fuzzy weird shadow in dark mode on edge impacts readability.

- [x] I am on the [latest](https://github.com/ActivityWatch/activitywatch/releases/latest) ActivityWatch version.
- [x] I have searched the issues of this repo and believe that this is not a duplicate.

- **OS name and version**: Windows 10
- **ActivityWatch version**: v0.13.2

## Describe the bug
The text shadow displays weirdly, almost non-existant when displayed on the Edge browser. This impacts readability.

## To Reproduce
1. Apply dark theme.
2. Open Activity page with Edge.
3. Try to read Application names or Top Windows titles. Comparing with another browser can help.

## Expected behavior
Text should be as readable in Edge than in Firefox, where it displays fine.

## Documentation
faulty display screenshot:

## Additional context
I patch it by applying a 1px shadow instead of the original 0.5px (.text .svg class in dark.css):