fbf47e9ff6
When bot is in a Discord voice channel, both base auto-TTS and Discord play_tts override skip audio. The skip_double guard was also blocking the runner's _send_voice_reply, resulting in zero audio output in VC. Now skip_double is overridden when the bot is actively connected to a voice channel, allowing play_in_voice_channel to handle TTS. Add comprehensive test matrix covering all platform x input x mode combinations with full decision table documentation.