Brand the app as «برگ وسط» / Barg-e Vasat

- Name + tagline («بازی حکم آنلاین») across i18n (app.title/subtitle),
  layout metadata, PWA manifest, app icon, package name, server health
- Gameplay term «حکم» unchanged; repo/folder stay hokm/HokmPlay

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

server/src/Hokm.Server/Program.cs

@@ -70,7 +70,7 @@ app.UseCors();
 app.UseAuthentication();
 app.UseAuthorization();
 
-app.MapGet("/", () => Results.Json(new { service = "Hokm SignalR server", status = "ok" }));
+app.MapGet("/", () => Results.Json(new { service = "Barg-e Vasat SignalR server", status = "ok" }));
 app.MapGet("/api/stats/online", (GameManager m) => Results.Json(new { online = m.OnlineCount }));
 
 // --- dev auth (mock OTP + email). Replace with the V2 Identity Service later. ---