🚧 Refactor markdown preview extension

frontend/src/views/editor/extensions/spellcheck/spellcheck.ts

@@ -0,0 +1,8 @@
+import type { Extension } from '@codemirror/state'
+import { EditorView } from '@codemirror/view'
+
+export const spellcheck = (): Extension => {
+  return EditorView.contentAttributes.of({
+    spellcheck: 'true',
+  })
+}