Invisibles are copied with text

## What Happened

This is a minor issue, but when you copy and paste text in Code, the invisible markers (spaces, tabs, newlines) come with it. The pasted text displays invisibles, even though it's not selected.

If I select and deselect the pasted text, the invisibles disappear as expected.

## Expected Behavior

Invisibles should not be pasted with the rest of the text, but instead should only be shown when selected like all other text

## Steps to Reproduce

1. Enter some text containing spaces (like `Hello World`)
2. Select that text. You'll see an invisible marker in the space between words when it's selected.
2. Copy that text
3. Paste it somewhere else in Code. You will see the invisible marker in the pasted text, even though it's not selected

### Logs

## Platform Information

Odin daily

非表示マーカーを有効にした状態でCodeでコピーと貼り付けの手順を再現し、その後エディターのコピーと貼り付けの動作を追跡して、選択時にのみ適用される表示状態がどこに保持されているかを見つけます。貼り付けたテキストが選択されている場合にのみ非表示文字を表示し、元のテキストの既存の動作と一致すれば完了です。

索引モデルが issue の本文から書いたものです。