Prod hardening: one-game-per-player, selectable music, bargevasat.ir config

- One running game per player: server rejects a 2nd matchmake while in a live
  room (re-syncs the existing game); client guards Home vs-computer + Lobby
  random/create — resumes the running match + notifies instead of starting another
  (game-store hasActiveMatch()).
- Background music is now selectable: santoor (سنتی, calm Persian loop) and
  playful (bouncy UNO-like) — sound.ts TRACKS + setMusicTrack (persisted),
  sound-store musicTrack, picker in Profile → Audio. i18n added.
- Production config for bargevasat.ir (prepare-only; no live deploy):
  appsettings.Production.example (CORS + ZarinPal + IAB to the domain),
  docker-compose.caddy.yml + Caddyfile (auto-HTTPS reverse proxy
  bargevasat.ir→web, api.bargevasat.ir→server), ENV_FILE PRODUCTION block,
  PRODUCTION.md go-live + Cafe Bazaar publish/IAB checklist. Fixed IAB package
  name to match Capacitor appId (com.bargevasat.app).

Verified: tsc + next build + dotnet build all pass.

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

src/lib/sound.ts

@@ -18,6 +18,9 @@ export type Sfx =
 
 const LS_SFX = "hokm.sfx";
 const LS_MUSIC = "hokm.music";
+const LS_TRACK = "hokm.musicTrack";
+
+export type MusicTrack = "santoor" | "playful";
 
 function loadBool(key: string, def = true): boolean {
   if (typeof window === "undefined") return def;
@@ -34,6 +37,8 @@ class SoundManager {
 
   sfxEnabled = loadBool(LS_SFX);
   musicEnabled = loadBool(LS_MUSIC);
+  musicTrack: MusicTrack =
+    (typeof window !== "undefined" && (localStorage.getItem(LS_TRACK) as MusicTrack)) || "santoor";
 
   /** Must be called from a user gesture to unlock audio. */
   init() {
@@ -70,6 +75,18 @@ class SoundManager {
     }
   }
 
+  /** Switch the background music style; restarts the loop if playing. */
+  setMusicTrack(track: MusicTrack) {
+    this.musicTrack = track;
+    if (typeof window !== "undefined") localStorage.setItem(LS_TRACK, track);
+    this.step = 0;
+    if (this.musicEnabled) {
+      this.stopMusic();
+      this.init();
+      this.startMusic();
+    }
+  }
+
   private tone(
     freq: number,
     start: number,
@@ -147,29 +164,44 @@ class SoundManager {
     }
   }
 
-  // Gentle ambient loop on a Persian-flavored scale (Dastgah-ish).
-  private MUSIC = [293.66, 311.13, 392, 440, 466.16, 392, 311.13, 293.66];
+  // Two selectable loops:
+  //  • santoor — calm Persian-flavored (Dastgah-ish) legato loop with fifth harmony.
+  //  • playful — bouncy major-pentatonic staccato loop (UNO-like).
+  private TRACKS: Record<
+    MusicTrack,
+    { notes: number[]; gap: number; type: OscillatorType; attack: number; dur: number; peak: number; fifth: boolean }
+  > = {
+    santoor: {
+      notes: [293.66, 311.13, 392, 440, 466.16, 392, 311.13, 293.66],
+      gap: 900, type: "sine", attack: 0.3, dur: 1.6, peak: 0.5, fifth: true,
+    },
+    playful: {
+      notes: [523.25, 659.25, 784, 659.25, 587.33, 698.46, 880, 698.46, 587.33, 523.25],
+      gap: 360, type: "triangle", attack: 0.02, dur: 0.34, peak: 0.4, fifth: false,
+    },
+  };
 
   startMusic() {
     if (!this.musicEnabled || this.musicTimer || !this.ctx || !this.musicGain) return;
     const playNote = () => {
       if (!this.ctx || !this.musicGain) return;
-      const freq = this.MUSIC[this.step % this.MUSIC.length];
+      const cfg = this.TRACKS[this.musicTrack];
+      const freq = cfg.notes[this.step % cfg.notes.length];
       this.step++;
       const osc = this.ctx.createOscillator();
       const g = this.ctx.createGain();
       const t = this.ctx.currentTime;
-      osc.type = "sine";
+      osc.type = cfg.type;
       osc.frequency.value = freq;
       g.gain.setValueAtTime(0.0001, t);
-      g.gain.exponentialRampToValueAtTime(0.5, t + 0.3);
-      g.gain.exponentialRampToValueAtTime(0.0001, t + 1.6);
+      g.gain.exponentialRampToValueAtTime(cfg.peak, t + cfg.attack);
+      g.gain.exponentialRampToValueAtTime(0.0001, t + cfg.dur);
       osc.connect(g);
       g.connect(this.musicGain);
       osc.start(t);
-      osc.stop(t + 1.7);
-      // soft fifth harmony every other note
-      if (this.step % 2 === 0) {
+      osc.stop(t + cfg.dur + 0.1);
+      // soft fifth harmony (santoor) every other note
+      if (cfg.fifth && this.step % 2 === 0) {
         const o2 = this.ctx.createOscillator();
         const g2 = this.ctx.createGain();
         o2.type = "sine";
@@ -184,7 +216,7 @@ class SoundManager {
       }
     };
     playNote();
-    this.musicTimer = setInterval(playNote, 900);
+    this.musicTimer = setInterval(playNote, this.TRACKS[this.musicTrack].gap);
   }
 
   stopMusic() {