feat: set default preview when stream can't be found anymore

[BeierKevin]

PR description

Describe your changes in detail here

If you have a program like Notepad or any other application open and selected for preview, when you close the Notepad application, the stream handler will react to it by fetching the capturable sources again and setting the main screen as the default preview. If you close Notepad and it is not the current preview, it will only trigger a refetch for the sources, ensuring that the sources tab with screens and applications is always up to date.

However, this does not happen when you open an application. I believe it is not possible with Electron to trigger a refetch automatically when opening an application. In such cases, you can simply press the refresh button, which does the job and should be sufficient.

Additionally, I added workspace settings which we should have done probably a lot earlier, which formats the code on save for everyone should be enabled per person. This was not part for this issue but noticed it and thought why not just add it.

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fix: #71

[BeierKevin]

I think this implementation satisfies what the issue #71 suggests but it would be possible to rewrite the streamhandler like a composable and utilise Vue related functionalities like watching etc. to improve performance and the user experience with everything. Could be a harder issue to tackle, tho.

And more like writing an composable instead of an singelton

[Claiyc]

Attached issue seems to be solved. However upon closer examination of the source capturing, I ran into quite a few issues with capturining specific applications. The actual applications are often cut off / the view does not show the entire application.

Funny thing is that while I drag the selected application or use WIN+SHIFT+S for taking the screenshot, the preview adjusts and shows the entire application (as it should normally).
This issue does not seem related to specific changes in this PR. The same issue occurs on feat/182

[BeierKevin]

Huh I did not have these issues or at least didn't try that much out, but is this related to this implementation really or was this already before ?

[Claiyc]

Huh I did not have these issues or at least didn't try that much out, but is this related to this implementation really or was this already before ?

It was an issue before already

[Claiyc]

Please resolve conflicts before next review

[BeierKevin]

Huh I did not have these issues or at least didn't try that much out, but is this related to this implementation really or was this already before ?

It was an issue before already

Ahh ok

[Claiyc]

lgtm