Various accessibility issues

## Problem

i didn't test any accessibility feature

## Suggested solution

test and support:

- screen reader
- [ ] with flatpak??
- [ ] this mf keeps repeating the title of the window
- [ ] say the subtitle instead?
- HC theme
- [x] 0.6
- [x] 0.8
- visual keyboard
- [x] 0.6
- [x] 0.8

Start by reproducing the unchecked screen-reader cases, including Flatpak behavior and the repeated window title, using the issue checklist. Review the accessibility-related Python entry points you find, then verify completion by testing screen readers, high-contrast themes, and the visual keyboard against the listed cases.

Written by the indexing model from the issue text.