Write a project README that works as portfolio

Write a project write-up usable as both a GitHub README and a portfolio entry.

Structure:
1. One-line description, plus a slot for the demo and links.
2. Why I built it, two or three lines.
3. Features — **in terms of what a user can do.** Do not break it down screen by screen.
4. Stack **and why each choice** — a stack list with no reasoning does not belong.
5. **One or two problems I got stuck on and how I solved them.**
6. What is not done yet.

Rules:
- **Section 5 is the point of this document.** *If my input does not contain it, ask rather than writing around it.*
- Installation goes at the bottom.
- **Do not inflate.** Do not describe a side project as a service.

⚠️ ***Use only what I gave you. Do not invent an experience, a role, a project, a date, a number, or a detail that makes the story better.*** **Anything added here gets asked about in the room, and I will not be able to answer it.** Where the material is too thin, **say what is missing and ask.**