Fix clippy

src/file_editor.rs

@@ -76,13 +76,13 @@ enum FileEvent {
 
 #[derive(serde::Deserialize, serde::Serialize)]
 pub enum BufferItem {
-    Text(MdTextEdit),
+    Text(Box<MdTextEdit>),
     Handwriting(Box<Handwriting>),
 }
 
 impl FileEditor {
     pub fn new(title: impl Into<String>) -> Self {
-        let buffer = vec![BufferItem::Text(MdTextEdit::new())];
+        let buffer = vec![BufferItem::Text(Box::new(MdTextEdit::new()))];
         Self {
             title: title.into(),
             path: None,
@@ -404,7 +404,7 @@ impl From<&str> for FileEditor {
             _ => {
                 let mut text_edit = MdTextEdit::new();
                 text_edit.text.push_str(text);
-                buffer.push(BufferItem::Text(text_edit));
+                buffer.push(BufferItem::Text(Box::new(text_edit)));
             }
         };