fix(knowledgeBase): improve navigation and folder tree refresh logic

- Add path comparison check in breadcrumb navigation to avoid unnecessary route changes when already on target page
- Implement delayed folder tree refresh with setTimeout to ensure state reset completes before refreshing
- Add manual table refresh trigger to ensure data updates after navigation
- Reset expanded keys in FolderTree component during load to ensure consistent state from root directory
- Add expanded keys reset in breadcrumb navigation to prevent stale expansion state
- Improve navigation state handling by using replace flag only when on target path to reduce history stack pollution

web/src/hooks/useBreadcrumbManager.ts

@@ -213,10 +213,23 @@ export const useBreadcrumbManager = (options?: BreadcrumbOptions) => {
               refresh: true, // 添加刷新标志
               timestamp: Date.now(), // 添加时间戳确保状态变化
             };
-            navigate(`/knowledge-base/${breadcrumbPath.knowledgeBase!.id}/private`, { 
-              state: navigationState,
-              replace: true // 使用 replace 避免历史记录堆积
-            });
+            
+            // 使用当前页面路径进行导航，避免不必要的路由变化
+            const currentPath = window.location.pathname;
+            const targetPath = `/knowledge-base/${breadcrumbPath.knowledgeBase!.id}/private`;
+            
+            if (currentPath === targetPath) {
+              // 如果已经在目标页面，直接更新状态而不导航
+              navigate(targetPath, { 
+                state: navigationState,
+                replace: true // 使用 replace 避免历史记录堆积
+              });
+            } else {
+              // 如果不在目标页面，正常导航
+              navigate(targetPath, { 
+                state: navigationState
+              });
+            }
             return false;
           },
         }] : []),

web/src/views/KnowledgeBase/[knowledgeBaseId]/Private.tsx

@@ -210,8 +210,15 @@ const Private: FC = () => {
       // 清除自动展开路径
       setAutoExpandPath([]);
       
-      // 刷新文件夹树（简单的刷新，不需要复杂的重置逻辑）
-      setFolderTreeRefreshKey((prev) => prev + 1);
+      // 刷新文件夹树 - 使用延迟确保状态重置完成后再刷新
+      setTimeout(() => {
+        setFolderTreeRefreshKey((prev) => prev + 1);
+      }, 100);
+      
+      // 手动触发表格刷新，确保数据更新
+      setTimeout(() => {
+        tableRef.current?.loadData();
+      }, 200);
       
       // 清除 state，避免重复处理
       navigate(location.pathname, { replace: true, state: {} });
@@ -584,6 +591,8 @@ const Private: FC = () => {
     await new Promise(resolve => setTimeout(resolve, 300));
      // 然后刷新文件夹树
     setFolderTreeRefreshKey((prev) => prev + 1);
+    
+    // 确保 folder 状态正确设置
     if (!folder) {
       setFolder({
         kb_id: knowledgeBaseId ?? '',

web/src/views/KnowledgeBase/components/FolderTree.tsx

@@ -309,9 +309,13 @@ const FolderTree: FC<FolderTreeProps> = ({
     const load = async () => {
       if (!knowledgeBaseId) {
         setTreeData([]);
+        setExpandedKeys([]); // 重置展开状态
         return;
       }
       try {
+        // 重置展开状态，确保从根目录开始
+        setExpandedKeys([]);
+        
         const nodes = await buildTreeNodes(knowledgeBaseId, knowledgeBaseId);
         if (!cancelled) {
           setTreeData(nodes);