Allow reverting to previous Windows Desktop UI or add theme/layout settings

Description

The Claude Windows Desktop app recently updated its UI automatically, and the new layout/design is a significant departure from the previous version. There's no way to revert to the old UI or customize the appearance.

Request

Either:

1. Provide an option to revert to the previous Desktop UI — or at minimum allow users to choose between the old and new layouts
2. Add theme/layout customization settings — let users control the look and feel of the desktop app (compact vs expanded, color schemes, etc.)

Why this matters

• The UI changed without warning or opt-in — users had no choice
• Some users preferred the previous design and workflow
• Desktop apps should give users control over their workspace appearance
• No downgrade path exists since updates are pushed automatically

Environment

• Platform: Windows 11
• App: Claude Desktop (Windows)

Thanks!