small optimizations

app/lib/extensions/nullable.dart

@@ -1,26 +1,30 @@
 extension NullableX<T extends Object?> on T? {
   @pragma('vm:prefer-inline')
   R? mapNotNull<R>(R? Function(T) callback) {
-    // We can simplify this by using the null-aware operator
-    return this != null ? callback(this as T) : null;
+    // Already optimized, but can simplify further
+    return this == null ? null : callback(this as T);
   }
 }
 
 extension NullableStringX on String? {
   @pragma('vm:prefer-inline')
-  String? get whenNotEmpty => (this?.isNotEmpty ?? false) ? this : null;
+  String? get whenNotEmpty {
+    // Avoid double null check
+    final value = this;
+    return value != null && value.isNotEmpty ? value : null;
+  }
 
   @pragma('vm:prefer-inline')
-  bool get isNotEmpty => this?.isNotEmpty ?? false;
+  bool get isNotEmpty => this != null && this!.isNotEmpty;
 
   @pragma('vm:prefer-inline')
-  bool get isEmpty => this?.isEmpty ?? true;
+  bool get isEmpty => this == null || this!.isEmpty;
 }
 
 extension NullableIterable on Iterable? {
   @pragma('vm:prefer-inline')
-  bool get isNotEmpty => this?.isNotEmpty ?? false;
+  bool get isNotEmpty => this != null && this!.isNotEmpty;
 
   @pragma('vm:prefer-inline')
-  bool get isEmpty => this?.isEmpty ?? true;
+  bool get isEmpty => this == null || this!.isEmpty;
 }

app/lib/features/geckoview/domain/providers.dart

@@ -136,7 +136,7 @@ class EngineReadyState extends _$EngineReadyState {
         eventService.engineReadyStateEvents
             .firstWhere((value) => value == true)
             .timeout(
-              const Duration(seconds: 5),
+              const Duration(seconds: 3),
               onTimeout: () {
                 logger.w('Waiting for engine ready state timed out');
                 return true;

app/lib/features/geckoview/domain/providers.g.dart

@@ -96,7 +96,7 @@ final engineSuggestionsServiceProvider =
 @Deprecated('Will be removed in 3.0. Use Ref instead')
 // ignore: unused_element
 typedef EngineSuggestionsServiceRef = ProviderRef<GeckoSuggestionsService>;
-String _$engineReadyStateHash() => r'c682333e2e07cf0635aa7ae793a2088ca648c950';
+String _$engineReadyStateHash() => r'a892c48ffc29e3414de12e66d9bfec522e4f40a8';
 
 /// See also [EngineReadyState].
 @ProviderFor(EngineReadyState)

app/lib/features/geckoview/domain/repositories/tab.dart

@@ -268,7 +268,7 @@ class TabRepository extends _$TabRepository {
       });
     });
 
-    ref.listen(intentStreamProvider, (previous, next) {
+    ref.listen(engineBoundIntentStreamProvider, (previous, next) {
       next.whenData((value) async {
         switch (value) {
           case SharedUrl():

app/lib/features/geckoview/domain/repositories/tab.g.dart

@@ -6,7 +6,7 @@ part of 'tab.dart';
 // RiverpodGenerator
 // **************************************************************************
 
-String _$tabRepositoryHash() => r'9bdd6ddc0254c830b783eb2a987d98d4f1d313fb';
+String _$tabRepositoryHash() => r'a7f1112a2404b0be96be44b6c1763aa5cc931e5b';
 
 /// See also [TabRepository].
 @ProviderFor(TabRepository)

app/lib/features/geckoview/features/browser/domain/providers/intent.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:lensai/data/models/received_intent_parameter.dart';
 import 'package:lensai/extensions/nullable.dart';
 import 'package:lensai/features/app_widget/domain/services/home_widget.dart';
+import 'package:lensai/features/geckoview/domain/providers.dart';
 import 'package:lensai/features/share_intent/domain/entities/shared_content.dart';
 import 'package:lensai/features/share_intent/domain/services/sharing_intent.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
@@ -24,7 +25,7 @@ final _contentParserTransformer =
     );
 
 @Riverpod()
-class IntentStream extends _$IntentStream {
+class EngineBoundIntentStream extends _$EngineBoundIntentStream {
   late StreamController<SharedContent> _streamController;
 
   @override
@@ -34,6 +35,11 @@ class IntentStream extends _$IntentStream {
       await _streamController.close();
     });
 
+    final engineReady = ref.watch(engineReadyStateProvider);
+    if (!engineReady) {
+      return const Stream.empty();
+    }
+
     final sharingItentStream = ref.watch(sharingIntentStreamProvider);
     final appWidgetLaunchStream = ref.watch(appWidgetLaunchStreamProvider);
 

app/lib/features/geckoview/features/browser/domain/providers/intent.g.dart

@@ -6,22 +6,25 @@ part of 'intent.dart';
 // RiverpodGenerator
 // **************************************************************************
 
-String _$intentStreamHash() => r'e78268ec703cd0d1f08d41b9e10a487e6000b7da';
+String _$engineBoundIntentStreamHash() =>
+    r'860e39a7b608d579f7383e2199719067ad26f268';
 
-/// See also [IntentStream].
-@ProviderFor(IntentStream)
-final intentStreamProvider =
-    AutoDisposeStreamNotifierProvider<IntentStream, SharedContent>.internal(
-      IntentStream.new,
-      name: r'intentStreamProvider',
-      debugGetCreateSourceHash:
-          const bool.fromEnvironment('dart.vm.product')
-              ? null
-              : _$intentStreamHash,
-      dependencies: null,
-      allTransitiveDependencies: null,
-    );
+/// See also [EngineBoundIntentStream].
+@ProviderFor(EngineBoundIntentStream)
+final engineBoundIntentStreamProvider = AutoDisposeStreamNotifierProvider<
+  EngineBoundIntentStream,
+  SharedContent
+>.internal(
+  EngineBoundIntentStream.new,
+  name: r'engineBoundIntentStreamProvider',
+  debugGetCreateSourceHash:
+      const bool.fromEnvironment('dart.vm.product')
+          ? null
+          : _$engineBoundIntentStreamHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
 
-typedef _$IntentStream = AutoDisposeStreamNotifier<SharedContent>;
+typedef _$EngineBoundIntentStream = AutoDisposeStreamNotifier<SharedContent>;
 // ignore_for_file: type=lint
 // ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member, deprecated_member_use_from_same_package

app/lib/features/geckoview/features/tabs/features/vector_store/utils/markdown_document_splitter.dart

@@ -5,7 +5,7 @@ import 'package:lensai/features/geckoview/features/tabs/features/vector_store/ut
 
 typedef DocumentParts = ({String mainDocumentId, List<Document> parts});
 
-List<Document> mergeShortDocuments(
+List<Document> _mergeShortDocuments(
   List<Document> documents,
   int maxLength, {
   String separator = '\n',
@@ -69,7 +69,7 @@ DocumentParts? splitMarkdownDocument(
   }
 
   final headerKeys = headersToSplitOn.map((header) => header.$2).toSet();
-  final mergedDocChunks = mergeShortDocuments(
+  final mergedDocChunks = _mergeShortDocuments(
     docChunks,
     chunkSize,
     doMerge: (a, b) {