docs: 消息详情页查看后刷新未读消息数

- 消息详情页获取详情后调用 userStore.fetchUserInfo(true)
- 刷新用户信息以更新 unreadMsgCount
- 从而使 TabBar 红点状态同步更新

修改文件:
- src/pages/message-detail/index.vue: 添加 useUserStore 导入和刷新调用
- src/api/news.js: 修复注释格式（全角分号）

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

@@ -51,6 +51,7 @@ import { ref, computed } from 'vue'
 import { useLoad } from '@tarojs/taro'
 import { useLoad } from '@tarojs/taro'
 import NavHeader from '@/components/navigation/NavHeader.vue'
 import NavHeader from '@/components/navigation/NavHeader.vue'
 import { detailAPI } from '@/api/news'
 import { detailAPI } from '@/api/news'
+import { useUserStore } from '@/stores/user'
 
 
 const detail = ref(null)
 const detail = ref(null)
 const loading = ref(true)
 const loading = ref(true)
@@ -86,6 +87,10 @@ const fetchDetail = async (id) => {
         ...res.data,
         ...res.data,
         title: res.data.title || mockTitle
         title: res.data.title || mockTitle
       }
       }
+
+      // 查看消息后刷新用户信息，更新未读消息数
+      const userStore = useUserStore()
+      await userStore.fetchUserInfo(true)
     }
     }
   } catch (err) {
   } catch (err) {
     console.error('获取消息详情失败:', err)
     console.error('获取消息详情失败:', err)