feat(M03): add environment snapshot facade

src/scenes/sky/wow_sky_controller.gd

@@ -4,6 +4,7 @@ extends Node
 const M2_BUILDER_SCRIPT := preload("res://addons/mpq_extractor/loaders/m2_builder.gd")
 const COORDINATE_MAPPER_SCRIPT := preload("res://src/domain/coordinates/coordinate_mapper.gd")
 const GODOT_WORLD_POSITION_SCRIPT := preload("res://src/domain/coordinates/godot_world_position.gd")
+const WORLD_ENVIRONMENT_SNAPSHOT_SCRIPT := preload("res://src/render/environment/world_environment_snapshot.gd")
 
 const LIGHT_COORD_SCALE := 36.0
 const HALF_MINUTES_PER_DAY := 2880
@@ -133,6 +134,22 @@ func _process(delta: float) -> void:
 	_update_skybox_transform()
 
 
+## Accepts an authoritative time snapshot without moving DBC visual selection out
+## of this controller. Existing fixed-clock behavior is preserved and frozen until
+## another snapshot or explicit local clock configuration is supplied.
+func apply_environment_snapshot(world_environment_snapshot: RefCounted) -> bool:
+	if (
+		world_environment_snapshot == null
+		or world_environment_snapshot.get_script() != WORLD_ENVIRONMENT_SNAPSHOT_SCRIPT
+		or not bool(world_environment_snapshot.get("is_valid"))
+	):
+		return false
+	use_system_time = false
+	time_speed = 0.0
+	fixed_time_hours = float(world_environment_snapshot.get("time_of_day_hours"))
+	return true
+
+
 func _resolve_nodes() -> void:
 	if not world_environment_path.is_empty():
 		_world_environment = get_node_or_null(world_environment_path) as WorldEnvironment