Make the summary pages discoverable so traffic compounds passively:
- /today: a server-rendered, shareable + indexable digest of today's brief —
each item's title (→ /a summary), our summary, and a source link. OG/Twitter
meta + self-canonical.
- /sitemap.xml: dynamic — home, /today, and every accepted non-duplicate /a page
with lastmod. robots.txt allows all and points to it.
- Home (SPA shell) gains canonical + OG/Twitter tags for cleaner unfurls.
- Caddy routes /today + /sitemap.xml to the API. 133 tests pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
