 @@
-import React, { useState, useEffect } from 'react'
+import React, { useState, useEffect, useCallback, useRef } from 'react'
 import { View, Text, ScrollView, Swiper, SwiperItem, Image } from '@tarojs/components'
-import Taro from '@tarojs/taro'
+import Taro, { useDidShow } from '@tarojs/taro'
 import { useUser } from '@/hooks/useUser'
 import { useShare } from '@/hooks/useShare'
 import { useScrollHeight } from '@/hooks/useScrollHeight'
+import { useNewOrderDetector } from '@/hooks/useNewOrderDetector'
+import { getMyClerk } from '@/api/shop/shopStoreUser'
+import { pageShopOrder } from '@/api/shop/shopOrder'
 import { listCmsAd } from '@/api/cms/cmsAd'
 import { listCmsArticle } from '@/api/cms/cmsArticle'
 import { pageShopGoods } from '@/api/shop/shopGoods'
@@ -35,6 +38,62 @@ const IndexPage: React.FC = () => {
     enableCopyUrl: true,
   })
 
+  // ─── 门店店员身份检测 ──────────────────────────────────────────
+  const [isClerk, setIsClerk] = useState(false)
+  const isClerkRef = useRef(false)
+
+  // 登录后检查是否为门店店员
+  useEffect(() => {
+    if (!isLoggedIn) {
+      setIsClerk(false)
+      isClerkRef.current = false
+      return
+    }
+    getMyClerk()
+      .then(data => {
+        const clerk = !!data
+        setIsClerk(clerk)
+        isClerkRef.current = clerk
+      })
+      .catch(() => {
+        setIsClerk(false)
+        isClerkRef.current = false
+      })
+  }, [isLoggedIn])
+
+  // 页面重新显示时也刷新店员身份（可能从其他页面回来时状态变了）
+  useDidShow(() => {
+    if (isLoggedIn) {
+      getMyClerk()
+        .then(data => {
+          const clerk = !!data
+          setIsClerk(clerk)
+          isClerkRef.current = clerk
+        })
+        .catch(() => {
+          isClerkRef.current = false
+        })
+    }
+  })
+
+  // ─── 新订单轮询检测（仅店员生效）────────────────────────────────
+  const { newOrderCount, clearUnread } = useNewOrderDetector({
+    interval: 30000, // 30 秒轮询一次
+    fetchLatestOrders: useCallback(() => {
+      // 非店员不请求，返回空数组（baseline 不会建立，无副作用）
+      if (!isClerkRef.current) return Promise.resolve([])
+      return pageShopOrder({ page: 1, limit: 5 }).then(r => r?.list || [])
+    }, []),
+    onNewOrders: useCallback((count) => {
+      Taro.vibrateShort({ type: 'medium' })
+      Taro.showToast({
+        title: `您有 ${count} 条新订单`,
+        icon: 'none',
+        duration: 2500,
+      })
+    }, []),
+  })
+
 
   const categories = ['全部', '球拍', '球鞋', '服装', '配件']
 
@@ -94,6 +153,13 @@ const IndexPage: React.FC = () => {
       Taro.navigateTo({ url: '/passport/login' })
       return
     }
+    // 店员 → 跳转门店订单管理页，有新订单时清除未读计数
+    if (isClerk) {
+      if (newOrderCount > 0) clearUnread()
+      Taro.navigateTo({ url: '/pages/store/orders/index' })
+      return
+    }
+    // 普通用户 → 跳消息通知页
     Taro.navigateTo({ url: '/pages/index/notification' })
   }
 
@@ -121,9 +187,16 @@ const IndexPage: React.FC = () => {
             <Text className='text-gray-400 text-sm flex-1'>搜索商品</Text>
           </View>
         </View>
-        <View onClick={handleMessageClick}>
+        <View onClick={handleMessageClick} className='relative'>
           <Text className='text-xl'>🔔</Text>
-          {isLoggedIn && (
+          {isLoggedIn && newOrderCount > 0 && (
+            <View className='absolute -top-1 -right-1 min-w-[16px] h-4 px-1 bg-red-500 rounded-full flex items-center justify-center'>
+              <Text className='text-white text-[10px] leading-none font-medium'>
+                {newOrderCount > 99 ? '99+' : newOrderCount}
+              </Text>
+            </View>
+          )}
+          {isLoggedIn && newOrderCount === 0 && (
             <View className='absolute top-0 right-0 w-2 h-2 bg-red-500 rounded-full' />
           )}
         </View>