Vittorio17/map_proj — reverse-engineered prompt

Build me a simple web map project from this repo. The README only shows UML diagrams for the client and server, so please use those diagrams as the main guide and keep the scope focused on what they imply.

I want a user to be able to open the client in a browser, see a map interface, interact with it in the basic ways the design expects, and have the client talk to the server for the needed data or actions. Please fill in the missing pieces so the client and server work together cleanly, with sensible error handling and a straightforward layout.

Make it easy to run locally. Add or update any setup notes so someone can start the server, open the client, and understand what is supposed to happen. If you need current docs for a map library or browser API, look them up online.