added guardian login with views for their assigned childs

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

@@ -8,9 +8,9 @@ import '../../../../api/marianumcloud/talk/chat/rich_object_string_processor.dar
 import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../api/marianumcloud/talk/set_read_marker/set_read_marker.dart';
 import '../../../../extensions/date_time.dart';
-import '../../../../model/account_data.dart';
 import '../../../../notification/notification_tasks.dart';
 import '../../../../routing/app_routes.dart';
+import '../../../../session/session_manager.dart';
 import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import '../../../../utils/haptics.dart';
@@ -51,13 +51,9 @@ class _ChatTileState extends State<ChatTile> {
   @override
   void initState() {
     super.initState();
-    AccountData().waitForPopulation().then((_) {
+    SessionManager().waitForLoad().then((session) {
       if (!mounted) return;
-      setState(
-        () => selfUsername = AccountData().isPopulated()
-            ? AccountData().getUsername()
-            : null,
-      );
+      setState(() => selfUsername = session?.nextcloud?.username);
     });
   }
 

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

@@ -5,7 +5,7 @@ import '../../../../api/marianumcloud/talk/get_poll/get_poll_state_response.dart
 import '../../../../api/marianumcloud/talk/room/get_room_response.dart';
 import '../../../../api/marianumcloud/talk/vote_poll/vote_poll.dart';
 import '../../../../api/marianumcloud/talk/vote_poll/vote_poll_params.dart';
-import '../../../../model/account_data.dart';
+import '../../../../session/session_manager.dart';
 import '../../../../widget/async_action_button.dart';
 import '../../../../widget/confirm_dialog.dart';
 import '../../../../widget/demo_restricted.dart';
@@ -186,7 +186,7 @@ class _PollOptionsListState extends State<PollOptionsList> {
 
   Widget _actionBar(GetPollStateResponseObject poll, ThemeData theme) {
     final canClose = poll.canClose(
-      selfId: AccountData().getUsername(),
+      selfId: SessionManager().requireNextcloud().username,
       participantType: widget.room.participantType,
     );
     if (!_isInteractive && !canClose) return const SizedBox.shrink();

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

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import '../../../../access/user_role.dart';
 import '../../../../api/marianumconnect/queries/user_search/user_search_response.dart';
 import '../../../../widget/user_avatar.dart';
 
@@ -18,14 +19,14 @@ class UserSearchTile extends StatelessWidget {
       leading: UserAvatar(id: user.username, isGroup: false),
       title: Text('${user.firstName} ${user.lastName}'),
       subtitle: Text(_subtitle),
-      trailing: RoleBadge(userType: user.userType),
+      trailing: RoleBadge(role: UserRole.parse(user.userType)),
       onTap: onTap,
     );
   }
 
   String get _subtitle {
     final className = user.className;
-    if (user.userType == 'STUDENT' &&
+    if (UserRole.parse(user.userType) == UserRole.student &&
         className != null &&
         className.isNotEmpty) {
       return '${user.username} · $className';
@@ -36,16 +37,17 @@ class UserSearchTile extends StatelessWidget {
 
 /// Compact colour-coded badge distinguishing teachers, students and staff.
 class RoleBadge extends StatelessWidget {
-  final String userType;
+  final UserRole role;
 
-  const RoleBadge({super.key, required this.userType});
+  const RoleBadge({super.key, required this.role});
 
   @override
   Widget build(BuildContext context) {
-    final (label, color) = switch (userType) {
-      'TEACHER' => ('Lehrkraft', Colors.blue),
-      'STUDENT' => ('Schüler:in', Colors.green),
-      _ => ('Personal', Colors.orange),
+    final (label, color) = switch (role) {
+      UserRole.teacher => ('Lehrkraft', Colors.blue),
+      UserRole.student => ('Schüler:in', Colors.green),
+      UserRole.parent => ('Elternteil', Colors.purple),
+      UserRole.staff || UserRole.unknown => ('Personal', Colors.orange),
     };
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),