Airtable

Build me a personal spreadsheet-database to replace Airtable. Requirements: - Local web app: Node + Express + better-sqlite3, one database file at data/base.db; the grid is Tabulator plus vanilla JS, no build step. - Create tables and columns from the UI, typed as text, number, date, select, checkbox, or URL; each is a real SQLite table so other tools can query it. - Inline grid editing, click-to-sort, per-column filters. - Saved views: name + filters + sort + hidden columns, stored in a views table and listed in a sidebar. - Link columns: a cell can reference rows in another table, picked from a dropdown, rendered as chips that click through to the linked row. - A quick-entry form page per table at /form/<table>: one input per column, posts a row. - CSV import and export per table so nothing is ever trapped. - Localhost only, no accounts, no telemetry. - Out of scope: multi-user permissions, automations, and hosted interfaces; when teammates need in, that is what Airtable is for. - README: setup and where the database lives.