Faza 3.1: CRM core — Leads, Deals, Appointments, Settings, Widgets, Users

Spatie Permission cu teams (team_foreign_key=company_id, teams=true):
- migrations create_permission_tables (model_has_roles cu company_id scope)
- HasRoles trait pe User
- ResolveTenant middleware setează permissions team_id la tenant.id
- Seed: 7 roluri default per tenant (admin/manager/receptionist/mechanic/parts_manager/accountant/marketer)

Module noi:
- Leads (cereri): name, phone, car/model, source, UTM, status, budget, assigned_to,
  acțiune "Convertește" → creează automat Client + Deal
- Deals (pipeline): client/vehicle, stage (8 stage-uri), price, source, lost_reason
- Posts + Appointments: post_id (boxă), master_id, date+time_start+time_end, status, color
- UserResource (tenant): CRUD users cu role/status/locale; canViewAny doar pentru admin

Custom Filament page "Setări" (tenant):
- Brand & contact (display_name, city, phone, email)
- Localizare (limba RO/RU/EN, currency, theme color picker)
- Servicii & tarif (labor_rate)
- Liste configurabile (services, cars) — păstrate în companies.settings JSON

Widgets dashboard:
- Tenant: StatsOverview (Clienți, Mașini, Cereri noi, Deal-uri active, Programări azi)
- Central: PlatformStats (Companii total/active/trial, Expiră în 7 zile)

Seed extins demo PSauto:
- 3 posturi (Pod 1/2/3 cu culori)
- 2 lead-uri demo (Alex Grosu Telegram, Irina Cojocaru WhatsApp)
- 3 deal-uri demo (BMW done, Audi in_work, Porsche agree)
- 2 programări (azi + mâine)

Filament v5 fixes:
- $navigationGroup type → string|UnitEnum|null (parent stricter signature)
- Toate resources noi au tipurile corecte

app/Filament/Tenant/Widgets/StatsOverview.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Filament\Tenant\Widgets;
+
+use App\Models\Tenant\Appointment;
+use App\Models\Tenant\Client;
+use App\Models\Tenant\Deal;
+use App\Models\Tenant\Lead;
+use App\Models\Tenant\Vehicle;
+use Filament\Widgets\StatsOverviewWidget as BaseWidget;
+use Filament\Widgets\StatsOverviewWidget\Stat;
+
+class StatsOverview extends BaseWidget
+{
+    protected static ?int $sort = 1;
+
+    protected function getStats(): array
+    {
+        $newLeads = Lead::where('status', 'new')->count();
+        $openDeals = Deal::whereNotIn('stage', ['done', 'lost'])->count();
+        $todayAppointments = Appointment::whereDate('date', today())->count();
+
+        return [
+            Stat::make('Clienți', Client::count())
+                ->description('Total în baza de date')
+                ->icon('heroicon-o-users')
+                ->color('primary'),
+
+            Stat::make('Mașini', Vehicle::count())
+                ->description('Total înregistrate')
+                ->icon('heroicon-o-truck')
+                ->color('info'),
+
+            Stat::make('Cereri noi', $newLeads)
+                ->description('De procesat')
+                ->icon('heroicon-o-inbox-arrow-down')
+                ->color($newLeads > 0 ? 'warning' : 'success'),
+
+            Stat::make('Deal-uri active', $openDeals)
+                ->description('În pipeline')
+                ->icon('heroicon-o-funnel')
+                ->color('primary'),
+
+            Stat::make('Programări azi', $todayAppointments)
+                ->description(today()->format('d.m.Y'))
+                ->icon('heroicon-o-calendar')
+                ->color('success'),
+        ];
+    }
+}