[client] input: synchronize host lock state over LGMP

Cache native keyboard lock state across input-provider transitions and
reconcile it with HID LED feedback over LGMP.

Project raw and corrective lock-key transitions through the reliable
input FIFO, defer correction until outstanding transitions settle, and
recover from delayed or missing feedback without double toggling.

client/src/app.c

@@ -655,9 +655,6 @@ void app_handleKeyboardLEDs(bool numLock, bool capsLock, bool scrollLock)
   if (evdev_isExclusive())
     return;
 
-  if (!core_inputEnabled())
-    return;
-
   if (!lgInput_keyboardLEDs(numLock, capsLock, scrollLock))
     DEBUG_ERROR("app_handleKeyboardLEDs: failed to send message");
 }