API
Middleware
Bot-only rewrite from /s/:token to the share-meta HTML route.
Middleware
File: middleware.js (repo root Vite app).
Matcher: /s/:token*.
If the user-agent matches a social crawler and the path is exactly /s/:token, rewrite to /api/share-meta?token=.... Humans continue to the SPA shared planner.
public/robots.txt allows /api/og and /api/share-meta for scrapers.