Complete M11 Creator Studio and M12 Trust & Safety for PC5

- Creator Studio: Visual behavior & property inspector, GLB model importer, binary persistence
- Trust & Safety: 18+ TOS confirmation (DOB removed), creator guidelines & briefing card on join, in-game reporting HUD
- Test Harness: Add --filter, --skip-backend, --skip-godot to run_checkpoint_tests.py

scripts/editor/tools/transform_tool.gd

@@ -35,6 +35,11 @@ func apply(core: EditorCore, args: Dictionary) -> Variant:
 		"scale":
 			return _apply_vector3(core, object_id, args.get("value", obj.scale),
 				obj.scale, "Scale", core.model.set_object_scale_raw)
+		"property":
+			var key: String = str(args.get("key", ""))
+			var new_val: Variant = args.get("value")
+			var old_val: Variant = obj.properties.get(key, null)
+			return _apply_property(core, object_id, key, new_val, old_val)
 		_:
 			push_error("TransformTool: unknown op '%s'" % op)
 			return false
@@ -60,3 +65,12 @@ func _apply_vector4(core: EditorCore, object_id: String, new_value: Vector4,
 	core.undo_redo.add_undo(setter.bind(object_id, old_value))
 	core.undo_redo.commit()
 	return true
+
+
+func _apply_property(core: EditorCore, object_id: String, key: String,
+		new_value: Variant, old_value: Variant) -> bool:
+	core.undo_redo.begin("Set property '%s' on '%s'" % [key, object_id])
+	core.undo_redo.add_do(core.model.set_object_property_raw.bind(object_id, key, new_value))
+	core.undo_redo.add_undo(core.model.set_object_property_raw.bind(object_id, key, old_value))
+	core.undo_redo.commit()
+	return true