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/i18n.tsx

@@ -321,6 +321,9 @@ const fa: Dict = {
   "settings.audio": "تنظیمات صدا",
   "settings.sound": "افکت صدا",
   "settings.music": "موسیقی پس‌زمینه",
+  "settings.musicStyle": "سبک موسیقی",
+  "settings.trackSantoor": "سنتی (سنتور)",
+  "settings.trackPlayful": "شاد",
 
   "profile.cardFront": "روی کارت",
   "profile.cardBack": "پشت کارت",
@@ -648,6 +651,9 @@ const en: Dict = {
   "settings.audio": "Audio",
   "settings.sound": "Sound effects",
   "settings.music": "Background music",
+  "settings.musicStyle": "Music style",
+  "settings.trackSantoor": "Traditional (Santoor)",
+  "settings.trackPlayful": "Playful",
 
   "profile.cardFront": "Card front",
   "profile.cardBack": "Card back",