[History Viewer] Fields not expandible for json objects

[mting314]

Can't expand json type fields in the history viewer, which means changes to long fields (like artist) aren't fully visible

Repro steps

1. cd tools/data-viewer
2. bun install
3. bun run dev
4. Navigate to http://localhost:3001/?file=character-info.json
5. Click "history" in top navbar from character-info
6. Choose a commit that has outdated artist information and "compare with current"
7. Observe changed blocks are too small to display full artist info