fix: align frontend interfaces with backend DTO field names

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

ui/src/api/queries/admin/opensearch.ts

@@ -2,47 +2,54 @@ import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
 import { adminFetch } from './admin-api';
 
 export interface OpenSearchStatus {
-  connected: boolean;
-  clusterName: string;
+  reachable: boolean;
   clusterHealth: string;
   version: string;
-  numberOfNodes: number;
+  nodeCount: number;
   host: string;
 }
 
 export interface PipelineStats {
   queueDepth: number;
   maxQueueSize: number;
-  totalIndexed: number;
-  totalFailed: number;
-  avgLatencyMs: number;
+  indexedCount: number;
+  failedCount: number;
+  debounceMs: number;
+  indexingRate: number;
+  lastIndexedAt: string | null;
 }
 
 export interface IndexInfo {
   name: string;
   health: string;
-  status: string;
-  docsCount: number;
-  storeSize: string;
+  docCount: number;
+  size: string;
+  sizeBytes: number;
   primaryShards: number;
-  replicas: number;
+  replicaShards: number;
+}
+
+export interface IndicesPageResponse {
+  indices: IndexInfo[];
+  totalIndices: number;
+  totalDocs: number;
+  totalSize: string;
+  page: number;
+  pageSize: number;
+  totalPages: number;
 }
 
 export interface PerformanceStats {
   queryCacheHitRate: number;
   requestCacheHitRate: number;
-  avgQueryLatencyMs: number;
-  avgIndexLatencyMs: number;
-  jvmHeapUsedPercent: number;
+  searchLatencyMs: number;
+  indexingLatencyMs: number;
   jvmHeapUsedBytes: number;
   jvmHeapMaxBytes: number;
 }
 
 export interface IndicesParams {
   search?: string;
-  health?: string;
-  sortBy?: string;
-  sortDir?: 'asc' | 'desc';
   page?: number;
   size?: number;
 }
@@ -65,9 +72,6 @@ export function usePipelineStats() {
 export function useIndices(params: IndicesParams) {
   const query = new URLSearchParams();
   if (params.search) query.set('search', params.search);
-  if (params.health) query.set('health', params.health);
-  if (params.sortBy) query.set('sortBy', params.sortBy);
-  if (params.sortDir) query.set('sortDir', params.sortDir);
   if (params.page !== undefined) query.set('page', String(params.page));
   if (params.size !== undefined) query.set('size', String(params.size));
   const qs = query.toString();
@@ -75,7 +79,7 @@ export function useIndices(params: IndicesParams) {
   return useQuery({
     queryKey: ['admin', 'opensearch', 'indices', params],
     queryFn: () =>
-      adminFetch<{ indices: IndexInfo[]; total: number }>(
+      adminFetch<IndicesPageResponse>(
         `/opensearch/indices${qs ? `?${qs}` : ''}`,
       ),
   });