- Add database schema for site_settings and generated_songs tables with migration 011_generation.sql
- Implement backend services for settings management and generation workflow (submit/poll ComfyUI)
- Create routes for admin panel (/admin) to configure generation parameters, upload workflow JSON, manage users
- Create generate routes (/generate) with rate limiting (3min cooldown, 10/hour limit), form submission, polling, streaming
- Add frontend UI: generate page with form and rate-limit panel, publish flow for completed generations
- Integrate generation link into header navigation for verified users when enabled
