feat(items): add OutfitItem, tap-to-undress, and outfit refs on Character

- Add OutfitItem (extends HoldableItem): applies outfit on drop within 80px
  of character body, falls back to hand slot attach if no character in range
- Add apply_outfit_item / remove_outfit / _handle_outfit_tap to Character
- Track item node refs in _outfit_item_refs for restoring visibility
- Fix animation state: reset to idle before tap handling in _on_drag_released
- Extract _ITEM_DROP_OFFSET constant (replaces magic Vector2(0,60))
- Add 5 tests in test_outfit_item.gd, 14 new tests in test_character_v2.gd

scripts/characters/character.gd

@@ -13,7 +13,11 @@ signal state_changed(new_state: CharacterData.State)
 
 var _is_held: bool = false
 var _current_anim: String = "idle"
+var _drag_start_position: Vector2 = Vector2.ZERO
+var _outfit_item_refs: Array = [null, null, null]
 
+const _TAP_THRESHOLD: float = 10.0
+const _ITEM_DROP_OFFSET: Vector2 = Vector2(0.0, 60.0)
 const _STATE_COLORS: Dictionary = {
 	CharacterData.State.HEALTHY: Color(0.6, 0.8, 1.0),
 	CharacterData.State.SICK: Color(0.7, 0.9, 0.7),
@@ -149,14 +153,53 @@ func _update_visual_state() -> void:
 		ear_right.color = color
 
 
-func _on_drag_picked_up(_pos: Vector2) -> void:
+func apply_outfit_item(layer: int, item_id: String, texture: Texture2D, item_node: Node2D) -> void:
+	if layer < 1 or layer > 3:
+		return
+	var i: int = layer - 1
+	var existing: Node2D = _outfit_item_refs[i] as Node2D
+	if existing != null:
+		existing.global_position = global_position + _ITEM_DROP_OFFSET
+		existing.visible = true
+	_outfit_item_refs[i] = item_node
+	set_outfit(layer, item_id, texture)
+	if item_node != null:
+		item_node.visible = false
+
+
+func remove_outfit(layer: int) -> void:
+	if layer < 1 or layer > 3:
+		return
+	var i: int = layer - 1
+	clear_outfit(layer)
+	var item_ref: Node2D = _outfit_item_refs[i] as Node2D
+	if item_ref != null:
+		_outfit_item_refs[i] = null
+		item_ref.global_position = global_position + _ITEM_DROP_OFFSET
+		item_ref.visible = true
+
+
+func _handle_outfit_tap() -> void:
+	for layer: int in range(3, 0, -1):
+		if not get_outfit(layer).is_empty():
+			remove_outfit(layer)
+			return
+
+
+func _on_drag_picked_up(pos: Vector2) -> void:
 	_is_held = true
+	_drag_start_position = pos
 	set_animation_state("held")
 	character_picked_up.emit(self)
 
 
 func _on_drag_released(pos: Vector2) -> void:
 	_is_held = false
+	var drag_distance: float = pos.distance_to(_drag_start_position)
+	if drag_distance < _TAP_THRESHOLD:
+		set_animation_state("idle")
+		_handle_outfit_tap()
+		return
 	set_animation_state("idle")
 	if data == null or data.id.is_empty():
 		return