added guardian login with views for their assigned childs

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

@@ -9,8 +9,8 @@ import '../../../../api/marianumcloud/talk/get_shared_items/get_shared_items_ove
 import '../../../../api/marianumcloud/talk/get_shared_items/get_shared_items_response.dart';
 import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../extensions/date_time.dart';
-import '../../../../model/account_data.dart';
 import '../../../../model/endpoint_data.dart';
+import '../../../../session/session_manager.dart';
 import '../../../../share_intent/remote_file_ref.dart';
 import '../../../../utils/downloads/download_job.dart';
 import '../../../../widget/app_progress_indicator.dart';
@@ -54,9 +54,10 @@ class SharedItemsPage {
   const SharedItemsPage(this.items, this.lastKnownMessageId, this.hasMore);
 }
 
-List<GetChatResponseObject> _fileItems(List<GetChatResponseObject> items) => items
-    .where((item) => item.messageParameters?['file']?.path != null)
-    .toList();
+List<GetChatResponseObject> _fileItems(List<GetChatResponseObject> items) =>
+    items
+        .where((item) => item.messageParameters?['file']?.path != null)
+        .toList();
 
 SharedItemsPage buildSharedItemsPage(
   GetSharedItemsResponse response,
@@ -140,7 +141,9 @@ class _SharedItemsViewState extends State<SharedItemsView>
   Future<void> _load() async {
     setState(() => _error = null);
     try {
-      final overview = await SharedItemsView.prefetchOverview(widget.room.token);
+      final overview = await SharedItemsView.prefetchOverview(
+        widget.room.token,
+      );
       if (!mounted) return;
       _overview = overview;
       _prepareTabs();
@@ -501,7 +504,10 @@ class _SharedItemTileState extends State<_SharedItemTile>
     if (isDownloading) {
       confirmCancelDownload();
     } else {
-      startDownload(name: _file.name, remoteFile: RemoteFileRef.fromTalk(_file));
+      startDownload(
+        name: _file.name,
+        remoteFile: RemoteFileRef.fromTalk(_file),
+      );
     }
   }
 
@@ -533,7 +539,7 @@ class _SharedItemTileState extends State<_SharedItemTile>
         children: [
           CachedNetworkImage(
             imageUrl: _previewUrl,
-            httpHeaders: AccountData().authHeaders(),
+            httpHeaders: SessionManager().requireNextcloud().authHeaders,
             fit: BoxFit.cover,
             fadeInDuration: Duration.zero,
             fadeOutDuration: Duration.zero,