* ✨ feat(desktop): Linux window specialization
- Add minimize/maximize/close buttons for Linux (WinControl)
- Linux: no tray, close main window quits app
- Linux: native window shadow and opaque background
- i18n for window control tooltips
Made-with: Cursor
* 🌐 i18n: add window control translations for all locales
Made-with: Cursor
* 🐛 fix(desktop): show WinControl in SimpleTitleBar only on Linux
Made-with: Cursor
* 🐛 fix(desktop): limit custom titlebar controls to Linux
Avoid rendering duplicate window controls on Windows and keep the Linux maximize button in sync with the current window state.
Made-with: Cursor
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Co-authored-by: LiJian <onlyyoulove3@gmail.com>
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