user [nfc]: Note places lacking live-update where senderDisplayName helps

Author: gnprice

lib/widgets/lightbox.dart

@@ -178,7 +178,7 @@ class _LightboxPageLayoutState extends State<_LightboxPageLayout> {
             child: RichText(
               text: TextSpan(children: [
                 TextSpan(
-                  text: '${widget.message.senderFullName}\n',
+                  text: '${widget.message.senderFullName}\n', // TODO(#716): use `store.senderDisplayName`
 
                   // Restate default
                   style: themeData.textTheme.titleLarge!.copyWith(color: appBarForegroundColor)),

lib/widgets/message_list.dart

@@ -1352,7 +1352,7 @@ class MessageWithPossibleSender extends StatelessWidget {
                     userId: message.senderId),
                   const SizedBox(width: 8),
                   Flexible(
-                    child: Text(message.senderFullName, // TODO get from user data
+                    child: Text(message.senderFullName, // TODO(#716): use `store.senderDisplayName`
                       style: TextStyle(
                         fontSize: 18,
                         height: (22 / 18),