fix(web): 修复 Dashboard 拆分后遗留问题

- dashboardConstants.ts → .tsx (包含 JSX 不能在 .ts 中)
- dashboardTypes.ts: AggregateItem 从 pluginData 导入而非 plugins
- PluginDashboardPage.tsx: 移除未使用的 Spin 导入

apps/web/src/pages/PluginDashboardPage.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState, useMemo, useCallback } from 'react';
 import { useParams } from 'react-router-dom';
-import { Row, Col, Empty, Select, Spin, theme } from 'antd';
+import { Row, Col, Empty, Select, theme } from 'antd';
 import { DashboardOutlined } from '@ant-design/icons';
 import { countPluginData, aggregatePluginData } from '../api/pluginData';
 import {

apps/web/src/pages/dashboard/dashboardTypes.ts

@@ -1,5 +1,6 @@
 import type React from 'react';
-import type { AggregateItem, DashboardWidget } from '../../api/plugins';
+import type { AggregateItem } from '../../api/pluginData';
+import type { DashboardWidget } from '../../api/plugins';
 
 // ── 类型定义 ──