* fix: stabilize agent defaults and repo selector
Co-authored-by: open-swe[bot] <215916821+open-swe[bot]@users.noreply.github.com>
* fix: align default repo selector styling, restore text fallback
Match the repo selector to sibling settings controls (h-7, bg-input/20,
text-xs). Fall back to a text input when the repo list is empty so a
default repo can still be entered.
* fix: make repo selector dropdown more compact
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Co-authored-by: open-swe[bot] <215916821+open-swe[bot]@users.noreply.github.com>