Playable clip URL for a block: an admin upload takes precedence over a baked clip.

* Smallest allowed generated duration that can cover `span` seconds (so the block * can be cropped down to exactly `span`); falls back to the longest

* Template renders run in this process (a detached background task), so any * restart/crash/redeploy orphans an in-flight render — it can never resum

* AI-generate a cover thumbnail. Uses the admin's `thumbnailPrompt` when provided * (else falls back to a description built from the block prompts),

Whether an audio clip only uses part of its file (cropped/trimmed).

* Map over `items` running at most `limit` tasks concurrently, preserving input * order in the results. Rejects on the first task error, like `Promis

Snap actual pixel dimensions to the closest supported aspect-ratio string.

Snap a dragged span to the nearest allowed clip duration.

Read the existing manifest (so we can merge into it), or [] if none.

* Resolve the effective swap engine for a block. `swapModel` may be: * - "facefusion" → the local FaceFusion service, * - an OpenRouter image mode

Run tasks with a fixed concurrency cap.

* Run `fn`, retrying up to `attempts` times (total) on any error with a short * linear backoff. Used for video generation, which the provider occasio

A large featured card with a title/caption below it (Higgsfield hero row).