diff --git a/wolai-frontend/.gitignore b/wolai-frontend/.gitignore
index 2b84e14d..7583c207 100644
--- a/wolai-frontend/.gitignore
+++ b/wolai-frontend/.gitignore
@@ -43,4 +43,5 @@ next-env.d.ts
 #test
 **/test/
 pw-tests/**
-pw-tests/
\ No newline at end of file
+pw-tests/  
+wolai-frontend\public\documents
\ No newline at end of file
diff --git a/wolai-frontend/src/components/editor/blocks/MindmapBlock.tsx b/wolai-frontend/src/components/editor/blocks/MindmapBlock.tsx
index d7163c60..eff55715 100644
--- a/wolai-frontend/src/components/editor/blocks/MindmapBlock.tsx
+++ b/wolai-frontend/src/components/editor/blocks/MindmapBlock.tsx
@@ -331,22 +331,6 @@ const MindmapBlockView = ({
   }, 500);
 
   const initialSyncDone = useRef(false);
-  // 若渲染结束后激活列表被清空，定期兜底恢复根节点为选中，避免后续指令找不到父节点
-  useEffect(() => {
-    if (!mindmap) return;
-    const timer = window.setInterval(() => {
-      const renderer = mindmap.renderer;
-      if (!renderer) return;
-      if (!renderer.activeNodeList || renderer.activeNodeList.length === 0) {
-        const root = getRootNode(mindmap);
-        if (root && renderer.addNodeToActiveList) {
-          renderer.addNodeToActiveList(root, true);
-          renderer.emitNodeActiveEvent?.(root);
-        }
-      }
-    }, 200);
-    return () => window.clearInterval(timer);
-  }, [getRootNode, mindmap]);
   useEffect(() => {
     if (!docId || !mindmap || initialSyncDone.current) return;
     initialSyncDone.current = true;
@@ -757,17 +741,6 @@ const MindmapBlockView = ({
       window.setTimeout(() => runWhenReady(fn, retry + 1), 50);
     }
   };
-  const recenterIfNeeded = (mm?: MindMapInstance | null) => {
-    try {
-      const instance = mm ?? getInstanceCandidate();
-      const renderer = instance?.renderer;
-      const view = instance?.view;
-      renderer?.setRootNodeCenter && renderer.setRootNodeCenter();
-      view?.fit && view.fit();
-    } catch {
-      /* 空 */
-    }
-  };
   const execWithReflow = (runner: (mm: MindMapInstance) => void) => {
     const attempt = (retry = 0) => {
       const instance = getInstanceCandidate();
@@ -777,14 +750,6 @@ const MindmapBlockView = ({
       }
       const mm = ensureActiveBefore(instance);
       if (!mm) return;
-      try {
-        const renderer = mm.renderer as any;
-        if (renderer?.refresh) renderer.refresh();
-        if (renderer?.reRender) renderer.reRender();
-        recenterIfNeeded(mm);
-      } catch {
-        /* 空 */
-      }
       runner(mm);
     };
     attempt();
diff --git a/wolai-frontend/src/components/editor/blocks/MindmapCount.tsx b/wolai-frontend/src/components/editor/blocks/MindmapCount.tsx
index 00b9d0e8..c219c40e 100644
--- a/wolai-frontend/src/components/editor/blocks/MindmapCount.tsx
+++ b/wolai-frontend/src/components/editor/blocks/MindmapCount.tsx
@@ -13,28 +13,34 @@ export const MindmapCount = ({ mindmap }: CountProps) => {
 
     const calculateCounts = (data: any) => {
       let nodes = 0;
-      let textStr = "";
+      let words = 0;
+
+      const stripHtmlLen = (html: string) => {
+        // 简易去标签统计长度：避免每次 data_change 都创建 DOM 容器造成卡顿
+        const plain = html
+          .replace(/<[^>]*>/g, "")
+          .replace(/&nbsp;/g, " ")
+          .replace(/\s+/g, " ")
+          .trim();
+        return plain.length;
+      };
 
       const walk = (nodeData: any) => {
         if (!nodeData) return;
         nodes++;
-        // simple-mind-map node data structure: { data: { text: ... }, children: [...] }
+        // simple-mind-map 节点数据结构：{ data: { text: ... }, children: [...] }
         const text = String(nodeData.data?.text || "");
-        textStr += text;
-        
+        words += stripHtmlLen(text);
+
         if (nodeData.children && Array.isArray(nodeData.children)) {
           nodeData.children.forEach(walk);
         }
       };
 
-      walk(data);
+      const root = data?.root ?? data;
+      walk(root);
 
-      // Remove HTML tags for word count
-      const tempDiv = document.createElement("div");
-      tempDiv.innerHTML = textStr;
-      const words = tempDiv.textContent?.length || 0;
-
-      setCounts({ words, nodes });
+      setCounts((prev) => (prev.words === words && prev.nodes === nodes ? prev : { words, nodes }));
     };
 
     const onDataChange = (data: any) => {
@@ -42,14 +48,13 @@ export const MindmapCount = ({ mindmap }: CountProps) => {
     };
 
     mindmap.on("data_change", onDataChange);
-    
-    // Initial calculation if data is available
-    // mindmap.getData() might return full data object
+
+    // 初次渲染时尝试计算一次（mindmap.getData() 可能返回完整数据对象）
     try {
         const initialData = mindmap.getData();
         if (initialData) calculateCounts(initialData);
     } catch (e) {
-        console.warn("Failed to get initial mindmap data for count", e);
+        console.warn("获取思维导图初始数据用于统计失败", e);
     }
 
     return () => {
diff --git a/wolai-frontend/src/components/editor/blocks/MindmapToolbar.tsx b/wolai-frontend/src/components/editor/blocks/MindmapToolbar.tsx
index 45bbe485..80ea71d0 100644
--- a/wolai-frontend/src/components/editor/blocks/MindmapToolbar.tsx
+++ b/wolai-frontend/src/components/editor/blocks/MindmapToolbar.tsx
@@ -9,7 +9,6 @@ import {
 } from "./mindmapToolbarConfig";
 
 const stopEditorEvent = (e: React.SyntheticEvent) => {
-  e.preventDefault();
   e.stopPropagation();
 };