hallucinogen/gogo-invoice — reverse-engineered prompt

Build me a simple invoice app that works entirely in the browser and keeps everything on the user’s device. I do not want sign up, a backend, or any tracking. When it opens, it should already look like a real invoice that I can click into and edit directly on the page, including company info, logo, client details, dates, line items, tax, shipping, discounts, notes, terms, and payment status. What I see on screen should match the PDF export.

I also want support for multiple sender companies, each with its own defaults like currency and invoice numbering. Save every invoice locally in a history view where I can search, filter by company, reopen old invoices, and duplicate them to make new ones quickly. Add a few starter line item templates for common freelance or service work, a country picker, backup and restore with one JSON file, light and dark mode, and make it installable and usable offline after the first load.

If you need anything, look up current docs online.