修复Markdown导入和编辑器初始化问题

- 修复编辑器初始化时自动保存导致内容被破坏的问题
  - 将 allowOnUpdateRef 初始值从 true 改为 false
  - 避免编辑器加载内容时立即触发保存

- 移除编辑器内容更新时的 cleanupAccidentalStandaloneInlineCode 调用
  - 直接使用原始内容，避免误删正常的代码块

- 改进Markdown导入逻辑
  - 使用 importMarkdown 字段而非 content 字段
  - 让服务器端正确转换Markdown为HTML
  - 支持ZIP文件中的Markdown导入

- 新增导入后自动打开文档功能
  - 导入单个文件后自动打开该文档
  - 左侧文档树自动定位到导入的文档

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/editor.tsx

@@ -619,7 +619,7 @@ export function Editor({ content, onChange, onEditorReady, onToggleAI, onExport,
     }>({ sourceStartIndex: -1, sourceEndIndex: -1, targetInsertionIndex: -1 });
     const activeBlockIndexRef = useRef<number | null>(null);
     const suppressNextUpdateRef = useRef(false);
-    const allowOnUpdateRef = useRef(true);
+    const allowOnUpdateRef = useRef(false);
     const { fontFamily, fontSize, lineHeight, tableLineHeight } = useSettingsStore();
 
     const editor = useEditor({
@@ -906,15 +906,12 @@ export function Editor({ content, onChange, onEditorReady, onToggleAI, onExport,
 
     useEffect(() => {
         if (editor && content !== editor.getHTML()) {
-            const normalizedContent = cleanupAccidentalStandaloneInlineCode(content);
+            // 不再调用 cleanupAccidentalStandaloneInlineCode，直接使用原始内容
             suppressNextUpdateRef.current = true;
             allowOnUpdateRef.current = false;
             queueMicrotask(() => {
-                editor.commands.setContent(normalizedContent);
+                editor.commands.setContent(content);
             });
-            if (normalizedContent !== content) {
-                onChange(normalizedContent);
-            }
         }
         if (editor && onEditorReady) {
             onEditorReady(editor);

src/components/import-context.tsx

@@ -26,7 +26,7 @@ export function ImportProvider({ children }: { children: React.ReactNode }) {
     const [isImporting, setIsImporting] = useState(false);
     const fileInputRef = useRef<HTMLInputElement>(null);
     const targetParentIdRef = useRef<string | null>(null);
-    const { pages, fetchPages } = useEditorStore();
+    const { pages, fetchPages, setActivePageId } = useEditorStore();
 
     const postPage = useCallback(
         async (
@@ -110,11 +110,12 @@ export function ImportProvider({ children }: { children: React.ReactNode }) {
         if (!file) return;
 
         setIsImporting(true);
+        let importedPageId: string | null = null;
         try {
             if (file.name.toLowerCase().endsWith(".zip")) {
                 await handleZipImport(file);
             } else {
-                await handleSingleFileImport(file);
+                importedPageId = await handleSingleFileImport(file);
             }
         } catch (error) {
             console.error("Import failed", error);
@@ -122,39 +123,45 @@ export function ImportProvider({ children }: { children: React.ReactNode }) {
             alert(message);
         } finally {
             setIsImporting(false);
-            fetchPages();
+            await fetchPages();
+            // 导入单个文件后，自动打开该文档
+            if (importedPageId) {
+                setActivePageId(importedPageId);
+            }
         }
     };
 
-    const handleSingleFileImport = async (file: File) => {
+    const handleSingleFileImport = async (file: File): Promise<string> => {
         const text = await file.text();
         const title = file.name.replace(/\.md$/i, "");
-        // 直接存储原始 Markdown，tiptap-markdown 扩展会在编辑器加载时自动解析
+        // 使用 importMarkdown 字段，让服务器转换为 HTML
         const parentId = targetParentIdRef.current;
         const existing = pages.find((p) => p.type === "file" && p.parentId === parentId && (p.title || "").trim() === title.trim());
+
         if (existing) {
             await putPage(
                 existing.id,
                 {
                     title,
-                    content: text,
+                    importMarkdown: text,
                     parentId,
                     type: "file",
                 },
                 "更新导入文件"
             );
-            return;
+            return existing.id;
         }
 
-        await postPage(
+        const result = await postPage(
             {
                 title,
-                content: text,
+                importMarkdown: text,
                 parentId,
                 type: "file",
             },
             "创建导入文件"
         );
+        return result.id;
     };
 
     const handleZipImport = async (file: File) => {
@@ -255,7 +262,7 @@ export function ImportProvider({ children }: { children: React.ReactNode }) {
                     existing.id,
                     {
                         title,
-                        content: markdown,
+                        importMarkdown: markdown,
                         parentId,
                         type: "file",
                     },
@@ -265,7 +272,7 @@ export function ImportProvider({ children }: { children: React.ReactNode }) {
                 await postPage(
                     {
                         title,
-                        content: markdown,
+                        importMarkdown: markdown,
                         parentId,
                         type: "file",
                     },