Handle SessionLost when deleting your own account

Deleting your own account now terminates the session immediately, so the
web UI received a SessionLost rejection and reported "Error deleting
user" for a delete that had succeeded. Use the same branch revoke does.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/web_ui/src/components/UserViewPage.tsx

@@ -146,6 +146,13 @@ export default function UserViewPage() {
 							new lib.UserDeleteRequest(userName)
 						).then(() => {
 							navigate("/users");
+						}, err => {
+							if (err instanceof lib.SessionLost && userName === account.name) {
+								// Got kicked out after deleting our own account
+								navigate("/users");
+								return;
+							}
+							throw err;
 						}).catch(notifyErrorHandler("Error deleting user"));
 					}}
 				>