The i2s_audio media_player platform was removed; rebuild the audio
pipeline like mcu-echo.yaml with an i2s_audio speaker feeding a
mixer, so media playback, TTS announcements, and rtttl beeps all
share the one physical DAC output without conflicting. Also uses
format: NONE instead of the deprecated codec_support_enabled.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Bulk cleanup: remove trailing whitespace and ensure files end with a
newline. Structural issues (indentation, bracket spacing) left for
per-file fixes.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
randy
