- build_unwrapped: 2D PCA of the CLAP embeds → per-sample 'vibe map' coords +
  16 seed-vibe chips (PLN's own words — the on-ramp, since users don't know what
  to type). vibe0/vibe1 join the axis picker as a semantic-space lens.
- unwrapped.html: VIBE SEARCH box (free text → /vibe) + clickable seed chips;
  results highlight on the map (dim misses, size hits by similarity, ring the top,
  faint-violet→magenta ramp) and auto-reveal the vibe map; result strip auditions.
  Shift-click any dot → /similar (nearest neighbours in embedding space). Null-safe
  plotting for vibe/raw axes. Graceful banner when the endpoint is absent.