Phase 1+2 구현: Electron 뼈대 + STT/핫키/오케스트레이터

Phase 1:
- 프로젝트 초기화 (TypeScript strict, electron-vite, ESLint, Prettier)
- shared 타입 (ipc-channels 113채널, types, errors, constants)
- 메인 프로세스 뼈대 (bootstrap, lifecycle, 단일 인스턴스)
- LoggerService, ConfigService (electron-store ESM dynamic import)
- React 19 + MUI 7 Dashboard, 시스템 트레이

Phase 2:
- AudioCaptureService (node-record-lpcm16, PCM16 16kHz mono)
- HotkeyService (uiohook-napi, 더블프레스, holdMode/toggleMode)
- LocalSTTService (faster-whisper Python sidecar, 이중 조건 플러시)
- VoiceModeService 오케스트레이터 (이중 상태머신, Action Queue)
- Python sidecar (FastAPI: health/load/transcribe/shutdown)
- IPC 핸들러 (voice, stt, hotkey) + Preload API 확장

src/main/ipc/config-handlers.ts

@@ -0,0 +1,72 @@
+// src/main/ipc/config-handlers.ts
+
+import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@shared/ipc-channels'
+import { ipcSuccess, ipcError, ErrorCode } from '@shared/errors'
+import { configGet, configSet, configGetAll, configReset } from '../services/ConfigService'
+import type {
+  ConfigGetParams,
+  ConfigSetParams,
+  ConfigResetParams,
+  SetThemeParams,
+  SetLanguageParams,
+  AppConfig
+} from '@shared/types'
+
+export function registerConfigHandlers(): void {
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET, async (_event, params: ConfigGetParams) => {
+    try {
+      return ipcSuccess(configGet(params.key))
+    } catch {
+      return ipcError(ErrorCode.ConfigReadFailed, `Failed to read config key: ${params.key}`)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.SET, async (_event, params: ConfigSetParams) => {
+    try {
+      configSet(params.key, params.value as AppConfig[typeof params.key])
+      return ipcSuccess(undefined)
+    } catch {
+      return ipcError(ErrorCode.ConfigWriteFailed, `Failed to write config key: ${params.key}`)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET_ALL, async () => {
+    return ipcSuccess(configGetAll())
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.RESET, async (_event, params: ConfigResetParams) => {
+    try {
+      configReset(params.key)
+      return ipcSuccess(undefined)
+    } catch {
+      return ipcError(ErrorCode.ConfigResetFailed, 'Failed to reset config')
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET_THEME, async () => {
+    return ipcSuccess(configGet('theme'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.SET_THEME, async (_event, params: SetThemeParams) => {
+    configSet('theme', params.theme)
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET_LANGUAGE, async () => {
+    return ipcSuccess(configGet('language'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.SET_LANGUAGE, async (_event, params: SetLanguageParams) => {
+    configSet('language', params.language)
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET_AUTO_LAUNCH, async () => {
+    return ipcSuccess(configGet('autoLaunch'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.CONFIG.GET_CLOSE_TO_TRAY, async () => {
+    return ipcSuccess(configGet('closeToTray'))
+  })
+}