Provision transporters with hubs

tests/_hangar_menu_preview.gd

@@ -0,0 +1,23 @@
+extends Node
+
+# Visual-only phone preview for the combat-fleet hangar. Logistics
+# transporters deliberately have no card here.
+
+
+func _ready() -> void:
+	GameState.buildings.clear()
+	GameState.extractors.clear()
+	GameState.transporters.clear()
+	GameState.stored_vessels = [
+		GameState.VESSEL_INTERCEPTOR,
+		GameState.VESSEL_SHIELD, GameState.VESSEL_SHIELD,
+	]
+	var main: Node = load("res://Main.tscn").instantiate()
+	add_child(main)
+	main.get_node("AsteroidField").set_process(false)
+	main.get_node("EnemySpawner").set_process(false)
+	main.get_node("Fleet").spawn_ships(3, Vector2.ZERO, PackedStringArray([
+		GameState.VESSEL_INTERCEPTOR, GameState.VESSEL_INTERCEPTOR,
+		GameState.VESSEL_SHIELD,
+	]))
+	main.get_node("BuildController")._on_hangar_pressed()