Typing lessons like duolingo & musicmouse cleanup

web/src/hooks/useHomeAssistant.ts

@@ -29,6 +29,11 @@ export function useHomeAssistant(config: HaConfig | null): HomeAssistant {
   // when the patch landed resolves with pre-click data - without this, that stale
   // response clobbers the optimistic "on" back to "off" until the *next* poll catches
   // up, which is what made toggling feel laggy despite the optimistic update existing.
+  //
+  // `usePlayerState`'s `optimistic()` solves the same "local guess vs. eventual truth"
+  // problem far more simply, by just patching the whole object - it can get away with
+  // that because the backend pushes over a websocket rather than being polled, so
+  // there's no in-flight request that can resolve late and stomp on a newer patch.
   const optimisticAt = useRef<Record<string, number>>({});
 
   const entityIds = useMemo(