Add generation status and cancel control

SovereignAI-Starter/flutter_app/test/widget_test.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:record/record.dart';
+import 'dart:async';
 
 import 'package:flutter_app/core/network/api_repository.dart';
 import 'package:flutter_app/features/chat/presentation/cubit/chat_cubit.dart';
@@ -22,6 +23,22 @@ class _TestApiRepository extends ApiRepository {
   Future<List<SavedConversation>> listConversations() async => [];
 }
 
+class _CancellableWidgetApi extends _TestApiRepository {
+  final controller = StreamController<String>();
+
+  @override
+  Future<void> saveConversation(SavedConversation conversation) async {}
+
+  @override
+  Stream<String> completeStream(List<ChatMessage> messages, {String? model}) =>
+      controller.stream;
+
+  @override
+  void cancelActiveRequest() {
+    controller.close();
+  }
+}
+
 void main() {
   testWidgets('chat page fits a compact Windows window', (tester) async {
     tester.view.physicalSize = const Size(800, 600);
@@ -47,4 +64,43 @@ void main() {
     expect(find.text('مساعدك المحلي'), findsOneWidget);
     expect(tester.takeException(), isNull);
   });
+
+  testWidgets('stop button cancels an active answer', (tester) async {
+    tester.view.physicalSize = const Size(1000, 700);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.resetDevicePixelRatio);
+
+    final api = _CancellableWidgetApi();
+    final cubit = ChatCubit(api);
+    await tester.pumpWidget(
+      MultiRepositoryProvider(
+        providers: [RepositoryProvider<ApiRepository>.value(value: api)],
+        child: MultiBlocProvider(
+          providers: [
+            BlocProvider<ChatCubit>.value(value: cubit),
+            BlocProvider(create: (_) => VoiceCubit(api, AudioRecorder())),
+          ],
+          child: const SovereignApp(),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    await tester.enterText(find.byType(TextField), 'أوقف هذا الرد');
+    await tester.tap(find.byTooltip('إرسال'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 30));
+    expect(find.byTooltip('إيقاف التوليد'), findsOneWidget);
+
+    await tester.tap(find.byTooltip('إيقاف التوليد'));
+    await tester.pump();
+    await tester.pumpAndSettle(const Duration(milliseconds: 50));
+
+    expect(cubit.state.requestStatus, RequestStatus.cancelled);
+    expect(find.byTooltip('إرسال'), findsOneWidget);
+    expect(tester.takeException(), isNull);
+    await cubit.close();
+    await api.controller.close();
+  });
 }