Remove aria-current from session items

Rely on aria-pressed to convey selection state for chat list items.
This simplifies semantics for non-page navigation without affecting
keyboard or screen reader behavior.

Validated via prettier, lint, and build.

Author: PeterDaveHello

src/pages/IndependentPanel/App.jsx

@@ -253,7 +253,6 @@ function App() {
                     role="button"
                     tabIndex={0}
                     aria-pressed={sessionId === session.sessionId}
-                    aria-current={sessionId === session.sessionId ? 'true' : undefined}
                     className={`normal-button chat-list-item ${
                       sessionId === session.sessionId ? 'active' : ''
                     }`}