feat(knowledge-management): 添加知识管理搜索功能和统计接口

- 新增知识条目搜索查询和响应DTO
- 实现知识管理统计功能，包括总数、文件数和总大小
- 添加数据库查询方法支持文件搜索和统计计算
- 创建知识条目搜索控制器提供REST API
- 在前端添加知识管理搜索页面和相关组件
- 更新前端路由配置添加搜索页面入口
- 移除RAG索引服务中的重复统计功能
- 优化前端页面统计数据显示和刷新逻辑

frontend/src/pages/KnowledgeBase/Home/KnowledgeBasePage.tsx

@@ -1,48 +1,23 @@
-import { useCallback, useEffect, useState } from "react";
-import { Card, Button, Table, Tooltip, message, Statistic } from "antd";
+import { useState } from "react";
+import { Card, Button, Table, Tooltip, message } from "antd";
 import { DeleteOutlined, EditOutlined } from "@ant-design/icons";
 import { SearchControls } from "@/components/SearchControls";
 import { useNavigate } from "react-router";
 import CardView from "@/components/CardView";
 import {
   deleteKnowledgeBaseByIdUsingDelete,
-  getKnowledgeBaseStatisticsUsingGet,
   queryKnowledgeBasesUsingPost,
 } from "../knowledge-base.api";
 import useFetchData from "@/hooks/useFetchData";
-import { KnowledgeBaseItem, KnowledgeBaseStatistics } from "../knowledge-base.model";
+import { KnowledgeBaseItem } from "../knowledge-base.model";
 import CreateKnowledgeBase from "../components/CreateKnowledgeBase";
 import { mapKnowledgeBase } from "../knowledge-base.const";
-import { formatBytes } from "@/utils/unit";
-
-type StatisticsItem = {
-  title: string;
-  value: number | string;
-};
-
-const DEFAULT_STATISTICS: StatisticsItem[] = [
-  {
-    title: "知识库总数",
-    value: 0,
-  },
-  {
-    title: "文件总数",
-    value: 0,
-  },
-  {
-    title: "总大小",
-    value: "0 B",
-  },
-];
 
 export default function KnowledgeBasePage() {
   const navigate = useNavigate();
   const [viewMode, setViewMode] = useState<"card" | "list">("card");
   const [isEdit, setIsEdit] = useState(false);
   const [currentKB, setCurrentKB] = useState<KnowledgeBaseItem | null>(null);
-  const [statisticsData, setStatisticsData] = useState<StatisticsItem[]>(
-    DEFAULT_STATISTICS
-  );
   const {
     loading,
     tableData,
@@ -57,43 +32,11 @@ export default function KnowledgeBasePage() {
     (kb) => mapKnowledgeBase(kb, false) // 在首页不显示索引模型和文本理解模型字段
   );
 
-  const fetchStatistics = useCallback(async () => {
-    try {
-      const { data } = await getKnowledgeBaseStatisticsUsingGet();
-      const stats = data as KnowledgeBaseStatistics | undefined;
-      setStatisticsData([
-        {
-          title: "知识库总数",
-          value: stats?.totalKnowledgeBases ?? 0,
-        },
-        {
-          title: "文件总数",
-          value: stats?.totalFiles ?? 0,
-        },
-        {
-          title: "总大小",
-          value: formatBytes(stats?.totalSize ?? 0),
-        },
-      ]);
-    } catch {
-      message.error("统计数据加载失败");
-      setStatisticsData(DEFAULT_STATISTICS);
-    }
-  }, []);
-
-  const refreshAll = useCallback(async () => {
-    await Promise.all([fetchData(), fetchStatistics()]);
-  }, [fetchData, fetchStatistics]);
-
-  useEffect(() => {
-    fetchStatistics();
-  }, [fetchStatistics]);
-
   const handleDeleteKB = async (kb: KnowledgeBaseItem) => {
     try {
       await deleteKnowledgeBaseByIdUsingDelete(kb.id);
       message.success("知识库删除成功");
-      await refreshAll();
+      fetchData();
     } catch {
       message.error("知识库删除失败");
     }
@@ -197,7 +140,7 @@ export default function KnowledgeBasePage() {
             isEdit={isEdit}
             data={currentKB}
             onUpdate={() => {
-              refreshAll();
+              fetchData();
             }}
             onClose={() => {
               setIsEdit(false);
@@ -207,20 +150,6 @@ export default function KnowledgeBasePage() {
         </div>
       </div>
 
-      <div className="grid grid-cols-1 gap-4">
-        <Card>
-          <div className="grid grid-cols-3">
-            {statisticsData.map((item) => (
-              <Statistic
-                title={item.title}
-                key={item.title}
-                value={`${item.value}`}
-              />
-            ))}
-          </div>
-        </Card>
-      </div>
-
       <SearchControls
         searchTerm={searchParams.keyword}
         onSearchChange={handleKeywordChange}
@@ -231,7 +160,7 @@ export default function KnowledgeBasePage() {
         viewMode={viewMode}
         onViewModeChange={setViewMode}
         showViewToggle
-        onReload={refreshAll}
+        onReload={fetchData}
       />
       {viewMode === "card" ? (
         <CardView

frontend/src/pages/KnowledgeBase/knowledge-base.api.ts

@@ -38,11 +38,6 @@ export function queryKnowledgeBaseFilesSearchUsingGet(params: RequestParams) {
   return get("/api/knowledge-base/files/search", params);
 }
 
-// 获取知识库统计
-export function getKnowledgeBaseStatisticsUsingGet() {
-  return get("/api/knowledge-base/statistics");
-}
-
 // 添加文件到知识库
 export function addKnowledgeBaseFilesUsingPost(baseId: string, data: RequestPayload) {
   return post(`/api/knowledge-base/${baseId}/files`, data);

frontend/src/pages/KnowledgeBase/knowledge-base.model.ts

@@ -25,12 +25,6 @@ export interface KnowledgeBaseItem {
   chat: never;
 }
 
-export interface KnowledgeBaseStatistics {
-  totalKnowledgeBases: number;
-  totalFiles: number;
-  totalSize: number;
-}
-
 export interface KBFile {
   id: string;
   fileName: string;