Endless "Preparing OpenVino Backend.

## Describe the bug

Endless "Preparing OpenVino Backend.

I installed, launched and it worked. I exited, the next launch didn't work. Stuck.

A clear and concise description of what the bug is.

## To Reproduce

Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

## Expected behavior

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## Screenshots

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## Environment (please complete the following information):

- OS: [e.g. Windows11]
- GPU: Intel Arc A580 8G]
- CPU: 225f
- Version:

## Additional context

Add any other context about the problem here.

No source files or tests are identified in the report. First reproduce the second-launch failure with the OpenVINO backend and collect the missing OS, version, and full hardware details; done means the app completes backend preparation instead of remaining stuck.

Written by the indexing model from the issue text.