Stelliberty 2.0.0-beta4

• System proxy and TUN switches now update immediately while their changes continue in the background.
• The home page subscription metadata now aligns more consistently.
• The outbound mode card now uses concise strategy descriptions instead of repeating the selected mode.
• macOS now keeps the native window controls without also showing the custom controls.

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• 系统代理和 TUN 开关现在会立即更新状态，实际变更在后台继续执行。
• 主页订阅信息的更新时间和到期时间对齐更一致。
• 出站模式卡片现在改用简短策略说明，不再重复显示当前模式。
• macOS 现在保留系统标题栏按钮，不再同时显示自绘窗口控制。