feat: cleaning code

lib/feature/auth/presentation/screen/otp_screen.dart

@@ -109,7 +109,7 @@ class _OtpScreenState extends State<OtpScreen> {
                           GameButton(
                             label: 'ورود',
                             width: double.infinity,
-                            colors: const [Color(0xFF3FA34D), Color(0xFF1B5E20)],
+                            colors: const [AppColors.success, AppColors.successDark],
                             onTap: (!_valid || loading)
                                 ? null
                                 : () => _submit(context),

lib/feature/auth/presentation/screen/profile_setup_screen.dart

@@ -124,7 +124,7 @@ class _ProfileSetupScreenState extends State<ProfileSetupScreen> {
                           GameButton(
                             label: saving ? 'در حال ذخیره…' : 'تأیید و ورود',
                             width: double.infinity,
-                            colors: const [Color(0xFF3FA34D), Color(0xFF1B5E20)],
+                            colors: const [AppColors.success, AppColors.successDark],
                             onTap: (!_valid || saving)
                                 ? null
                                 : () => context.read<AuthBloc>().add(