feat(武器): 调整链式机枪属性和位置

- 修改链式机枪的伤害范围和攻击力
- 调整子弹纹理位置和缩放比例
- 为武器添加商店属性
- 修复武器移动时的空指针问题
- 更新公鸡角色的初始武器配置

components/Bullets/ChainGun.tscn

@@ -14,7 +14,8 @@ lifeTime = 50.0
 sprite_frames = SubResource("SpriteFrames_cl70o")
 
 [node name="node" type="Sprite2D" parent="texture" index="1"]
-position = Vector2(74, 0)
+position = Vector2(130, 0)
+scale = Vector2(2, 2)
 texture = ExtResource("2_4hyk3")
 
 [node name="anchor" type="Node2D" parent="texture/node" index="0"]

components/Characters/Rooster.tscn

@@ -1,10 +1,11 @@
-[gd_scene load_steps=15 format=3 uid="uid://bm7ymrri6pykb"]
+[gd_scene load_steps=16 format=3 uid="uid://bm7ymrri6pykb"]
 
 [ext_resource type="PackedScene" uid="uid://cvogxi7mktumf" path="res://components/Abstracts/EntityBase.tscn" id="1_e5pl8"]
 [ext_resource type="Script" path="res://scripts/Contents/Characters/Rooster.gd" id="2_oqdqd"]
 [ext_resource type="Texture2D" uid="uid://fn8qx72clh38" path="res://resources/characters/cock/rooster-a.svg" id="2_q0j6j"]
 [ext_resource type="AudioStream" uid="uid://dclinyhu256xi" path="res://resources/sounds/effect/Low Whoosh.mp3" id="3_4syso"]
 [ext_resource type="Texture2D" uid="uid://ci2ik43ce82uy" path="res://resources/characters/cock/rooster-b.svg" id="3_b0fgx"]
+[ext_resource type="PackedScene" uid="uid://dlaks67h2osms" path="res://components/Weapons/ChainGun.tscn" id="3_inwol"]
 [ext_resource type="PackedScene" uid="uid://c0n3igy4hucrg" path="res://components/Weapons/PurpleCrystal.tscn" id="3_ms5sq"]
 [ext_resource type="AudioStream" uid="uid://cdrevrq7n6yqa" path="res://resources/sounds/effect/Boing.mp3" id="4_66s6c"]
 [ext_resource type="AudioStream" uid="uid://benyec5bqni0b" path="res://resources/sounds/effect/Chomp.wav" id="4_k0yme"]
@@ -45,10 +46,13 @@ displayName = "公鸡"
 [node name="weaponStore" parent="." index="0"]
 process_mode = 4
 
-[node name="PurpleCrystal" parent="weaponStore" index="0" instance=ExtResource("3_ms5sq")]
+[node name="ChainGun" parent="weaponStore" index="0" instance=ExtResource("3_inwol")]
+offset_bottom = 330.0
+
+[node name="PurpleCrystal" parent="weaponStore" index="1" instance=ExtResource("3_ms5sq")]
 debugRebuild = false
 
-[node name="VectorStar" parent="weaponStore" index="1" instance=ExtResource("6_fvy5n")]
+[node name="VectorStar" parent="weaponStore" index="2" instance=ExtResource("6_fvy5n")]
 debugRebuild = false
 
 [node name="sprint" parent="sounds" index="0"]

components/Weapons/ChainGun.tscn

@@ -9,9 +9,11 @@ script = ExtResource("2_ponmu")
 avatarTexture = ExtResource("2_ghn43")
 displayName = "链式机枪"
 costBeachball = 400
+store = {
+"atk": 5
+}
 needEnergy = 1.0
 cooldown = 66.0
-debugRebuild = true
 
 [node name="avatar" parent="container/info" index="0"]
 texture = ExtResource("2_ghn43")
@@ -26,4 +28,4 @@ text = "400"
 displayName = "链式机枪"
 
 [node name="description" parent="container" index="2"]
-text = "[center]造成[color=cyan]10[/color]→[color=yellow]7[/color]点伤害。[/center]"
+text = "[center]造成[color=cyan]5[/color]→[color=yellow]12[/color]点伤害。[/center]"

scripts/Structs/Weapon.gd

@@ -48,7 +48,7 @@ func _ready():
 		func():
 			if soulLevel > WeaponName.SoulLevel.NORMALIZE:
 				UIState.player.getItem({
-					ItemStore.ItemType.SOUL: soulLevel
+					ItemStore.ItemType.SOUL: soulLevel - 1
 				})
 				soulLevel -= 1
 				updateStore(level, UIState.player)
@@ -66,19 +66,21 @@ func _ready():
 	)
 	moveLeftBtn.pressed.connect(
 		func():
-			var myIndex = get_index()
-			var leftIndex = max(myIndex - 1, 0)
-			get_parent().move_child(self, leftIndex)
-			ArrayTool.swap(UIState.player.weapons, myIndex, leftIndex)
-			UIState.player.rebuildWeaponIcons()
+			if get_parent():
+				var myIndex = get_index()
+				var leftIndex = max(myIndex - 1, 0)
+				get_parent().move_child(self, leftIndex)
+				ArrayTool.swap(UIState.player.weapons, myIndex, leftIndex)
+				UIState.player.rebuildWeaponIcons()
 	)
 	moveRightBtn.pressed.connect(
 		func():
-			var myIndex = get_index()
-			var rightIndex = min(myIndex + 1, get_parent().get_child_count() - 1)
-			get_parent().move_child(self, rightIndex)
-			ArrayTool.swap(UIState.player.weapons, myIndex, rightIndex)
-			UIState.player.rebuildWeaponIcons()
+			if get_parent():
+				var myIndex = get_index()
+				var rightIndex = min(myIndex + 1, get_parent().get_child_count() - 1)
+				get_parent().move_child(self, rightIndex)
+				ArrayTool.swap(UIState.player.weapons, myIndex, rightIndex)
+				UIState.player.rebuildWeaponIcons()
 	)
 	for i in sounds.get_children():
 		i.process_mode = ProcessMode.PROCESS_MODE_ALWAYS