Notion

Build me a personal notes-and-databases app to replace Notion. Requirements: - A local web app: Node + Express + better-sqlite3, server-rendered pages with a little vanilla JS. No frontend framework, no build step. - Pages are Markdown, stored in SQLite, edited in a plain textarea with a live preview pane (render with marked). Markdown is the format, not blocks. - [[Wiki-style]] links between pages, with a backlinks section rendered at the bottom of every page. - Simple databases: a page can define a table (columns typed text/number/date/select), rows editable inline, stored as JSON in SQLite. - Full-text search across everything via SQLite FTS5, search box in the header. - A nightly export of all pages to a folder of plain .md files, so my notes are never trapped in the app. - Binds to localhost only. No accounts, no telemetry, everything on my machine. - Out of scope: real-time collaboration, cross-device sync, and a block editor. Do not build auth or hosting config, this runs on my own machine. - Include a README with setup steps and where the data lives on disk.