Add SPDX license ID

Author: malfisya

ui/pages/donation.slint

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: Copyright © 2025 Muhammad Alfi Syahrin
+//
+// SPDX-License-Identifier: MPL-2.0
+
 import { StandardButton, VerticalBox, Button, HorizontalBox, Spinner, StyleMetrics, Palette, GridBox, CheckBox } from "std-widgets.slint";
 import { Images } from "../components/images.slint";
 import { Callbacks} from "../components/callbacks.slint";