fix: improve face detail navigation context matching

- Simplified trace matching to use only trace_id (removed file_uuid requirement)
- Added debug logging to trace navigation context setup
- Added pointer-events: none to modal overlay to allow arrow clicks
- Moved navigation arrows outside modal overlay for proper z-index stacking

src/views/PeopleView.vue

@@ -2523,44 +2523,63 @@ async function openFaceDetailFromTrace(t: any) {
 }
 
 function setFaceDetailNavContext(t: any) {
+  console.log('[nav] setFaceDetailNavContext called for trace:', t.trace_id, 'file_uuid:', t.file_uuid)
+  console.log('[nav] traceGroupMap keys:', Object.keys(traceGroupMap.value).length)
+  console.log('[nav] clusterResults:', clusterResults.value.length)
+  console.log('[nav] filteredUnassignedTraces:', filteredUnassignedTraces.value.length)
+
   // The trace's own group takes priority — navigation is limited to that group
   const groupName = traceGroupMap.value[String(t.trace_id)]
+  console.log('[nav] groupName for trace:', t.trace_id, '=', groupName)
+
   if (groupName) {
     const cluster = clusterResults.value.find((c: any) => c.name === groupName)
+    console.log('[nav] cluster found:', !!cluster)
     if (cluster) {
       const traces = filteredGroupTraces(cluster)
+      console.log('[nav] filteredGroupTraces count:', traces.length)
       const cIdx = traces.findIndex((x: any) => x.trace_id === t.trace_id)
+      console.log('[nav] findIndex result:', cIdx)
       if (cIdx >= 0) {
         faceDetailNavSource.value = 'cluster'
         faceDetailNavIndex.value = cIdx
+        console.log('[nav] cluster context:', { source: 'cluster', index: cIdx, total: traces.length })
         return
       }
     }
   }
   // Truly unassigned traces (already filtered out grouped ones), filter-aware
+  console.log('[nav] filteredUnassignedTraces sample:', filteredUnassignedTraces.value.slice(0, 2))
   const uIdx = filteredUnassignedTraces.value.findIndex(
-    (x: any) => x.trace_id === t.trace_id && x.file_uuid === t.file_uuid
+    (x: any) => x.trace_id === t.trace_id
   )
+  console.log('[nav] unassigned findIndex result:', uIdx)
   if (uIdx >= 0) {
     faceDetailNavSource.value = 'unassigned'
     faceDetailNavIndex.value = uIdx
+    console.log('[nav] unassigned context:', { source: 'unassigned', index: uIdx, total: filteredUnassignedTraces.value.length })
     return
   }
   faceDetailNavSource.value = null
   faceDetailNavIndex.value = -1
+  console.log('[nav] no context:', { source: null, index: -1, unassigned: filteredUnassignedTraces.value.length, clusterResults: clusterResults.value.length })
 }
 
 function goFaceDetailPrev() {
+  console.log('[nav] goFaceDetailPrev called, canFaceDetailPrev:', canFaceDetailPrev.value, 'index:', faceDetailNavIndex.value, 'list:', faceDetailNavList.value.length)
   if (!canFaceDetailPrev.value) return
   faceDetailNavIndex.value--
   const prev = faceDetailNavList.value[faceDetailNavIndex.value]
+  console.log('[nav] goFaceDetailPrev prev:', prev?.trace_id)
   if (prev) openFaceDetailFromTrace(prev)
 }
 
 function goFaceDetailNext() {
+  console.log('[nav] goFaceDetailNext called, canFaceDetailNext:', canFaceDetailNext.value, 'index:', faceDetailNavIndex.value, 'list:', faceDetailNavList.value.length)
   if (!canFaceDetailNext.value) return
   faceDetailNavIndex.value++
   const next = faceDetailNavList.value[faceDetailNavIndex.value]
+  console.log('[nav] goFaceDetailNext next:', next?.trace_id)
   if (next) openFaceDetailFromTrace(next)
 }
 
@@ -2779,6 +2798,7 @@ function faceCtxAction(action: string) {
   faceCtxMenu.value.show = false
   if (action === 'detail') {
     faceDetailModal.value = { show: true, candidate: c, newIdentityName: '' }
+    setFaceDetailNavContext(c)
     loadCandidateThumb(c)
   }
 }
@@ -4210,8 +4230,9 @@ h1 { margin: 0; }
 .ms-ctx-history-btn { padding: 2px 6px !important; font-size: 12px !important; min-width: 24px; }
 
 /* Modal overlay */
-.ms-modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 9998; align-items: center; justify-content: center; }
+.ms-modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 9998; align-items: center; justify-content: center; pointer-events: none; }
 .ms-modal-overlay.show { display: flex; }
+.ms-modal-overlay .ms-modal { pointer-events: auto; }
 .close-btn { position: absolute; top: 16px; right: 16px; }
 .fs-delete-btn { position: absolute; top: 16px; right: 56px; color: var(--text-secondary); }
 .fs-delete-btn:hover { color: var(--danger-color); }