tweaks (#1142)

* opt: unused layout

* mod: semantics

* opt: DanmakuMsg type

* opt: avoid cast

* opt: unnecessary_lambdas

* opt: use isEven

* opt: logger

* opt: invalid common page

* tweak

* opt: unify DynController

lib/common/widgets/dyn/ink_well.dart

@@ -980,9 +980,7 @@ class _InkResponseState extends State<_InkResponseStateWidget>
     if (!mounted) {
       return;
     }
-    setState(() {
-      updateFocusHighlights();
-    });
+    setState(updateFocusHighlights);
   }
 
   bool get _shouldShowFocus =>