settings: one snackbar for every page's messages

Save, apply and upload results went to the page header, one line capped
at 420px and cut with an ellipsis. They now go to a snackbar at the foot
of the settings window, wrapped in full: green fades after 6s, yellow and
red stay until dismissed or replaced, and changing page clears it.

Snack.qml is the singleton pages call (ok, wait, error); Snackbar.qml
draws it once in Settings.qml. SaveBar forwards its notice and error, so
the 24 pages using it change nothing; the header keeps only the draft's
state. The boot logo page calls Snack directly.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/desktop/Snack.qml b/desktop/Snack.qml
new file mode 100644
index 0000000..b955ad2
--- /dev/null
+++ b/desktop/Snack.qml
@@ -0,0 +1,41 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+pragma Singleton
+
+import Quickshell
+import QtQuick
+
+// The settings window's one message, shown by Snackbar.qml at the foot of the
+// window: what a save, an apply or an upload said. A page calls ok(), wait()
+// or error(); a new message replaces the last. ok() fades by itself, wait()
+// and error() stay until dismissed or replaced. SaveBar forwards its notice
+// and error here, so a page using it needs nothing more.
+Singleton {
+    id: root
+
+    property string text: ""
+    property color color: Theme.green
+    property bool sticky: false
+    // Bumped on every show, so the same text twice restarts the fade.
+    property int serial: 0
+
+    function show(text, color, sticky) {
+        root.text = text;
+        root.color = color;
+        root.sticky = !!sticky;
+        root.serial++;
+    }
+    function ok(text) { root.show(text, Theme.green, false); }
+    function wait(text) { root.show(text, Theme.yellow, true); }
+    function error(text) { root.show(text, Theme.red, true); }
+    function clear() { root.text = ""; }
+}