feat: 添加游戏控制和管理功能

- 新增GameControl节点用于统一处理游戏重启和退出
- 添加GameBusManager管理游戏重启时的资源清理
- 修改Pause和GameOver面板使用新的GameControl
- 为EffectController和ItemDropped添加分组管理
- 统一使用WorldManager管理游戏时间

scripts/Statemachine/CycleTimer.gd

@@ -8,10 +8,10 @@ var distance: float = 200
 var bullets: Array[BulletBase] = []
 
 func start():
-	startTime = Time.get_ticks_msec()
+	startTime = WorldManager.getTime()
 	running = true
 func lifetime():
-	return Time.get_ticks_msec() - startTime
+	return WorldManager.getTime() - startTime
 func getStateAngle(index: int):
 	return lifetime() / period * deg_to_rad(360) - deg_to_rad(360.0 * index / len(bullets))
 func forceFilter():

scripts/Statemachine/EffectController.gd

@@ -59,4 +59,5 @@ static func create(scene: PackedScene, spawnPosition: Vector2, parent: Node = nu
 		parent.add_child(cloned)
 	else:
 		WorldManager.rootNode.add_child(cloned)
+	cloned.add_to_group("effects")
 	return cloned

scripts/Statemachine/GameControl.gd

@@ -0,0 +1,25 @@
+extends Control
+class_name GameControl
+
+@onready var returnBtn: Button = $%returnBtn
+@onready var exitBtn: Button = $%exitBtn
+
+func _ready():
+	returnBtn.pressed.connect(
+		func():
+			disable()
+			GameBusManager.restart(get_tree())
+	)
+	exitBtn.pressed.connect(
+		func():
+			disable()
+			get_tree().quit()
+	)
+	enable()
+
+func enable():
+	returnBtn.disabled = false
+	exitBtn.disabled = false
+func disable():
+	returnBtn.disabled = true
+	exitBtn.disabled = true

scripts/Statemachine/GameControl.gd.uid

@@ -0,0 +1 @@
+uid://b63fkg0waovo

scripts/Statemachine/ItemDropped.gd

@@ -64,6 +64,7 @@ static func generate(
 		WorldManager.rootNode.call_deferred("add_child", instance)
 		instance.add_to_group("drops")
 		instance.refindPlayer(WorldManager.tree)
+	instance.add_to_group("items")
 	return instance
 static func getDrops() -> Array[ItemDropped]:
 	var result: Array[ItemDropped] = []