fix(ui): move correlation duration to far right

ui/src/pages/Exchanges/ExchangeHeader.module.css

@@ -120,7 +120,7 @@
   font-size: 10px;
   font-weight: 600;
   color: var(--text-secondary);
-  margin-right: 0.5rem;
+  margin-left: auto;
   flex-shrink: 0;
 }
 

ui/src/pages/Exchanges/ExchangeHeader.tsx

@@ -93,12 +93,6 @@ export function ExchangeHeader({ detail, onCorrelatedSelect }: ExchangeHeaderPro
       {/* Correlation chain */}
       <div className={styles.chain}>
         <span className={styles.chainLabel}>Correlated</span>
-        {showChain && (() => {
-          const starts = chain.map((ce: any) => new Date(ce.startTime).getTime()).filter((t: number) => !isNaN(t));
-          const ends = chain.map((ce: any) => new Date(ce.endTime ?? ce.startTime).getTime() + (ce.durationMs ?? 0)).filter((t: number) => !isNaN(t));
-          const totalMs = starts.length > 0 && ends.length > 0 ? Math.max(...ends) - Math.min(...starts) : 0;
-          return totalMs > 0 ? <span className={styles.chainTotal}>Duration: {formatDuration(totalMs)}</span> : null;
-        })()}
         {showChain ? chain.map((ce: any, i: number) => {
             const isCurrent = ce.executionId === detail.executionId;
             const variant = statusVariant(ce.status);
@@ -128,6 +122,12 @@ export function ExchangeHeader({ detail, onCorrelatedSelect }: ExchangeHeaderPro
           }) : (
             <span className={styles.chainNone}>no correlated exchanges found</span>
           )}
+        {showChain && (() => {
+          const starts = chain.map((ce: any) => new Date(ce.startTime).getTime()).filter((t: number) => !isNaN(t));
+          const ends = chain.map((ce: any) => new Date(ce.endTime ?? ce.startTime).getTime() + (ce.durationMs ?? 0)).filter((t: number) => !isNaN(t));
+          const totalMs = starts.length > 0 && ends.length > 0 ? Math.max(...ends) - Math.min(...starts) : 0;
+          return totalMs > 0 ? <span className={styles.chainTotal}>Duration: {formatDuration(totalMs)}</span> : null;
+        })()}
       </div>
     </div>
   );