#3635 [Other] Several early setup issues/ model load/ download

说明

I'm using the appimage version Strata-0.2.2-linux-nvidia-cuda12.AppImage and this is what happened to me:

1. Unable to select gguf that i had downloaded already 

<img width="797" height="821" alt="Image" src="https://github.com/user-attachments/assets/2d5c3d6f-0447-4ad1-9070-022d101a7d9d" />

2. Unable to download the model through the appimage on another machine with no supported GPU. The error says there is no supported GPU and doesn't allow to proceed the download.
I just didn't wanted to download the models for (very very long) on a machine that idles over 100W. This is an unnecessary measure. If possible i would appreciate the possibility to proceed the download anyway.

3. As last resort i wanted to download manually but unfortunately, there is no list of official supported sources so i can be sure to download the compatible models that doesn't refuse to load again.