fix: show legacy badge dialog and restore cliparts on import

- Add BadgeLoaderHelper.isLegacyBadge() to detect badges missing
  original text (created before BadgeTextStorage was introduced)
- Show AlertDialog on edit attempt for legacy badges, offering a
  'Create New' option instead of opening a broken editor session
- Add legacyBadgeTitle, legacyBadgeMessage and createNew keys to
  app_en.arb for full i18n support

Closes #1769

Author: xar43

lib/bademagic_module/utils/badge_loader_helper.dart

@@ -10,6 +10,16 @@ import 'package:path_provider/path_provider.dart';
 /// Helper class for loading and parsing badge data and original text from disk.
 /// This class centralizes logic-heavy operations for badge editing, keeping UI code clean and testable.
 class BadgeLoaderHelper {
+  /// Checks if a badge is a legacy badge (no stored original text).
+  ///
+  /// [badgeFilename] is the filename of the badge JSON.
+  static Future<bool> isLegacyBadge(String badgeFilename) async {
+    final textFilename =
+        badgeFilename.endsWith('.json') ? badgeFilename : '$badgeFilename.json';
+    final text = await BadgeTextStorage.getOriginalText(textFilename);
+    return text.isEmpty;
+  }
+
   /// Loads badge data and original text from disk for editing.
   ///
   /// [badgeFilename] is the filename of the badge JSON (with or without .json extension).

lib/l10n/app_en.arb

@@ -232,5 +232,8 @@
   "shareQrImage": "Share QR image",
   "couldNotGenerateQrImage": "Could not generate QR image.",
   "couldNotShareQrImage": "Could not share QR image.",
-  "qrShareInstruction": "Scan this code from another device, or tap share to send the QR image."
+  "qrShareInstruction": "Scan this code from another device, or tap share to send the QR image.",
+  "legacyBadgeTitle": "Old Badge Format",
+  "legacyBadgeMessage": "This badge was created with an older version of the app and cannot be edited directly. Please create a new badge and recreate your design.",
+  "createNew": "Create New"
 }

lib/view/widgets/save_badge_card.dart

@@ -1,4 +1,5 @@
 import 'package:badgemagic/bademagic_module/models/speed.dart';
+import 'package:badgemagic/bademagic_module/utils/badge_loader_helper.dart';
 import 'package:badgemagic/bademagic_module/utils/byte_array_utils.dart';
 import 'package:badgemagic/bademagic_module/utils/converters.dart';
 import 'package:badgemagic/bademagic_module/utils/file_helper.dart';
@@ -109,11 +110,46 @@ class SaveBadgeCard extends StatelessWidget {
                       ),
                       onPressed: () async {
                         final navigator = Navigator.of(context);
-                        // Show confirmation dialog before editing
+                        final l10n =
+                            GetIt.instance.get<LocalizationService>().l10n;
+
+                        // Check if this is a legacy badge (no stored text).
+                        final isLegacy = await BadgeLoaderHelper.isLegacyBadge(
+                            badgeData.key);
+                        if (isLegacy) {
+                          if (!context.mounted) return;
+                          await showDialog<void>(
+                            context: context,
+                            builder: (ctx) => AlertDialog(
+                              title: Text(l10n.legacyBadgeTitle),
+                              content: Text(l10n.legacyBadgeMessage),
+                              actions: [
+                                TextButton(
+                                  onPressed: () => Navigator.pop(ctx),
+                                  child: Text(l10n.cancel),
+                                ),
+                                TextButton(
+                                  onPressed: () {
+                                    Navigator.pop(ctx);
+                                    navigator.push(
+                                      MaterialPageRoute(
+                                        builder: (_) => const HomeScreen(),
+                                      ),
+                                    );
+                                  },
+                                  child: Text(l10n.createNew),
+                                ),
+                              ],
+                            ),
+                          );
+                          return;
+                        }
+
+                        // Modern badge — show confirmation then open editor.
+                        if (!context.mounted) return;
                         final confirmed =
                             await provider.showEditBadgeConfirmation(context);
                         if (confirmed) {
-                          // Navigate to HomeScreen for editing the badge
                           navigator.push(
                             MaterialPageRoute(
                               builder: (context) => HomeScreen(