实现头像更换功能：添加onAvatarClick方法，点击头像时弹出更换选择，上传后更新avatarUrl字段

pages/profile/index.js

@@ -1114,4 +1114,74 @@ Page({
     });
   },
 
+  // 点击头像更换图片
+  onAvatarClick() {
+    wx.chooseImage({
+      count: 1,
+      sizeType: ['compressed'],
+      sourceType: ['album', 'camera'],
+      success: (res) => {
+        const tempFilePaths = res.tempFilePaths;
+        if (tempFilePaths && tempFilePaths.length > 0) {
+          this.uploadAvatar(tempFilePaths[0]);
+        }
+      },
+      fail: (err) => {
+        console.error('选择图片失败:', err);
+      }
+    });
+  },
+
+  // 上传头像并更新
+  async uploadAvatar(filePath) {
+    wx.showLoading({ title: '上传中...', mask: true });
+
+    try {
+      // 上传图片到服务器
+      const API = require('../../utils/api.js');
+      const result = await API.uploadSettlementFile(filePath, 'avatar');
+      
+      if (result && result.fileUrl) {
+        const avatarUrl = result.fileUrl;
+        
+        // 更新本地和全局用户信息
+        const app = getApp();
+        const updatedUserInfo = {
+          ...this.data.userInfo,
+          avatarUrl: avatarUrl
+        };
+
+        // 保存到本地存储和全局状态
+        app.globalData.userInfo = updatedUserInfo;
+        wx.setStorageSync('userInfo', updatedUserInfo);
+
+        // 更新页面显示
+        this.setData({ userInfo: updatedUserInfo });
+
+        // 上传到服务器更新数据库
+        const userId = wx.getStorageSync('userId');
+        if (userId) {
+          await this.uploadUserInfoToServer(updatedUserInfo, userId, this.data.userType);
+        }
+
+        wx.showToast({
+          title: '头像更新成功',
+          icon: 'success',
+          duration: 2000
+        });
+      } else {
+        throw new Error('上传失败');
+      }
+    } catch (error) {
+      console.error('上传头像失败:', error);
+      wx.showToast({
+        title: '上传失败，请重试',
+        icon: 'none',
+        duration: 2000
+      });
+    } finally {
+      wx.hideLoading();
+    }
+  },
+
 })

pages/profile/index.wxml

@@ -3,7 +3,8 @@
     <view style="display: flex; align-items: center;">
       <image 
         src="{{userInfo.avatarUrl || '/images/你有好蛋.png'}}" 
-        style="width: 100rpx; height: 100rpx; border-radius: 50%; margin-right: 20rpx;"
+        style="width: 100rpx; height: 100rpx; border-radius: 50%; margin-right: 20rpx; cursor: pointer;"
+        bindtap="onAvatarClick"
       ></image>
       <view>
         <view style="font-size: 32rpx; font-weight: bold;">{{userInfo.hiddenPhoneNumber || userInfo.phoneNumber || '未登录'}}</view>