feat(scenarios): add detail page, comfortable DescriptionList layout, and environment card refactor

- Add ScenarioDetailPage with DescriptionList, steps table, run/delete actions
- Add /scenarios/:id route
- Add i18n keys for scenario detail fields, steps columns, and 404 error
- Add 'comfortable' and 'inline' layout variants to DescriptionList (with compact as default stacked)
- Apply layout="comfortable" to session, environment, and scenario detail pages
- Apply layout="compact" to EnvironmentsPage card DescriptionList
- Refactor EnvironmentsPage card to use ContextMenu (view/edit/delete) with icons
- Add ScenariosPage clickable rows, Play icon (primary) and Trash2 icon (danger) action buttons
- Add Page.module.css sectionHeading and stepsSection utility classes
- Fix Notification.tsx and Table.tsx formatting (prettier)

client/src/ui/Table/Table.tsx

@@ -82,7 +82,9 @@ export function Table<T>({
             visibleData.map((row) => (
               <tr
                 key={rowKey(row)}
-                className={[styles.tr, onRowClick ? styles.clickable : ''].filter(Boolean).join(' ')}
+                className={[styles.tr, onRowClick ? styles.clickable : '']
+                  .filter(Boolean)
+                  .join(' ')}
                 onClick={onRowClick ? () => onRowClick(row) : undefined}
               >
                 {columns.map((col) => (