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/components/screens/OnlineLobbyScreen.tsx

@@ -9,9 +9,27 @@ import { MATCH_LEAGUES, leagueById } from "@/lib/online/gamification";
 import { useOnlineStore } from "@/lib/online-store";
 import { useSessionStore } from "@/lib/session-store";
 import { useUIStore } from "@/lib/ui-store";
+import { useGameStore, hasActiveMatch } from "@/lib/game-store";
+import { pushNotification } from "@/lib/notification-store";
 import { useI18n } from "@/lib/i18n";
 import { cn } from "@/lib/cn";
 
+/** Block starting a 2nd game while one is running — resume it instead. */
+function guardActiveMatch(): boolean {
+  if (!hasActiveMatch()) return false;
+  useGameStore.getState().resume();
+  useUIStore.getState().goGame("online");
+  pushNotification({
+    kind: "system",
+    titleFa: "بازی در جریان",
+    titleEn: "Game in progress",
+    bodyFa: "ابتدا بازی فعلی را تمام کنید یا تسلیم شوید.",
+    bodyEn: "Finish or forfeit your current game first.",
+    icon: "🎮",
+  });
+  return true;
+}
+
 export function OnlineLobbyScreen() {
   const { t, locale } = useI18n();
   const createRoom = useOnlineStore((s) => s.createRoom);
@@ -27,12 +45,14 @@ export function OnlineLobbyScreen() {
 
   // Private rooms with friends are free.
   const onCreate = async () => {
+    if (guardActiveMatch()) return;
     await createRoom({ targetScore: 7, stake: 0, ranked: false });
     go("room");
   };
 
   // Ranked random always costs the entry (you stake it).
   const onRandom = async () => {
+    if (guardActiveMatch()) return;
     if (lockedLeague) return;
     if (coins < entry) {
       go("buycoins");