Music mute everywhere + card-draw SFX

- MusicToggle: global floating button (enable/disable music from any screen;
  hidden on the table, which has its own audio control in its HUD). Uses
  sound-store toggleMusic.
- Card sounds now use a synthesized card-draw "swish" (filtered noise burst with
  a downward sweep) for cardPlay (+ soft landing tap) and deal (a flurry),
  replacing the old beep tones.

Verified: tsc + next build pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/page.tsx

@@ -20,6 +20,7 @@ import { DailyRewardModal } from "@/components/online/DailyRewardModal";
 import { NotificationToaster } from "@/components/online/NotificationToaster";
 import { ResumeGameBar } from "@/components/online/ResumeGameBar";
 import { CelebrationOverlay } from "@/components/online/CelebrationOverlay";
+import { MusicToggle } from "@/components/online/MusicToggle";
 import { PublicProfileModal } from "@/components/online/PublicProfileModal";
 import { CapacitorBack } from "@/components/CapacitorBack";
 import { useSessionStore } from "@/lib/session-store";
@@ -171,6 +172,7 @@ export default function Page() {
       <NotificationToaster />
       <ResumeGameBar />
       <CelebrationOverlay />
+      <MusicToggle />
       <PublicProfileModal />
       <CapacitorBack />
       {loading && null}