Phase 7~8 구현: 테스트 + 빌드 + CI/CD + SoundEffect + AutoLaunch + UI 리디자인

- vitest 41개 단위 테스트 (HistoryService, DictionaryService, CustomInstructionService, VoiceModeService, D3ROError)
- electron-builder.yml (NSIS, asarUnpack, extraResources)
- .gitlab-ci.yml (lint, typecheck, test, build, release)
- SoundEffectService: WAV 프리로드 + PowerShell 재생 + VoiceMode 연동
- AutoLaunchService: app.setLoginItemSettings + ConfigService 동기화
- TextInsertService: 간이 삽입 검증 (EditMonitor 경량)
- 번들링 인프라: SoX 다운로드 스크립트, PyInstaller 빌드, 경로 해상도 유틸
- AudioCaptureService/LocalSTTService: 번들 경로 자동 감지
- 08-design-system.md 기반 MUI 테마 (다크+라이트+auto 테마 시스템)
- 전체 UI 컴포넌트 리디자인: AppLayout, Dashboard, StatusBar, History, Dictionary, Commands, Settings
- 효과음 WAV 생성: recording-start, recording-stop, error
- EPIPE 에러 핸들링 추가

src/main/ipc/system-handlers.ts

@@ -3,7 +3,8 @@
 import { ipcMain, app, systemPreferences } from 'electron'
 import { IPC_CHANNELS } from '@shared/ipc-channels'
 import { ipcSuccess } from '@shared/errors'
-import type { PermissionStatus } from '@shared/types'
+import type { PermissionStatus, PlaySoundParams, SetSoundEnabledParams } from '@shared/types'
+import { getSoundEffectService } from '../services/SoundEffectService'
 
 export function registerSystemHandlers(): void {
   ipcMain.handle(IPC_CHANNELS.SYSTEM.GET_PLATFORM, async () => {
@@ -25,4 +26,20 @@ export function registerSystemHandlers(): void {
     }
     return ipcSuccess(status)
   })
+
+  // ── Sound Effect ──
+
+  ipcMain.handle(IPC_CHANNELS.SYSTEM.PLAY_SOUND, async (_event, params: PlaySoundParams) => {
+    getSoundEffectService().play(params.sound as 'recording-start' | 'recording-stop' | 'error' | 'cancel')
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.SYSTEM.SET_SOUND_ENABLED, async (_event, params: SetSoundEnabledParams) => {
+    getSoundEffectService().setEnabled(params.enabled)
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.SYSTEM.IS_SOUND_ENABLED, async () => {
+    return ipcSuccess(getSoundEffectService().isEnabled())
+  })
 }