fix(ui): use application name as agent name in exchange header

ui/src/pages/Exchanges/ExchangeHeader.tsx

@@ -61,7 +61,7 @@ export function ExchangeHeader({ detail }: ExchangeHeaderProps) {
         {detail.agentId && (
           <>
             <span className={styles.separator} />
-            <span className={styles.agentLabel}>Agent</span>
+            <span className={styles.app}>{detail.applicationName}</span>
             <MonoText size="xs">{detail.agentId}</MonoText>
           </>
         )}