라이브 코드 블록 패널 상태 수정

components/admin/AdminMarkdownEditor.vue

@@ -1980,6 +1980,9 @@ const onPreviewInsertAfterLine = ({ afterLine, lines, focusLine }) => {
   ].join('\n')
 
   activeLogicalLineIndex.value = nextFocusLine
+  isBlockPanelEngaged.value = false
+  lastStableBlockContext.value = null
+  syncBlockPanelState()
 
   nextTick(() => {
     previewRendererRef.value?.focusEditableAtLine(nextFocusLine, 0, 'start')