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

database/migrations/2026_05_05_000020_create_clients_table.php

@@ -0,0 +1,49 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('clients', function (Blueprint $t) {
+            $t->id();
+            $t->foreignId('company_id')->constrained()->cascadeOnDelete();
+
+            $t->string('type')->default('individual'); // individual / company
+            $t->string('name');
+            $t->string('company_name')->nullable();    // for type=company
+
+            $t->string('phone');
+            $t->string('phone_alt')->nullable();
+            $t->string('email')->nullable();
+            $t->string('telegram')->nullable();
+            $t->string('whatsapp')->nullable();
+            $t->string('viber')->nullable();
+
+            $t->string('source')->nullable();          // call / site / telegram / google / ...
+            $t->string('marketing_channel')->nullable();
+            $t->string('status')->default('active');   // new / active / vip / debtor / blocked / lost
+
+            $t->decimal('balance', 12, 2)->default(0); // negative = customer owes us
+            $t->decimal('discount_pct', 5, 2)->default(0);
+            $t->text('notes')->nullable();
+
+            $t->foreignId('assigned_to')->nullable()->constrained('users')->nullOnDelete();
+            $t->timestamp('last_contact_at')->nullable();
+            $t->timestamps();
+            $t->softDeletes();
+
+            $t->index(['company_id', 'status']);
+            $t->index(['company_id', 'phone']);
+            $t->index(['company_id', 'created_at']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('clients');
+    }
+};