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/utils/accounts.dart

@@ -78,7 +78,7 @@ class Accounts {
     }
     await Future.wait(
       (accountMode.values.toSet()..retainWhere((i) => !i.activited)).map(
-        (i) => Request.buvidActive(i),
+        Request.buvidActive,
       ),
     );
   }