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

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/application/KnowledgeBaseService.java

@@ -140,17 +140,6 @@ public class KnowledgeBaseService {
         return PagedResponse.of(respList, page.getCurrent(), page.getTotal(), page.getPages());
     }
 
-    public KnowledgeBaseStatisticsResp getStatistics() {
-        KnowledgeBaseStatisticsResp resp = new KnowledgeBaseStatisticsResp();
-        resp.setTotalKnowledgeBases(knowledgeBaseRepository.count());
-
-        RagFileStatistics fileStatistics = ragFileRepository.getStatistics();
-        if (fileStatistics != null) {
-            resp.setTotalFiles(fileStatistics.getTotalFiles() != null ? fileStatistics.getTotalFiles() : 0L);
-            resp.setTotalSize(fileStatistics.getTotalSize() != null ? fileStatistics.getTotalSize() : 0L);
-        }
-        return resp;
-    }
 
     @Transactional(rollbackFor = Exception.class)
     public void addFiles(AddFilesReq request) {

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/domain/repository/RagFileRepository.java

@@ -5,7 +5,6 @@ import com.baomidou.mybatisplus.extension.repository.IRepository;
 import com.datamate.rag.indexer.domain.model.RagFile;
 import com.datamate.rag.indexer.interfaces.dto.KnowledgeBaseFileSearchReq;
 import com.datamate.rag.indexer.interfaces.dto.RagFileReq;
-import com.datamate.rag.indexer.interfaces.dto.RagFileStatistics;
 
 import java.util.List;
 
@@ -25,6 +24,4 @@ public interface RagFileRepository extends IRepository<RagFile> {
     IPage<RagFile> page(IPage<RagFile> page, RagFileReq request);
 
     IPage<RagFile> searchPage(IPage<RagFile> page, KnowledgeBaseFileSearchReq request);
-
-    RagFileStatistics getStatistics();
 }

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/infrastructure/persistence/impl/RagFileRepositoryImpl.java

@@ -8,7 +8,6 @@ import com.datamate.rag.indexer.domain.repository.RagFileRepository;
 import com.datamate.rag.indexer.infrastructure.persistence.mapper.RagFileMapper;
 import com.datamate.rag.indexer.interfaces.dto.KnowledgeBaseFileSearchReq;
 import com.datamate.rag.indexer.interfaces.dto.RagFileReq;
-import com.datamate.rag.indexer.interfaces.dto.RagFileStatistics;
 import org.springframework.stereotype.Repository;
 import org.springframework.util.StringUtils;
 
@@ -61,11 +60,6 @@ public class RagFileRepositoryImpl extends CrudRepository<RagFileMapper, RagFile
                 .page(page);
     }
 
-    @Override
-    public RagFileStatistics getStatistics() {
-        return baseMapper.getStatistics();
-    }
-
     private String normalizeRelativePath(String relativePath) {
         if (!StringUtils.hasText(relativePath)) {
             return "";

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/infrastructure/persistence/mapper/RagFileMapper.java

@@ -3,9 +3,7 @@ package com.datamate.rag.indexer.infrastructure.persistence.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.datamate.rag.indexer.domain.model.RagFile;
-import com.datamate.rag.indexer.interfaces.dto.RagFileStatistics;
 import org.apache.ibatis.annotations.Mapper;
-import org.apache.ibatis.annotations.Select;
 
 /**
  * RAG文件映射器接口
@@ -15,9 +13,4 @@ import org.apache.ibatis.annotations.Select;
  */
 @Mapper
 public interface RagFileMapper extends BaseMapper<RagFile> {
-    @Select("SELECT COUNT(*) AS totalFiles, " +
-        "COALESCE(SUM(df.file_size), 0) AS totalSize " +
-        "FROM t_rag_file rf " +
-        "LEFT JOIN t_dm_dataset_files df ON rf.file_id = df.id")
-    RagFileStatistics getStatistics();
 }

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/KnowledgeBaseController.java

@@ -80,15 +80,6 @@ public class KnowledgeBaseController {
         return knowledgeBaseService.list(request);
     }
 
-    /**
-     * 获取知识库统计信息
-     *
-     * @return 知识库统计信息
-     */
-    @GetMapping("/statistics")
-    public KnowledgeBaseStatisticsResp statistics() {
-        return knowledgeBaseService.getStatistics();
-    }
 
     /**
      * 添加文件到知识库

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/KnowledgeBaseStatisticsResp.java

@@ -1,15 +0,0 @@
-package com.datamate.rag.indexer.interfaces.dto;
-
-import lombok.Getter;
-import lombok.Setter;
-
-/**
- * 知识库统计响应
- */
-@Getter
-@Setter
-public class KnowledgeBaseStatisticsResp {
-    private Long totalKnowledgeBases = 0L;
-    private Long totalFiles = 0L;
-    private Long totalSize = 0L;
-}

backend/services/rag-indexer-service/src/main/java/com/datamate/rag/indexer/interfaces/dto/RagFileStatistics.java

@@ -1,14 +0,0 @@
-package com.datamate.rag.indexer.interfaces.dto;
-
-import lombok.Getter;
-import lombok.Setter;
-
-/**
- * 知识库文件统计
- */
-@Getter
-@Setter
-public class RagFileStatistics {
-    private Long totalFiles = 0L;
-    private Long totalSize = 0L;
-}