i18n(reports): wrap Anul curent + auto-translate specialization tokens

- Reports.php periods() had 'this_year' hardcoded; now wrapped in __()
- masters tab specialization cell: split by '/' and __()-translate each
  token so 'Motor / Cutie viteze' auto-renders as «Двигатель / КПП»
  on RU (and 'Engine / Gearbox' on EN). Users can enter any free-text
  specialisation; the common keywords now have RU/EN translations.
- +12 specialisation vocabulary entries (Motor, Frâne, Suspensie,
  Anvelope, Cutie viteze, Electrică, Diagnosticare, Vopsitorie,
  Tinichigerie, Aer condiționat, Roți, Ambreiaj).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Pages/Reports.php

@@ -62,7 +62,7 @@ class Reports extends Page
             'this_week' => __('Săptămâna curentă'),
             'this_month' => __('Luna curentă'),
             'last_month' => __('Luna trecută'),
-            'this_year' => 'Anul curent',
+            'this_year' => __('Anul curent'),
         ];
     }