Use Windows system TTS for local mode

src/discord-main.ts

@@ -18,6 +18,7 @@ import { Logger } from "./logger.js";
 import { LocalFasterWhisperSttService } from "./services/local-stt.js";
 import { LocalKokoroTtsService } from "./services/local-tts.js";
 import { OllamaLlmService } from "./services/ollama-llm.js";
+import { WindowsSystemTtsService } from "./services/windows-system-tts.js";
 
 export async function runDiscordBot(config: DiscordRuntimeConfig, logger: Logger): Promise<void> {
   const commands = [
@@ -38,7 +39,10 @@ export async function runDiscordBot(config: DiscordRuntimeConfig, logger: Logger
   });
 
   const stt = new LocalFasterWhisperSttService(config, logger);
-  const tts = new LocalKokoroTtsService(config, logger);
+  const tts =
+    process.platform === "win32"
+      ? new WindowsSystemTtsService(config.LOCAL_TTS_SPEED)
+      : new LocalKokoroTtsService(config, logger);
   const llm = new OllamaLlmService(config);
   const sessions = new Map<string, GuildVoiceSession>();