[aaroncheungzy]

Summary

With tray quick connect enabled, a single click now connects the selected device when disconnected and opens battery information when already connected. A successful connection automatically opens battery information, without an additional "Connected" notification.

• replace Windows system notifications with a reusable application popup styled consistently with the battery window
• retain in-app connection progress and error feedback; dismiss the popup when the battery window opens
• handle single clicks immediately and remove the dedicated double-click action
• update the setting description and all existing translation catalogs
• add regression coverage for tray activation, connection outcomes, popup rendering, and the translated setting description

When quick connect is disabled, a single click continues to open the battery window. Right-click menu behavior is unchanged. No new dependencies or configuration keys are introduced.

Validation

• Manually tested on Windows 10 with AirPods 4 with Active Noise Cancellation.
• Local x64 RelWithDebInfo build passed with Qt 6.8.3 and MSVC 19.51 (Visual Studio 2026 Build Tools).
• ctest --test-dir Build -C RelWithDebInfo --output-on-failure: 12/12 tests passed.
• C++ formatting and git diff --check passed.

Screenshots

The following screenshots are captured by the local UI tests.

Light popup	Dark popup