feat: add version number v0.1.5 to profile page footer

miniprogram/pages/profile/profile.wxml

@@ -61,6 +61,8 @@
     </view>
 
     <view class="logout-btn" bindtap="onLogout">退出登录</view>
+
+    <view class="version-text">v0.1.5</view>
   </view>
 
   <!-- Edit profile modal -->

miniprogram/pages/profile/profile.wxss

@@ -254,3 +254,11 @@
   background: #ffffff;
   border-radius: 24rpx;
 }
+
+.version-text {
+  text-align: center;
+  font-size: 24rpx;
+  color: #cccccc;
+  margin-top: 40rpx;
+  padding-bottom: 40rpx;
+}