feat(trails): render authoritative player route trails

docs/UI_STYLE.md

@@ -110,6 +110,9 @@ are not MVP requirements.
   It opens a confirmation modal; a player match, including a finished result,
   warns that it returns everyone to the waiting lobby, while observer and
   waiting-lobby departures explain that only this browser's place is released.
+- Trails are dotted passage-center lines beneath maze objects and hedges: Player
+  1 uses the established yellow dot rhythm, Player 2 uses a distinct blue
+  rhythm, and shared passages draw both rhythms on one centerline.
 - A compact response indicator between the connection state and gear shows a
   rounded total response time or an explicit unknown, stale, or offline state.
   Its accessible description and settings details expose `Отклик`, `Связь`,