fix(windows): tighten WebView2 idle hooks from #273 review (#276)

- Type `window.__psyHidden` once via global declaration; drop 6 `(window as any)` casts.
- `WindowVisibilityProvider` now ORs `window.__psyHidden` into the hidden state
  (and into the initial state). On WebView2 `document.hidden` does not always
  flip when `win.hide()` is called, so effects gated by `useWindowVisibility()`
  can now actually skip creating intervals/rAF instead of relying solely on the
  per-tick fallback check.
- Slow visible-poll from 200 ms to 500 ms (5 → 2 wakeups/s for visibility alone).
- Fix stray leading-space indent in `App.tsx` `window:close-requested` comment.

Co-authored-by: Psychotoxical <dev@psysonic.app>

src/components/Hero.tsx

@@ -95,7 +95,7 @@ export default function Hero({ albums: albumsProp }: HeroProps = {}) {
     timerRef.current = null;
     if (len <= 1 || windowHidden) return;
     timerRef.current = setInterval(() => {
-      if (document.hidden || (window as any).__psyHidden) return;
+      if (document.hidden || window.__psyHidden) return;
       setActiveIdx(prev => (prev + 1) % len);
     }, INTERVAL_MS);
   }, [windowHidden]);

src/components/MiniPlayer.tsx

@@ -239,7 +239,7 @@ export default function MiniPlayer() {
       if (typeof e.payload.volume === 'number') setVolumeState(e.payload.volume);
     });
     const unProgress = listen<ProgressPayload>('audio:progress', (e) => {
-      if (hiddenRef.current || (window as any).__psyHidden) return;
+      if (hiddenRef.current || window.__psyHidden) return;
       setCurrentTime(e.payload.current_time);
       if (e.payload.duration > 0) setDuration(e.payload.duration);
     });

src/components/PlaybackScheduleBadge.tsx

@@ -52,7 +52,7 @@ export default function PlaybackScheduleBadge({ layoutAnchorRef, className }: Pl
   useEffect(() => {
     if (deadlineMs == null || windowHidden) return;
     const id = window.setInterval(() => {
-      if (document.hidden || (window as any).__psyHidden) return;
+      if (document.hidden || window.__psyHidden) return;
       setNowMs(Date.now());
     }, 500);
     return () => window.clearInterval(id);

src/components/WaveformSeek.tsx

@@ -750,7 +750,7 @@ export function SeekbarPreview({
       }
     };
     const tick = () => {
-      if (document.hidden || (window as any).__psyHidden) {
+      if (document.hidden || window.__psyHidden) {
         pollId = window.setTimeout(() => {
           pollId = null;
           tick();
@@ -900,7 +900,7 @@ export default function WaveformSeek({ trackId }: Props) {
       }
     };
     const tick = () => {
-      if (document.hidden || (window as any).__psyHidden) {
+      if (document.hidden || window.__psyHidden) {
         pollId = window.setTimeout(() => {
           pollId = null;
           tick();