fix(web): 修复 TypeScript 编译错误 — 10 处类型/未使用变量问题

- EntitySelect: 未使用的 searchFields 改为 _searchFields
- PluginKanbanPage: DragEndEvent/DragStartEvent 改为 type import, lane_order 改为 optional
- PluginDashboardPage: 添加 PluginPageSchema import, 移除未使用的 CHART_COLORS/palette/totalCount
- PluginGraphPage: 移除未使用的 Title/textColor, 修复 hovered → hoverState

apps/web/src/pages/PluginKanbanPage.tsx

@@ -3,14 +3,13 @@ import { useParams } from 'react-router-dom';
 import { Card, Spin, Typography, Tag, message } from 'antd';
 import {
   DndContext,
-  DragEndEvent,
   DragOverlay,
-  DragStartEvent,
   PointerSensor,
   useSensor,
   useSensors,
   closestCorners,
 } from '@dnd-kit/core';
+import type { DragEndEvent, DragStartEvent } from '@dnd-kit/core';
 import { listPluginData, patchPluginData } from '../api/pluginData';
 import { getPluginSchema, type PluginPageSchema } from '../api/plugins';
 
@@ -255,7 +254,7 @@ export default function PluginKanbanPageRoute() {
   const [pageConfig, setPageConfig] = useState<{
     entity: string;
     lane_field: string;
-    lane_order: string[];
+    lane_order?: string[];
     card_title_field: string;
     card_subtitle_field?: string;
     card_fields?: string[];