feat(29-delivery-status-mapping-ui): konfiguracja mapowania statusów dostawy per provider

Phase 29 complete (v1.3):
- Tabela delivery_status_mappings z DB overrides
- DeliveryStatus: normalizeWithOverrides(), descriptionWithOverrides(), getDefaultMappings()
- UI ustawień: tabela mapowań per provider (InPost/Apaczka/Allegro), bulk save, reset, resetAll
- 5 endpointów w routes/web.php, link w menu bocznym

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

resources/scss/app.scss

@@ -4,6 +4,7 @@
 @use "modules/printing";
 @use "modules/shipment-presets";
 @use "modules/delivery-status";
+@use "modules/delivery-status-mappings";
 
 * {
   box-sizing: border-box;