Add one-page release summary for Joe (Aug 18 deployment)
Typst one-pager comparing the Aug 18 release (51f1c86) with the
previous deployment (241483f, Aug 16), for sharing with Joe: hero
artwork in the site's visual language, headline stats (164 of 379
recordings, 24 of 24 principles, 21 aphorisms), what changed, a
coverage bar, and the road ahead — batch-by-batch expansion to full
coverage of the archive plus near-immediate coverage of new uploads.
