feat: enhance jobs list stats with tooltips, icons, and refresh count

- Add Tooltip UI component for styled hover tooltips
- Replace native title attributes with Tooltip on all job stats
- Add refresh icon (green) showing actual refreshed count for metadata refresh
- Add icon+tooltip to scanned files stat
- Add icon prop to StatBox component
- Add refreshed field to stats_json types
- Distinct tooltip labels for total links vs refreshed count

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/backoffice/lib/i18n/en.ts

@@ -258,6 +258,7 @@ const en: Record<TranslationKey, string> = {
   "jobRow.thumbnailsGenerated": "{{count}} thumbnails generated",
   "jobRow.metadataProcessed": "{{count}} series processed",
   "jobRow.metadataRefreshed": "{{count}} series refreshed",
+  "jobRow.metadataLinks": "{{count}} links analyzed",
   "jobRow.errors": "{{count}} errors",
   "jobRow.view": "View",
 

apps/backoffice/lib/i18n/fr.ts

@@ -256,6 +256,7 @@ const fr = {
   "jobRow.thumbnailsGenerated": "{{count}} miniatures générées",
   "jobRow.metadataProcessed": "{{count}} séries traitées",
   "jobRow.metadataRefreshed": "{{count}} séries rafraîchies",
+  "jobRow.metadataLinks": "{{count}} liens analysés",
   "jobRow.errors": "{{count}} erreurs",
   "jobRow.view": "Voir",