게시물 라이브 편집 블록 동작 개선

components/content/ContentMarkdownCodeBlockEditor.vue

@@ -156,7 +156,9 @@ const toggleLineNumbers = () => {
       block-class="content-markdown-code-block-editor__editor m-0 min-w-0 border-0 bg-transparent p-0 font-mono text-sm leading-6 text-white outline-none"
       enter-mode="multiline"
       plain-text
+      arrow-exit-creates-line
       :source-line="bodySourceLine"
+      :source-line-count="bodyLines.length"
       :model-value="modelValue"
       @input="onBodyInput"
       @commit="onBodyCommit"