Store company_guid after OAuth via profile API; drop company select and
companies endpoint. Coupons AJAX uses stored company only. Form request
no longer accepts company fields from the browser.
Made-with: Cursor
Implement Weeztix integration per documentation: database config and
subscriber coupon_code, OAuth redirect/callback, admin setup UI with
company/coupon selection via AJAX, synchronous coupon creation on public
subscribe with duplicate and rate-limit handling, Mailwizz field mapping
for coupon codes, subscriber table and CSV export, and connection hint
on the pages list.
Made-with: Cursor
