This PR introduces new window behaviors, which can be enabled when the
menubar setting is active:
New Features:
- Quick open from tray icon
- Minimize to tray
- Exit to tray
- Start minimized
These changes have not yet been tested on macOS.
<img width="645" height="479" alt="image"
src="https://github.com/user-attachments/assets/7bdd13d0-5322-45a4-8e71-85c081aa0c86"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Configurable menubar/tray behaviors: open on left-click, minimize to
tray, close to tray (exit to tray), and start minimized.
* **UI**
* Appearance settings add a Menubar → Window Behavior group with four
toggles; group shows only when menubar/tray is enabled (hidden on
macOS).
* **Settings**
* Tray settings persisted and exposed via the settings API with getters
and setters for each option.
* **Localization**
* Added translation keys and English strings for the new controls and
descriptions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Peng Xiao <pengxiao@outlook.com>
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