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/lib/sound.ts

@@ -115,6 +115,32 @@ class SoundManager {
     notes.forEach(([freq, dur], i) => this.tone(freq, t0 + i * gap, dur, opts));
   }
 
+  /** Filtered noise burst with a downward sweep — a card "swish" / draw sound. */
+  private swish(start: number, dur = 0.13, opts: { gain?: number; from?: number; to?: number } = {}) {
+    if (!this.ctx || !this.master) return;
+    const ctx = this.ctx;
+    const buf = ctx.createBuffer(1, Math.ceil(ctx.sampleRate * dur), ctx.sampleRate);
+    const data = buf.getChannelData(0);
+    for (let i = 0; i < data.length; i++) data[i] = Math.random() * 2 - 1;
+    const src = ctx.createBufferSource();
+    src.buffer = buf;
+    const bp = ctx.createBiquadFilter();
+    bp.type = "bandpass";
+    bp.Q.value = 0.9;
+    bp.frequency.setValueAtTime(opts.from ?? 3200, start);
+    bp.frequency.exponentialRampToValueAtTime(opts.to ?? 900, start + dur);
+    const g = ctx.createGain();
+    const peak = opts.gain ?? 0.28;
+    g.gain.setValueAtTime(0.0001, start);
+    g.gain.exponentialRampToValueAtTime(peak, start + 0.008);
+    g.gain.exponentialRampToValueAtTime(0.0001, start + dur);
+    src.connect(bp);
+    bp.connect(g);
+    g.connect(this.master);
+    src.start(start);
+    src.stop(start + dur + 0.02);
+  }
+
   play(name: Sfx) {
     if (!this.sfxEnabled) return;
     this.init();
@@ -125,11 +151,14 @@ class SoundManager {
         this.tone(520, t, 0.06, { type: "square", gain: 0.12 });
         break;
       case "cardPlay":
-        this.tone(360, t, 0.09, { type: "triangle", gain: 0.18, to: 220 });
+        // Draw-card swish + a soft low tap as it lands on the felt.
+        this.swish(t, 0.13, { gain: 0.3, from: 3200, to: 800 });
+        this.tone(150, t + 0.08, 0.06, { type: "sine", gain: 0.12, to: 90 });
         break;
       case "deal":
+        // A flurry of card-draw swishes (dealing).
         for (let i = 0; i < 4; i++)
-          this.tone(320 + i * 20, t + i * 0.08, 0.07, { type: "triangle", gain: 0.14, to: 200 });
+          this.swish(t + i * 0.1, 0.1, { gain: 0.22, from: 3400, to: 1000 });
         break;
       case "trump":
         this.seq([[440, 0.12], [660, 0.18]], 0.1, { type: "sine", gain: 0.25 });