SSR cockpit and dashboard tiles: info button with tooltip

Every tile of the module and the three SSR dashboard widgets has a round question mark button top right. Hovering it or focusing it with the keyboard shows a tooltip that explains what the tile shows. Pure CSS, anchored to the card so it never leaves the tile.

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

packages/vitec/Classes/Widgets/SsrStatusWidget.php

@@ -84,7 +84,10 @@ final class SsrStatusWidget implements WidgetInterface, AdditionalCssInterface
         }
 
         $html .= '<div class="vcw-foot">' . $h::moduleLink() . '</div>';
-        return $h::wrap($html);
+        return $h::wrap($html, 'Live state of the SSR node on the VPS: whether it answers and how fast, '
+            . 'how full its page cache is against the limit, whether SSR delivery is switched on, which frontend '
+            . 'release runs, and the most recent cache purge. The link opens the cockpit with charts, protocol '
+            . 'and the purge and warm buttons.', 'status');
     }
 
     public function getOptions(): array