feat(vector_db): Implement Vector Database Service with multiple providers

web/src/api/vectorDB.ts

@@ -1,5 +1,65 @@
 import client from './client';
 
+export interface VectorDBIndexInfo {
+  index_name: string;
+  index_type?: string;
+  metric_type?: string;
+  indexed_rows: number;
+  pending_index_rows: number;
+  state?: string;
+}
+
+export interface VectorDBCollectionStats {
+  name: string;
+  row_count: number;
+  dimension: number | null;
+  estimated_memory_bytes: number;
+  is_vector_collection: boolean;
+  indexes: VectorDBIndexInfo[];
+}
+
+export interface VectorDBStats {
+  collections: VectorDBCollectionStats[];
+  collection_count: number;
+  total_vectors: number;
+  estimated_total_memory_bytes: number;
+  db_file_size_bytes: number | null;
+}
+
+export interface VectorDBProviderField {
+  key: string;
+  label: string;
+  type: 'text' | 'password';
+  required?: boolean;
+  default?: string;
+  placeholder?: string;
+}
+
+export interface VectorDBProviderMeta {
+  type: string;
+  label: string;
+  description?: string;
+  enabled: boolean;
+  config_schema: VectorDBProviderField[];
+}
+
+export interface VectorDBCurrentConfig {
+  type: string;
+  config: Record<string, string>;
+  label?: string;
+  enabled?: boolean;
+}
+
+export interface UpdateVectorDBConfigResponse {
+  config: VectorDBCurrentConfig;
+  stats: VectorDBStats;
+}
+
 export const vectorDBApi = {
+  getProviders: () => client<VectorDBProviderMeta[]>('/vector-db/providers', { method: 'GET' }),
+  getConfig: () => client<VectorDBCurrentConfig>('/vector-db/config', { method: 'GET' }),
+  getStats: () => client<VectorDBStats>('/vector-db/stats', { method: 'GET' }),
+  updateConfig: (payload: { type: string; config: Record<string, string> }) =>
+    client<UpdateVectorDBConfigResponse>('/vector-db/config', { method: 'POST', json: payload }),
   clearAll: () => client('/vector-db/clear-all', { method: 'POST' }),
-};
+};