popstas / talks-reducer / 28335011579

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feat: Add mp3 audio-only option to the codec selector (#142)

* task: add mp3 codec selector option task

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* add plan: mp3-codec-option

* feat: Add .mp3 output filename for mp3 codec

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Add audio-only ffmpeg command builder for mp3 codec

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Branch pipeline to audio-only render for mp3 codec

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Add mp3 video-codec choice to CLI

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Add mp3 codec option to desktop GUI selector

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Add mp3 codec choice to server and remote client

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Verify mp3 codec acceptance criteria across all surfaces

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat: Document mp3 audio-only video-codec option

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(review): suppress mp3 video preview, close test/doc gaps

- server: do not feed audio-only .mp3 output into the gr.Video preview
  component (it cannot render an audio stream); leave the preview empty and
  rely on the download slot.
- README: list --video-codec mp3 in the service_client CLI options.
- tests: cover the primary mp3 path (processed audioNew.wav with non-neutral
  speeds), assert trim forwarding to build_audio_only_command, verify server
  emits a .mp3 download with a suppressed video slot, and drop a brittle
  redundant assertion in test_ffmpeg.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix: preserve mp3 codec in GUI remote processing path

The codec guard set in gui/remote.py omitted "mp3", so selecting mp3
in the ... (continued)

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