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/LocalSTTService.ts

@@ -5,10 +5,9 @@
 
 import { EventEmitter } from 'events'
 import { type ChildProcess, spawn } from 'child_process'
-import path from 'path'
-import { app } from 'electron'
 import { getLogger } from './LoggerService'
 import { configGet } from './ConfigService'
+import { getSidecarCommand } from '../utils/paths'
 import { D3ROError, ErrorCode } from '@shared/errors'
 import type { STTModel, STTStatus, STTEngineState } from '@shared/types'
 
@@ -359,22 +358,16 @@ class LocalSTTService extends EventEmitter {
 
   // ── Sidecar 관리 ──
 
-  private _getSidecarPath(): string {
-    const basePath = app.isPackaged ? process.resourcesPath : app.getAppPath()
-    return path.join(basePath, 'sidecar', 'main.py')
-  }
-
   private async _spawnSidecar(): Promise<void> {
-    const sidecarPath = this._getSidecarPath()
-    logger.info(`Sidecar 시작: python ${sidecarPath} --port ${this._port}`)
+    const { command, args } = getSidecarCommand()
+    const fullArgs = [...args, '--port', String(this._port)]
+    logger.info(`Sidecar 시작: ${command} ${fullArgs.join(' ')}`)
 
     return new Promise<void>((resolve, reject) => {
-      const pythonCmd = process.platform === 'win32' ? 'python' : 'python3'
-
       try {
         this._sidecarProcess = spawn(
-          pythonCmd,
-          [sidecarPath, '--port', String(this._port)],
+          command,
+          fullArgs,
           {
             stdio: ['pipe', 'pipe', 'pipe'],
             env: { ...process.env },