Clicking into the message box showed a blue outline around the text
field in addition to the outer container border. The global
:focus-visible rule was applying to the inner input element.
Notes:
- Added a rule that clears outline and box-shadow on focused
descendants of the textarea outer row and the message search bar.
- The outer container keeps its single blue border via the existing
:focus-within rule.
- Not yet verified in a live Fluxer session; the inner input class
names are assumed from the existing selectors.
