feat: enhance sidebar quota display with progress bar and improve upload modal UX

- Replace percentage-based quota with point-based display in sidebar
- Add visual progress bar for remaining quota with gradient styling
- Implement upload progress tracking in material upload modal
- Add loading indicators and progress information during file uploads
- Prevent modal interaction while uploading by disabling close controls
- Show current upload status including file index and completion percentage

frontend/app/web-gold/src/router/index.js

@@ -173,6 +173,9 @@ router.beforeEach(async (to, from, next) => {
     await userStore.fetchUserInfo()
   }
 
+  // 4. 路由切换时更新用户额度
+  userStore.fetchUserProfile()
+
   next()
 })