feat(index): 添加页面加载超时提示，修改默认主题设置为跟随系统

fix(service-worker): 优化清理运行时缓存逻辑

src/views/setting/AccountSettingNotification.vue

@@ -45,7 +45,7 @@ const templateTypes = ref([
 
 // 编辑器主题
 const { name: themeName, global: globalTheme } = useTheme()
-const savedTheme = ref(localStorage.getItem('theme') ?? themeName)
+const savedTheme = ref(localStorage.getItem('theme') ?? 'auto')
 const currentThemeName = ref(savedTheme.value)
 const editorTheme = computed(() => (currentThemeName.value === 'light' ? 'github' : 'monokai'))