fix: remove duplicate app name from toolbar

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/layout/Toolbar.tsx

@@ -116,10 +116,6 @@ export function Toolbar() {
         </Button>
 
         <div className="flex-1" />
-
-        <span className="text-xs font-semibold text-muted-foreground tracking-wide">
-          TUSK
-        </span>
       </div>
 
       <ConnectionList