Add UX enhancements: carousel, filter chips, command palette, and more

data/app.driftwood.Driftwood.gschema.xml

@@ -36,7 +36,7 @@
         <choice value='recently-added'/>
         <choice value='size'/>
       </choices>
-      <default>'name'</default>
+      <default>'recently-added'</default>
       <summary>Library sort mode</summary>
       <description>How to sort the library: name, recently-added, or size.</description>
     </key>

data/resources/style.css

@@ -364,3 +364,28 @@ window.lightbox .lightbox-nav {
 .stat-card image {
     opacity: 0.55;
 }
+
+/* ===== Catalog Row (compact list view) ===== */
+.catalog-row {
+    border: 1px solid alpha(@window_fg_color, 0.08);
+    border-radius: 8px;
+    padding: 0;
+}
+
+.catalog-row:hover {
+    border-color: alpha(@accent_bg_color, 0.4);
+}
+
+/* ===== Skeleton Loading Placeholder ===== */
+.skeleton-card {
+    background: alpha(@card_bg_color, 0.5);
+    border-radius: 12px;
+    min-height: 180px;
+    min-width: 140px;
+    animation: skeleton-pulse 1.5s ease-in-out infinite;
+}
+
+@keyframes skeleton-pulse {
+    0%, 100% { opacity: 0.4; }
+    50% { opacity: 0.7; }
+}