fix: kidlisp.com routes on lith — dedicated handler instead of @mainspa
kidlisp.com was lumped into the AC SPA handler which couldn't resolve
its index.html. Now gets its own block with proper SPA fallback, plus
missing /wallet and /decree routes for subdomains.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>