fix(武器平衡): 调整链式机枪伤害值和子弹大小

降低链式机枪伤害范围从5-12改为4-6点
将子弹缩放比例从2调整为1.5

components/Bullets/ChainGun.tscn

@@ -15,7 +15,7 @@ sprite_frames = SubResource("SpriteFrames_cl70o")
 
 [node name="node" type="Sprite2D" parent="texture" index="1"]
 position = Vector2(130, 0)
-scale = Vector2(2, 2)
+scale = Vector2(1.5, 1.5)
 texture = ExtResource("2_4hyk3")
 
 [node name="anchor" type="Node2D" parent="texture/node" index="0"]

components/Weapons/ChainGun.tscn

@@ -28,4 +28,4 @@ text = "400"
 displayName = "链式机枪"
 
 [node name="description" parent="container" index="2"]
-text = "[center]造成[color=cyan]5[/color]→[color=yellow]12[/color]点伤害。[/center]"
+text = "[center]造成[color=cyan]4[/color]→[color=yellow]6[/color]点伤害。[/center]"