feat(app): 按错误码展示中英印尼文案

lib/pages/auth/phone_auth_sheet.dart

@@ -8,6 +8,7 @@ import 'package:provider/provider.dart';
 
 import '../../core/data/remote/api_client.dart';
 import '../../core/data/services/auth_controller.dart';
+import '../../core/formatting/error_text.dart';
 import '../../core/platform/haptics.dart';
 import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
@@ -180,7 +181,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
       ).showSnackBar(SnackBar(content: Text(l10n.authCodeSent)));
       _codeFocus.requestFocus();
     } on ApiException catch (error) {
-      failureMessage = error.message;
+      failureMessage = userFacingApiMessage(l10n, error.code, error.message);
     } catch (_) {
       failureMessage = l10n.authNetworkError;
     } finally {
@@ -228,7 +229,7 @@ class _PhoneAuthSheetState extends State<PhoneAuthSheet> {
       }
       if (mounted) Navigator.of(context).pop(true);
     } on ApiException catch (error) {
-      failureMessage = error.message;
+      failureMessage = userFacingApiMessage(l10n, error.code, error.message);
     } catch (_) {
       failureMessage = l10n.authNetworkError;
     } finally {