fix: strip playback menu accelerators while command palette is open (#2055)

On macOS, menu item accelerators (e.g. Space for Play/Pause) fire even
when an input has focus, bypassing the renderer-side useHotkeys guard
added in #1925. Typing a space character in the command palette search
toggled play/pause instead of inserting a space.

Track command palette open state in the main process via IPC. When the
palette is open, rebuild the application menu with empty playback
accelerators so single-key shortcuts no longer intercept keystrokes
intended for the search input. Restore accelerators when the palette
closes.

Co-authored-by: Jack McCrea <jack@MacBookPro.lan>

src/main/index.ts

@@ -280,6 +280,16 @@ let currentRepeatMode: PlayerRepeat = PlayerRepeat.NONE;
 let currentSidebarCollapsed = false;
 let currentShuffleEnabled = false;
 let playbackMenuAccelerators: MenuPlaybackState['accelerators'] = {};
+let commandPaletteOpen = false;
+
+ipcMain.on('command-palette-state', (_event, opened: boolean) => {
+    const next = !!opened;
+    if (commandPaletteOpen === next) return;
+    commandPaletteOpen = next;
+    if (isMacOS()) {
+        rebuildMainMenu();
+    }
+});
 
 if (process.env.NODE_ENV === 'production') {
     import('source-map-support').then((sourceMapSupport) => {
@@ -340,7 +350,7 @@ const rebuildMainMenu = () => {
     if (!menuBuilder || !mainWindow) return;
 
     menuBuilder.buildMenu({
-        accelerators: playbackMenuAccelerators,
+        accelerators: commandPaletteOpen ? {} : playbackMenuAccelerators,
         playbackStatus: currentPlaybackStatus,
         privateMode: currentPrivateMode,
         repeatMode: currentRepeatMode,