consolidated downloads dir, nextcloud origin, upload route and chat timestamps; added webdav path tests

lib/view/pages/files/files.dart

@@ -2,10 +2,10 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
 
 import '../../../api/marianumcloud/webdav/queries/list_files/cacheable_file.dart';
 import '../../../api/marianumcloud/webdav/queries/list_files/list_files_response.dart';
+import '../../../routing/app_routes.dart';
 import '../../../state/app/infrastructure/loadable_state/loadable_state.dart';
 import '../../../state/app/infrastructure/loadable_state/view/loadable_state_consumer.dart';
 import '../../../state/app/infrastructure/utility_widgets/bloc_module.dart';
@@ -15,7 +15,6 @@ import '../../../utils/cache_invalidation_bus.dart';
 import '../../../widget/placeholder_view.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';
 import 'widgets/clipboard_banner.dart';
@@ -82,14 +81,11 @@ class _FilesViewState extends State<_FilesView> {
     if (paths == null) return;
     final bloc = context.read<FilesBloc>();
     unawaited(
-      pushScreen(
+      AppRoutes.openFilesUpload(
         context,
-        withNavBar: false,
-        screen: FilesUploadDialog(
-          filePaths: paths,
-          remotePath: widget.path.join('/'),
-          onUploadFinished: (_) => bloc.refresh(),
-        ),
+        filePaths: paths,
+        remotePath: widget.path.join('/'),
+        onUploadFinished: (_) => bloc.refresh(),
       ),
     );
   }

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

@@ -32,7 +32,7 @@ class FileLeading extends StatelessWidget {
               borderRadius: BorderRadius.circular(4),
               child: CachedNetworkImage(
                 imageUrl:
-                    'https://${EndpointData().nextcloud().full()}'
+                    '${EndpointData().nextcloud().origin()}'
                     '/index.php/core/preview'
                     '?fileId=$fileId&x=128&y=128&a=0',
                 httpHeaders: SessionManager().requireNextcloud().authHeaders,