[FEATURE] Add fullscreen mode to desktop app (F11)

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want the desktop app to occupy the whole available screen space. The screen space on a laptop is limited, especially if you have problems with your vision and increase the font size.

Proposed Solution

Fullscreen mode (F11) which removes removing the title and the taskbar. Like nearly all modern apps do, including ChatGPT. Claude Code doesn't.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Other

Use Case Example

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Additional Context

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