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

lib/view/pages/talk/widgets/chat_bubble.dart

@@ -257,9 +257,7 @@ class _ChatBubbleState extends State<ChatBubble>
         : actorText;
 
     final timeText = Text(
-      DateTime.fromMillisecondsSinceEpoch(
-        widget.bubbleData.timestamp * 1000,
-      ).formatHm(),
+      widget.bubbleData.sentAt.formatHm(),
       textAlign: TextAlign.end,
       style: const TextStyle(color: _kTimeIconColor, fontSize: _kTimeIconSize),
     );

lib/view/pages/talk/widgets/chat_message_options_dialog.dart

@@ -67,9 +67,7 @@ void showChatMessageOptionsDialog(
   final hasReactions = bubbleData.reactions?.isNotEmpty ?? false;
   final canDelete =
       isSender &&
-      DateTime.fromMillisecondsSinceEpoch(
-        bubbleData.timestamp * 1000,
-      ).add(const Duration(hours: 6)).isAfter(DateTime.now());
+      bubbleData.sentAt.add(const Duration(hours: 6)).isAfter(DateTime.now());
   final attachedFile = _attachedFile(bubbleData);
 
   showDetailsBottomSheet(

lib/view/pages/talk/widgets/chat_textfield.dart

@@ -2,12 +2,12 @@ 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/talk/room/get_room_response.dart';
 import '../../../../api/marianumcloud/talk/send_message/send_message.dart';
 import '../../../../api/marianumcloud/talk/send_message/send_message_params.dart';
 import '../../../../api/marianumcloud/talk/share_files_to_chat.dart';
+import '../../../../routing/app_routes.dart';
 import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../../state/app/modules/chat/bloc/chat_state.dart';
 import '../../../../state/app/modules/settings/bloc/settings_cubit.dart';
@@ -18,7 +18,6 @@ import '../../../../widget/downloads/download_tray.dart';
 import '../../../../widget/emoji_picker_dialog.dart';
 import '../../../../widget/file_pick.dart';
 import '../../../../widget/focus_behaviour.dart';
-import '../../files/files_upload_dialog.dart';
 import 'answer_reference.dart';
 import 'poll_create_sheet.dart';
 
@@ -71,15 +70,12 @@ class _ChatTextfieldState extends State<ChatTextfield> {
 
     if (!mounted) return;
     unawaited(
-      pushScreen(
+      AppRoutes.openFilesUpload(
         context,
-        withNavBar: false,
-        screen: FilesUploadDialog(
-          filePaths: paths,
-          remotePath: talkShareFolder,
-          onUploadFinished: share,
-          uniqueNames: true,
-        ),
+        filePaths: paths,
+        remotePath: talkShareFolder,
+        onUploadFinished: share,
+        uniqueNames: true,
       ),
     );
   }

lib/view/pages/talk/widgets/chat_tile.dart

@@ -174,7 +174,7 @@ class _ChatTileState extends State<ChatTile> {
         ],
       ),
       subtitle: Text(
-        '${DateTime.fromMillisecondsSinceEpoch(widget.data.lastMessage.timestamp * 1000).formatRelative()}: '
+        '${widget.data.lastMessage.sentAt.formatRelative()}: '
         '${_lastMessagePreview()}',
         overflow: TextOverflow.ellipsis,
       ),