Adds public/llms.txt (llms.txt spec: H1 + summary + linked sections)
describing the product for AI agents/crawlers -- usage-focused only, no
internal vendor/infra details.
Also fixes proxy.ts's middleware matcher, which excludes common static
file extensions from Clerk's auth gate but was missing .txt -- every
request to /llms.txt (and any future .txt file, e.g. robots.txt) was
being redirected to the Clerk sign-in page instead of served. No app
route under src/app uses a .txt path, so this only affects genuinely
static files in public/.
SpeedUp-Plan (Gitea #28) -- last remaining Lighthouse finding.
admin
167b9e1a80