- Add /video/generate endpoint to crawl4ai Python service
- Add VideoGenerateRequest and VideoGenerateResponse models
- Add generateVideo method to MetaCrawlClient TypeScript client
- Add /api/meta/video Next.js API route
- Add 'Video' button in PromptHero UI (visible only for Meta AI provider)
- Blue/cyan gradient styling for Video button to differentiate from Generate
- Enable multi-file selection for Subject, Scene, Style inputs
- Show stacked thumbnails with count badge
- Add reference preview panel with individual delete buttons
- Add '+' button to add more refs per category
