Add two-way support messaging and author usage dashboard.

Complete Stripe billing E2E: checkout, onboarding, auto catalog sync.

Add author dashboard email-to-reader with click-to-fill recipient.

Use SMTP port 587 with STARTTLS for Gmail on restricted hosts.

feat: SuperAdmin email settings for Gmail sender and app password (encrypted)

fix: heal chatbot_is_active on valid subscription (403 on session/init); add Contact Us form and SuperAdmin inbox

Add fixed Contact Us tab and support email flow in admin panel.

Add publish-help contact form with support email routing.

Restructure project for HF Spaces deployment