loading state and error handling refactor

lib/view/pages/files/files.dart

@@ -2,7 +2,6 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:loader_overlay/loader_overlay.dart';
 import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
 
 import '../../../api/marianumcloud/webdav/queries/listFiles/cacheableFile.dart';
@@ -12,6 +11,7 @@ import '../../../state/app/infrastructure/utilityWidgets/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 '../../../widget/async_action_button.dart';
 import '../../../widget/file_pick.dart';
 import '../../../widget/placeholder_view.dart';
 import 'widgets/file_element.dart';
@@ -175,12 +175,10 @@ class _FilesViewState extends State<_FilesView> {
             foldersToTop: context.watch<SettingsCubit>().val().fileSettings.sortFoldersToTop,
             reversed: currentSortDirection,
           );
-          return LoaderOverlay(
-            child: ListView.builder(
-              padding: EdgeInsets.zero,
-              itemCount: files.length,
-              itemBuilder: (context, index) => FileElement(files[index], widget.path, bloc.refresh),
-            ),
+          return ListView.builder(
+            padding: EdgeInsets.zero,
+            itemCount: files.length,
+            itemBuilder: (context, index) => FileElement(files[index], widget.path, bloc.refresh),
           );
         },
       ),
@@ -233,15 +231,17 @@ class _FilesViewState extends State<_FilesView> {
         content: TextField(
           controller: inputController,
           decoration: const InputDecoration(labelText: 'Name'),
+          autofocus: true,
         ),
         actions: [
-          TextButton(onPressed: () => Navigator.of(dialogCtx).pop(), child: const Text('Abbrechen')),
-          TextButton(
-            onPressed: () {
-              bloc.createFolder(inputController.text);
-              Navigator.of(dialogCtx).pop();
+          AsyncDialogAction(
+            confirmLabel: 'Ordner erstellen',
+            onConfirm: () async {
+              if (inputController.text.trim().isEmpty) {
+                throw Exception('Bitte einen Namen eingeben.');
+              }
+              await bloc.createFolder(inputController.text.trim());
             },
-            child: const Text('Ordner erstellen'),
           ),
         ],
       ),

lib/view/pages/files/files_upload_dialog.dart

@@ -254,7 +254,7 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
                         border: const UnderlineInputBorder(),
                         label: Text('Datei ${index+1}'),
                         errorText: currentFile.isConflicting ? 'existiert bereits' : null,
-                        errorStyle: const TextStyle(color: Colors.red),
+                        errorStyle: TextStyle(color: Theme.of(context).colorScheme.error),
                       ),
                       onChanged: (input) {
                         currentFile.fileName = input;

lib/view/pages/files/widgets/file_element.dart

@@ -159,11 +159,12 @@ class _FileElementState extends State<FileElement> {
                   showDialog(context: context, builder: (context) => ConfirmDialog(
                     title: 'Element löschen?',
                     content: 'Das Element wird unwiederruflich gelöscht.',
-                    onConfirm: () {
-                      WebdavApi.webdav
-                          .then((value) => value.delete(PathUri.parse(widget.file.path)))
-                          .then((value) => widget.refetch());
-                    }
+                    confirmButton: 'Löschen',
+                    onConfirmAsync: () async {
+                      final webdav = await WebdavApi.webdav;
+                      await webdav.delete(PathUri.parse(widget.file.path));
+                      widget.refetch();
+                    },
                   ));
                 },
               ),