web-player: unify primitive link/button rendering, add onEscape action and self-contained AccountMenu

web-player/src/lib/actions/onEscape.ts

@@ -0,0 +1,17 @@
+import type { Action } from 'svelte/action';
+
+export const onEscape: Action<HTMLElement, (() => void) | undefined> = (_node, handler) => {
+	function onKeydown(event: KeyboardEvent) {
+		if (event.key === 'Escape') handler?.();
+	}
+	window.addEventListener('keydown', onKeydown);
+
+	return {
+		update(next) {
+			handler = next;
+		},
+		destroy() {
+			window.removeEventListener('keydown', onKeydown);
+		}
+	};
+};