The frontend will be built in the next session. For now, you can test the API endpoints directly:
GET /api/health — health checkPOST /api/upload — upload an imagePOST /api/process/{job_id} — generate 4 variantsGET /api/preview/{job_id}/{variant}/{filename} — view variant imagesPOST /api/select/{job_id} — record variant selectionPOST /api/edit-palette/{job_id} — merge palette coloursGET /api/pdf/{job_id}?variant_id=N — download PDFCheck /api/health to confirm the backend is responding.