Three player/overlay interaction fixes (PlexPlayer changes share a file, hence one
commit):
- U-C (Escape double-close): useDismiss's Escape now stopPropagation()s (its document
listener bubbles before a player's window listener, so one Escape closes only the
popover, not the popover AND the player). Modal exports modalCount(); both players'
Escape defers when a Modal is open above them, so Escape closes the dialog, not the
player under it and then the dialog.
- U-3.1.4: PlexPlayer's Space now defers to a focused BUTTON/A (e.g. "Skip intro")
instead of toggling playback — matching PlayerModal.
- U-3.3.12: the audio/subtitle menus used theme-adaptive glass-menu + forced
text-white (white-on-white in light theme); they now use the player's own explicit
dark panel (border-white/15 + bg-neutral-900/95), readable in both themes.