implemented global user search integration for Talk chats with role-coded badges and direct chat creation logic

lib/view/pages/talk/join_chat.dart

@@ -2,14 +2,14 @@ import 'package:async/async.dart';
 import 'package:flutter/material.dart';
 
 import '../../../api/errors/error_mapper.dart';
-import '../../../api/marianumcloud/autocomplete/autocomplete_api.dart';
-import '../../../api/marianumcloud/autocomplete/autocomplete_response.dart';
-import '../../../model/endpoint_data.dart';
+import '../../../api/marianumconnect/queries/user_search/user_search.dart';
+import '../../../api/marianumconnect/queries/user_search/user_search_response.dart';
 import '../../../widget/app_progress_indicator.dart';
 import '../../../widget/placeholder_view.dart';
+import 'widgets/user_search_tile.dart';
 
 class JoinChat extends SearchDelegate<String> {
-  CancelableOperation<AutocompleteResponse>? future;
+  CancelableOperation<UserSearchResponse>? future;
 
   @override
   List<Widget>? buildActions(BuildContext context) => [
@@ -27,7 +27,7 @@ class JoinChat extends SearchDelegate<String> {
         },
       ),
     if (query.isNotEmpty)
-      IconButton(onPressed: () => query = '', icon: const Icon(Icons.delete)),
+      IconButton(onPressed: () => query = '', icon: const Icon(Icons.clear)),
   ];
 
   @override
@@ -39,36 +39,30 @@ class JoinChat extends SearchDelegate<String> {
 
     if (query.isEmpty) {
       return const PlaceholderView(
-        text: 'Suche nach benutzern',
+        text: 'Suche nach Schülerinnen, Schülern und Lehrkräften',
         icon: Icons.person_search_outlined,
       );
     }
 
-    future = CancelableOperation.fromFuture(AutocompleteApi().find(query));
-    return FutureBuilder<AutocompleteResponse>(
+    future = CancelableOperation.fromFuture(UserSearch().run(query));
+    return FutureBuilder<UserSearchResponse>(
       future: future!.value,
       builder: (context, snapshot) {
         if (snapshot.hasData) {
+          final results = snapshot.data!.result;
+          if (results.isEmpty) {
+            return PlaceholderView(
+              icon: Icons.person_off_outlined,
+              text: 'Keine Treffer für „$query"',
+            );
+          }
           return ListView.builder(
-            itemCount: snapshot.data!.data.length,
+            itemCount: results.length,
             itemBuilder: (context, index) {
-              var object = snapshot.data!.data[index];
-              var circleAvatar = CircleAvatar(
-                foregroundImage: Image.network(
-                  'https://${EndpointData().nextcloud().full()}/avatar/${object.id}/128',
-                ).image,
-                backgroundColor: Theme.of(context).primaryColor,
-                foregroundColor: Colors.white,
-                child: const Icon(Icons.person),
-              );
-              return ListTile(
-                leading: circleAvatar,
-                title: Text(object.label),
-                subtitle: Text(object.id),
-                trailing: const Icon(Icons.arrow_right),
-                onTap: () {
-                  close(context, object.id);
-                },
+              final object = results[index];
+              return UserSearchTile(
+                user: object,
+                onTap: () => close(context, object.username),
               );
             },
           );