🔇 fix: Hide Button Icons from Screen Readers (#10776)

If you've got a screen reader that is reading out the whole page,
each icon button (i.e., `<button><SVG></button>`) will have both
the button's aria-label read out as well as the title from the
SVG (which is usually just "image").

Since we are pretty good about setting aria-labels, we should instead
use `aria-hidden="true"` on these images, since they are not useful
to be read out.

I don't consider this a comprehensive review of all icons in the app,
but I knocked out all the low hanging fruit in this commit.

client/src/components/Agents/AgentDetail.tsx

@@ -142,7 +142,7 @@ const AgentDetail: React.FC<AgentDetailProps> = ({ agent, isOpen, onClose }) =>
           onClick={handleCopyLink}
           title={localize('com_agents_copy_link')}
         >
-          <Link />
+          <Link aria-hidden="true" />
         </Button>
 
         {/* Agent avatar - top center */}