Search field uses near-invisible border color

[AugustSaintFreytag]

For a couple of versions now, Fork uses an effectively invisible grey tone for the border of the search text input. Looking closer at it, it seems other border colors may be oddly light as well, like the sidebar divider.

Observed on Fork versions 2.60.4–2.67.1 on macOS Sonoma 15.7.2.