feat: better backup errors (#2290)

Instead of creating error reports show the error to user
use BackupVersion.unknown

lib/core/backup_service_v3.dart

@@ -177,7 +177,7 @@ class BackupServiceV3 extends $BackupService {
         final archive = ZipDecoder().decodeStream(inputStream);
         final metadataFile = archive.findFile('metadata.json');
         if (metadataFile == null) {
-          throw Exception('Invalid v3 backup: missing metadata.json');
+          return BackupVersion.unknown;
         }
         final metadataBytes = metadataFile.rawContent!.readBytes();
         final metadataString = utf8.decode(metadataBytes);
@@ -188,7 +188,7 @@ class BackupServiceV3 extends $BackupService {
         }
       }
 
-      throw Exception('Invalid backup file: unknown version');
+      return BackupVersion.unknown;
     } finally {
       raf.closeSync();
     }

lib/src/screens/restore/restore_from_backup_page.dart

@@ -173,8 +173,19 @@ class RestoreFromBackupPage extends BasePage {
 
       return;
     }
-
-    await restoreFromBackupViewModel.import(textEditingController.text);
+    try {
+      await restoreFromBackupViewModel.import(textEditingController.text);
+    } catch (e) {
+      await showPopUp<void>(
+        context: context,
+        builder: (_) {
+          return AlertWithOneAction(
+              alertTitle: S.current.error,
+              alertContent: e.toString(),
+              buttonText: S.of(context).ok,
+              buttonAction: () => Navigator.of(context).pop());
+        });
+    }
     textEditingController.text = '';
   }
 }

lib/view_model/restore_from_backup_view_model.dart

@@ -45,12 +45,11 @@ abstract class RestoreFromBackupViewModelBase with Store {
 
       try {
         await backupService.importBackupFile(file, password);
-      } catch (e, s) {
+      } catch (e) {
         if (e.toString().contains("unknown_backup_version")) {
-          state = FailureState('This is not a valid backup file, please make sure you selected the correct backup file');
+          state = FailureState('This is not a valid backup file, please make sure you have selected the correct one');
         } else {
-          state = FailureState('Failed to restore backup, please try again');
-          ExceptionHandler.onError(FlutterErrorDetails(exception: e, stack: s));
+          state = FailureState(e.toString());
         }
       }