feat(V2-1a): Monorepo 구조 전환 — apps/desktop으로 V1 이동

- npm workspaces 루트 (apps/*, packages/*) 세팅
- V1 전체를 apps/desktop/으로 git mv (src, resources, tests, sidecar,
  scripts, electron.vite.config.ts, electron-builder.yml, vitest.config.ts,
  tsconfig.node.json, tsconfig.web.json)
- apps/desktop/package.json 신규 (name=@d3ro/desktop)
- productName: 'd3ro-voice' 명시 — app.getName()을 고정하여 userData 경로
  %APPDATA%\d3ro-voice\ 그대로 유지 (기존 DB/설정 연속성 보장)
- 루트 package.json을 workspace 루트로 재구성, 공통 devDep만 유지
  (typescript, eslint, prettier)
- turbo.json, tsconfig.base.json 추가 (Turborepo 자체 설치는 별도 sub-phase)
- memory/project_status.md 생성 (규칙 13)

검증:
- npm run typecheck 통과
- npm run build 통과 (electron-vite main+preload+renderer)
- npm run dev 실제 실행 → DB/핫키/Ollama 자동 실행 모두 정상

src/main/ipc/stt-handlers.ts

@@ -1,52 +0,0 @@
-// src/main/ipc/stt-handlers.ts
-
-import { ipcMain } from 'electron'
-import { IPC_CHANNELS } from '@shared/ipc-channels'
-import { ipcSuccess, ipcError, ErrorCode } from '@shared/errors'
-import { getLocalSTTService } from '../services/LocalSTTService'
-import { configGet, configSet } from '../services/ConfigService'
-import type { SetSTTModelParams, SetSTTLanguageParams } from '@shared/types'
-
-export function registerSTTHandlers(): void {
-  ipcMain.handle(IPC_CHANNELS.STT.GET_STATUS, async () => {
-    try {
-      const stt = getLocalSTTService()
-      return ipcSuccess(stt.getStatus())
-    } catch {
-      return ipcError(ErrorCode.STTSidecarCommunicationFailed, 'Failed to get STT status')
-    }
-  })
-
-  ipcMain.handle(IPC_CHANNELS.STT.GET_MODELS, async () => {
-    try {
-      const stt = getLocalSTTService()
-      return ipcSuccess(await stt.getModels())
-    } catch {
-      return ipcError(ErrorCode.STTModelNotFound, 'Failed to get models')
-    }
-  })
-
-  ipcMain.handle(IPC_CHANNELS.STT.GET_ACTIVE_MODEL, async () => {
-    return ipcSuccess(configGet('sttModelId'))
-  })
-
-  ipcMain.handle(IPC_CHANNELS.STT.SET_MODEL, async (_event, params: SetSTTModelParams) => {
-    try {
-      configSet('sttModelId', params.modelId)
-      const stt = getLocalSTTService()
-      await stt.initialize(params.modelId)
-      return ipcSuccess(undefined)
-    } catch {
-      return ipcError(ErrorCode.STTModelLoadFailed, 'Failed to set STT model')
-    }
-  })
-
-  ipcMain.handle(IPC_CHANNELS.STT.GET_LANGUAGE, async () => {
-    return ipcSuccess(configGet('sttLanguage'))
-  })
-
-  ipcMain.handle(IPC_CHANNELS.STT.SET_LANGUAGE, async (_event, params: SetSTTLanguageParams) => {
-    configSet('sttLanguage', params.language)
-    return ipcSuccess(undefined)
-  })
-}