matugen: make GTK4 live-refresh opt-in, off by default. Bump the settle

timeout
fixes #2552

quickshell/Services/PortalService.qml

@@ -97,7 +97,7 @@ Singleton {
         return typeof Theme !== "undefined";
     }
 
-    // Only follow values stable for the settle window — the GTK4-refresh toggle reverts within ~50ms and following it would loop.
+    // Only follow values stable for the settle window — the opt-in GTK4-refresh toggle reverts within ~400ms and following it would loop.
     function evaluateColorScheme() {
         if (!canSyncColorScheme())
             return;
@@ -111,7 +111,7 @@ Singleton {
 
     Timer {
         id: colorSchemeSettleTimer
-        interval: 750
+        interval: 1000
         onTriggered: {
             if (!root.canSyncColorScheme())
                 return;

quickshell/matugen/gtk3-assets/README.md

@@ -0,0 +1,10 @@
+# adw-gtk3 assets
+
+Image assets vendored from [adw-gtk3](https://github.com/lassekongo83/adw-gtk3)
+(`src/assets/`), used by the generated GTK3 light theme
+(`quickshell/matugen/templates/gtk-light-colors.css`, itself derived from
+adw-gtk3's `gtk.css`).
+
+adw-gtk3 is licensed under the GNU Lesser General Public License v2.1 — see
+`LICENSE.adw-gtk3`. These files are covered by that license; the rest of this
+repository remains under its own license.