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Build a full-stack e-commerce pop-up display and abandoned cart notification app in TypeScript using Next.js App Router, Tailwind CSS, Prisma, and PostgreSQL.

CORE DATA MODELS:
1. Account: id, shopifyDomain, accessToken, email, planTier ('popups', 'email', 'growth').
2. Contact: id, accountId, email, phone, isEmailSubscribed, isSmsSubscribed, cartToken, lastSeenAt, metadata (JSONB).
3. Campaign: id, accountId, type ('popup', 'banner', 'spin_wheel', 'flyout'), settings (JSONB holding styling, triggerRules, discountCode), isActive, analytics (views, conversions).
4. AutomationFlow: id, accountId, triggerType ('cart_abandoned', 'welcome_series'), steps (JSONB array of delay, send_email, send_sms actions), isActive.
5. MessageLog: id, accountId, contactId, channel ('email', 'sms'), status ('queued', 'sent', 'failed'), sentAt.

CLIENT WIDGET (script.js):
- Build a lightweight standalone vanilla JavaScript bundle outputted to public/widget.js.
- It must read attributes from script tag: data-shop-domain.
- Evaluate display conditions in-browser: pageviews, scroll percentage (>50%), exit-intent (mouse leaves top viewport boundary), and cart value (fetched via window.Shopify.cart or /cart.js).
- Render accessible popups dynamically using Shadow DOM to isolate styles. Handle form submissions (email/phone input) via POST to /api/v1/capture.
- Set a cookie/localStorage flag upon form submission or explicit close to prevent re-triggering for N days.

BACKEND INTEGRATIONS & ROUTING:
1. Shopify App Bridge Authentication: Support OAuth 2.0 flow for Shopify, handling merchant session tokens and storing offline access tokens.
2. Capture API (/api/v1/capture): Accept form payloads, create/update Contact records, and verify TCPA consent checkboxes before marking isSmsSubscribed=true.
3. Shopify Webhook Handlers (/api/webhooks/shopify):
   - carts/update or checkouts/create: Upsert contact metadata with cart contents, cart token, and total price.
   - checkouts/update: If checkout completed, clear cartToken and mark existing pending abandonment jobs as cancelled.
4. Automation Queue Worker (In-Memory or Redis BullMQ structure mock):
   - When a cart update webhook arrives, schedule an abandoned cart check delayed by 30 minutes.
   - If cart is still uncompleted after 30 mins, trigger the AutomationFlow steps sequentially.
   - Send Email via Resend API / AWS SES client wrapper.
   - Send SMS via Twilio API client wrapper (validating E.164 phone formats).

ADMIN DASHBOARD:
- Visual Display Builder: Form controls to edit headline, secondary text, button color, and background image previewing the rendered popup in real time.
- Target Rule Selector: Dropdowns to toggle exit intent, time on page delay (seconds), minimum cart value threshold, and device filtering (desktop vs mobile).
- Contacts Table: Data grid showing subscriber email, phone, opt-in timestamp, and source campaign.

OUT OF SCOPE:
- Full drag-and-drop WYSIWYG email template builder (use simple rich text + CTA button editor).
- Native A2P 10DLC brand registration UI (assume pre-registered Twilio credentials).
- Multi-language translation UI.

Ensure full error handling for missing webhooks, expired Shopify tokens, and invalid email payload formats.

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