Hero crab was rendering at viewport-fill size due to SVG width:auto
behaving as 100% on inline elements without explicit dimensions.
Move it to a small inline glyph (22px) before the footer line so the
crustacean character stays without dominating the page.
- Hero: minimal top-down crab silhouette in amber line-art, joins
the staggered hero rise sequence; subtle hover scale on the group
- Favicon: crab silhouette replaces letter mark
- Footer: 'cleanup crab on the OpenClaw seafloor' replaces
'quiet member of the OpenClaw family'
- Add README pointing to the openclaw/clawsweeper bot source
