Resolve pending gameplay tickets

tests/test_research_double_tap.gd

@@ -33,6 +33,7 @@ func _initialize() -> void:
 	game_state.buildings.clear()
 	game_state.extractors.clear()
 	game_state.reset_progression()
+	game_state.add_building(GameState.BUILDING_MOTHERSHIP, Vector2.ZERO)
 	main = load("res://world/Main.tscn").instantiate()
 	root.add_child(main)
 	current_scene = main
@@ -92,9 +93,17 @@ func _process(delta: float) -> bool:
 		return _fail("the research panel still has an UnlockButton node")
 	print("the separate buy button is gone from the panel")
 
-	main.get_node("UI/SkillMenu").visible = true
-	tree_view.visible = true
-	tree_view.reset_scroll()
+	# Open through the menu's public API so research has the mothership as its
+	# payment site. Since fleet-held resources became location-aware, merely
+	# forcing the Control visible no longer represents a reachable game state.
+	var mothership_id: int = 0
+	for building in game_state.buildings:
+		if String(building.type) == GameState.BUILDING_MOTHERSHIP:
+			mothership_id = int(building.id)
+			break
+	if mothership_id == 0:
+		return _fail("the test has no mothership research site")
+	main.get_node("UI/SkillMenu").open_for(mothership_id)
 	game_state.unlocked.clear()
 	game_state.research_points = 99
 	game_state.bank_inventory.set_amount(GameState.RESOURCE_ORE, 500)