implemented internal file sharing and saving, added server-side file references, refactored share pickers for unified flows, and updated UI branding labels

lib/view/pages/talk/chat_list.dart

@@ -153,10 +153,10 @@ class _ChatListViewState extends State<_ChatListView> {
               ) {
                 if (username == null || !context.mounted) return;
                 ConfirmDialog(
-                  title: 'Chat starten',
+                  title: 'Talk-Chat starten',
                   content:
-                      "Möchtest du einen Chat mit Nutzer '$username' starten?",
-                  confirmButton: 'Chat starten',
+                      "Möchtest du einen Talk-Chat mit Nutzer '$username' starten?",
+                  confirmButton: 'Talk-Chat starten',
                   onConfirmAsync: () => bloc.createDirectChat(username),
                 ).asDialog(context);
               });

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

@@ -6,6 +6,7 @@ import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../extensions/date_time.dart';
 import '../../../../extensions/text.dart';
 import '../../../../routing/app_routes.dart';
+import '../../../../share_intent/remote_file_ref.dart';
 import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../../utils/download_manager.dart';
 import '../../../../widget/confirm_dialog.dart';
@@ -90,7 +91,14 @@ class _ChatBubbleState extends State<ChatBubble>
     if (status is DownloadDone) {
       DownloadManager.instance.clear(job.remotePath);
       _detachJob();
-      AppRoutes.openFileViewer(context, status.localPath);
+      final talkFile = message.file;
+      AppRoutes.openFileViewer(
+        context,
+        status.localPath,
+        remoteFile: talkFile != null
+            ? RemoteFileRef.fromTalk(talkFile)
+            : null,
+      );
       setState(() {});
     } else if (status is DownloadFailed) {
       final message = status.message;

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

@@ -9,6 +9,7 @@ import '../../../../api/marianumcloud/talk/react_message/react_message.dart';
 import '../../../../api/marianumcloud/talk/react_message/react_message_params.dart';
 import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../routing/app_routes.dart';
+import '../../../../share_intent/remote_file_ref.dart';
 import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../../utils/clipboard_helper.dart';
 import '../../../../widget/app_progress_indicator.dart';
@@ -18,6 +19,16 @@ import '../../../../widget/details_bottom_sheet.dart';
 
 const _commonReactions = <String>['👍', '👎', '😆', '❤️', '👀'];
 
+RichObjectString? _attachedFile(GetChatResponseObject bubbleData) {
+  final file = bubbleData.messageParameters?['file'];
+  if (file == null ||
+      file.path == null ||
+      file.type != RichObjectStringObjectType.file) {
+    return null;
+  }
+  return file;
+}
+
 /// Long-press / double-tap options dialog for a single chat message bubble.
 /// The hosting [ChatBubble] keeps responsibility for rendering the bubble;
 /// this file owns the modal interactions (react, reply, copy, delete, ...).
@@ -36,6 +47,7 @@ void showChatMessageOptionsDialog(
       DateTime.fromMillisecondsSinceEpoch(
         bubbleData.timestamp * 1000,
       ).add(const Duration(hours: 6)).isAfter(DateTime.now());
+  final attachedFile = _attachedFile(bubbleData);
 
   showDetailsBottomSheet(
     context,
@@ -79,6 +91,19 @@ void showChatMessageOptionsDialog(
             Navigator.of(sheetCtx).pop();
           },
         ),
+      if (attachedFile != null)
+        ListTile(
+          leading: const Icon(Icons.cloud_outlined),
+          title: const Text('In Cloud speichern'),
+          onTap: () {
+            Navigator.of(sheetCtx).pop();
+            if (!parentContext.mounted) return;
+            AppRoutes.openInternalSaveToFolder(
+              parentContext,
+              RemoteFileRef.fromTalk(attachedFile),
+            );
+          },
+        ),
       if (!kReleaseMode &&
           !isSender &&
           chatData.type != GetRoomResponseObjectConversationType.oneToOne)

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

@@ -207,11 +207,11 @@ class _ChatTileState extends State<ChatTile> {
               ),
             ListTile(
               leading: const Icon(Icons.delete_outline),
-              title: const Text('Konversation verlassen'),
+              title: const Text('Talk-Chat verlassen'),
               onTap: () {
                 Navigator.of(sheetCtx).pop();
                 ConfirmDialog(
-                  title: 'Chat verlassen',
+                  title: 'Talk-Chat verlassen',
                   content:
                       'Du benötigst ggf. eine Einladung um erneut beizutreten.',
                   confirmButton: 'Verlassen',