feat(navigator): add go_to_home / go_to_hospital with home_entered / hospital_entered signals

scripts/systems/room_navigator.gd

@@ -1,14 +1,19 @@
-## RoomNavigator — autoload that moves the Camera2D smoothly between hospital floors and rooms.
+## RoomNavigator — autoload that moves the Camera2D smoothly between hospital floors, rooms, and the home/garden area.
 extends Node
 
 signal room_changed(floor_index: int, room_index: int)
+signal home_entered()
+signal hospital_entered()
 
 const FLOOR_HEIGHT: float = 720.0
 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
 
 var _current_floor: int = 0
 var _current_room: int = 0
+var _is_at_home: bool = false
 var _camera: Camera2D
 
 
@@ -23,8 +28,9 @@ func go_to_floor(floor_index: int) -> void:
 func go_to_room(floor_index: int, room_index: int) -> void:
 	if _camera == null:
 		return
-	if floor_index == _current_floor and room_index == _current_room:
+	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 target_x: float = room_index * ROOM_WIDTH + ROOM_WIDTH * 0.5
@@ -36,9 +42,41 @@ func go_to_room(floor_index: int, room_index: int) -> void:
 	tween.finished.connect(func() -> void: room_changed.emit(floor_index, room_index))
 
 
+func go_to_home() -> void:
+	if _camera == null:
+		return
+	if _is_at_home:
+		return
+	_is_at_home = true
+	var tween: Tween = create_tween()
+	tween.set_ease(Tween.EASE_IN_OUT)
+	tween.set_trans(Tween.TRANS_SINE)
+	tween.tween_property(_camera, "position", Vector2(HOME_CAMERA_X, HOME_CAMERA_Y), CAMERA_TWEEN_DURATION)
+	tween.finished.connect(func() -> void: home_entered.emit())
+
+
+func go_to_hospital() -> void:
+	if _camera == null:
+		return
+	if not _is_at_home:
+		return
+	_is_at_home = false
+	var target_x: float = _current_room * ROOM_WIDTH + ROOM_WIDTH * 0.5
+	var target_y: float = _current_floor * -FLOOR_HEIGHT + FLOOR_HEIGHT * 0.5
+	var tween: Tween = create_tween()
+	tween.set_ease(Tween.EASE_IN_OUT)
+	tween.set_trans(Tween.TRANS_SINE)
+	tween.tween_property(_camera, "position", Vector2(target_x, target_y), CAMERA_TWEEN_DURATION)
+	tween.finished.connect(func() -> void: hospital_entered.emit())
+
+
 func get_current_floor() -> int:
 	return _current_floor
 
 
 func get_current_room() -> int:
 	return _current_room
+
+
+func is_at_home() -> bool:
+	return _is_at_home