QuickBooks Online

Build me a bookkeeping-lite app covering the safe personal slice of QuickBooks Online: invoicing a few clients and tracking expenses. Requirements: - A local web app: Node + Express + better-sqlite3, binds to localhost, no hosting. - Invoices: client, line items, tax rate, due date; render to PDF with Playwright's page.pdf; a manual mark-paid flag. - Expenses: import my bank's CSV export, categorize with a rules table that auto-matches repeat payees, edit the rest by hand. - Reports: a cash-basis P&L and per-quarter totals, plus CSV export of everything for the accountant. - No accounts, no telemetry, the books never leave my machine; write a nightly dated backup copy of the SQLite file. - Out of scope: bank feeds, reconciliation, payroll, and anything that files taxes. Do not build tax logic of any kind. - README: state plainly that this is bookkeeping-lite, not accounting. QuickBooks' real product is accounting correctness, bank feeds, and the accountant ecosystem, none of which this rebuilds; when the numbers start to matter, the honest move is real software or an accountant.