name	add-callbook
description	Attach a callbook (prefer text; image allowed) to a song version

Add Callbook

Prefer text (format: table|flow under content/callbooks/). Images are allowed but not recommended.

Find the song in content/songs.json
Under the right versions[], push a callbook:
- Image: { "format": "image", "description": "来源--作者", "src": "assets/call-images/author/stage/song.png" }
- Put the file under content/assets/call-images/...
npm run validate
PR

Text formats are rendered in a later phase; until then text refs show a placeholder.

add-callbook