Stage 8 — Smart Pricing Engine: contextual coefficients

Contextual multipliers layered on top of base MarkupRule pricing, applied
per work-order line based on vehicle, client and urgency.

Schema:
- pricing_coefficients (multiplier, conditions JSON, priority, stackable)
- vehicles.vehicle_class (sedan/suv/commercial/hybrid/ev/premium)
- clients.is_vip
- work_orders.urgency (normal/urgent/express)

PricingEngine::quote(Part, Vehicle?, Client?, urgency):
- base = MarkupRule on buy_price (fallback sell_price or buy×1.30)
- context: class (explicit or inferred hybrid/ev from fuel), age, vip, urgency
- stackable coefficients all multiply; non-stackable take only the highest
- returns {base, final, applied[]} breakdown

PricingCoefficient::matches(ctx) — classes/age range/vip/urgency conditions
(empty = always applies).

Filament:
- PricingCoefficientResource with condition builder (classes, age, vip, urgency)
- vehicle_class select, client is_vip toggle, WO urgency select
- "Preț inteligent" action on WO parts shows breakdown + applies sell_price

Tests (6 new):
- base-only without coefficients; age coefficient gating; VIP; express urgency;
  stackable multiply vs non-stackable highest-wins; hybrid inferred from fuel

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Resources/VehicleResource.php

@@ -72,6 +72,10 @@ class VehicleResource extends Resource
                             'Benzină' => 'Benzină', 'Diesel' => 'Diesel', 'Hybrid' => 'Hybrid',
                             'EV' => 'Electric', 'GPL' => 'GPL', 'GNC' => 'GNC',
                         ]),
+                    Forms\Components\Select::make('vehicle_class')
+                        ->label('Clasă (pentru pricing)')
+                        ->options(\App\Models\Tenant\PricingCoefficient::VEHICLE_CLASSES)
+                        ->helperText('Folosită de coeficienții de preț. Hibrid/EV se deduc și din combustibil.'),
                     Forms\Components\TextInput::make('mileage')->label('Kilometraj')->numeric()->default(0),
                     Forms\Components\TextInput::make('color')->maxLength(40),
                 ]),