Open a result by clicking anywhere on its card

Drop the Open button: the title's hit area now covers the whole card,
with Retry kept on top so it doesn't open the preview.

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

src/pages/Results.tsx

@@ -132,10 +132,7 @@ function ContentCard({ material: m, onOpen }: { material: Material; onOpen: () =
           <span title={describeRule(m.rule)}>{describeRule(m.rule)}</span>
           {working
             ? <span>{m.video ? t('res.videoProgress', { n: m.video.progress }) : t('res.working')}</span>
-            : <div className="content-card-actions">
-                {m.retry && <RetryButton material={m} className="text-btn" />}
-                <button className="text-btn" onClick={onOpen}>{t('res.open')} <Icon name="arrow-right" /></button>
-              </div>}
+            : m.retry && <div className="content-card-actions"><RetryButton material={m} className="text-btn" /></div>}
         </div>
       </div>
     </article>