Copy LeadFinder.io?

Build me a Sales web app like LeadFinder.io.

LeadFinder.io does: LeadFinder.io is an all-in-one lead generation suite offering truly unlimited leads at an affordable price. It provides tools for finding business leads, extracting data from maps and websites, and va It reportedly makes about $2k/mo, so the core idea clearly has demand — I want a lean version I can run and charge for.

Start from the open-source project open-mercato/open-mercato (https://github.com/open-mercato/open-mercato) — reuse what fits, strip its branding, and build the specifics below on top of it.

Requirements:
- Contacts, companies, and a drag-and-drop deal pipeline.
- Activity log, notes, tasks, and reminders per contact.
- AI: draft outreach and summarize a contact's history.
- Import/export CSV and simple reporting.

Also:
- Clean, modern, responsive UI with a thoughtful landing page.
- Email/password auth and a simple paid tier (Stripe test mode) so it's ready to charge.
- A README covering setup, environment variables, and how to deploy.

Ship a working MVP I can run locally first, then help me deploy it.