fix(visual): stop fixture window from covering Linux bottom panels

.github/workflows/visual-tray.yml

@@ -222,12 +222,26 @@ jobs:
                       libayatana-appindicator3-1
             # Heavy DEs (KDE, Cinnamon, Budgie) pull hundreds of MB of packages;
             # cache them by package set so subsequent runs skip the download.
+            # execute_install_scripts: true is required because the DE setup
+            # depends on postinstall hooks like glib-compile-schemas — without
+            # it the cached restore leaves gsettings schemas uncompiled and
+            # budgie-daemon/cinnamon-session crash with "Settings schema
+            # 'com.solus-project.budgie-panel' is not installed".
             - name: Install desktop environment (cached)
               if: matrix.cache_apt
               uses: awalsh128/cache-apt-pkgs-action@v1.6.0
               with:
                   packages: ${{ matrix.apt }}
                   version: '1.0'
+                  execute_install_scripts: 'true'
+            # The action's execute_install_scripts only runs a subset of
+            # postinst (e.g. polkitd) — glib-compile-schemas is silently
+            # skipped, so we run it explicitly. Without this, budgie-daemon
+            # and cinnamon-session crash with "Settings schema ... not
+            # installed" on cache restore.
+            - name: Compile glib schemas after cache restore
+              if: matrix.cache_apt
+              run: sudo glib-compile-schemas /usr/share/glib-2.0/schemas/
             - name: Install desktop environment (uncached)
               if: '!matrix.cache_apt'
               env:

tests/visual/fixture/main.js

@@ -47,6 +47,13 @@ mb.on('ready', () => {
       // Force topmost so the screenshot captures our window even when GHA
       // runners pre-launch File Explorer / Notepad windows over the tray area.
       mb.window?.setAlwaysOnTop(true, 'screen-saver');
+      // Move the window away from any OS panel/taskbar. Linux SNI panels
+      // return {0,0,0,0} for tray bounds, so menubar's Positioner falls back
+      // to the bottom-right corner — which on bottom-panel DEs (Budgie,
+      // Cinnamon, KDE) puts our opaque window right on top of the tray icon
+      // and the test can no longer detect it. Moving to a fixed mid-screen
+      // position guarantees no overlap on any platform.
+      mb.window?.setPosition(400, 200);
       // Wait for the WM (especially Mutter on GNOME) to settle the window's
       // final position before querying — getBounds() right after showWindow()
       // returned a stale/intended coord on GNOME while the actual paint was