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/pages/ai-assistant.blade.php

@@ -93,7 +93,7 @@
 
     @if ($totalCalls > 0)
         <div style="margin-bottom:12px;padding:10px 14px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;font-size:12px;color:#1e3a8a;">
-            <strong>Tokens consumate luna aceasta:</strong>
+            <strong>{{ __('Tokens consumate luna aceasta:') }}</strong>
             {{ number_format($totalTokens) }} tokens · {{ $totalCalls }} cereri
             @foreach ($usage as $provider => $u)
                 · {{ strtoupper($provider) }}: {{ number_format($u['tokens_in'] + $u['tokens_out']) }}
@@ -125,10 +125,10 @@
                 @if (! $chat || $chat->messages->isEmpty())
                     <div class="ai-empty">
                         <div style="font-size:32px;margin-bottom:8px;">✨</div>
-                        <div style="font-size:14px;font-weight:600;margin-bottom:4px;">Asistent AI pentru autoservice</div>
+                        <div style="font-size:14px;font-weight:600;margin-bottom:4px;">{{ __('Asistent AI pentru autoservice') }}</div>
                         <div style="font-size:12px;">{{ __('Întreabă-mă orice — diagnostic, sumar, sugestii, redactare mesaje către clienți...') }}</div>
                         <div style="font-size:11px;margin-top:16px;color:#9ca3af;">
-                            <b>Configurare:</b> {{ __('mergi la Setări → Asistent AI și adaugă cheia API (Claude / GPT / Gemini).') }}
+                            <b>{{ __('Configurare:') }}</b> {{ __('mergi la Setări → Asistent AI și adaugă cheia API (Claude / GPT / Gemini).') }}
                         </div>
                     </div>
                 @else