feat: attach desktop file paths as editable learner chips

components/new-session.tsx

@@ -114,7 +114,7 @@ export function DraftShell({
 	// Tab navigates INTO the composer (owner, keyboard round 2026-10-06):
 	// the only text field on this surface — the cycle's whole chain.
 	const cycleComposer = useCallback((): readonly HTMLElement[] =>
-		Array.from(document.querySelectorAll<HTMLElement>('[data-testid="composer"] textarea')),
+		Array.from(document.querySelectorAll<HTMLElement>('[data-testid="composer"] [data-file-path-input]')),
 		[]);
 	useFieldCycle(cycleComposer);
 	const dictation = useDictation({
@@ -138,7 +138,7 @@ export function DraftShell({
 	};
 	/* Run end focuses the composer (owner, 2026-10-01): the hands are on
 	 * the keyboard from the stop — falling edge of `active` only. */
-	const composerInputRef = useRef<HTMLTextAreaElement>(null);
+	const composerInputRef = useRef<HTMLDivElement>(null);
 	const dictationWasActiveRef = useRef(false);
 	useEffect(() => {
 		if (dictation.active) {