v0.3.1 — auto-updating stats

All repo/star counts now inject at build time from live GitHub API. Daily cron + every deploy keeps them current.

• Hero: Repositories + Stars (was runtime API, now baked in)
• About: "N+ public repositories"
• Philosophy: "N+ repositories and growing"
• Journey: "Grew to N+ open source repos"

No more hardcoded 134. Current: 143 repos, 97 stars.