feat(rag): 补齐知识工作台聚合与转换分层

frontend/src/api/__tests__/knowledgeWorkspace.spec.ts

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+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { getKnowledgeWorkspace } from '../knowledgeWorkspace';
+import { get } from '../request';
+
+vi.mock('../request', () => ({
+  get: vi.fn(),
+}));
+
+describe('knowledge workspace api', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('loads workspace aggregate by store id', () => {
+    getKnowledgeWorkspace('1001');
+
+    expect(get).toHaveBeenCalledWith('/knowledge/workspaces/1001');
+  });
+});

frontend/src/api/knowledgeWorkspace.ts

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+import { get } from './request';
+
+export interface KnowledgeWorkspaceDocument {
+  documentId: string;
+  documentTitle?: string | null;
+  parseStatus?: string | null;
+  indexStatus?: string | null;
+  enabled?: boolean | null;
+  updateTime?: string | null;
+}
+
+export interface KnowledgeWorkspace {
+  storeId: string;
+  storeCode?: string | null;
+  storeName?: string | null;
+  description?: string | null;
+  status?: string | null;
+  remark?: string | null;
+  documentCount: number;
+  parsedDocumentCount: number;
+  parseFailedDocumentCount: number;
+  indexedDocumentCount: number;
+  pendingIndexDocumentCount: number;
+  healthScore: number;
+  embeddingModelId?: string | null;
+  embeddingDimension?: number | null;
+  chunkStrategy?: number | null;
+  chunkSize?: number | null;
+  chunkOverlap?: number | null;
+  indexVersion?: number | null;
+  chunkCount?: number | null;
+  embeddingCount?: number | null;
+  pendingTaskCount?: number | null;
+  publishImpact?: string | null;
+  documents: KnowledgeWorkspaceDocument[];
+}
+
+export function getKnowledgeWorkspace(storeId: string) {
+  return get<KnowledgeWorkspace>(`/knowledge/workspaces/${storeId}`);
+}