fix: Show persistent error card when patch bundle download fails

[Aunali321]

What it does: Shows a persistent warning card on the dashboard when the API URL is invalid/unreachable. Closes #2050

Test steps:

1. Install the APK
2. Go to Settings → Advanced → API URL and set it to something invalid (e.g. https://invalid.example.com)
3. Go back to Dashboard
4. You should see a card saying "Patches could not be downloaded. Check your API URL in settings."
5. Tapping the card should navigate to Settings
6. Fix the API URL back to default. The card should disappear after patches reload

[oSumAtrIX]

This shouldnt just show up for not being able to download patches only but for any api error and should instead say "API not working" similar to the website doing it.

[Ushie]

That can be a separate feat

[Ushie]

But this one should be normalized to also apply to any remote patch bundle

[oSumAtrIX]

This shouldnt be merged as is. The main idea of this PR is to note if the api is down essentially, so its not about patches per se

[Aunali321]

It checks API status not just patches. Updates are also affected for example

[oSumAtrIX]

Then the dialog should say that

[Aunali321]

@oSumAtrIX Message now says "API is not reachable" instead of patches-specific text
@Ushie The error tracking already applies to all remote patch bundles

[oSumAtrIX]

Does it show that when api times out and isnt available? If so, lgtm, its not descriptive though so people would not understand whats going on. Take a peak at how website does it:

you can enter a bogus api:

[Aunali321]

@oSumAtrIX
Yes, it shows when api timeouts. Is this better? Title might a bit large but that's the default value in codebase

[oSumAtrIX]

better but font size is too big. Design can be done by someone else in our team, just the features are important for now