fix: Settings页面mount时刷新bot状态，防止显示过期数据

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

web/src/views/Settings.vue

@@ -634,6 +634,7 @@ async function savePrefix() {
 }
 
 onMounted(() => {
+  store.fetchBots(); // Refresh bot status on page visit
   checkAuthStatus();
   loadQuality();
 });