feat(circle): 添加酒友圈社交模块

- 新增酒友圈、圈子详情、发布动态、好友列表、活动创建等页面配置
- 添加酒友圈相关API接口，包括动态、评论、好友、活动等功能
- 实现模拟数据用于前端开发和测试
- 创建评论项、空状态、活动卡片、动态卡片、好友项等组件
- 编写酒友圈模块详细的接口文档，定义数据结构和业务规则

components/FriendItem.vue

@@ -0,0 +1,99 @@
+<template>
+  <view class="friend-item" @click="$emit('tap', friend)">
+    <view class="friend-avatar-wrap">
+      <image v-if="friend.avatar" class="friend-avatar" :src="friend.avatar" mode="aspectFill"></image>
+      <view v-else class="friend-avatar friend-avatar-ph">
+        <text class="friend-avatar-text">{{ friend.nickname ? friend.nickname[0] : '酒' }}</text>
+      </view>
+      <view v-if="friend.online" class="friend-online"></view>
+    </view>
+    <view class="friend-info">
+      <text class="friend-name">{{ friend.nickname }}</text>
+      <text class="friend-last">{{ friend.lastDrink }} · {{ friend.lastDrinkTime }}</text>
+    </view>
+    <slot name="action"></slot>
+  </view>
+</template>
+
+<script>
+export default {
+  name: 'FriendItem',
+  props: {
+    friend: { type: Object, default: () => ({}) }
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+.friend-item {
+  display: flex;
+  align-items: center;
+  gap: $sp-md;
+  padding: $sp-lg;
+  background: $bg-card;
+  border-radius: $radius-lg;
+  border: 1rpx solid var(--border-faint, rgba(255,255,255,0.08));
+  margin-bottom: $sp-sm;
+
+  &:active {
+    background: $bg-card-alt;
+  }
+}
+
+.friend-avatar-wrap {
+  position: relative;
+  flex-shrink: 0;
+}
+
+.friend-avatar {
+  width: 88rpx;
+  height: 88rpx;
+  border-radius: 50%;
+}
+
+.friend-avatar-ph {
+  background: linear-gradient(135deg, rgba(232,168,56,0.15), rgba(139,133,184,0.15));
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.friend-avatar-text {
+  font-size: $fs-lg;
+  font-weight: $fw-bold;
+  color: $amber;
+}
+
+.friend-online {
+  position: absolute;
+  bottom: 4rpx;
+  right: 4rpx;
+  width: 20rpx;
+  height: 20rpx;
+  border-radius: 50%;
+  background: $mint;
+  border: 3rpx solid $bg-card;
+}
+
+.friend-info {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 6rpx;
+}
+
+.friend-name {
+  font-size: $fs-base;
+  font-weight: $fw-bold;
+  color: $text-primary;
+}
+
+.friend-last {
+  font-size: $fs-xs;
+  color: $text-tertiary;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+</style>