T10a feedback: toasts with undo and a hover-held clock, notifications and their center, alert, banner, callout, inline and status messages, empty state; root focus scopes take lost focus

assets/icons/search-x.svg

@@ -0,0 +1,18 @@
+<!-- @license lucide-static v1.48.0 - ISC -->
+<svg
+  class="lucide lucide-search-x"
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="m13.5 8.5-5 5" />
+  <path d="m8.5 8.5 5 5" />
+  <circle cx="11" cy="11" r="8" />
+  <path d="m21 21-4.3-4.3" />
+</svg>