feat(composition): dive world assembled from a selected site definition

The calibration site spawn sat 16 m from the south bounds edge, inside the
40 m warning margin. The vehicle_test recipe now extends the terrain and
playable bounds 42 m to the south so the spawn is inside the zone.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

game/composition/vertical_slice/vertical_slice_root.gd

@@ -29,6 +29,12 @@ const SubmarineTelemetryAdapter = preload(
 const ReferenceBathymetryAcquisition = preload(
 	"res://game/world/sonar/reference_bathymetry_acquisition.gd"
 )
+const DiveSiteDefinition = preload("res://game/domain/sites/dive_site_definition.gd")
+const DiveSite = preload("res://game/world/sites/dive_site.gd")
+const PlayableBoundsRule = preload("res://game/application/sites/playable_bounds_rule.gd")
+const PlayableBoundsStatus = preload(
+	"res://game/application/sites/playable_bounds_status.gd"
+)
 const ProductionInputAdapter = preload(
 	"res://game/infrastructure/input/production_input_adapter.gd"
 )
@@ -51,9 +57,8 @@ const ConfirmationDialogScreen = preload(
 const RebindResult = preload("res://game/application/input/rebind_result.gd")
 
 const MAIN_MENU_SCENE = preload("res://game/presentation/main_menu/main_menu_screen.tscn")
-const VEHICLE_TEST_WORLD_SCENE_PATH := (
-	"res://game/composition/vertical_slice/vehicle_test_world.tscn"
-)
+const DIVE_WORLD_SCENE_PATH := "res://game/composition/vertical_slice/dive_world.tscn"
+const DEFAULT_SITE_PATH := "res://content/sites/vehicle_test.tres"
 const COCKPIT_HUD_SCENE = preload("res://game/presentation/cockpit/cockpit_hud.tscn")
 const SONAR_DISPLAY_SCENE = preload(
 	"res://game/presentation/sonar/sonar_display.tscn"
@@ -87,6 +92,10 @@ var _sonar_service: SonarService
 var _sonar_display: SonarDisplay
 var _latest_update: DiveUpdate
 var _active_world: Node3D
+var _selected_site_path := DEFAULT_SITE_PATH
+var _dive_site: DiveSite
+var _bounds_rule: PlayableBoundsRule
+var _bounds_status: PlayableBoundsStatus
 var _active_screen: Control
 var _active_overlay: Control
 var _vehicle_command_sequence := 0
@@ -105,7 +114,7 @@ func _ready() -> void:
 	_show_main_menu()
 
 
-func _start_vehicle_test() -> void:
+func _start_dive() -> void:
 	var rules = DiveRulesResolver.new().resolve(
 		DiveDifficultyProfile.standard(),
 		DiveUpgradeEffects.new(),
@@ -117,12 +126,29 @@ func _start_vehicle_test() -> void:
 	if not session.is_ready():
 		return
 
-	var world_scene := load(VEHICLE_TEST_WORLD_SCENE_PATH) as PackedScene
+	var definition := load(_selected_site_path) as DiveSiteDefinition
+	if definition == null:
+		push_error("dive site definition %s cannot be loaded" % _selected_site_path)
+		return
+	var definition_error := definition.validation_error()
+	if not definition_error.is_empty():
+		push_error("dive site %s is invalid: %s" % [_selected_site_path, definition_error])
+		return
+	var world_scene := load(DIVE_WORLD_SCENE_PATH) as PackedScene
 	if world_scene == null:
 		return
 	var world := world_scene.instantiate() as Node3D
 	_replace_active_world(world)
+	_dive_site = world.get_node("%DiveSite") as DiveSite
+	var site_error := _dive_site.configure(definition)
+	if not site_error.is_empty():
+		push_error("dive site %s cannot be built: %s" % [_selected_site_path, site_error])
+		_show_main_menu()
+		return
 	_actor = world.get_node("%SubmarineActor") as SubmarineActor
+	_actor.global_transform = _dive_site.spawn_transform()
+	_bounds_rule = PlayableBoundsRule.new(definition.playable_bounds_m)
+	_bounds_status = _bounds_rule.evaluate(_actor.global_position)
 	_camera_controller = world.get_node("%CockpitCameraRig") as CockpitCameraController
 	_instrument_panel = world.get_node("%CockpitInterior") as CockpitInstrumentPanel
 	_hud = COCKPIT_HUD_SCENE.instantiate() as CockpitHud
@@ -154,6 +180,7 @@ func _start_vehicle_test() -> void:
 		_runner.next_sequence()
 	)
 	_hud.present(_latest_update, initial_telemetry)
+	_hud.present_bounds(_bounds_status)
 	_instrument_panel.present(_latest_update, initial_telemetry)
 	_camera_controller.present_telemetry(initial_telemetry)
 	_input_adapter.set_gameplay_enabled(true)
@@ -196,6 +223,8 @@ func _physics_process(delta: float) -> void:
 		return_route
 	)
 	_hud.present(_latest_update, telemetry)
+	_bounds_status = _bounds_rule.evaluate(_actor.global_position)
+	_hud.present_bounds(_bounds_status)
 	_instrument_panel.present(_latest_update, telemetry)
 	_sonar_service.advance(delta)
 	_present_sonar()
@@ -243,6 +272,18 @@ func sonar_display() -> SonarDisplay:
 	return _sonar_display
 
 
+func select_dive_site(definition_path: String) -> void:
+	_selected_site_path = definition_path
+
+
+func dive_site() -> DiveSite:
+	return _dive_site
+
+
+func latest_bounds_status() -> PlayableBoundsStatus:
+	return _bounds_status
+
+
 func _finish_dive_motion() -> void:
 	_dive_terminal = true
 	_input_adapter.set_gameplay_enabled(false)
@@ -444,6 +485,9 @@ func _show_main_menu() -> void:
 	_pilot_use_case = null
 	_telemetry_adapter = null
 	_actor = null
+	_dive_site = null
+	_bounds_rule = null
+	_bounds_status = null
 	_camera_controller = null
 	_instrument_panel = null
 	_hud = null
@@ -457,7 +501,7 @@ func _show_main_menu() -> void:
 	_replace_active_world(null)
 	var screen := MAIN_MENU_SCENE.instantiate() as MainMenuScreen
 	_replace_active_screen(screen)
-	screen.new_game_requested.connect(_start_vehicle_test)
+	screen.new_game_requested.connect(_start_dive)
 	screen.quit_requested.connect(_quit_game)