You’ve just entered a rabbit hole that will push the boundaries of your control on your system.
Now, I’m not 100% sure that I’ve correctly understand what you’re looking for. If you’re after a file manager for nvim or tmux, then I would second yazi for your terminal as previously mentioned. Or you could go bare bone and use the command line straight with the help of some features like zsh and its competition, call to past arguments, zmv (and glob expression)…
For nvim, you can use the default tree explorer for basic usage. More advanced features can be found with telescope for example. I personaly opted for fzf-lua. Both can be used in other plugins as well to make things very easy and powerful. Just to cite a few, I’m using fzf-lua with obsidian (which, despite the name, doesn’t require the tool of the same name) and snacks.
I had some similar concerns before buying my Framework 13. The community here helped me a lot to confirm that this is a great laptop. After 3 months of use I’m still in love with it (got mine on sale).
I had a Dell XPS 13 before that, and tested lots of mainstream brands over the years (Lenovo, Acer, Vaio… and dinosaurs like PB, Toshiba). All within a budget of ~$1200-$1500. They all did a decent job and the XPS13 was certainly the best, but they all end up going to the trash because of hardware failure after 4 years max.
I wanted to move to a company that cares about Linux and with Framework, hardware issues will not cause death of my machine anymore. I’ll be able to have my machine longer, or upgrade it for a fraction of the price of a new laptop.
https://www-gem.codeberg.page/sys_Framework13-1/ https://www-gem.codeberg.page/sys_Framework13-2/
Also, along my research before opting for Framework, I’ve heard mostly about starlab, purism, tuxedo, and system76. There’s obviously pros and cons for each brand as well as difference in opinions based on individual experience, but a common criticism for these (including Framework) less marketed brands is the price of their machines. Lots of people don’t realize that there’s reasons for a slightly high price.