Revert "fix: load cluster names before saving to cache"

This reverts commit 48bcd84528.

src/store.ts

@@ -335,7 +335,20 @@ export async function pollClusterResults(fileUuid: string, onDone?: (results: an
 export async function loadClusterNames(fileUuid: string, clusters: any[]) {
   console.log('[loadClusterNames] loading names for', clusters.length, 'clusters')
   const promises = clusters.map(async (c) => {
-    // Always load name from trace profile (DB is source of truth for custom names)
+    // Only load name from DB if cluster has no meaningful name
+    // "Person_X" names from clustering are considered meaningful
+    // Only replace "Unassigned", empty, or auto-generated trace names
+    const currentName = c.name || ''
+    const isAutoGenerated = currentName === 'Unassigned' || 
+                            currentName === '' || 
+                            currentName.startsWith('Face Trace ') || 
+                            currentName.startsWith('Trace ')
+    
+    if (!isAutoGenerated) {
+      // Cluster already has a meaningful name (e.g., Person_X from clustering or custom name), don't overwrite
+      return
+    }
+    
     const repTid = c.representative_trace !== undefined && c.representative_trace !== null ? c.representative_trace : c.trace_ids?.[0]
     if (repTid != null) {
       try {

src/views/PeopleView.vue

@@ -296,10 +296,10 @@
     <!-- Assign modal -->
     <!-- Face detail modal -->
     <!-- Side navigation arrows - outside overlay for proper z-index stacking -->
-    <button v-if="faceDetailModal.show && canFaceDetailPrev" class="ms-fs-nav-arrow ms-fs-nav-prev" @click="() => { navClickCount++; console.log('[nav] PREV CLICKED'); goFaceDetailPrev(); }" title="Previous FS (←)" :style="{ zIndex: faceDetailZIndex + 100, pointerEvents: 'auto' }">
+    <button v-if="faceDetailModal.show && canFaceDetailPrev" class="ms-fs-nav-arrow ms-fs-nav-prev" @click="goFaceDetailPrev" title="Previous FS (←)" :style="{ zIndex: faceDetailZIndex + 100 }">
       <svg width="24" height="24" viewBox="0 0 24 24" fill="none"><polyline points="15 18 9 12 15 6" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
     </button>
-    <button v-if="faceDetailModal.show && canFaceDetailNext" class="ms-fs-nav-arrow ms-fs-nav-next" @click="() => { navClickCount++; console.log('[nav] NEXT CLICKED'); goFaceDetailNext(); }" title="Next FS (→)" :style="{ zIndex: faceDetailZIndex + 100, pointerEvents: 'auto' }">
+    <button v-if="faceDetailModal.show && canFaceDetailNext" class="ms-fs-nav-arrow ms-fs-nav-next" @click="goFaceDetailNext" title="Next FS (→)" :style="{ zIndex: faceDetailZIndex + 100 }">
       <svg width="24" height="24" viewBox="0 0 24 24" fill="none"><polyline points="9 18 15 12 9 6" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>
     </button>
     <div v-if="faceDetailModal.show" class="ms-modal-overlay show" :style="{ zIndex: faceDetailZIndex }" @click.self="faceDetailModal.show = false">
@@ -326,7 +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 }} clicks:{{ navClickCount }}</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>
@@ -1003,7 +1003,6 @@ const traceProfileJsonTitle = ref('')
 const faceDetailModal = ref({ show: false, candidate: null as any, newIdentityName: '' })
 const faceDetailNavSource = ref<'unassigned' | 'cluster' | null>(null)
 const faceDetailNavIndex = ref(-1)
-const navClickCount = ref(0)
 const regeneratingThumbnail = ref(false)
 const clusterDetailModal = ref({ show: false, cluster: null as any, selectedTrace: null as any })
 const clusterVideoTraces = ref<any[]>([])
@@ -2128,14 +2127,14 @@ async function loadClusterResults() {
       }
     }
     if (groups.length) {
-      // Load trace profiles for names FIRST (DB is source of truth for custom names)
-      await loadClusterNames(fileUuid, groups)
-      
       console.log('[loadClusterResults] Calling setClusterResults with', groups.length, 'groups')
       console.log('[loadClusterResults] First group trace_ids:', groups[0]?.trace_ids)
       setClusterResults(fileUuid, groups)
       console.log('[loadClusterResults] After setClusterResults, cache:', clusterResultsCache.value[fileUuid]?.length)
 
+      // Load trace profiles for names in background (non-blocking)
+      loadClusterNames(fileUuid, groups).catch(() => {})
+
       // Load thumbnails for cluster representatives immediately.
       // rep 資料只需 file_uuid + trace_id，皆已存在 cluster-results payload 中，
       // 不需等待慢速的 get_unassigned_traces（~5s/page）。