added guardian login with views for their assigned childs

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),