Replace generic system icons (info bubble, stock alarm clock) with a custom equalizer-bars vector drawable across all 4 notification builders: pre-notice, snooze countdown, ringing alarm, and the audio player. Apply the app's cyan brand color to the 3 alarm notifications that previously had none. Audio notification now explicitly declares its icon instead of falling back to the full-color launcher icon, which Android was auto-silhouetting into an illegible status-bar blob.