Enhanced landing page with gradient hero, 5-card features grid, auth-aware
"Your Flows" section, and 3-step "How TBFF Works" walkthrough. Added
EncryptID token verification on flow creation, space_flows DB table for
per-space flow association, and space-scoped flow listing API.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett