implemented shared items view for Talk chats with tabbed categories and on-scroll pagination

lib/view/pages/talk/details/chat_info.dart

@@ -4,6 +4,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import '../../../../api/marianumcloud/talk/actions/talk_actions.dart';
 import '../../../../api/marianumcloud/talk/get_participants/get_participants_cache.dart';
 import '../../../../api/marianumcloud/talk/get_participants/get_participants_response.dart';
+import '../../../../api/marianumcloud/talk/get_shared_items/get_shared_items_overview_response.dart';
 import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import '../../../../widget/app_progress_indicator.dart';
@@ -11,10 +12,10 @@ import '../../../../widget/async_action_button.dart';
 import '../../../../widget/avatar_actions_sheet.dart';
 import '../../../../widget/confirm_dialog.dart';
 import '../../../../widget/large_profile_picture_view.dart';
-import '../../../../widget/loading_spinner.dart';
 import '../../../../widget/user_avatar.dart';
 import '../talk_navigator.dart';
 import 'participants_list_view.dart';
+import 'shared_items_view.dart';
 
 class ChatInfo extends StatefulWidget {
   final GetRoomResponseObject room;
@@ -26,6 +27,7 @@ class ChatInfo extends StatefulWidget {
 
 class _ChatInfoState extends State<ChatInfo> {
   GetParticipantsResponse? participants;
+  GetSharedItemsOverviewResponse? _sharesOverview;
   late bool _isFavorite;
   int _avatarVersion = 0;
   bool _avatarBusy = false;
@@ -42,6 +44,16 @@ class _ChatInfoState extends State<ChatInfo> {
         });
       },
     );
+    _preloadShares();
+  }
+
+  Future<void> _preloadShares() async {
+    try {
+      final overview = await SharedItemsView.prefetchOverview(widget.room.token);
+      if (mounted) setState(() => _sharesOverview = overview);
+    } catch (_) {
+      // Best-effort: the shares view loads on demand if the preload fails.
+    }
   }
 
   void _refreshList() => context.read<ChatListBloc>().refresh();
@@ -187,7 +199,15 @@ class _ChatInfoState extends State<ChatInfo> {
             ),
           const SizedBox(height: 30),
           if (participants == null)
-            const Center(child: LoadingSpinner())
+            const ListTile(
+              leading: Icon(Icons.supervised_user_circle),
+              title: Text('Mitglieder'),
+              trailing: SizedBox(
+                width: 24,
+                height: 24,
+                child: AppProgressIndicator.small(),
+              ),
+            )
           else
             ListTile(
               leading: const Icon(Icons.supervised_user_circle),
@@ -201,6 +221,15 @@ class _ChatInfoState extends State<ChatInfo> {
                 ),
               ),
             ),
+          ListTile(
+            leading: const Icon(Icons.perm_media_outlined),
+            title: const Text('Medien und Dokumente'),
+            trailing: const Icon(Icons.arrow_right),
+            onTap: () => TalkNavigator.pushSplitView(
+              context,
+              SharedItemsView(widget.room, overview: _sharesOverview),
+            ),
+          ),
           if (_isFavorite)
             AsyncListTile(
               leading: const Icon(Icons.stars_outlined),