✨ Added cursor protection extension

frontend/src/views/editor/extensions/codeblock/index.ts

@@ -25,6 +25,7 @@ import {getCodeBlockLanguageExtension} from './lang-parser';
 import {createLanguageDetection} from './lang-detect';
 import {SupportedLanguage} from './types';
 import {getMathBlockExtensions} from './mathBlock';
+import {createCursorProtection} from './cursorProtection';
 
 /**
  * 代码块扩展配置选项
@@ -108,6 +109,9 @@ export function createCodeBlockExtension(options: CodeBlockOptions = {}): Extens
             showBackground
         }),
 
+        // 光标保护（防止方向键移动到分隔符上）
+        createCursorProtection(),
+
         // 块选择功能
         ...getBlockSelectExtensions(),
 
@@ -207,6 +211,11 @@ export {
     getMathBlockExtensions
 } from './mathBlock';
 
+// 光标保护功能
+export {
+    createCursorProtection
+} from './cursorProtection';
+
 /**
  * 默认导出
  */