fix(flowpilot): redirect to Active Sessions after closing session

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/pages/FlowPilotSessionPage.tsx

@@ -230,7 +230,10 @@ export default function FlowPilotSessionPage() {
           onEscalate={fp.escalateSession}
           onPause={fp.pauseSession}
           onResume={fp.resumeOwnSession}
-          onAbandon={fp.abandonSession}
+          onAbandon={async () => {
+            await fp.abandonSession()
+            navigate('/sessions')
+          }}
           onRate={fp.rateSession}
           onReloadSession={() => fp.loadSession(fp.session!.id)}
         />