Bugs encountered in V2.2b

1.Settings cannot correctly save the model placement path. After I set the path and apply it, when I restart the program and check the model path page again, two issues arise: First, the interface does not display the detailed path address; Second, all paths have been changed to the last path I previously set.

## Screenshots

2.When downloading a model from Hugging Face, an error will definitely occur halfway through the download, prompting that the download has failed. When attempting to re-download, it will prompt that the model already exists and cannot be downloaded further. Upon locating the storage path of the model, it is found that only part of the model has been downloaded.

3.I am unable to download any of the default Q&A models provided by AI Playground. Either the "confirm download" button is unclickable on the download page, or when adding a new model, it prompts that the model already exists, even though I cannot find it in my local files.


## Environment (please complete the following information):

- OS: [Windows11]
- GPU: [Intel Arc A750]
- CPU: [i5-10600K]
- Version: [V2.2b]

## Additional context

Add any other context about the problem here.