simplified code across the app and consolidated duplicated helpers

lib/widget/file_pick.dart

@@ -4,7 +4,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:image_picker/image_picker.dart';
 
-import '../api/errors/error_mapper.dart';
 import '../api/errors/permission_exception.dart';
 import 'confirm_dialog.dart';
 import 'info_dialog.dart';
@@ -86,12 +85,45 @@ class FilePick {
     onConfirm: AppSettings.openAppSettings,
   ).asDialog(context);
 
-  static void _showErrorDialog(BuildContext context, Object error) {
-    final message = errorToUserMessage(error);
-    final details = errorToTechnicalDetails(error);
-    final body = details != null && details != message
-        ? '$message\n\n$details'
-        : message;
-    InfoDialog.show(context, body, copyable: true, title: 'Fehler');
-  }
+  static void _showErrorDialog(BuildContext context, Object error) =>
+      InfoDialog.showError(context, error);
+}
+
+/// "Aus Galerie wählen" / "Foto aufnehmen" tiles for an image-source sheet.
+/// The optional [transform] (e.g. a cropper) runs with the sheet still
+/// mounted; the sheet pops only once [onPicked] received the final bytes.
+List<Widget> imageSourceTiles(
+  BuildContext sheetContext, {
+  required void Function(Uint8List bytes) onPicked,
+  Future<Uint8List?> Function(Uint8List bytes)? transform,
+}) {
+  Widget tile(IconData icon, String title, Future<XFile?> Function() pick) =>
+      ListTile(
+        leading: Icon(icon),
+        title: Text(title),
+        onTap: () async {
+          final picked = await pick();
+          if (picked == null) return;
+          Uint8List? bytes = await picked.readAsBytes();
+          if (transform != null) {
+            if (!sheetContext.mounted) return;
+            bytes = await transform(bytes);
+          }
+          if (bytes == null || !sheetContext.mounted) return;
+          onPicked(bytes);
+          Navigator.of(sheetContext).pop();
+        },
+      );
+  return [
+    tile(
+      Icons.photo_library_outlined,
+      'Aus Galerie wählen',
+      () => FilePick.singleGalleryPick(sheetContext, forCrop: true),
+    ),
+    tile(
+      Icons.photo_camera_outlined,
+      'Foto aufnehmen',
+      () => FilePick.cameraPick(sheetContext, forCrop: true),
+    ),
+  ];
 }