simplify: dedupe boilerplate and remove dead code across all layers

lib/view/pages/talk/widgets/answer_reference.dart

@@ -17,28 +17,17 @@ class AnswerReference extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var style = ChatBubbleStyles(context);
+    final style = ChatBubbleStyles(context);
+    final isSelf = referenceMessage.actorId == selfId;
+    final accent = isSelf
+        ? style.getSelfStyle(false).color!.withGreen(200)
+        : style.getRemoteStyle(false).color!.withWhite(200);
     return DecoratedBox(
       decoration: BoxDecoration(
-        color: referenceMessage.actorId == selfId
-            ? style
-                  .getSelfStyle(false)
-                  .color!
-                  .withGreen(200)
-                  .withValues(alpha: 0.2)
-            : style
-                  .getRemoteStyle(false)
-                  .color!
-                  .withWhite(200)
-                  .withValues(alpha: 0.2),
+        color: accent.withValues(alpha: 0.2),
         borderRadius: const BorderRadius.all(Radius.circular(5)),
         border: Border(
-          left: BorderSide(
-            color: referenceMessage.actorId == selfId
-                ? style.getSelfStyle(false).color!.withGreen(200)
-                : style.getRemoteStyle(false).color!.withWhite(200),
-            width: 5,
-          ),
+          left: BorderSide(color: accent, width: 5),
         ),
       ),
       child: Padding(
@@ -51,9 +40,7 @@ class AnswerReference extends StatelessWidget {
               maxLines: 1,
               style: TextStyle(
                 overflow: TextOverflow.ellipsis,
-                color: referenceMessage.actorId == selfId
-                    ? style.getSelfStyle(false).color!.withGreen(200)
-                    : style.getRemoteStyle(false).color!.withWhite(200),
+                color: accent,
                 fontSize: 12,
               ),
             ),