Context bar: defer OSC7 cwd update out of render phase (was dropped)

The OSC 7 handler runs synchronously inside term.write() as PTY data is
processed, which can coincide with React's render phase — calling the
parent setState there warned 'cannot update while rendering' and the
liveCwd update was dropped, so claude panes never registered their cwd
and the bar never showed (backend data + match were fine). Defer the
onCwd call via queueMicrotask. Plus a TEMP per-pane match-decision log.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/XtermPane.tsx

@@ -224,7 +224,12 @@ export default function XtermPane({
         } catch {
           /* leave raw if it isn't valid percent-encoding */
         }
-        onCwdRef.current?.(path);
+        // Defer out of term.write()'s synchronous path: OSC handlers run while
+        // xterm processes PTY data, which can coincide with React's render
+        // phase — calling the parent's setState directly there triggers a
+        // "cannot update while rendering" warning and the update gets dropped.
+        const reported = path;
+        queueMicrotask(() => onCwdRef.current?.(reported));
       }
       return true;
     });