simplified code across the app and consolidated duplicated helpers

lib/widget/avatar_actions_sheet.dart

@@ -1,7 +1,6 @@
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
-import 'package:image_picker/image_picker.dart';
 
 import '../routing/app_routes.dart';
 import 'details_bottom_sheet.dart';
@@ -36,31 +35,11 @@ Future<AvatarSheetResult?> showAvatarActionsSheet(
   await showDetailsBottomSheet(
     context,
     children: (sheetContext) => [
-      ListTile(
-        leading: const Icon(Icons.photo_library_outlined),
-        title: const Text('Aus Galerie wählen'),
-        onTap: () async {
-          final bytes = await _pickAndCrop(
-            sheetContext,
-            () => FilePick.singleGalleryPick(sheetContext, forCrop: true),
-          );
-          if (bytes == null || !sheetContext.mounted) return;
-          result = AvatarUploadResult(bytes);
-          Navigator.of(sheetContext).pop();
-        },
-      ),
-      ListTile(
-        leading: const Icon(Icons.photo_camera_outlined),
-        title: const Text('Foto aufnehmen'),
-        onTap: () async {
-          final bytes = await _pickAndCrop(
-            sheetContext,
-            () => FilePick.cameraPick(sheetContext, forCrop: true),
-          );
-          if (bytes == null || !sheetContext.mounted) return;
-          result = AvatarUploadResult(bytes);
-          Navigator.of(sheetContext).pop();
-        },
+      ...imageSourceTiles(
+        sheetContext,
+        transform: (bytes) =>
+            AppRoutes.openAvatarCrop(sheetContext, imageBytes: bytes),
+        onPicked: (bytes) => result = AvatarUploadResult(bytes),
       ),
       if (allowRemove) ...[
         const Divider(),
@@ -83,14 +62,3 @@ Future<AvatarSheetResult?> showAvatarActionsSheet(
   );
   return result;
 }
-
-Future<Uint8List?> _pickAndCrop(
-  BuildContext context,
-  Future<XFile?> Function() pick,
-) async {
-  final picked = await pick();
-  if (picked == null) return null;
-  final bytes = await picked.readAsBytes();
-  if (!context.mounted) return null;
-  return AppRoutes.openAvatarCrop(context, imageBytes: bytes);
-}