Phase 12~13 전체 구현: Pro+ 피처 6종 + 음성 대화 + RAG + OS 자동화

Phase 12:
- FileTranscriptionService: ffmpeg PCM 변환 + 30초 청크 순차 STT
- MeetingSummaryService: 자막 세션 → LLM 자동 요약 + DB summaryText
- DictationTemplateService: 필드별 음성 입력 상태 머신 + 프리셋 3개

Phase 13.1:
- VoiceConversationService: STT→Ollama /api/chat→TTS 대화 루프 (10턴)
- TTSPlaybackService: Windows SAPI 문장 단위 큐 재생
- LocalLLMService.chatStream: Ollama /api/chat 스트리밍

Phase 13.2:
- RAGService: Ollama 임베딩 + SQLite 벡터 + 코사인 유사도 검색
- KnowledgeBasePage: 문서 관리 + 질문/답변 UI
- PDF 파서: zlib FlateDecode 해제 + BT/ET 텍스트 추출

Phase 13.3:
- VoiceActionService: LLM JSON 액션 플랜 생성 + 실행
- 프리셋 6개 (크롬/메모장/탐색기/볼륨), 위험 명령 차단

공통: IPC ~70채널, 에러코드 780-878, i18n 100+키
버그픽스: 라이선스 로컬 키 우선, i18n featureLabel, DOM 중첩

src/main/ipc/voice-action-handlers.ts

@@ -0,0 +1,74 @@
+// src/main/ipc/voice-action-handlers.ts
+// Phase 13.3: OS 자동화 IPC 핸들러
+
+import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@shared/ipc-channels'
+import { ErrorCode, ipcSuccess, ipcError } from '@shared/errors'
+import { getVoiceActionService } from '../services/VoiceActionService'
+import { getLogger } from '../services/LoggerService'
+import type { VoiceActionExecuteParams } from '@shared/types'
+
+const logger = getLogger('voice-action-handlers')
+
+export function registerVoiceActionHandlers(): void {
+  ipcMain.handle(
+    IPC_CHANNELS.VOICE_ACTION.EXECUTE,
+    async (_event, params: VoiceActionExecuteParams) => {
+      try {
+        await getVoiceActionService().execute(params.text)
+        return ipcSuccess(undefined)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        logger.error('Voice action failed:', msg)
+        return ipcError(ErrorCode.VoiceActionExecutionFailed, msg)
+      }
+    },
+  )
+
+  ipcMain.handle(IPC_CHANNELS.VOICE_ACTION.GET_PRESETS, async () => {
+    try {
+      return ipcSuccess(getVoiceActionService().getPresets())
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.VOICE_ACTION.GET_HISTORY, async () => {
+    try {
+      return ipcSuccess(getVoiceActionService().getHistory())
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.VOICE_ACTION.CLEAR_HISTORY, async () => {
+    try {
+      getVoiceActionService().clearHistory()
+      return ipcSuccess(undefined)
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.VOICE_ACTION.SET_ENABLED, async (_event, params: { enabled: boolean }) => {
+    try {
+      getVoiceActionService().setEnabled(params.enabled)
+      return ipcSuccess(undefined)
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.VOICE_ACTION.IS_ENABLED, async () => {
+    try {
+      return ipcSuccess(getVoiceActionService().isEnabled)
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+}