Initial commit: AI Radio Show web application

- FastAPI backend with multiple TTS providers (Inworld, ElevenLabs, Kokoro, F5-TTS, etc.)
- Web frontend with caller management, music, and soundboard
- Whisper transcription integration
- OpenRouter/Ollama LLM support
- Castopod podcast publishing script

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

audio_settings.json

@@ -0,0 +1,9 @@
+{
+  "input_device": 13,
+  "input_channel": 1,
+  "output_device": 13,
+  "caller_channel": 3,
+  "music_channel": 5,
+  "sfx_channel": 7,
+  "phone_filter": false
+}