ElyMark: each print job logs its outcome; the test checks both jobs (M-04)

The window test now saves print jobs to a file (ELY_PRINT_TO) and
requires two distinct jobs printed ok and readable PDF text, not
a count of Chromium's log lines. It runs on macOS only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/ely-mark/src/export.rs

@@ -332,6 +332,7 @@ impl Desk {
         let heard = cx.subscribe(&view, move |desk, view, event: &Event, cx| match event {
             Event::Loaded => view.read(cx).print_pdf(&job.pdf),
             Event::Printed(path, ok) => {
+                log::info!("mark: job {n} printed {}, ok {ok}", path.display());
                 desk.printing.remove(&n);
                 let printed = ok
                     .then(|| path.clone())