fix(movement): drop idle FUNC_WAIT resend with no 40250 counterpart

40250 only calls OnWaiting inside CInstanceBase::Transform() while
IsWalking() (InstanceBase.cpp:1922-1930); it never resends position
while standing. Remove _tick_on_waiting and its throttle state.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

project/netplay_test.gd

@@ -623,6 +623,10 @@ func _run() -> void:
 	_ck(fc.calls.move.size() == 2 and fc.calls.move[1][0] == np.FUNC_MOVE, "OnMoving after 300ms -> FUNC_MOVE")
 	pc.anim_state.emit("wait")                        # OnStop
 	_ck(fc.calls.move.size() == 3 and fc.calls.move[2][0] == np.FUNC_WAIT, "OnStop -> FUNC_WAIT")
+	# 站立期间被推开也不补发：40250 的 OnWaiting 只在走/跑动作中触发（InstanceBase.cpp:1930）。
+	pc.player.position = Vector3(4, 0, -1)
+	np._process(0.2)
+	_ck(fc.calls.move.size() == 3, "idle displacement sends no FUNC_WAIT")
 	fc.calls.move.clear()
 	np.on_use_skill(5, 2)                             # OnUseSkill
 	_ck(fc.calls.move.size() == 1 and fc.calls.move[0][0] == (np.FUNC_SKILL | 5) and fc.calls.move[0][1] == 2,