모바일 로그인창 테스트 강화

userfront/lib/features/auth/presentation/login_screen.dart

@@ -1781,7 +1781,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen>
                           style: theme.textTheme.headlineMedium?.copyWith(
                             fontSize: 34,
                             fontWeight: FontWeight.w800,
-                            letterSpacing: -0.7,
+                            letterSpacing: 0,
                           ),
                           textAlign: TextAlign.center,
                         ),