Does anyone happen to know if there is a terminal IDE that more or less operates like the very basics of popular GUI IDEs? By this I mean has a file manager pane which can be manipulated by mouse, allows multiple open tabs which are selectable and closable by mouse, is generally mouse-aware with regard to cursor activity on the text, and operates as a regular user would expect (not modal)? The closest thing I've found to this is Micro, but the full IDE experience is missing.

I know mouse-aware file manager and tab capabilities are possible in terminal IDEs, but I haven't seen anything that simply put it all together as a cohesive and easy-to-use whole that anyone who has used VSCode could quickly start using for basic editing of multiple files in a project.

Try https://github.com/AstroNvim/AstroNvim, mouse works nicely out of the box, there is also a files tree.