Coda

Build me a docs-with-tables workspace to replace Coda, single-user. Requirements: - Local web app: Node + Express + better-sqlite3, server-rendered pages with vanilla JS, no build step. - Docs are Markdown edited in a textarea with live preview (marked); a fenced block naming a table, like table:Expenses, renders that table live inside the doc. - Tables have typed columns (text/number/date/select/checkbox), inline row editing, and are real SQLite tables I can query with other tools. - Formula columns: a JS expression over the row's other fields (price * qty) evaluated server-side with new Function over plain values only, recomputed on edit. No imports, no network access in formulas. - Buttons in docs: a doc can declare a button that runs one whitelisted server action (add row with defaults, mark done); docs never execute arbitrary code. - Named views per table: filter + sort saved and embeddable in any doc. - CSV export per table, Markdown export per doc; localhost only, no accounts, no telemetry. - Out of scope: collaboration, permissions, and packs/integrations. Coda's formula language and pack ecosystem are the product; this is my personal version. - README: setup and where the data lives on disk.