Merge pull request #882 from pangeachat/sentry

Sentry issue fixes

lib/pangea/widgets/chat/overlay_message_text.dart

@@ -142,7 +142,7 @@ class OverlayMessageTextState extends State<OverlayMessageText> {
                   widget.overlayController.onClickOverlayMessageToken(
                     tokenPosition.token!,
                   );
-                  setState(() {});
+                  if (mounted) setState(() {});
                 },
               text: substring,
               style: style.merge(

lib/pangea/widgets/chat/tts_controller.dart

@@ -45,8 +45,8 @@ class TtsController {
 
       await tts.awaitSpeakCompletion(true);
 
-      final voices = await tts.getVoices;
-      availableLangCodes = (voices as List)
+      final voices = (await tts.getVoices) as List?;
+      availableLangCodes = (voices ?? [])
           .map((v) {
             // on iOS / web, the codes are in 'locale', but on Android, they are in 'name'
             final nameCode = v['name']?.split("-").first;