Implement complete marketing homepage for Wizamart targeting Letzshop
vendors in Luxembourg. Includes:
- Marketing homepage with hero, pricing tiers, and add-ons
- 4-step signup wizard with Stripe card collection (30-day trial)
- Letzshop vendor lookup for shop claiming
- Platform API endpoints for pricing, vendors, and signup
- Stripe SetupIntent integration for trial with card upfront
- Database fields for Letzshop vendor identity tracking
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>