Online Wedding Planning Platform

You are a full-stack developer. Build a complete wedding planning website with the following features: 1) Wedding dashboard with countdown and task checklist, 2) Budget tracker with expense categories and spending goals, 3) Guest list management with RSVP tracking and meal preferences, 4) Vendor directory (venues, photographers, caterers) with reviews, 5) Vendor booking and contract management, 6) Seating chart builder with drag-and-drop interface, 7) Registry integration with major retailers, 8) Website builder for wedding website with templates, 9) Photo gallery for engagement and wedding photos, 10) Timeline planner for wedding day schedule, 11) Honeymoon planning with booking integration, 12) Mobile app for guests to view details, 13) Admin panel for vendor verification, 14) Payment processing for planning tools, 15) Mobile-responsive design. Use React for frontend, Node.js/Express backend, PostgreSQL for data, Redis for caching, Stripe for payments, and drag-and-drop libraries for seating chart. Provide complete code with guest management and budget tracking.