Presenter Video Enhancement Engine

API-driven overlay & callout builder — MVP. All endpoints require Authorization: Bearer <API key> or X-API-Key.

`POST /api/projects`	Create a project (name, prompt, theme)
`POST /api/projects/{id}/video`	Upload the source MP4 (multipart 'file' or raw body)
`POST /api/projects/{id}/transcript`	Upload a VTT / SRT / JSON transcript
`POST /api/projects/{id}/metadata`	Extract video metadata with FFprobe
`POST /api/projects/{id}/edit-plan/generate`	AI-generate a validated edit plan
`PUT /api/projects/{id}/edit-plan`	…or submit an edit plan manually
`POST /api/projects/{id}/edit-plan/validate`	Re-validate the stored plan (or dry-run one)
`POST /api/projects/{id}/render`	Queue the render job
`GET /api/projects/{id}/render/status`	Poll render progress
`GET /api/projects/{id}/download`	Download the enhanced MP4

Health check: GET /api/health. See the project README for full usage, or drive the workflow with the video-enhancer Claude Code plugin.