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

apps/desktop/src/main/ipc/llm-handlers.ts

@@ -0,0 +1,77 @@
+// src/main/ipc/llm-handlers.ts
+
+import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@shared/ipc-channels'
+import { ipcSuccess, ipcError, ErrorCode } from '@shared/errors'
+import { getLocalLLMService } from '../services/LocalLLMService'
+import { configGet, configSet } from '../services/ConfigService'
+import { getMainWindow } from '../windows/WindowManager'
+import type { SetLLMModelParams, SetServerUrlParams, LLMProcessParams } from '@shared/types'
+
+export function registerLLMHandlers(): void {
+  // LLM 가용성 변경 시 렌더러에 상태 전파
+  const llm = getLocalLLMService()
+  llm.on('availability-changed', () => {
+    const win = getMainWindow()
+    if (win && !win.isDestroyed()) {
+      win.webContents.send(IPC_CHANNELS.LLM.STATUS_CHANGED, { status: llm.getStatus() })
+    }
+  })
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_STATUS, async () => {
+    return ipcSuccess(getLocalLLMService().getStatus())
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_MODELS, async () => {
+    try {
+      const models = await getLocalLLMService().getModels()
+      return ipcSuccess(models)
+    } catch {
+      return ipcError(ErrorCode.LLMServerUnreachable, 'Failed to get models')
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_ACTIVE_MODEL, async () => {
+    return ipcSuccess(configGet('llmModelId'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.SET_MODEL, async (_event, params: SetLLMModelParams) => {
+    configSet('llmModelId', params.modelId)
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.PROCESS, async (_event, params: LLMProcessParams) => {
+    try {
+      const llm = getLocalLLMService()
+      const start = performance.now()
+      const processedText = await llm.processText(
+        params.text,
+        params.action,
+        params.targetLanguage,
+        params.customPrompt
+      )
+      return ipcSuccess({
+        originalText: params.text,
+        processedText,
+        action: params.action,
+        processingTimeMs: Math.round(performance.now() - start),
+        tokenCount: 0
+      })
+    } catch {
+      return ipcError(ErrorCode.LLMProcessingFailed, 'LLM processing failed')
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.CANCEL_PROCESS, async () => {
+    getLocalLLMService().cancelGeneration()
+    return ipcSuccess(undefined)
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.GET_SERVER_URL, async () => {
+    return ipcSuccess(configGet('ollamaServerUrl'))
+  })
+
+  ipcMain.handle(IPC_CHANNELS.LLM.SET_SERVER_URL, async (_event, params: SetServerUrlParams) => {
+    configSet('ollamaServerUrl', params.url)
+    return ipcSuccess(undefined)
+  })
+}