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/services/AudioCaptureService.ts

@@ -3,11 +3,14 @@
 // node-record-lpcm16 + SoX로 PCM16 16kHz mono 캡처.
 
 import { EventEmitter } from 'events'
+import path from 'path'
+import { existsSync } from 'fs'
 import { record } from 'node-record-lpcm16'
 import type { Recording } from 'node-record-lpcm16'
 import type { Readable } from 'stream'
 import { getLogger } from './LoggerService'
 import { configGet } from './ConfigService'
+import { getSoxPath } from '../utils/paths'
 import type { AudioDevice } from '@shared/types'
 import { AUDIO_FORMAT, TIMING } from '@shared/constants'
 import { D3ROError, ErrorCode } from '@shared/errors'
@@ -93,7 +96,17 @@ class AudioCaptureService extends EventEmitter {
           `format: ${AUDIO_FORMAT.SAMPLE_RATE}Hz ${AUDIO_FORMAT.CHANNELS}ch ${AUDIO_FORMAT.BIT_DEPTH}bit)`
       )
 
-      // node-record-lpcm16 으로 SoX rec 프로세스 spawn
+      // node-record-lpcm16은 'sox' 명령어를 PATH에서 찾으므로,
+      // 번들된 SoX 디렉토리를 PATH 앞에 추가한다.
+      const soxExe = getSoxPath()
+      const soxDir = path.dirname(soxExe)
+      if (existsSync(soxExe) && soxExe !== 'sox') {
+        const sep = process.platform === 'win32' ? ';' : ':'
+        process.env.PATH = soxDir + sep + (process.env.PATH ?? '')
+        logger.info(`Bundled SoX added to PATH: ${soxDir}`)
+      }
+      logger.info(`Using SoX: ${soxExe}`)
+
       const recordingOptions: Record<string, unknown> = {
         sampleRate: AUDIO_FORMAT.SAMPLE_RATE,
         channels: AUDIO_FORMAT.CHANNELS,