feat: Migrate frontend from static HTML to Next.js 16 App Router

feat: Migrate frontend from static HTML to Next.js 16 App Router

feat: Migrate frontend from static HTML to Next.js 16 App Router

fix: Universal cyan/white theme + smaller fonts + ₦ currency + navbar everywhere

feat: On-demand payment verifier on HF Space + 3-role bot welcome

feat: PalmPay payment option in checkout + delivery info flow

fix: remove duplicate searchGmailForPayment function (syntax error)

feat: AI-powered payment verification (Qwen2.5-72B) + bank name collection

feat: Payment gateway — PalmPay manual transfer + Gmail IMAP verification

Production fixes: Depop-style sellers, AI Mode, products loading, cart count, account page

Production refactoring: move buying folder to root, separate seller login, new navbar

fix: product page 404 — FK constraint + column name fix

fix(phase4): edge functions now broadcast via Render bot /internal/broadcast

Phase 4 — Cross-platform integration

fix(phase3): video upload via /api/video-upload proxy (presigned URL endpoint had bucket bug)

Phase 3 — Content & Discovery

Phase 2 — Community Engagement

chore: ignore supabase CLI linked-project artifacts

Phase 1 — Social ecommerce: seller dashboard migrated to Edge Functions + follow/feed/discover

feat: HTTP-only cookie auth (production standard — same as AliExpress, Amazon, Gmail)

feat: session-based auth stored in Supabase (NO cookies, NO localStorage)

feat: cookie-based auth + 4 new edge functions + remove localStorage