feat: complete release preparation, 10+ ad mediation, CI/CD, and docker deployment

apps/desktop/src/main/services/TTSPlaybackService.ts

@@ -26,7 +26,9 @@ class TTSPlaybackService extends EventEmitter {
    * 큐에 추가되어 순차 재생된다.
    */
   async speak(text: string): Promise<void> {
-    if (!text.trim()) return
+    if (!text.trim()) {
+      throw new D3ROError(ErrorCode.TTSTextEmpty, 'TTS text is empty')
+    }
     this._queue.push(text.trim())
     if (!this._speaking) {
       await this._processQueue()
@@ -205,6 +207,11 @@ class TTSPlaybackService extends EventEmitter {
 // ── 싱글톤 ──
 let instance: TTSPlaybackService | null = null
 
+export function resetTTSPlaybackServiceForTests(): void {
+  if (instance) instance.removeAllListeners()
+  instance = null
+}
+
 export function getTTSPlaybackService(): TTSPlaybackService {
   if (!instance) {
     instance = new TTSPlaybackService()