feat(teapot): add TeaPot with tap-to-pour tilt animation

scripts/objects/tea_pot.gd

@@ -0,0 +1,37 @@
+## TeaPot — tap to pour: tilts 45 degrees, holds briefly, then returns to upright.
+class_name TeaPot extends Node2D
+
+enum State { IDLE, POURING }
+
+const TILT_ANGLE: float = 45.0
+const TILT_DURATION: float = 0.4
+const POUR_HOLD: float = 0.8
+const RETURN_DURATION: float = 0.4
+const BUTTON_HALF_SIZE: float = 40.0
+
+var _state: State = State.IDLE
+
+
+func _input(event: InputEvent) -> void:
+	if _state != State.IDLE:
+		return
+	if not event is InputEventScreenTouch:
+		return
+	var touch: InputEventScreenTouch = event as InputEventScreenTouch
+	if not touch.pressed:
+		return
+	var local: Vector2 = to_local(touch.position)
+	if abs(local.x) > BUTTON_HALF_SIZE or abs(local.y) > BUTTON_HALF_SIZE:
+		return
+	_start_pouring()
+
+
+func _start_pouring() -> void:
+	_state = State.POURING
+	var tween: Tween = create_tween()
+	tween.set_ease(Tween.EASE_IN_OUT)
+	tween.set_trans(Tween.TRANS_SINE)
+	tween.tween_property(self, "rotation_degrees", TILT_ANGLE, TILT_DURATION)
+	tween.tween_interval(POUR_HOLD)
+	tween.tween_property(self, "rotation_degrees", 0.0, RETURN_DURATION)
+	tween.finished.connect(func() -> void: _state = State.IDLE)