Faza 3.4: Finanțe — Plăți + Cheltuieli + Cashflow

Schema:
- payments: client_id, work_order_id, user_id (operator), paid_at, amount,
  method (cash/card/transfer/mobile), reference, notes
- expenses: supplier_id, purchase_id, paid_at, category (salary/purchase/rent/
  utilities/advance/tax/fuel/tools/marketing/other), name, amount, method, ref

Logică auto:
- Payment::saved/deleted recalculează automat work_order.pay_status
  (unpaid → partial → paid) based on suma totală vs work_order.total
- WO model are noi metode: payments(), paidAmount(), balanceDue()

Filament resources (group Finanțe):
- PaymentResource: form cu legare opțională la WO + client; tabel cu
  Sum summary, filtre azi/luna_curentă/method
- ExpenseResource: 10 categorii preset, badge categ, total summary,
  filtru luna curentă
- PaymentsRelationManager pe WO: "Plăți" tab cu auto-fill client_id +
  user_id la creare

Widget FinanceOverview:
- Încasări (luna), Cheltuieli (luna), Profit (luna), Datorii clienți
- color coded: profit verde sau roșu, datorii galben/verde

Settings page fix (Filament v5):
- mount() folosește acum $this->form->fill([...]) în loc de $this->data direct
- Filament v5 cere fill explicit pentru a inițializa state-ul schemei

Seed:
- 1 plată parțială pe fișa BMW (200 din 750)
- 6 cheltuieli demo: 3 salarii, chirie, electricitate, achiziție piese

Total Filament tenant routes: 69.

app/Filament/Tenant/Pages/Settings.php

@@ -6,6 +6,7 @@ use App\Tenancy\TenantManager;
 use Filament\Forms;
 use Filament\Notifications\Notification;
 use Filament\Pages\Page;
+use Filament\Schemas;
 use Filament\Schemas\Schema;
 
 class Settings extends Page
@@ -27,9 +28,13 @@ class Settings extends Page
     public function mount(): void
     {
         $company = app(TenantManager::class)->current();
+        if (! $company) {
+            return;
+        }
         $settings = (array) ($company->settings ?? []);
 
-        $this->data = [
+        // Filament v5: fill via $this->form->fill() (initializes the schema state).
+        $this->form->fill([
             'display_name' => $company->display_name ?? $company->name,
             'city' => $company->city,
             'phone' => $company->phone,
@@ -40,7 +45,7 @@ class Settings extends Page
             'labor_rate' => $settings['labor_rate'] ?? 400,
             'services' => isset($settings['services']) ? implode(', ', (array) $settings['services']) : '',
             'cars' => isset($settings['cars']) ? implode(', ', (array) $settings['cars']) : '',
-        ];
+        ]);
     }
 
     public function form(Schema $schema): Schema
@@ -88,6 +93,10 @@ class Settings extends Page
     {
         $data = $this->form->getState();
         $company = app(TenantManager::class)->current();
+        if (! $company) {
+            Notification::make()->title('Tenant not resolved')->danger()->send();
+            return;
+        }
 
         $company->update([
             'display_name' => $data['display_name'] ?? null,