fix: initial textinput size

[alcpereira]

Summary

When the filters are too long, the TextInput wraps into a new line with a visual artifact.
This might be an issue with BubbleTea itself, but let me know if I should try to fix it here or in BubbleTea.

I reused the same values as getInputWidth.

Note: This is my first Go and BubbleTea contribution 🎉

How did you test this change?

I reproduce the issue locally with the following settings:

prSections:
  - title: Very long PR filter
    filters: is:open very very very very very very very very very very very very very very very very very long review:required sort:created-asc

issuesSections:
  - title: Very long Issue filter
    filters: is:open very very very very very very very very very very very very very very very very very long review:required sort:created-asc

I tested the changes with both focusing on the search and without. Seems to work as expected.

Video

Before

Screen.Recording.2024-11-05.at.00.07.39.mov

After

Screen.Recording.2024-11-05.at.00.06.33.mov

[dlvhdr]

Thanks, it looks great!