feat(FieldShow): 添加实体视图转换功能及新字段

为FieldShow组件添加useViewCast参数和entity引用，支持通过视图转换函数动态计算显示值
新增DROPPED_ITEM_GRAVITY相关字段到FieldStore
调整ItemDropped状态机的物品移动速度计算参数

scripts/Statemachine/FieldShow.gd

@@ -5,11 +5,17 @@ class_name FieldShow
 @export var field: FieldStore.Entity = FieldStore.Entity.MAX_HEALTH
 @export var value: float = 0
 @export var showSign: bool = true
+@export var entity: EntityBase = null
+@export var useViewCast: bool = false
 
 @onready var nameLabel: Label = $"%name"
 @onready var valueLabel: Label = $"%value"
 
 func _ready():
+	if useViewCast:
+		var caster = FieldStore.entityViewCastMap.get(field)
+		if caster:
+			value = caster.call(entity, value)
 	nameLabel.text = FieldStore.entityMap[field]
 	var formattedValue: String
 	var dataType = FieldStore.entityMapType[field]
@@ -21,9 +27,11 @@ func _ready():
 		formattedValue = (MathTool.signBeforeStr(value * 100) if showSign else str(value * 100)) + "%"
 	valueLabel.text = formattedValue
 
-static func create(newField: FieldStore.Entity, newValue: float, newShowSign: bool) -> FieldShow:
+static func create(newField: FieldStore.Entity, newValue: float, newShowSign: bool, newEntity: EntityBase, newUseViewCast: bool) -> FieldShow:
 	var fieldShow = preload("res://components/UI/FieldShow.tscn").instantiate()
 	fieldShow.field = newField
 	fieldShow.value = newValue
 	fieldShow.showSign = newShowSign
+	fieldShow.entity = newEntity
+	fieldShow.useViewCast = newUseViewCast
 	return fieldShow

scripts/Statemachine/ItemDropped.gd

@@ -21,7 +21,7 @@ func _physics_process(_delta):
 			linear_velocity = Vector2.ZERO
 		else:
 			var direction = (targetPlayer.position - position).normalized()
-			var speed = 4000.0 / ((targetPlayer.position - position).length() ** (1 / 3.0))
+			var speed = 5000.0 / ((targetPlayer.position - position).length() ** (1 / 3.0))
 			apply_central_force(direction * speed)
 			if position.distance_to(targetPlayer.position) < 60:
 				targetPlayer.collectItem(item, stackCount)

scripts/Statemachine/UIState.gd

@@ -39,7 +39,7 @@ func _physics_process(_delta):
 		for i in fields.get_children():
 			fields.remove_child(i)
 		for i in player.fields:
-			fields.add_child(FieldShow.create(i, player.fields[i], false))
+			fields.add_child(FieldShow.create(i, player.fields[i], false, player, true))
 		fieldsAnimator.play("show")
 	if Input.is_action_just_released("showFields"):
 		fieldsAnimator.play("hide")