chore: when choices array goes off screen, stop playing TTS (#1945)

lib/pangea/choreographer/controllers/choreographer.dart

@@ -338,6 +338,7 @@ class Choreographer {
     _textController.selection =
         TextSelection.collapsed(offset: _textController.text.length);
     giveInputFocus();
+    tts.stop();
   }
 
   Future<void> onReplacementSelect({

lib/pangea/choreographer/widgets/igc/span_card.dart

@@ -16,6 +16,7 @@ import 'package:fluffychat/pangea/choreographer/utils/match_copy.dart';
 import 'package:fluffychat/pangea/choreographer/widgets/igc/card_error_widget.dart';
 import 'package:fluffychat/pangea/common/utils/error_handler.dart';
 import 'package:fluffychat/pangea/events/models/pangea_token_model.dart';
+import 'package:fluffychat/pangea/toolbar/controllers/tts_controller.dart';
 import '../../../../widgets/matrix.dart';
 import '../../../bot/widgets/bot_face_svg.dart';
 import '../../../common/controllers/pangea_controller.dart';
@@ -63,6 +64,14 @@ class SpanCardState extends State<SpanCard> {
     fetchSelected();
   }
 
+  @override
+  void dispose() {
+    tts.stop();
+    super.dispose();
+  }
+
+  TtsController get tts => widget.scm.choreographer.tts;
+
   //get selected choice
   SpanChoice? get selectedChoice {
     if (selectedChoiceIndex == null) return null;
@@ -308,7 +317,7 @@ class WordMatchContent extends StatelessWidget {
                           uniqueKeyForLayerLink: (int index) =>
                               "wordMatch$index",
                           selectedChoiceIndex: controller.selectedChoiceIndex,
-                          tts: controller.widget.scm.choreographer.tts,
+                          tts: controller.tts,
                         ),
                       const SizedBox(height: 12),
                       PromptAndFeedback(controller: controller),

lib/pangea/choreographer/widgets/translation_finished_flow.dart

@@ -89,7 +89,7 @@ class AlternativeTranslations extends StatelessWidget {
       },
       uniqueKeyForLayerLink: (int index) => "altTranslation$index",
       selectedChoiceIndex: null,
-      tts: controller.choreographer.tts,
+      tts: null,
     );
   }
 }

lib/pangea/toolbar/widgets/practice_activity/practice_activity_card.dart

@@ -275,6 +275,7 @@ class PracticeActivityCardState extends State<PracticeActivityCard> {
       // wait for savor the joy before popping from the activity queue
       // to keep the completed activity on screen for a moment
       widget.overlayController.onActivityFinish(currentActivity!.activityType);
+      widget.overlayController.widget.chatController.choreographer.tts.stop();
     } catch (e, s) {
       _onError();
       debugger(when: kDebugMode);