feat(nav): wire RoomNavigator to GameState.set_current_room and add room name lookup

scripts/systems/room_navigator.gd

@@ -10,6 +10,21 @@ const ROOM_WIDTH: float = 1280.0
 const HOME_CAMERA_X: float = 640.0
 const HOME_CAMERA_Y: float = 1080.0
 const CAMERA_TWEEN_DURATION: float = 0.6
+const HOME_ROOM_NAME: String = "garden_party"
+
+const _ROOM_NAMES: Dictionary = {
+	Vector2i(0, 0): "reception",
+	Vector2i(0, 1): "giftshop",
+	Vector2i(0, 2): "restaurant",
+	Vector2i(0, 3): "emergency",
+	Vector2i(1, 0): "xray",
+	Vector2i(1, 1): "pharmacy",
+	Vector2i(1, 2): "lab",
+	Vector2i(1, 3): "patient_rooms",
+	Vector2i(2, 0): "ultrasound",
+	Vector2i(2, 1): "delivery_room",
+	Vector2i(2, 2): "nursery",
+}
 
 var _current_floor: int = 0
 var _current_room: int = 0
@@ -27,13 +42,16 @@ func go_to_floor(floor_index: int) -> void:
 
 
 func go_to_room(floor_index: int, room_index: int) -> void:
-	if _camera == null:
-		return
 	if not _is_at_home and floor_index == _current_floor and room_index == _current_room:
 		return
 	_is_at_home = false
 	_current_floor = floor_index
 	_current_room = room_index
+	var room_name: String = _ROOM_NAMES.get(Vector2i(floor_index, room_index), "")
+	if not room_name.is_empty():
+		GameState.set_current_room(room_name)
+	if _camera == null:
+		return
 	var target_x: float = room_index * ROOM_WIDTH + ROOM_WIDTH * 0.5
 	var target_y: float = floor_index * -FLOOR_HEIGHT + FLOOR_HEIGHT * 0.5
 	if _active_tween != null:
@@ -46,11 +64,12 @@ func go_to_room(floor_index: int, room_index: int) -> void:
 
 
 func go_to_home() -> void:
-	if _camera == null:
-		return
 	if _is_at_home:
 		return
 	_is_at_home = true
+	GameState.set_current_room(HOME_ROOM_NAME)
+	if _camera == null:
+		return
 	if _active_tween != null:
 		_active_tween.kill()
 	_active_tween = create_tween()
@@ -61,11 +80,14 @@ func go_to_home() -> void:
 
 
 func go_to_hospital() -> void:
-	if _camera == null:
-		return
 	if not _is_at_home:
 		return
 	_is_at_home = false
+	var room_name: String = _ROOM_NAMES.get(Vector2i(_current_floor, _current_room), "")
+	if not room_name.is_empty():
+		GameState.set_current_room(room_name)
+	if _camera == null:
+		return
 	var target_x: float = _current_room * ROOM_WIDTH + ROOM_WIDTH * 0.5
 	var target_y: float = _current_floor * -FLOOR_HEIGHT + FLOOR_HEIGHT * 0.5
 	if _active_tween != null:
@@ -77,6 +99,20 @@ func go_to_hospital() -> void:
 	_active_tween.finished.connect(func() -> void: hospital_entered.emit())
 
 
+func go_to_room_by_name(room_name: String) -> void:
+	if room_name == HOME_ROOM_NAME:
+		go_to_home()
+		return
+	for key: Vector2i in _ROOM_NAMES:
+		if _ROOM_NAMES[key] == room_name:
+			go_to_room(key.x, key.y)
+			return
+
+
+func get_room_name(floor_index: int, room_index: int) -> String:
+	return _ROOM_NAMES.get(Vector2i(floor_index, room_index), "")
+
+
 func get_current_floor() -> int:
 	return _current_floor
 

test/unit/test_room_navigator.gd

@@ -74,13 +74,13 @@ func test_go_to_floor_does_not_emit_if_already_on_floor_room_zero() -> void:
 	assert_signal_not_emitted(_nav, "room_changed")
 
 
-func test_initialize_with_null_camera_prevents_state_update() -> void:
+func test_initialize_with_null_camera_still_updates_state() -> void:
 	var nav: Node = RoomNavigatorScript.new()
 	add_child_autofree(nav)
 	nav.initialize(null)
 	nav.go_to_room(1, 2)
-	assert_eq(nav.get_current_floor(), 0)
+	assert_eq(nav.get_current_floor(), 1)
-	assert_eq(nav.get_current_room(), 0)
+	assert_eq(nav.get_current_room(), 2)
 
 
 func test_multiple_room_changes_update_state() -> void:
@@ -138,3 +138,40 @@ func test_go_to_room_after_home_clears_is_at_home() -> void:
 	_nav.go_to_home()
 	_nav.go_to_room(0, 0)
 	assert_false(_nav.is_at_home())
+
+
+func test_room_names_dict_has_eleven_entries() -> void:
+	assert_eq(RoomNavigator._ROOM_NAMES.size(), 11)
+
+
+func test_get_room_name_floor0_room0_is_reception() -> void:
+	assert_eq(RoomNavigator.get_room_name(0, 0), "reception")
+
+
+func test_get_room_name_floor0_room3_is_emergency() -> void:
+	assert_eq(RoomNavigator.get_room_name(0, 3), "emergency")
+
+
+func test_get_room_name_floor1_room2_is_lab() -> void:
+	assert_eq(RoomNavigator.get_room_name(1, 2), "lab")
+
+
+func test_get_room_name_floor2_room1_is_delivery_room() -> void:
+	assert_eq(RoomNavigator.get_room_name(2, 1), "delivery_room")
+
+
+func test_get_room_name_unknown_returns_empty_string() -> void:
+	assert_eq(RoomNavigator.get_room_name(99, 0), "")
+	assert_eq(RoomNavigator.get_room_name(0, 99), "")
+
+
+func test_go_to_room_by_name_garden_party_sets_is_at_home() -> void:
+	RoomNavigator.go_to_room_by_name("garden_party")
+	assert_true(RoomNavigator.is_at_home())
+	RoomNavigator._is_at_home = false
+
+
+func test_go_to_room_by_name_unknown_is_noop() -> void:
+	var floor_before: int = RoomNavigator.get_current_floor()
+	RoomNavigator.go_to_room_by_name("nonexistent_room_xyz")
+	assert_eq(RoomNavigator.get_current_floor(), floor_before)