Save The Tree implementation and acceptance work in progress

Preserve production code, regression fixtures, audio assets and provenance, test infrastructure, and the original-completion plan and progress ledger. Final game and Windows acceptance remain pending; excluded local artifacts and native experiments are not part of this snapshot.

tests/ui/test_staff_management.gd

@@ -1,4 +1,5 @@
 extends SceneTree
+const FixtureCleanup := preload("res://tests/helpers/ui_audio_fixture_cleanup.gd")
 
 ## Real Runtime commands through the staff panel controls, including queued
 ## assignment, draft preservation, a rejected role, and pending Save restoration.
@@ -268,7 +269,11 @@ func _test_navigation_and_layout() -> void:
 
 
 func _test_restored_opening_does_not_pause() -> void:
-	_main.queue_free()
+	var _audio_cleanup_transition: Dictionary = await _cleanup_fixture_owner(_main, "restored-transition")
+	if not bool(_audio_cleanup_transition.get(&"passed", false)):
+		push_error("Ordinary fixture audio cleanup failed: %s" % str(_audio_cleanup_transition))
+		quit(96)
+		return
 	await process_frame
 	_clock.reset(1, 6, 0)
 	var state: Variant = root.get_node("GameState")
@@ -320,7 +325,11 @@ func _finish() -> void:
 	if not _save_path.is_empty():
 		SaveService.delete_save(_save_path)
 	if is_instance_valid(_main):
-		_main.queue_free()
+		var _audio_cleanup_final: Dictionary = await _cleanup_fixture_owner(_main, "finish")
+		if not bool(_audio_cleanup_final.get(&"passed", false)):
+			push_error("Ordinary fixture audio cleanup failed: %s" % str(_audio_cleanup_final))
+			quit(96)
+			return
 	print("Staff management UI: %d checks, %d failures" % [_checks, _failures])
 	quit(1 if _failures > 0 else 0)
 
@@ -378,6 +387,8 @@ func _test_drag_assignment() -> void:
 
 
 func _drag_staff_to(target: Vector2, cell: Variant = null, before_release := Callable()) -> void:
+	# Let restored roster layout finish before reading the card to press.
+	await process_frame
 	var source: Button = _panel.roster_buttons[&"staff_akane"]
 	var start := source.get_global_rect().get_center()
 	var motion := InputEventMouseMotion.new()
@@ -600,3 +611,18 @@ func _test_drag_defense_lock(register_objective := true) -> void:
 	SaveService.delete_save(path)
 	_expect(_runtime.restore_snapshot(before), "restore fixture after defense boundary")
 	_panel.refresh()
+
+
+## QA-only control proof routing for sequential ordinary Main owners.
+## The old02cd/6be99 helpers and original Clock/Runtime values stay exact.
+func _cleanup_fixture_owner(owner: Node, phase: String) -> Dictionary:
+	var original_control: String = OS.get_environment("THE_TREE_AUDIO_FIXTURE_CONTROL_PROOF")
+	if original_control.is_empty() or not original_control.is_absolute_path():
+		return {&"passed": false, &"reason": "fresh absolute owned control proof required"}
+	var phase_control: String = original_control.get_basename() + "-" + phase + ".json"
+	if FileAccess.file_exists(phase_control):
+		return {&"passed": false, &"reason": "ordinary owner control proof overwrite forbidden"}
+	OS.set_environment("THE_TREE_AUDIO_FIXTURE_CONTROL_PROOF", phase_control)
+	var report: Dictionary = await FixtureCleanup.free_owner_and_wait(self, owner)
+	OS.set_environment("THE_TREE_AUDIO_FIXTURE_CONTROL_PROOF", original_control)
+	return report