fix: add HMR guard to prevent ConcurrentCallError on SDK double-init

При HMR Vite перевыполняет main.tsx, вызывая повторный init() и mount*()
компонентов SDK. mountThemeParams() и другие бросают ConcurrentCallError
асинхронно, что не ловится синхронным try/catch.

Решение: флаг на window.__tg_sdk_initialized предотвращает повторную
инициализацию при горячей перезагрузке модуля.

src/main.tsx

@@ -26,35 +26,51 @@ import { getCachedFullscreenEnabled, isTelegramMobile } from './hooks/useTelegra
 import './i18n';
 import './styles/globals.css';
 
-// Safe mount helper — ignores "already mounted/mounting" errors (HMR, StrictMode)
-function safeMountSync(fn: () => void) {
-  try {
-    fn();
-  } catch {
-    // Already mounted or not available
-  }
-}
+// HMR guard — prevent double init when Vite hot-reloads the module
+const HMR_KEY = '__tg_sdk_initialized';
+const alreadyInitialized = (window as unknown as Record<string, unknown>)[HMR_KEY] === true;
+
+if (!alreadyInitialized) {
+  (window as unknown as Record<string, unknown>)[HMR_KEY] = true;
 
-// Initialize Telegram SDK v3
   try {
     init();
     restoreInitData();
 
-  safeMountSync(() => mountMiniApp());
-  safeMountSync(() => {
+    // Mount components — each in its own try/catch so one failure doesn't block others
+    try {
+      mountMiniApp();
+    } catch {
+      /* already mounted */
+    }
+    try {
       mountThemeParams();
       bindThemeParamsCssVars();
-  });
-  safeMountSync(() => {
+    } catch {
+      /* already mounted */
+    }
+    try {
       mountSwipeBehavior();
       disableVerticalSwipes();
-  });
-  safeMountSync(() => {
+    } catch {
+      /* already mounted */
+    }
+    try {
       mountClosingBehavior();
       disableClosingConfirmation();
-  });
-  safeMountSync(() => mountBackButton());
-  safeMountSync(() => mountMainButton());
+    } catch {
+      /* already mounted */
+    }
+    try {
+      mountBackButton();
+    } catch {
+      /* already mounted */
+    }
+    try {
+      mountMainButton();
+    } catch {
+      /* already mounted */
+    }
 
     // Viewport — async, fullscreen зависит от смонтированного viewport
     mountViewport()
@@ -75,6 +91,7 @@ try {
   } catch {
     // Not in Telegram — ok
   }
+}
 
 // Preload logo from cache immediately on page load
 initLogoPreload();