feat(web): polish catalog motion, empty states, and mobile now-playing

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/widgets/AppShell.module.css

@@ -227,12 +227,33 @@
   color: var(--accent2);
 }
 
+.skip {
+  position: absolute;
+  left: 12px;
+  top: 8px;
+  z-index: 50;
+  padding: 8px 14px;
+  border-radius: 10px;
+  background: var(--elev);
+  color: var(--text);
+  font-weight: 600;
+  text-decoration: none;
+  transform: translateY(-120%);
+}
+
+.skip:focus {
+  transform: none;
+}
+
 .content {
   grid-area: content;
   min-width: 0;
   min-height: 0;
   overflow-y: auto;
   padding: 32px 36px;
+}
+
+.routeIn {
   animation: pipuIn 0.2s ease-out;
 }