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Build a full-stack e-commerce Reviews and Loyalty platform for Shopify using Next.js 14, Tailwind CSS, Prisma, and PostgreSQL.

DATA MODEL:
1. Store: id, shopifyDomain, accessToken, reviewEmailDelayDays (default 14), loyaltyPointsPerDollar (default 1).
2. Product: id, storeId, shopifyProductId, title, handle.
3. Review: id, storeId, productId, customerName, customerEmail, rating (1-5), title, body, status (pending, approved, rejected), verifiedBuyer (boolean), reviewerLocation, createdAt.
4. ReviewMedia: id, reviewId, url, type (image/video).
5. LoyaltyAccount: id, storeId, customerShopifyId, email, pointsBalance, tier (Member, Silver, Gold).
6. PointTransaction: id, loyaltyAccountId, points, reason (purchase, review, referral, redemption), orderId.

CORE API & WEBHOOKS:
1. POST /api/webhooks/shopify/orders-fulfilled: Triggered when an order is fulfilled. Queue a post-purchase review email request scheduled for N days in the future (using BullMQ or Upstash QStash).
2. POST /api/webhooks/shopify/orders-paid: Calculate earned points (order total * loyaltyPointsPerDollar) and increment LoyaltyAccount.pointsBalance. Log PointTransaction.
3. POST /api/reviews/submit: Public API endpoint to collect customer reviews. Accepts star rating, title, body, author name, email, order ID verification, and pre-signed S3 image upload URLs. Validate rating is 1-5.
4. GET /api/reviews/widget: Returns JSON list of approved reviews for a given shopifyProductId, including calculated aggregate score and total review count, optimized for client-side widget rendering.
5. POST /api/loyalty/redeem: Given a customer ID and desired reward points, verify balance, deduct points, and call Shopify REST API (`/admin/api/2024-01/price_rules.json`) to programmatically generate a unique single-use discount code. Return code string to customer.

FRONTEND WIDGETS (Embeddable Vanilla JS / React Component):
- Product Review Widget: Render summary (stars + rating average), review list, filter by stars, and modal form for new submission. Include JSON-LD Schema snippet (`schema.org/Product` aggregateRating) injected into DOM for SEO rich snippets.
- Loyalty Widget: Floating bar or embed showing customer points balance, point rules, and one-click coupon redemption buttons.

FAILURES & BOUNDARIES:
- Out of scope: SMS flows, advanced AI sentiment analysis, complex custom lifecycle email workflows.
- Security: Secure webhook endpoints with HMAC verification using the Shopify Secret. Prevent fraud by validating order IDs against store records before marking `verifiedBuyer = true`.
- Rate limiting: Apply Strict IP rate limits on public submission APIs to block spam. Use a basic profanity dictionary array filter on review submissions to auto-flag suspicious content as `pending`.

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