fix: keep agent streams alive during long tasks

SovereignAI-Starter/flutter_app/test/chat_cubit_test.dart

@@ -16,6 +16,8 @@ class _VersionTestApi extends ApiRepository {
   SavedConversation? lastSaved;
   String? indexedWorkspace;
   List<String> indexedFiles = const [];
+  final indexedRequests = <List<String>>[];
+  final availableFiles = <String>['README.md'];
   List<String> deletedFiles = const [];
   String? registeredProject;
   String? unregisteredProject;
@@ -60,9 +62,8 @@ class _VersionTestApi extends ApiRepository {
   Future<List<SavedConversation>> listConversations() async => [];
 
   @override
-  Future<List<String>> listWorkspaceFiles(String workspacePath) async => [
-    'README.md',
-  ];
+  Future<List<String>> listWorkspaceFiles(String workspacePath) async =>
+      List.of(availableFiles);
 
   @override
   Future<List<String>> registerWorkspaceProject(String workspacePath) async {
@@ -82,6 +83,8 @@ class _VersionTestApi extends ApiRepository {
   ) async {
     indexedWorkspace = workspacePath;
     indexedFiles = files;
+    indexedRequests.add(List.of(files));
+    await Future<void>.delayed(const Duration(milliseconds: 1));
     return {
       'indexed': [
         for (final file in files) {'path': file, 'chunks': 2},
@@ -175,21 +178,39 @@ void main() {
 
   test('selected workspace files can be indexed as local knowledge', () async {
     final api = _VersionTestApi();
+    api.availableFiles.add('lib/main.dart');
     final cubit = ChatCubit(api, settingsStore: LocalSettingsStore.inMemory());
     await Future<void>.delayed(Duration.zero);
 
     await cubit.selectWorkspace(r'C:\Projects\sample');
-    cubit.selectWorkspaceFiles(['README.md']);
+    final progressUpdates = <String?>[];
+    final subscription = cubit.stream.listen(
+      (state) => progressUpdates.add(state.agentProgress),
+    );
+    cubit.selectWorkspaceFiles(['README.md', 'lib/main.dart']);
     final message = await cubit.indexSelectedWorkspaceKnowledge();
 
     expect(api.indexedWorkspace, r'C:\Projects\sample');
-    expect(api.indexedFiles, ['README.md']);
-    expect(message, contains('2 مقطعًا'));
+    expect(api.indexedRequests, [
+      ['README.md'],
+      ['lib/main.dart'],
+    ]);
+    expect(message, contains('فُهرست 2 ملفًا'));
+    expect(message, contains('4 مقطعًا'));
+    expect(
+      progressUpdates,
+      contains('يفهرس الملف 1/2: README.md…'),
+    );
+    expect(
+      progressUpdates,
+      contains('يفهرس الملف 2/2: main.dart…'),
+    );
     expect(cubit.state.agentProgress, isNull);
+    await subscription.cancel();
 
     final removal = await cubit.removeSelectedWorkspaceKnowledge();
-    expect(api.deletedFiles, ['README.md']);
-    expect(removal, contains('أُزيل 1 ملف'));
+    expect(api.deletedFiles, ['README.md', 'lib/main.dart']);
+    expect(removal, contains('أُزيل 2 ملف'));
     await cubit.close();
   });