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/template-handlers.ts

@@ -0,0 +1,128 @@
+// src/main/ipc/template-handlers.ts
+// Phase 12.3: 딕테이션 템플릿 IPC 핸들러
+
+import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@shared/ipc-channels'
+import { ErrorCode, ipcSuccess, ipcError } from '@shared/errors'
+import { getDictationTemplateService } from '../services/DictationTemplateService'
+import { getLogger } from '../services/LoggerService'
+import type {
+  CreateTemplateParams,
+  UpdateTemplateParams,
+  DeleteTemplateParams,
+  StartTemplateSessionParams,
+  SetFieldValueParams,
+} from '@shared/types'
+
+const logger = getLogger('template-handlers')
+
+export function registerTemplateHandlers(): void {
+  ipcMain.handle(IPC_CHANNELS.DICTATION_TEMPLATE.GET_ALL, async () => {
+    try {
+      return ipcSuccess(getDictationTemplateService().getAll())
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(
+    IPC_CHANNELS.DICTATION_TEMPLATE.CREATE,
+    async (_event, params: CreateTemplateParams) => {
+      try {
+        // 라이센스 체크
+        try {
+          const { getLicenseService } = await import('../services/LicenseService')
+          const { Feature } = await import('@shared/types')
+          const license = getLicenseService()
+          const access = license.canUse(Feature.DICTATION_TEMPLATE)
+          if (!access.allowed) {
+            license.promptUpgrade(Feature.DICTATION_TEMPLATE, 'tier_required')
+            return ipcError(ErrorCode.FeatureNotAvailable, 'Pro+ required')
+          }
+        } catch {
+          // LicenseService 미초기화 시 허용
+        }
+
+        const result = getDictationTemplateService().create(params)
+        return ipcSuccess(result)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        logger.error('Template create failed:', msg)
+        return ipcError(ErrorCode.TemplateInvalidFormat, msg)
+      }
+    },
+  )
+
+  ipcMain.handle(
+    IPC_CHANNELS.DICTATION_TEMPLATE.UPDATE,
+    async (_event, params: UpdateTemplateParams) => {
+      try {
+        const result = getDictationTemplateService().update(params)
+        return ipcSuccess(result)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        return ipcError(ErrorCode.TemplateNotFound, msg)
+      }
+    },
+  )
+
+  ipcMain.handle(
+    IPC_CHANNELS.DICTATION_TEMPLATE.DELETE,
+    async (_event, params: DeleteTemplateParams) => {
+      try {
+        getDictationTemplateService().delete(params.id)
+        return ipcSuccess(undefined)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        return ipcError(ErrorCode.TemplateNotFound, msg)
+      }
+    },
+  )
+
+  ipcMain.handle(
+    IPC_CHANNELS.DICTATION_TEMPLATE.START_SESSION,
+    async (_event, params: StartTemplateSessionParams) => {
+      try {
+        getDictationTemplateService().startSession(params.templateId)
+        return ipcSuccess(undefined)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        logger.error('Template session start failed:', msg)
+        return ipcError(ErrorCode.TemplateSessionAlreadyActive, msg)
+      }
+    },
+  )
+
+  ipcMain.handle(IPC_CHANNELS.DICTATION_TEMPLATE.CANCEL_SESSION, async () => {
+    try {
+      getDictationTemplateService().cancelSession()
+      return ipcSuccess(undefined)
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.TemplateSessionNotActive, msg)
+    }
+  })
+
+  ipcMain.handle(IPC_CHANNELS.DICTATION_TEMPLATE.GET_SESSION_STATE, async () => {
+    try {
+      return ipcSuccess(getDictationTemplateService().getSessionState())
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err)
+      return ipcError(ErrorCode.UnknownError, msg)
+    }
+  })
+
+  ipcMain.handle(
+    IPC_CHANNELS.DICTATION_TEMPLATE.SET_FIELD_VALUE,
+    async (_event, params: SetFieldValueParams) => {
+      try {
+        getDictationTemplateService().setFieldValue(params.fieldId, params.value)
+        return ipcSuccess(undefined)
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err)
+        return ipcError(ErrorCode.TemplateFieldRecordingFailed, msg)
+      }
+    },
+  )
+}