diff --git a/src/views/PeopleView.vue b/src/views/PeopleView.vue
index f82d4f0..985cfb9 100644
--- a/src/views/PeopleView.vue
+++ b/src/views/PeopleView.vue
@@ -326,6 +326,7 @@
           <div class="ms-face-detail-info">
             <div class="ms-face-detail-title">
               <span class="ms-face-trace-id">{{ faceDetailModal.candidate?.file_uuid }}:FS#{{ faceDetailModal.candidate?.trace_id }}</span>
+              <span class="ms-nav-debug" style="font-size:10px;color:#888;margin-left:8px;">nav:{{ faceDetailNavSource || 'null' }} idx:{{ faceDetailNavIndex }} list:{{ faceDetailNavList.length }}</span>
             </div>
             <div class="ms-face-detail-row">
               <span class="ms-face-detail-value">F{{ faceDetailModal.candidate?.start_frame }}–[F{{ faceDetailModal.candidate?.frame_number }}]–F{{ faceDetailModal.candidate?.end_frame }} {{ faceDetailModal.candidate?.frame_count }} Frames</span>