Redesign project website

[luoyuctl]

Summary

• redesign the project website around a terminal-native, real-evidence landing page
• use real local agenttrace metrics and real colored TUI screenshots across the homepage
• update Pages deployment and artifact validation so every referenced screenshot ships with the site

Validation

• go test ./...
• /bin/bash scripts/ci/check-pages-artifact.sh site
• /bin/bash scripts/ci/check-release-surfaces.sh
• node --check site/script.js
• /bin/bash -n scripts/ci/check-pages-artifact.sh
• desktop and mobile browser screenshots from a prepared Pages artifact at http://localhost:4174/
• secret scan across text diffs and tracked files