Faza 2: multi-tenancy + Filament dual panels + seed PSauto

Schema centrală:
- companies (slug unique, status, plan_id, settings JSON, trial/active dates)
- super_admins (operator platform)
- plans (free/basic/pro)

Schema tenant (toate cu company_id NOT NULL):
- users (UNIQUE company_id+email)
- clients
- vehicles

Tenancy core:
- App\Tenancy\TenantManager singleton
- App\Models\Concerns\BelongsToTenant trait + TenantScope
- ResolveTenant middleware (slug → Company, 404 pentru rezervate/missing)
- CheckTenantStatus middleware (suspended/expired/archived)
- Fail-safe: TenantScope returns 0 rows când tenant nu e rezolvat

Auth guards:
- 'central' guard cu super_admins provider (panou platform)
- 'web' guard cu users provider (per-tenant)

Filament panels:
- CentralPanelProvider la service.mir.md/admin
- TenantPanelProvider la <slug>.service.mir.md/app
- CompanyResource (central): CRUD companii cu status badge + filtre
- ClientResource (tenant): CRUD clienți cu status, sursă, sold
- VehicleResource (tenant): CRUD mașini cu marcă/model/VIN

Seed:
- 3 plans (free/basic/pro)
- super-admin: vasyka.moraru@gmail.com / admin123
- demo company 'psauto' cu admin user admin@psauto.md / admin123
- 3 clienți + 3 mașini preluate din AutoCRM.html

Bootstrap:
- TrustProxies (Cloudflare→Traefik HTTPS detection)
- forceScheme/forceRootUrl când APP_URL e HTTPS
- Helper global tenant() în app/helpers.php (autoload via composer)
- RUN_SEED env var în entrypoint pentru db:seed condiționat

app/Models/Scopes/TenantScope.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Models\Scopes;
+
+use App\Tenancy\TenantManager;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Scope;
+
+/**
+ * Auto-filter every query by the current tenant's company_id.
+ * No-op when no tenant is resolved (central panel context).
+ */
+class TenantScope implements Scope
+{
+    public function apply(Builder $builder, Model $model): void
+    {
+        $tenant = app(TenantManager::class);
+
+        if (! $tenant->isResolved()) {
+            // Fail-safe: no tenant set → return zero rows (prevents accidental
+            // cross-tenant leak). Use withoutGlobalScopes() in central panel
+            // to query across all tenants intentionally.
+            $builder->whereRaw('0 = 1');
+            return;
+        }
+
+        $builder->where(
+            $model->getTable() . '.company_id',
+            $tenant->currentId()
+        );
+    }
+}