Remote Volume Controller v0.2.0

Stage 2 test build: Windows controls Android media volume.

• Windows shows the trusted Poco F5, confirmed Android media-volume step, slider, and mute state.
• Android receive mode is explicit opt-in and runs as a foreground service with a persistent notification and Stop action.
• Android reports actual volume after each command and pushes hardware-button changes to Windows.
• Optional receive-after-reboot is a separate setting.

Acceptance status: automated checks and Windows UI smoke passed. Stage 2 remains IN PROGRESS pending real Poco F5 / HyperOS verification of commands, hardware buttons, locked-screen and 30-minute foreground behavior, and Stop action.

Artifacts:

• RemoteVolumeController-Windows-v0.2.0-debug.exe — unsigned debug/test build
  SHA-256: 8fb221006373249f6c8d468413fbc1ea41051d6be9e04916b57dd9a5b9ab0062
• RemoteVolumeController-Android-v0.2.0-debug.apk — debug-signed arm64-v8a APK
  SHA-256: 639111c2fb5314ce014f536c4f55a2f566bab36263293fc37d32a09f47bff0af