Weixin platform now implements core.AudioSender interface, enabling TTS
audio output for WeChat personal chat via ilink API.
- Added ConvertAudioToAMR in core/speech.go for audio conversion
- Implemented SendAudio in platform/weixin/media_outbound.go
- Converts WAV/MP3/TTS output to AMR format (Weixin voice codec)
- Uploads via CDN and sends as voice message type
Fixes#587: TTS audio was generated but silently dropped because
weixin did not implement AudioSender interface.
Test plan:
- go build ./... passes
- go test ./... passes
- Unit tests for SendAudio edge cases (empty audio, invalid context)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Claude
b7fbc78dd1