lith Caddy: explicit /platter -> /platter/ redirect
Sidesteps a try_files quirk where the no-slash top-level /platter URL
was serving the papers root /index.html (Apr 26 last-modified) instead
of rewriting to /platter/index.html. The deeper /platter/jeffrey works
correctly with the same try_files rule, so this is something specific
to top-level dir + no-slash. Explicit redir is unambiguous and
documents intent.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>