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/emails/payment-received.blade.php

@@ -16,7 +16,7 @@
         <td style="padding:14px 18px;font-size:18px;text-align:right;font-weight:700;color:#059669;">
             {{ number_format((float) $payment->amount, 2, '.', ' ') }} {{ $currency }}
         </td></tr>
-    <tr><td style="padding:8px 18px;font-size:12px;color:#6b7280;">Metoda</td>
+    <tr><td style="padding:8px 18px;font-size:12px;color:#6b7280;">{{ __('Metoda') }}</td>
         <td style="padding:8px 18px;font-size:12px;text-align:right;">
             {{ \App\Models\Tenant\Payment::METHODS[$payment->method] ?? $payment->method }}
         </td></tr>