fix(auth): различать устаревшего бота и ненастроенного на экране логина

src/components/TelegramLoginButton.tsx

@@ -9,6 +9,7 @@ import { useAuthStore } from '../store/auth';
 import { useNavigate } from 'react-router';
 import { getPendingCampaignSlug } from '../utils/campaign';
 import { copyToClipboard } from '../utils/clipboard';
+import { isEndpointMissingError } from '../utils/api-error';
 
 interface TelegramLoginButtonProps {
   referralCode?: string;
@@ -159,7 +160,6 @@ export default function TelegramLoginButton({ referralCode }: TelegramLoginButto
     isOIDC,
     widgetConfig?.oidc_client_id,
     widgetConfig?.request_access,
-    t,
     scriptLoaded,
     handleScriptFailed,
   ]);
@@ -330,8 +330,9 @@ export default function TelegramLoginButton({ referralCode }: TelegramLoginButto
         },
         (expires_in || 300) * 1000,
       );
-    } catch {
-      setDeepLinkError(t('common.error'));
+    } catch (err) {
+      // 404 = the deep-link auth routes don't exist on this bot build (< v3.33.0)
+      setDeepLinkError(t(isEndpointMissingError(err) ? 'auth.botOutdated' : 'common.error'));
     }
   }, [botUsername, loginWithDeepLink, navigate, t]);
 
@@ -421,9 +422,11 @@ export default function TelegramLoginButton({ referralCode }: TelegramLoginButto
   }, [deepLinkPolling, deepLinkToken, loginWithDeepLink, navigate, t]);
 
   if (!botUsername || botUsername === 'your_bot') {
+    // 404 on the config route = the bot build predates the cabinet endpoints,
+    // which reads as "not configured" but is actually a version mismatch (#345).
     return (
       <div className="py-4 text-center text-sm text-dark-400">
-        {t('auth.telegramNotConfigured')}
+        {t(widgetConfig?.endpoint_missing ? 'auth.botOutdated' : 'auth.telegramNotConfigured')}
       </div>
     );
   }