refactor(player-bar): H7 — split PlayerBar.tsx 802 → 354 LOC across 10 files (#670)

* refactor(player-bar): H7 — extract PlaybackTime + RemainingTime + formatTime

The two memoized clock components (which update the DOM imperatively from
the playbackProgress store without re-rendering PlayerBar) move into
components/playerBar/PlaybackClock.tsx. formatTime helper → utils/playerBarHelpers.ts.

PlayerBar.tsx: 802 → 765 LOC.

* refactor(player-bar): H7 — extract PlayerTrackInfo

The cover-art wrap + title/artist marquees + star + last.fm love buttons
move into their own component. The new file uses PlayerState['openContextMenu']
for prop typing so the union literal type carries through.

PlayerBar.tsx: 765 → 674 LOC.

* refactor(player-bar): H7 — extract PlayerTransportControls

Stop/Prev/Play/Next/Repeat buttons (with the preview-ring + schedule-badge
overlays around play/pause) move into PlayerTransportControls.tsx. The
component uses ReturnType<...> on the source hooks to derive its
playPauseBind + scheduleRemaining prop types so the new file stays in lockstep
with usePlaybackDelayPress + usePlaybackScheduleRemaining.

PlayerBar.tsx: 674 → 621 LOC.

* refactor(player-bar): H7 — extract PlayerSeekbarSection

The waveform / radio progress / time-label block moves into its own
component. PlayerSeekbarSection branches on isRadio (AzuraCast progress
bar with elapsed+duration when available; LIVE badge otherwise) vs.
regular track (WaveformSeek or perf-flag fallback + duration ↔ remaining
toggle).

PlayerBar.tsx: 621 → 582 LOC.

* refactor(player-bar): H7 — extract PlayerVolume + PlayerOverflowMenu + 2 hooks

PlayerVolume.tsx is the reusable volume button + slider combo, used in
three layouts (inline, full menu, volume-only menu) — `inputId` /
`sectionModifier` / `wrapModifier` props handle the variants without
class duplication. PlayerOverflowMenu.tsx is the portaled Ellipsis-button
menu that hosts EQ / mini-player buttons + a PlayerVolume instance.

useFloatingPlayerBar owns the docked/floating layout computation
(ResizeObserver on sidebar + queue panel). useUtilityOverflowMenu owns
the overflow detection, menu open/mode state, close-on-outside-click /
Escape, position recompute on resize/scroll, and the wheel-menu timer.

PlayerBar.tsx: 582 → 354 LOC.

src/hooks/useFloatingPlayerBar.ts

@@ -0,0 +1,46 @@
+import React, { useEffect, useState } from 'react';
+
+/** Computes the floating player-bar position based on the current sidebar +
+ *  queue panel widths. Returns an inline-style object (left/right/width); only
+ *  active when `floatingPlayerBar` is true. Uses a ResizeObserver on both
+ *  containers so the bar slides while the sidebar or queue is resized. */
+export function useFloatingPlayerBar(
+  _playerBarRef: React.RefObject<HTMLElement | null>,
+  floatingPlayerBar: boolean,
+): React.CSSProperties {
+  const [floatingStyle, setFloatingStyle] = useState<React.CSSProperties>({});
+
+  useEffect(() => {
+    if (!floatingPlayerBar) return;
+
+    const updatePosition = () => {
+      const sidebar = document.querySelector('.sidebar') as HTMLElement;
+      const queue = document.querySelector('.queue-panel') as HTMLElement;
+
+      const leftOffset = sidebar ? sidebar.getBoundingClientRect().right : 0;
+      const rightOffset = queue ? window.innerWidth - queue.getBoundingClientRect().left : 0;
+
+      setFloatingStyle({
+        left: leftOffset + 24,
+        right: rightOffset + 24,
+        width: 'auto',
+      });
+    };
+
+    updatePosition();
+
+    const observer = new ResizeObserver(updatePosition);
+    const sidebar = document.querySelector('.sidebar');
+    const queue = document.querySelector('.queue-panel');
+    if (sidebar) observer.observe(sidebar);
+    if (queue) observer.observe(queue);
+    window.addEventListener('resize', updatePosition);
+
+    return () => {
+      observer.disconnect();
+      window.removeEventListener('resize', updatePosition);
+    };
+  }, [floatingPlayerBar]);
+
+  return floatingStyle;
+}