simplified code across the app and consolidated duplicated helpers

lib/view/pages/files/files.dart

@@ -11,10 +11,10 @@ import '../../../state/app/infrastructure/loadable_state/view/loadable_state_con
 import '../../../state/app/infrastructure/utility_widgets/bloc_module.dart';
 import '../../../state/app/modules/files/bloc/files_bloc.dart';
 import '../../../state/app/modules/files/bloc/files_state.dart';
-import '../../../state/app/modules/settings/bloc/settings_cubit.dart';
 import '../../../utils/cache_invalidation_bus.dart';
 import '../../../widget/placeholder_view.dart';
-import 'data/sort_options.dart';
+import 'data/file_sort.dart';
+import 'data/webdav_path.dart';
 import 'files_upload_dialog.dart';
 import 'search/files_search_delegate.dart';
 import 'widgets/add_file_menu.dart';
@@ -44,9 +44,6 @@ class _FilesView extends StatefulWidget {
 }
 
 class _FilesViewState extends State<_FilesView> {
-  late final SettingsCubit settings;
-  late SortOption currentSort;
-  late bool currentSortDirection;
   late final StreamSubscription<String> _invalidationSub;
 
   // The list builder also runs for loading flips and parent rebuilds; only a
@@ -54,32 +51,16 @@ class _FilesViewState extends State<_FilesView> {
   Object? _sortedKey;
   List<CacheableFile> _sortedFiles = const [];
 
-  List<CacheableFile> _sorted(ListFilesResponse listing, bool foldersToTop) {
-    final key = (listing, currentSort, currentSortDirection, foldersToTop);
+  List<CacheableFile> _sorted(ListFilesResponse listing, FileSort sort) {
+    final key = (listing, sort);
     if (key == _sortedKey) return _sortedFiles;
     _sortedKey = key;
-    return _sortedFiles = listing.sortBy(
-      sortOption: currentSort,
-      foldersToTop: foldersToTop,
-      reversed: currentSortDirection,
-    );
+    return _sortedFiles = listing.sortedBy(sort);
   }
 
-  // Cache key in FilesBloc's pathString format: '/' for root, otherwise
-  // segments joined without leading/trailing slash.
-  String get _myPathString => widget.path.isEmpty ? '/' : widget.path.join('/');
-
-  // Relative folder path matching the WebDAV format used by `CacheableFile.path`
-  // (no leading slash; trailing slash for non-root). Empty string means root.
-  String get _currentFolderPath =>
-      widget.path.isEmpty ? '' : '${widget.path.join('/')}/';
-
   @override
   void initState() {
     super.initState();
-    settings = context.read<SettingsCubit>();
-    currentSort = settings.val().fileSettings.sortBy;
-    currentSortDirection = settings.val().fileSettings.ascending;
     _invalidationSub = CacheInvalidationBus.listFilesStream.listen(
       _onInvalidation,
     );
@@ -87,7 +68,7 @@ class _FilesViewState extends State<_FilesView> {
 
   void _onInvalidation(String invalidatedPath) {
     if (!mounted) return;
-    if (invalidatedPath != _myPathString) return;
+    if (invalidatedPath != listFilesCacheKey(widget.path)) return;
     context.read<FilesBloc>().refresh();
   }
 
@@ -118,29 +99,12 @@ class _FilesViewState extends State<_FilesView> {
     final bloc = context.read<FilesBloc>();
     // Selected here, not in the LoadableStateConsumer child: that closure runs
     // during the consumer's build, where this context may not subscribe.
-    final foldersToTop = context.select(
-      (SettingsCubit c) => c.state.fileSettings.sortFoldersToTop,
-    );
+    final sort = context.select(fileSortOf);
     return Scaffold(
       appBar: AppBar(
         title: Text(widget.path.isNotEmpty ? widget.path.last : 'Dateien'),
         actions: [
-          FilesSortActions(
-            currentSort: currentSort,
-            ascending: currentSortDirection,
-            onDirectionChanged: (e) {
-              setState(() {
-                currentSortDirection = e;
-                settings.val(write: true).fileSettings.ascending = e;
-              });
-            },
-            onSortChanged: (e) {
-              setState(() {
-                currentSort = e;
-                settings.val(write: true).fileSettings.sortBy = e;
-              });
-            },
-          ),
+          const FilesSortActions(),
           IconButton(
             tooltip: 'Suchen',
             icon: const Icon(Icons.search),
@@ -162,7 +126,7 @@ class _FilesViewState extends State<_FilesView> {
       body: Column(
         children: [
           ClipboardBanner(
-            currentFolder: _currentFolderPath,
+            currentFolder: webdavFolderPath(widget.path),
             onPasteDone: bloc.refresh,
           ),
           Expanded(
@@ -176,7 +140,7 @@ class _FilesViewState extends State<_FilesView> {
                     text: 'Der Ordner ist leer',
                   );
                 }
-                final files = _sorted(listing, foldersToTop);
+                final files = _sorted(listing, sort);
                 return ListView.builder(
                   padding: EdgeInsets.zero,
                   itemCount: files.length,