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

apps/desktop/tests/red/tts.usecase.test.ts

@@ -0,0 +1,25 @@
+import { describe, it, expect } from 'vitest'
+import { ErrorCode } from '@d3ro/core/errors'
+import { getTTSPlaybackService } from '../../src/main/services/TTSPlaybackService'
+import { useRedHarness } from './harness'
+
+useRedHarness()
+
+describe('유스케이스: TTS 입력 가드 (네이티브 재생 전)', () => {
+  it('빈 텍스트는 TTSTextEmpty 다', async () => {
+    await expect(getTTSPlaybackService().speak('')).rejects.toMatchObject({
+      code: ErrorCode.TTSTextEmpty,
+    })
+  })
+
+  it('공백만 있는 텍스트도 TTSTextEmpty 다', async () => {
+    await expect(getTTSPlaybackService().speak('   \n')).rejects.toMatchObject({
+      code: ErrorCode.TTSTextEmpty,
+    })
+  })
+
+  it('stop 은 재생 중이 아니어도 안전하다', () => {
+    expect(() => getTTSPlaybackService().stop()).not.toThrow()
+    expect(getTTSPlaybackService().isSpeaking).toBe(false)
+  })
+})