feat(user): 新增收货地址管理及售后申请页面

- 新增地址类型定义，增强前端地址数据结构
- 新增地址编辑页面，支持地址智能识别和定位选点功能
- 地址编辑支持省市区选择及默认地址设置
- 新增地址列表页面，支持地址展示、删除、编辑和选择功能
- 实现售后申请页面，支持选择售后类型和退款原因
- 售后申请支持商品选择、退款金额计算和凭证上传
- 新增售后详情页面，支持售后状态展示及申请取消
- 优化页面加载和用户交互体验，增加错误提示和权限处理

src_bak/components/common/VirtualList/index.tsx

@@ -0,0 +1,69 @@
+import { View, ScrollView } from '@tarojs/components';
+import { useState, useEffect, useRef, useCallback } from 'react';
+
+interface VirtualListProps<T> {
+  data: T[];
+  itemHeight: number;
+  containerHeight: number;
+  renderItem: (item: T, index: number) => JSX.Element;
+  keyExtractor: (item: T, index: number) => string | number;
+  onEndReached?: () => void;
+  onEndReachedThreshold?: number;
+}
+
+export default function VirtualList<T>({
+  data,
+  itemHeight,
+  containerHeight,
+  renderItem,
+  keyExtractor,
+  onEndReached,
+  onEndReachedThreshold = 0
+}: VirtualListProps<T>) {
+  const [startIndex, setStartIndex] = useState(0);
+  const [endIndex, setEndIndex] = useState(Math.ceil(containerHeight / itemHeight) + 5);
+  const scrollViewRef = useRef<any>(null);
+
+  const visibleItemCount = Math.ceil(containerHeight / itemHeight) + 10;
+  const offsetY = startIndex * itemHeight;
+
+  const handleScroll = useCallback((e: any) => {
+    const scrollTop = e.detail.scrollTop;
+    const newStartIndex = Math.floor(scrollTop / itemHeight);
+    const newEndIndex = newStartIndex + visibleItemCount;
+
+    setStartIndex(Math.max(0, newStartIndex - 5));
+    setEndIndex(Math.min(data.length, newEndIndex + 5));
+
+    // 触底加载
+    if (onEndReached && onEndReachedThreshold > 0) {
+      const { scrollHeight, clientHeight } = e.detail;
+      if (scrollHeight - scrollTop - clientHeight < onEndReachedThreshold) {
+        onEndReached();
+      }
+    }
+  }, [itemHeight, visibleItemCount, data.length, onEndReached, onEndReachedThreshold]);
+
+  const visibleData = data.slice(startIndex, endIndex);
+
+  return (
+    <ScrollView
+      ref={scrollViewRef}
+      className="w-full"
+      style={{ height: containerHeight }}
+      scrollY
+      onScroll={handleScroll}
+      scrollWithAnimation
+    >
+      <View style={{ height: data.length * itemHeight, position: 'relative' }}>
+        <View style={{ transform: `translateY(${offsetY}px)` }}>
+          {visibleData.map((item, index) => (
+            <View key={keyExtractor(item, startIndex + index)} style={{ height: itemHeight }}>
+              {renderItem(item, startIndex + index)}
+            </View>
+          ))}
+        </View>
+      </View>
+    </ScrollView>
+  );
+}