[Feature Request] Adjustable font/text size in Buzz Desktop (Linux)

Running Buzz Desktop on Linux (Ubuntu, Tauri build) — there doesn't appear to be a way to adjust the base font/text size in the chat view. Searched existing issues for "font size", "zoom", "text size", and "accessibility" and didn't find an existing request.

This would help readability, especially on high-DPI or unusually-scaled Linux displays where the default size doesn't always match the host desktop environment's own scaling setting.

Requesting a font-size preference (or standard zoom in/out, e.g. Ctrl+/Ctrl-) in Settings, similar to what most Electron/Tauri chat apps offer.