feat(save): extend GameState to v2 — outfit and held items persisted per character

- Add held_left/held_right fields to CharacterData
- Add get/set_character_outfit and get/set_character_held_item to GameState
- get_save_data now returns version:2 with character_outfits and character_held_items
- apply_save_data resets both dicts when keys absent (empty-dict reset safe)
- 11 new tests in test_game_state.gd — 147/147 passing

scripts/autoload/GameState.gd

@@ -1,10 +1,12 @@
-## GameState — global game state: character positions, object states, current room.
+## GameState — global game state: character positions, outfit, held items, object states, current room.
 extends Node
 
 signal state_changed
 signal character_moved(character_id: String, position: Vector2)
 
 var _character_positions: Dictionary = {}
+var _character_outfits: Dictionary = {}
+var _character_held_items: Dictionary = {}
 var _object_states: Dictionary = {}
 var current_room: String = "reception"
 var music_volume: float = 0.6
@@ -25,6 +27,28 @@ func set_character_position(id: String, pos: Vector2) -> void:
 	state_changed.emit()
 
 
+func get_character_outfit(id: String) -> Array:
+	return _character_outfits.get(id, ["", "", ""])
+
+
+func set_character_outfit(id: String, outfit: Array) -> void:
+	_character_outfits[id] = outfit
+	state_changed.emit()
+
+
+func get_character_held_item(id: String, hand: String) -> String:
+	if not _character_held_items.has(id):
+		return ""
+	return _character_held_items[id].get(hand, "")
+
+
+func set_character_held_item(id: String, hand: String, item_id: String) -> void:
+	if not _character_held_items.has(id):
+		_character_held_items[id] = {"left": "", "right": ""}
+	_character_held_items[id][hand] = item_id
+	state_changed.emit()
+
+
 func get_object_state(id: String) -> String:
 	return _object_states.get(id, "idle")
 
@@ -40,7 +64,10 @@ func get_save_data() -> Dictionary:
 		var pos: Vector2 = _character_positions[key]
 		positions[key] = [pos.x, pos.y]
 	return {
+		"version": 2,
 		"character_positions": positions,
+		"character_outfits": _character_outfits.duplicate(true),
+		"character_held_items": _character_held_items.duplicate(true),
 		"object_states": _object_states,
 		"current_room": current_room,
 		"music_volume": music_volume,
@@ -55,6 +82,14 @@ func apply_save_data(data: Dictionary) -> void:
 			var val: Variant = data["character_positions"][key]
 			if val is Array and val.size() >= 2:
 				_character_positions[key] = Vector2(val[0], val[1])
+	if data.has("character_outfits"):
+		_character_outfits = data["character_outfits"].duplicate(true)
+	else:
+		_character_outfits = {}
+	if data.has("character_held_items"):
+		_character_held_items = data["character_held_items"].duplicate(true)
+	else:
+		_character_held_items = {}
 	if data.has("object_states"):
 		_object_states = data["object_states"]
 	if data.has("current_room"):