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>

packages/shared/src/config/index.ts

@@ -16,6 +16,8 @@ export const configSchema = z
       .min(1, "DISCORD_TOKEN is required")
       .transform((value) => value.replace(/^("|')|(?:("|'))$/g, "")),
     MONITOR_GUILD_ID: z.string().min(1).optional(),
+    TEXT_GUILD_ID: z.string().min(1).optional(),
+    TEXT_CHANNEL_ID: z.string().min(1).optional(),
 
     // ── Legacy voice ─────────────────────────────────────────────────────
     VOICE_GUILD_ID: z.string().min(1).optional(),
@@ -231,7 +233,7 @@ export function loadConfig(env: NodeJS.ProcessEnv = process.env): AppConfig {
     const parsed = configSchema.parse(env);
     return {
       ...parsed,
-      EFFECTIVE_TEXT_GUILD_ID: parsed.MONITOR_GUILD_ID,
+      EFFECTIVE_TEXT_GUILD_ID: parsed.TEXT_GUILD_ID ?? parsed.MONITOR_GUILD_ID,
       EFFECTIVE_VOICE_GUILD_ID: parsed.VOICE_GUILD_ID,
     };
   } catch (error) {