fix(player): the playing film restarts in place; arrows stay the volume; the bands' holds end

- The info overlay's collection strip listing the film itself: Play/Restart restart or resume it in
  place instead of pausing it on a frozen 0:00.
- Up/Down on the closed ⋯ and tracks buttons stay the volume (openOnArrowKey: false).
- A keyboard focus in the bands holds them for 10 s after the last key, not the whole film; a tap
  leaving a tapped button no longer re-shows the bands its own toggle then hid.
- Next leaving under the focus hands it to its neighbour (the player keeps its focus).
- The chosen audio / subtitle track wears the MenuCheck tick.

frontend/src/lib/plexPlayerHooks.ts

@@ -73,12 +73,17 @@ export function useFullscreen(wrapRef: RefObject<HTMLElement | null>): {
 // `holdOnHover` is the pointer resting on the chrome: the bar stays while it is there (as on YouTube
 // and Plex Web — E28 F22, it used to fade out from under a mouse parked on Next), and leaving it
 // starts a fresh 3 s. `holdOnFocus` is the same for a KEYBOARD focus in the chrome (E28 review E6): the
-// bar must not fade from under the control a key user is on.
+// bar must not fade from under the control a key user is on — but only for a while after the last
+// key (FOCUS_HOLD_MS). The focus never leaves the bands on its own (Escape hands it back to the ⋯), so
+// a hold without an end kept them over the whole film (round 2, P4); any key wakes them again.
 //
 // On touch (C3) nothing moves a mouse, so the timer is also armed by PLAYBACK starting — before, the
 // bar stayed up until the first tap however long the video played — and a tap on the picture only
 // shows or hides the bar (`toggle`), never pauses. `show(false)` hides at once: a double-tap skip
 // takes back the show/hide its first tap did.
+const HIDE_MS = 3000;
+const FOCUS_HOLD_MS = 10_000;
+
 export function useControlsVisibility(opts: {
   barAutoHideRef: RefObject<boolean>;
   menuOpenRef: RefObject<boolean>;
@@ -105,11 +110,17 @@ export function useControlsVisibility(opts: {
     setVisible(true);
     if (hideTimer.current) window.clearTimeout(hideTimer.current);
     if (!barAutoHideRef.current) return; // per-user setting: never auto-hide the control bar
-    hideTimer.current = window.setTimeout(() => {
-      // Keep the controls up while the audio/subtitle menu is open, else it would vanish mid-choice.
-      if (!videoRef.current?.paused && !menuOpenRef.current && !hovered.current && !focused.current)
+    const wokeAt = Date.now();
+    const arm = (ms: number) => {
+      hideTimer.current = window.setTimeout(() => {
+        // Keep the controls up while the audio/subtitle menu is open, else it would vanish mid-choice.
+        if (videoRef.current?.paused || menuOpenRef.current || hovered.current) return;
+        const held = FOCUS_HOLD_MS - (Date.now() - wokeAt);
+        if (focused.current && held > 0) return arm(held);
         setVisible(false);
-    }, 3000);
+      }, ms);
+    };
+    arm(HIDE_MS);
   }, [barAutoHideRef, menuOpenRef, videoRef, setVisible]);
   const show = useCallback(
     (visible: boolean) => {
@@ -130,8 +141,12 @@ export function useControlsVisibility(opts: {
   );
   const holdOnFocus = useCallback(
     (on: boolean) => {
+      const was = focused.current;
       focused.current = on;
-      if (!on) wake();
+      // Only a hold that ENDS restarts the timer. A tap moving the focus out of the bands (a finger
+      // never holds: its focus is not :focus-visible) re-showed them on its way to the picture, whose
+      // own toggle then hid them again — the tap did nothing on Android (round 2, P3).
+      if (was && !on) wake();
     },
     [wake],
   );