Resi Shopify + notifiche merchant + A6 (finestra/esclusioni) + dashboard recessi

Integrazione Resi Shopify:
- Alla conferma del recesso, crea un Reso nativo (returnCreate) per gli ordini
  evasi -> gestione nella UI Resi nativa. Ordini non evasi: skip (merchant gestisce
  annullo/rimborso). Query via order.fulfillments (returnableFulfillments non
  esiste nella API 2026-04). Campo WithdrawalRequest.shopifyReturnId.

Notifiche al merchant (dietro toggle Settings):
- Email di notifica a ogni recesso (sendMerchantNotification) + tag "Recesso"
  sull'ordine (tagsAdd, scope write_orders). Toggle notifyEnabled/notifyEmail/tagEnabled.

A6 - completezza compliance (dietro toggle, default OFF, non tocca il flusso testato):
- Finestra 14gg: computeDeadline/isWindowExpired (rif = data evasione o ordine +
  defaultWindowDays). Esclusioni Art. 59: checkExclusions su regole ExclusionRule
  (ALL/PRODUCT/TAG). lookupOrder esteso (fulfillments + lineItems product/tags).
  checkCompliance() aggancia lookup+confirm. Toggle enforceWindow/enforceExclusions.
- Pagina admin Esclusioni (CRUD regole) + sezione Regole di recesso in Impostazioni.

Dashboard: pagina Recessi (registro legale read-only). NavMenu: Recessi/Impostazioni/Esclusioni.
Scope: +write_returns,+write_orders. Editor email vincolato (oggetto/intro/nota + anteprima).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mv83a29B4eFv5ixoj6PoE1

app/prisma/migrations/20260707103200_shopify_return_id/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "WithdrawalRequest" ADD COLUMN     "shopifyReturnId" TEXT;

app/prisma/migrations/20260707110011_merchant_notify_tag/migration.sql

@@ -0,0 +1,4 @@
+-- AlterTable
+ALTER TABLE "Settings" ADD COLUMN     "notifyEmail" TEXT,
+ADD COLUMN     "notifyEnabled" BOOLEAN NOT NULL DEFAULT true,
+ADD COLUMN     "tagEnabled" BOOLEAN NOT NULL DEFAULT true;

app/prisma/migrations/20260707110800_enforce_toggles/migration.sql

@@ -0,0 +1,3 @@
+-- AlterTable
+ALTER TABLE "Settings" ADD COLUMN     "enforceExclusions" BOOLEAN NOT NULL DEFAULT false,
+ADD COLUMN     "enforceWindow" BOOLEAN NOT NULL DEFAULT false;

app/prisma/schema.prisma

@@ -52,6 +52,11 @@ model Settings {
   emailSubject       String?
   emailIntro         String?
   emailNote          String?
+  notifyEnabled      Boolean  @default(true)
+  notifyEmail        String?
+  tagEnabled         Boolean  @default(true)
+  enforceWindow      Boolean  @default(false)
+  enforceExclusions  Boolean  @default(false)
   createdAt          DateTime @default(now())
   updatedAt          DateTime @updatedAt
 
@@ -87,6 +92,7 @@ model WithdrawalRequest {
   status          WithdrawalStatus  @default(RECEIVED)
   receiptSentAt   DateTime?
   computedDeadline DateTime?
+  shopifyReturnId String? // GID del Reso Shopify creato (se ordine evaso)
   createdAt       DateTime          @default(now())
   updatedAt       DateTime          @updatedAt