Panel icons, trident menu button, Ctrl+Q in dbanner (0.9.4)

- Light theme: panel icons and labels are dark instead of pale grey.
- das-trident icon and das-panel-icon star|trident for the menu button.
- dbanner quits with Ctrl+Q like dprompt ("q" stays on the start screen).
- das-shell 0.4.0, das-theme 0.2.0, das-settings 0.5.0.

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

srcpkgs/das-theme/files/branding/das-trident.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="128" height="128" viewBox="-115.25 0 230.5 230.5" fill="#ffd500" stroke="#2f6fde" stroke-width="7" stroke-linejoin="round" paint-order="stroke">
+
+  <!-- Trident, yellow with a blue outline so it reads on light and dark panels. -->
+<path d="M5.985561 78.82382a104.079383 104.079383 0 0 0 14.053598 56.017033 55 55 0 0 1-13.218774 70.637179A20 20 0 0 0 0 212.5a20 20 0 0 0-6.820384-7.021968 55 55 0 0 1-13.218774-70.637179A104.079383 104.079383 0 0 0-5.98556 78.82382l-1.599642-45.260519A30.103986 30.103986 0 0 1 0 12.5a30.103986 30.103986 0 0 1 7.585202 21.063301zM5 193.624749a45 45 0 0 0 6.395675-53.75496A114.079383 114.079383 0 0 1 0 112.734179a114.079383 114.079383 0 0 1-11.395675 27.13561A45 45 0 0 0-5 193.624749V162.5H5z"/>
+<path id="a" d="M27.779818 75.17546A62.64982 62.64982 0 0 1 60 27.5v145H0l-5-10a22.5 22.5 0 0 1 17.560976-21.95122l14.634147-3.292683a10 10 0 1 0-4.427443-19.503751zm5.998315 34.353887a20 20 0 0 1-4.387889 37.482848l-14.634146 3.292683A12.5 12.5 0 0 0 5 162.5h45V48.265462a52.64982 52.64982 0 0 0-12.283879 28.037802zM42 122.5h10v10H42z"/>
+<use xlink:href="#a" transform="scale(-1 1)"/>
+</svg>

srcpkgs/das-theme/files/gtk/DasOS/gtk-3.0/gtk.css

@@ -13,6 +13,21 @@
   border-top: 1px solid alpha(@panel_fg_color, 0.12);
 }
 
+/* Symbolic panel icons (tray, volume, layout) come out pale grey on the light panel. */
+.xfce4-panel,
+.xfce4-panel button,
+.xfce4-panel image,
+.xfce4-panel button image,
+.xfce4-panel label {
+  color: #1f2430;
+  opacity: 1;
+  -gtk-icon-shadow: none;
+}
+
+.xfce4-panel button:hover {
+  background-color: alpha(#1f2430, 0.1);
+}
+
 /* adw-gtk3 draws white desktop labels with a shadow, made for dark wallpapers. */
 XfdesktopIconView.view {
   color: #1f2430;