MudEngine Part 4: Single-Player Dioxus GUI

In Part 2 we built a pure Rust REPL that runs in the terminal. The game engine — a World struct with rooms, descriptions, and movement — is independent of any UI layer.

In this part we lift that same engine into a Dioxus GUI. Instead of printing to stdout and reading from stdin, we render:

• A 3×3 grid showing all rooms in the world, with the current room highlighted
• A description panel that shows the current room name, description, and exits
• A command input where the player types navigation commands

The engine logic stays the same. Only the interface changes.

This design — engine separate from UI — is what lets us later replace the GUI with a network protocol for multiplayer.