feat(rag): 添加相对路径搜索功能并优化文件显示

- 在RagFileRepositoryImpl中新增relativePath字段和路径模式构建方法
- 实现buildRelativePathPattern方法用于构建相对路径搜索模式
- 修改page方法添加相对路径模糊查询支持
- 在RagFileReq DTO中添加relativePath参数字段
- 优化KnowledgeBaseDetail页面中的文件名显示逻辑
- 添加normalizePath函数处理文件路径规范化显示

frontend/src/pages/KnowledgeBase/Detail/KnowledgeBaseDetail.tsx

@@ -124,10 +124,14 @@ const KnowledgeBaseDetailPage: React.FC = () => {
       const pageSize = 200;
       let page = 0;
       let combined: KBFile[] = [];
+      const currentPrefix = normalizePrefix(filePrefix);
+      const keyword = fileKeyword.trim();
       while (true) {
         const { data } = await queryKnowledgeBaseFilesUsingGet(id, {
           page,
           size: pageSize,
+          ...(currentPrefix ? { relativePath: currentPrefix } : {}),
+          ...(keyword ? { fileName: keyword } : {}),
         });
         const content = Array.isArray(data?.content) ? data.content : [];
         combined = combined.concat(content.map(mapFileData));
@@ -146,14 +150,19 @@ const KnowledgeBaseDetailPage: React.FC = () => {
     } finally {
       setFilesLoading(false);
     }
-  }, [id, message]);
+  }, [id, filePrefix, fileKeyword, message]);
 
   useEffect(() => {
     if (id) {
       fetchKnowledgeBaseDetails(id);
+    }
+  }, [id, fetchKnowledgeBaseDetails]);
+
+  useEffect(() => {
+    if (id) {
       fetchFiles();
     }
-  }, [id, fetchKnowledgeBaseDetails, fetchFiles]);
+  }, [id, fetchFiles]);
 
   // File table logic
   const handleDeleteFile = async (file: KBFileRow) => {
@@ -257,8 +266,7 @@ const KnowledgeBaseDetailPage: React.FC = () => {
   const normalizedPrefix = useMemo(() => normalizePrefix(filePrefix), [filePrefix]);
 
   const { rows: fileRows, total: fileTotal } = useMemo(() => {
-    const keyword = fileKeyword.trim().toLowerCase();
-    const folderMap = new Map<string, { name: string; fileCount: number; hasMatch: boolean }>();
+    const folderMap = new Map<string, { name: string; fileCount: number }>();
     const fileItems: KBFileRow[] = [];
 
     allFiles.forEach((file) => {
@@ -271,31 +279,22 @@ const KnowledgeBaseDetailPage: React.FC = () => {
         return;
       }
       const leafName = segments[0];
-      const fileMatches =
-        !keyword ||
-        leafName.toLowerCase().includes(keyword) ||
-        fullPath.toLowerCase().includes(keyword);
 
       if (segments.length > 1) {
         const folderName = leafName;
         const entry = folderMap.get(folderName) || {
           name: folderName,
           fileCount: 0,
-          hasMatch: false,
         };
         entry.fileCount += 1;
-        if (fileMatches) {
-          entry.hasMatch = true;
-        }
         folderMap.set(folderName, entry);
         return;
       }
 
-      if (!fileMatches) {
-        return;
-      }
-
-      const displayName = file.fileName || leafName;
+      const normalizedFileName = normalizePath(file.fileName);
+      const displayName = normalizedFileName.includes(PATH_SEPARATOR)
+        ? leafName
+        : file.fileName || leafName;
       fileItems.push({
         ...file,
         name: displayName,
@@ -304,17 +303,8 @@ const KnowledgeBaseDetailPage: React.FC = () => {
       });
     });
 
-    const folderItems: KBFileRow[] = Array.from(folderMap.values())
-      .filter((entry) => {
-        if (!keyword) {
-          return true;
-        }
-        return (
-          entry.hasMatch ||
-          entry.name.toLowerCase().includes(keyword)
-        );
-      })
-      .map((entry) =>
+    const folderItems: KBFileRow[] = Array.from(folderMap.values()).map(
+      (entry) =>
         ({
           id: `directory-${normalizedPrefix}${entry.name}`,
           fileName: entry.name,
@@ -333,7 +323,7 @@ const KnowledgeBaseDetailPage: React.FC = () => {
           fullPath: `${normalizedPrefix}${entry.name}/`,
           fileCount: entry.fileCount,
         }) as KBFileRow
-      );
+    );
 
     const sortByName = (a: KBFileRow, b: KBFileRow) =>
       (a.displayName || a.name || "").localeCompare(
@@ -346,7 +336,7 @@ const KnowledgeBaseDetailPage: React.FC = () => {
 
     const combined = [...folderItems, ...fileItems];
     return { rows: combined, total: combined.length };
-  }, [allFiles, fileKeyword, knowledgeBase?.id, normalizedPrefix]);
+  }, [allFiles, knowledgeBase?.id, normalizedPrefix]);
 
   const filePageCurrent = filePagination.current;
   const filePageSize = filePagination.pageSize;