fix: resolve TypeScript build errors in admin learning pages

- Remove 5 unused antd imports (Card, Descriptions, message, Spin, Alert)
- Add PaginatedResponse<T> interface for typed API responses
- Add explicit return types to all learningAdminAPI functions
- Remove unused isLoading from UserDiagnosePage / MaterialDiagnosePage

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/pages/learning/DataPages.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react';
-import { Table, Card, Input, Select, Space, Tag, Descriptions, Button, message, Spin, Alert, Tabs } from 'antd';
+import { Table, Input, Select, Space, Tag, Button, Tabs } from 'antd';
 import { useQuery } from '@tanstack/react-query';
 import { learningAdminAPI } from '../../services/learningAdmin';
 
@@ -171,7 +171,7 @@ export function AnomalyPage() {
 
 export function UserDiagnosePage() {
   const [userId, setUserId] = useState('');
-  const { data, isLoading, refetch } = useQuery({
+  const { data, refetch } = useQuery({
     queryKey: ['admin-user-diag', userId],
     queryFn: () => learningAdminAPI.getUserDiagnose(userId),
     enabled: false,
@@ -183,7 +183,7 @@ export function UserDiagnosePage() {
         <Input placeholder="User ID" value={userId} onChange={e => setUserId(e.target.value)} style={{ width: 300 }} />
         <Button type="primary" onClick={() => refetch()}>查询</Button>
       </Space>
-      {data && <pre style={{ background: '#f5f5f5', padding: 16, borderRadius: 8, overflow: 'auto', maxHeight: 600 }}>{JSON.stringify(data, null, 2)}</pre>}
+      {data ? <pre style={{ background: '#f5f5f5', padding: 16, borderRadius: 8, overflow: 'auto', maxHeight: 600 }}>{JSON.stringify(data, null, 2)}</pre> : null}
     </PageWrapper>
   );
 }
@@ -192,7 +192,7 @@ export function UserDiagnosePage() {
 
 export function MaterialDiagnosePage() {
   const [materialId, setMaterialId] = useState('');
-  const { data, isLoading, refetch } = useQuery({
+  const { data, refetch } = useQuery({
     queryKey: ['admin-mat-diag', materialId],
     queryFn: () => learningAdminAPI.getMaterialDiagnose(materialId),
     enabled: false,
@@ -204,7 +204,7 @@ export function MaterialDiagnosePage() {
         <Input placeholder="Material ID" value={materialId} onChange={e => setMaterialId(e.target.value)} style={{ width: 300 }} />
         <Button type="primary" onClick={() => refetch()}>查询</Button>
       </Space>
-      {data && <pre style={{ background: '#f5f5f5', padding: 16, borderRadius: 8, overflow: 'auto', maxHeight: 600 }}>{JSON.stringify(data, null, 2)}</pre>}
+      {data ? <pre style={{ background: '#f5f5f5', padding: 16, borderRadius: 8, overflow: 'auto', maxHeight: 600 }}>{JSON.stringify(data, null, 2)}</pre> : null}
     </PageWrapper>
   );
 }

src/services/learningAdmin.ts

@@ -1,5 +1,15 @@
 const BASE = '/api/admin/learning';
 
+export interface PaginatedResponse<T> {
+  items: T[];
+  total: number;
+}
+
+interface AnomalyData {
+  deltaOutliers: unknown[];
+  futureEvents: unknown[];
+}
+
 async function getApi<T>(path: string, params?: Record<string, any>): Promise<T> {
   let url = `${BASE}${path}`;
   if (params) {
@@ -35,17 +45,17 @@ export interface DashboardData {
 
 export const learningAdminAPI = {
   getDashboard: () => getApi<DashboardData>('/dashboard'),
-  getReadingEvents: (params?: Record<string, any>) => getApi('/reading-events', params),
+  getReadingEvents: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/reading-events', params),
-  getFailedEvents: (params?: Record<string, any>) => getApi('/reading-events/failed', params),
+  getFailedEvents: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/reading-events/failed', params),
-  getSessions: (params?: Record<string, any>) => getApi('/sessions', params),
+  getSessions: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/sessions', params),
-  getProgress: (params?: Record<string, any>) => getApi('/progress', params),
+  getProgress: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/progress', params),
-  getDailyActivities: (params?: Record<string, any>) => getApi('/daily-activities', params),
+  getDailyActivities: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/daily-activities', params),
-  getRecords: (params?: Record<string, any>) => getApi('/records', params),
+  getRecords: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/records', params),
-  getUserTimeline: (userId: string) => getApi('/user-timeline', { userId }),
+  getUserTimeline: (userId: string) => getApi<unknown>('/user-timeline', { userId }),
-  getUserDiagnose: (userId: string) => getApi('/user-diagnose', { userId }),
+  getUserDiagnose: (userId: string) => getApi<unknown>('/user-diagnose', { userId }),
-  getMaterialDiagnose: (materialId: string) => getApi('/material-diagnose', { materialId }),
+  getMaterialDiagnose: (materialId: string) => getApi<unknown>('/material-diagnose', { materialId }),
-  getAnomalies: () => getApi('/anomalies'),
+  getAnomalies: () => getApi<AnomalyData>('/anomalies'),
-  getTemporaryMaterials: (params?: Record<string, any>) => getApi('/temporary-materials', params),
+  getTemporaryMaterials: (params?: Record<string, any>) => getApi<PaginatedResponse<unknown>>('/temporary-materials', params),
-  recalculate: () => postApi('/recalculate'),
+  recalculate: () => postApi<unknown>('/recalculate'),
-  exportData: (type: string) => getApi('/export', { type }),
+  exportData: (type: string) => getApi<unknown>('/export', { type }),
 };