Can I vibecode Drip?

Add a Drip importer to the email system in this folder. Requirements:

- An Import page takes Drip's People CSV export (columns include email, status, created_at, tags, lifetime_value
  and custom fields) and shows a column mapping and a dry-run count before writing.
- Rows with status unsubscribed go straight to the suppression list and are never mailed.
- Tags become tags, custom fields become custom fields, lifetime_value is stored as a number, and
  re-importing the same file changes nothing.
- Report rows skipped for a bad email address, with line numbers.
- Update the README.

Extend the email system in this folder with browse events. Requirements:

- Serve /t/shop.js, a snippet that sends product_viewed (product id, title, URL, image) for a visitor
  identified by an ?e= email parameter or a stored cookie from an earlier checkout.
- Add a browse-abandonment workflow: viewed a product, no checkout within 4 hours, send one email with the product.
- Add a back-in-stock list: a form on a product page, and an event your store calls when stock returns.
- Cap each person at one marketing email a day across all workflows.
- Update the README.

Add signup forms to the email system in this folder. Requirements:

- Serve /t/form.js, an embeddable form (email and optional first name) that posts to /subscribe with a
  honeypot field and a per-IP rate limit.
- Send a confirmation email; the person is subscribed only after they click the signed link, and the
  timestamp and source URL of consent are stored.
- Show a thank-you message in place, with no page reload.
- List unconfirmed signups in the admin with a resend button.
- Update the README.

Add subject-line tests to broadcasts in the email system in this folder. Requirements:

- A broadcast can have two subject lines. Send each to 10% of the segment, chosen at random.
- After a wait (set per broadcast, default 4 hours), send the rest with the subject that had more unique clicks;
  on a tie, use subject A. Say in the admin that opens are unreliable because mail apps preload images.
- Show both variants' sends, clicks and orders on the broadcast page.
- Add a test with a fake clock and a tie.
- Update the README.