feat(i18n): convert 38 hardcoded static labels + safe blade wrap + 226 keys

- Convert all remaining static \$modelLabel/\$pluralModelLabel to getter
  methods with __() (AppointmentResource, WorkOrderResource, MasterResource,
  ServiceTemplateResource, LaborResource, and 33 others)
- Safe blade wrap v2 (37 files, 201 wraps): fixed the regex to not match
  `->`, `=>`, `!<` — previous aggressive pass broke @if directives
- Bulk-translate lowercase model-label keys (programări, fișe lucru,
  tehnicieni, șabloane servicii, norme-ore, etc.) — these were the RO
  strings appearing in page titles/breadcrumbs
- Add human RU/EN for mechanic-kpi (Mecanic/Lucrări/Norma ore/etc.)
  and calendar-board words

Tests 306 green. Blade compiles cleanly.

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

resources/views/filament/tenant/part-qr.blade.php

@@ -7,6 +7,6 @@
         @if ($part->article)
             <div class="text-xs text-gray-500 dark:text-gray-400 font-mono">{{ $part->article }}</div>
         @endif
-        <div class="text-xs text-gray-400 mt-1">Payload: <code>{{ $payload }}</code></div>
+        <div class="text-xs text-gray-400 mt-1">{{ __('Payload:') }} <code>{{ $payload }}</code></div>
     </div>
 </div>