Bump secrets-mcp to 0.2.2 and sync Cargo.lock.
Add home.html landing with SEO and footer link to the refining/secrets
repository; serve it at / and expose /login for sign-in.
Update OAuth error redirects and dashboard unauthenticated redirects to
/login. Improve login page meta tags, back-home link, and OAuth error
alert. Refresh llms.txt and robots.txt.
Made-with: Cursor
