fix: resolve architecture disconnects and codebase weaknesses

- Add TEXT_CHANNEL_ID and TEXT_GUILD_ID to config schema (fix silent channel monitoring)
- Remove dead files: message-capture/broadcaster.ts, voice-recording/index.ts
- Fix WebSocket voice_command payload to forward from frontend
- Implement moderation:action handler in commandHandler
- Fix useMascotChat to use canonical request() wrapper
- Fix useAudioPlayback userId hash collision (use string not parseInt)
- Add catch blocks to useMediaControl.skip/stop
- Add typed broadcast functions (messageAnalyzed, voicePcmData, voiceActiveUser)
- Apply Biome formatting and lint fixes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/discord-gateway/src/modules/voice-recording/index.ts

@@ -1,5 +0,0 @@
-export { OpusDecoder } from "./recorder/decoder.js";
-export { SegmentManager } from "./recorder/segment.js";
-export { startRecording, stopRecording } from "./recorder.js";
-export { voiceTransmitter } from "./transmitter.js";
-export { VoiceController } from "./voiceController.js";