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/site/payment-success.blade.php

@@ -16,7 +16,7 @@
     <h1>{{ __('Plată reușită!') }}</h1>
     <p style="color:#6b7280;">Factura {{ $sub->invoice_number ?? '#' . $sub->id }} a fost achitată.</p>
     <p style="color:#6b7280;font-size:13px;margin-top:8px;">{{ __('Abonamentul tău a fost extins.') }}</p>
-    <a href="/app" class="btn">→ Mergi la AutoCRM</a>
+    <a href="/app" class="btn">{{ __('→ Mergi la AutoCRM') }}</a>
 </div>
 </body>
 </html>