ProofHub?

Build a focused replacement for ProofHub for one person managing tasks across a few projects, based on this public product description: “ProofHub: Project Management & Team Collaboration Software — ProofHub is an easy-to-use project management software with everything you need to manage teams, work, and projects from a central location. No per-user fee. Free trial.” Do not copy the original brand, proprietary assets, name, logo, UI, or copy; create an original visual system.

Core workflow
- Recreate only the narrow primary workflow described above, with create, edit, prioritize, schedule, complete, and filter tasks; support projects, labels, recurring rules, and a clear overdue state; provide keyboard-friendly editing, reminders as an optional adapter, and export; include local demo data and persistence tests.
- Keep the product name and source description in a research note in the README, and turn every uncertain behavior into an explicit assumption or user setting rather than inventing a feature.
- Use a small React/TypeScript app with a portable JSON or SQLite data model, clear loading/empty/error states, and adapters around external services. Seed realistic demo data so the complete workflow works without paid credentials.

Scope boundaries
- Out of scope for v1: team chat; enterprise resource planning; dozens of third-party integrations. Do not promise feature parity, proprietary data, or enterprise reliability.

Include a README with setup, environment variables, data model, implementation decisions, privacy behavior, testing instructions, and important limitations.