Function render_library_index 

pub fn render_library_index(
    manifest: &Manifest,
    store: &LineageStore,
    live: &HashMap<&str, &Clip>,
) -> String

Render the whole-library index as a stable, pretty-printed JSON document.

One row per manifest entry, in clip-id order (the manifest is a BTreeMap, so the order is deterministic), and only clips whose file exists on disk are listed, so the index never advertises a missing file. Durable fields come from the manifest and the archived LineageStore; live-only fields (artist, handle, duration, tags) come from live when the clip was seen this run and are null otherwise. The album is the raw logical album title, which legitimately differs from the sanitised, truncated album segment inside path. The renderer takes no clock, so the output is fully deterministic.