codeweb v0.7.1

Fixed

• README screenshots crop to content. The regenerated shots were uniform full-page
  frames — squeezed into README boxes, the matrix rendered ~170px wide and the blast
  shot's inspector was unreadable. scripts/screenshot.mjs now crops each frame to what
  it shows: the graph to its drawn bounding box, the blast shot to the LIT selection
  (tracked from the draw pass) + inspector at a tighter zoom, the matrix to its table +
  legend. README display sizes and the stale corpus line ("274 symbols across 8
  domains" → the real 334/11) synced; shots remain one-command regenerable.