fix: prefer path slug over rkey for leaflet URLs, add "view on atlas" link
leaflet.pub posts with custom slugs (e.g. /run-claude-and-opencode-...)
were 404ing because we always built URLs with rkey. now prefer the path
field when available.
also adds: small scatter-dot icon on each search result that navigates
directly to that document on the atlas (by URI lookup, no API call),
touch-active feedback for mobile, and fixes atlas.js variable ordering
bug that crashed the page when ?q= was present.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>