Opencode Desktop crashes if the soure directory was deleted

### Description

The desktop app doesn't handle the deletion of directory well. 

### Plugins

N/a

### OpenCode version

1.14.44

### Steps to reproduce

1. Use opencode desktop app to open a project and close the app.
2. Delete the project.
3. Opencode crashes and shows an error log.  

### Screenshot and/or share link

_No response_

### Operating System

MacOs 26.4.1

### Terminal

N/A