[TobiasRoeddiger]

Phone microphone recordings become silent after Home or screen lock even though Recorder still shows an active session. record 7 removed its Android background service.

Keep a microphone foreground service active during actual audio recording. Wait for service startup before capture; remove it on stop, startup failure, or activity destruction. Sensor-only sessions and microphone monitoring do not start the service.

Validation:

• Real Pixel 9a, paired earphones, music and all 16 sensor channels: the previous build saved 25 seconds of complete silence while locked; the patched build saved continuous nonzero audio through background, lock and resume.
• 135,441 saved sensor rows remain finite and strictly increasing, with the expected rates throughout. No playback underruns during the measured lifecycle window.
• Service is absent after stopping and during a sensor-only recording, which produces only the 16 CSV files.
• All 129 Flutter tests, analysis and Android release build pass.

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Visit the preview URL for this PR (updated for commit 2352d8d):

https://open-earable-web--pr334-codex-android-backgr-d0vzxsh3.web.app

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PR Build Artifacts

• Android APK: Download Android APK
• Linux Bundle: Download Linux Bundle
• Windows Runner: Download Windows Runner
• Web Bundle: Download Web Bundle

Full workflow run: https://github.com/OpenEarable/app/actions/runs/37286128811