SavvyCal

Build me a solo booking page to replace SavvyCal: one person, one calendar, a few link types. Requirements: - Node + Express + better-sqlite3 on my VPS behind HTTPS; server-rendered pages, Luxon for timezone math. - Link types in links.json: slug, title, duration, buffer, allowed hours (e.g. /intro, 30-min slots, 15-min buffer, weekdays 10:00-16:00 my time). - Availability from Google Calendar free/busy (googleapis, OAuth creds in .env); show open slots for the next 14 days in the visitor's detected timezone with a timezone switcher. - Booking form: name + email + note. On submit, create the event on my calendar with the guest as attendee so Google sends the invite, and store the booking in SQLite. - Re-check free/busy at submit time, not just render time, so two guests cannot grab the same slot. - Confirmation email to guest and me via Resend or SMTP (creds in .env), including a cancel link that deletes the event. - No accounts, no telemetry beyond my own server logs. - Out of scope: team links, routing, payments, and reminder sequences. One calendar, mine. - README: the Google Cloud console OAuth steps (budget an hour, it is the worst part) and the DNS/HTTPS notes.