fix(tray): left-click tray icon opens main window directly on Windows

[MarkSunDev]

Problem

On Windows, left-clicking the system tray icon shows the context menu — same behavior as right-click. To open the main window, users must click the tray icon and then click "Open main window" from the menu, which is an unnecessary extra step.

Solution

• Set show_menu_on_left_click(false) to disable menu popup on left-click
• Handle MouseButton::Left + MouseButtonState::Up in on_tray_icon_event to show and focus the main window directly
• Right-click behavior (context menu) remains unchanged

Testing

• Left-click tray icon → main window shows and receives focus
• Right-click tray icon → context menu opens as before
• "Open main window" menu item still works correctly
• macOS and Linux behavior unaffected (set_skip_taskbar is #[cfg(target_os = "windows")])

[farion1231]

@codex

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Gate left-click tray behavior to Windows only

This change makes show_menu_on_left_click(false) unconditional, so macOS/Linux also lose the previous left-click menu behavior and are routed through the new click handler. That is a cross-platform regression: on macOS, left-click now bypasses the existing show_main menu path in tray::handle_tray_menu_event that restores normal app visibility policy (apply_tray_policy(app, true)), so users coming from tray/accessory mode can get inconsistent activation/dock behavior. Scope this override to Windows (or keep left-click menu enabled on non-Windows) to preserve prior behavior.

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