perf(onboarding,settings): 权限/热键状态纯事件驱动，去掉高频轮询 (#673)

* perf(onboarding,settings): 权限/热键状态纯事件驱动，去掉所有高频轮询

issue #470：引导页桌面(1s)/Android(3s)、设置页热键(1s) 的 setInterval 高频权限/热键轮询
全部改为 window focus / visibilitychange 事件驱动，连低频兜底也去掉（纯事件驱动）。
覆盖论证：麦克风前台原生弹窗授予由申请结果回调 + 800ms 兜底覆盖；辅助功能授予必经系统
设置 App、切回 OpenLess 必触发 focus/visibilitychange。并给 onGrantAccessibility 补对称的
void refresh() + 800ms 兜底（与 onRequestMicrophone 对齐）。PermissionsSection 的
refreshPermissions(10s)/refreshNetwork(30s) 保留不动。

* fix(onboarding): DesktopOnboarding effect 内 refresh() 统一加 void

@claude 审查 #673 指出：DesktopOnboarding 的 useEffect 里 refresh()/onFocus/onVisibility
三处 refresh() 是 floating promise（与上方 Android 段的 void refresh() 不一致，IPC 失败会
静默）。统一加 void 明确 fire-and-forget。issue #470。

---------

Co-authored-by: 吕柏青 <lubaiqing9@gmail.com>

openless-all/app/src/components/Onboarding.tsx

@@ -220,12 +220,14 @@ function AndroidMicrophoneStep() {
 
   useEffect(() => {
     void refresh();
-    const id = window.setInterval(refresh, 3000);
+    // issue #470：纯事件驱动，去掉高频轮询。窗口重新聚焦或重新可见时刷新（授权必经系统设置再切回）。
     const onFocus = () => { void refresh(); };
+    const onVisibility = () => { if (document.visibilityState === 'visible') void refresh(); };
     window.addEventListener('focus', onFocus);
+    document.addEventListener('visibilitychange', onVisibility);
     return () => {
-      window.clearInterval(id);
       window.removeEventListener('focus', onFocus);
+      document.removeEventListener('visibilitychange', onVisibility);
     };
   }, []);
 
@@ -299,13 +301,15 @@ function DesktopOnboarding({
   };
 
   useEffect(() => {
-    refresh();
-    const id = window.setInterval(refresh, 1000);
-    const onFocus = () => refresh();
+    void refresh();
+    // issue #470：纯事件驱动，去掉每秒轮询。授权必经系统设置 App，切回 OpenLess 必触发 focus/visibilitychange。
+    const onFocus = () => { void refresh(); };
+    const onVisibility = () => { if (document.visibilityState === 'visible') void refresh(); };
     window.addEventListener('focus', onFocus);
+    document.addEventListener('visibilitychange', onVisibility);
     return () => {
-      window.clearInterval(id);
       window.removeEventListener('focus', onFocus);
+      document.removeEventListener('visibilitychange', onVisibility);
       if (refreshTimeoutRef.current) clearTimeout(refreshTimeoutRef.current);
     };
   }, [requiresAccessibility]);
@@ -318,6 +322,10 @@ function DesktopOnboarding({
     } finally {
       setBusy(false);
     }
+    // issue #470：与麦克风路径对称——授权动作返回后立即刷新，并挂一次 800ms 兜底覆盖 app 内按钮发起的授予。
+    void refresh();
+    if (refreshTimeoutRef.current) clearTimeout(refreshTimeoutRef.current);
+    refreshTimeoutRef.current = window.setTimeout(refresh, 800);
   };
 
   const onRequestMicrophone = async () => {

openless-all/app/src/pages/settings/PermissionsSection.tsx

@@ -80,13 +80,11 @@ export function PermissionsSection() {
       refreshWindowsIme();
     }
     refreshNetwork();
-    const hotkeyId = platformCaps?.supportsDesktopHotkey === true
-      ? window.setInterval(refreshHotkey, 1000)
-      : undefined;
+    // issue #470：热键状态改为纯事件驱动，去掉每秒轮询，靠下方 focus/visibilitychange 刷新。
     // 麦克风检查会短暂打开输入流，避免每秒探测导致隐私指示器频繁闪烁。
     const permissionId = window.setInterval(refreshPermissions, 10000);
     const networkId = window.setInterval(refreshNetwork, 30000);
-    const onFocus = () => {
+    const refreshAll = () => {
       refreshPermissions();
       if (platformCaps?.supportsDesktopHotkey === true) {
         refreshHotkey();
@@ -96,12 +94,15 @@ export function PermissionsSection() {
       }
       refreshNetwork();
     };
+    const onFocus = () => refreshAll();
+    const onVisibility = () => { if (document.visibilityState === 'visible') refreshAll(); };
     window.addEventListener('focus', onFocus);
+    document.addEventListener('visibilitychange', onVisibility);
     return () => {
-      if (hotkeyId !== undefined) window.clearInterval(hotkeyId);
       window.clearInterval(permissionId);
       window.clearInterval(networkId);
       window.removeEventListener('focus', onFocus);
+      document.removeEventListener('visibilitychange', onVisibility);
     };
   }, [platformCaps?.platform, platformCaps?.supportsDesktopHotkey]);