feat: add Face Group search mode back to SearchView

- Add 'Face Group' mode to search modes
- Use search_identities API temporarily
- Update summary: 'Identity' → 'FS'
- Will replace with Core Team's search_tkg_node_face_trace_profile API

src/views/SearchView.vue

@@ -263,6 +263,7 @@ const modes = [
   { label: 'Keyword', value: 'keyword', icon: '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><line x1="8" y1="6" x2="21" y2="6"/><line x1="8" y1="12" x2="21" y2="12"/><line x1="8" y1="18" x2="21" y2="18"/><line x1="3" y1="6" x2="3.01" y2="6"/><line x1="3" y1="12" x2="3.01" y2="12"/><line x1="3" y1="18" x2="3.01" y2="18"/></svg>' },
   { label: 'Semantic', value: 'semantic', icon: '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>' },
   { label: 'Agent', value: 'agent', icon: '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><line x1="22" y1="12" x2="18" y2="12"/><line x1="6" y1="12" x2="2" y2="12"/><line x1="12" y1="6" x2="12" y2="2"/><line x1="12" y1="22" x2="12" y2="18"/></svg>' },
+  { label: 'Face Group', value: 'people', icon: '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M23 21v-2a4 4 0 0 0-3-3.87"/><path d="M16 3.13a4 4 0 0 1 0 7.75"/></svg>' },
 ]
 
 const mode = ref(localStorage.getItem('ms_chat_mode_v1') || 'keyword')
@@ -726,7 +727,7 @@ async function sendMessage() {
       const results = (Array.isArray(raw) ? raw : []).filter((p: any) => p.file_uuid).map((p: any) => ({
         file_uuid: p.file_uuid,
         file_name: p.name,
-        summary: `Identity - ${p.source || 'unknown'}`,
+        summary: `FS - ${p.source || 'unknown'}`,
         similarity: 1.0,
         start_frame: p.startFrame || p.start_frame,
         end_frame: p.endFrame || p.end_frame,