fix: make profile dropdown buttons clickable (pointerdown→click)

pointerdown on document was hiding the dropdown before click could fire
on My Account / My Spaces / My Wallets buttons. Switching to click lets
stopPropagation in item handlers prevent premature close.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/components/rstack-identity.ts

@@ -684,7 +684,7 @@ export class RStackIdentity extends HTMLElement {
 				dropdown.classList.toggle("open");
 			});
 
-			document.addEventListener("pointerdown", () => dropdown.classList.remove("open"));
+			document.addEventListener("click", () => dropdown.classList.remove("open"));
 
 			this.#shadow.querySelectorAll("[data-action]").forEach((el) => {
 				el.addEventListener("click", (e) => {