Can AI replace Sunsama?

Build me a solo daily planner like Sunsama. Requirements:

- A local web app on localhost:4400: Node + Express + better-sqlite3, server-rendered
  with a little vanilla JS for drag and drop. No frontend framework.
- Today view, two columns: my Google Calendar events (read-only via googleapis, OAuth
  creds in .env) as a timeline, and today's task list beside it.
- Tasks have title, estimate in minutes, project tag, done flag. Quick-add box at the
  top, plus a backlog panel of unplanned tasks I can drag into today.
- Header shows planned minutes vs a daily budget from config (default 6h) and turns
  red when I overplan.
- A /shutdown page for the end of day: walks each unfinished task, one keystroke to
  roll to tomorrow, send to backlog, or drop, then shows planned vs actual.
- Keep per-day history in SQLite so a /week page can show the last 7 days of planned
  vs done.
- Calendar is read-only: never write events. Out of scope: task-tool integrations
  (Todoist, Trello, email), mobile apps, and two-way calendar sync.
- No accounts, no telemetry, everything local except the Google API calls.
- README: Google Cloud console steps for the OAuth client · budget an hour, that
  console is the worst part of this build.