Heads up display around my existing terminal? Or terminal in terminal?

[evbo]

Is there a way to use tui-rs to create a sort of "heads up display" around my existing terminal command line prompt?

For instance, I should be able to type standard unix commands, access environment variables, etc, all from a typical user input that looks just like a terminal, but then in the upper sections of the window there would be TUI widgets that perform auto-complete suggestions and other quality of life features to help the user formulate the commands they are trying to run.

For instance, let's say my hypothetical tui-rs application knows about a binary called "desert_locator". When you start typing a desert_locator command, it preempts your input providing suggestions like the following:

_____________________________
|Suggestions (click to autocomplete):
| tapioca
| cookie
|____________________________



$user: desert_locator tap         <-- here is a conventional command line prompt (run ls, grep, etc...)

The key answer I'm looking for: Does this library allow me to still let the user interact with their existing shell/environment in a non-intrusive way? Or would I have to emulate a terminal, passing all user input into a subprocess from Rust and then handle all stdout/stderr?