🔇 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/Chat/Menus/UI/TitleButton.tsx

@@ -22,7 +22,7 @@ export default function TitleButton({ primaryText = '', secondaryText = '' }) {
           <span className="text-text-primary"> {primaryText} </span>
           {!!secondaryText && <span className="text-token-text-secondary">{secondaryText}</span>}
         </div>
-        <ChevronDown className="text-token-text-secondary size-4" />
+        <ChevronDown className="text-token-text-secondary size-4" aria-hidden="true" />
       </button>
     </Trigger>
   );