Support for smaller screens

[Lampadina17]

My edits involve scaling and minimum window size, the edits are working as expected and looks good

[Lampadina17]

I added support for low resolution display and corrected my typo

[vicrodh]

Thanks for the contribution! A couple of notes:

Branch target

PRs should target pre-release, not main. The main branch is reserved for tagged releases only. Please check the contributing guidelines and retarget your PR to pre-release.

Small screen support

We've been thinking about better support for small screens, but the approach will likely be different from resizing the current desktop UI. Tauri relies on WebKitGTK which is too heavy for single-board computers like Raspberry Pi — the renderer alone can consume more RAM than the app, and GPU acceleration on ARM/Mesa is inconsistent.

New layouts for smaller screens are on the roadmap. For devices like RPi, the better path is a lightweight client that connects to QBZ's existing Remote Control API (REST + SSE + WebSocket) rather than running the full desktop app. This way the heavy lifting stays on the desktop and the small device just needs a browser.