refactor(main): IPC 채널 SSOT 일원화 + AppConfig 타입 강화 (WS2)

- ipc-channels.ts SSOT에 9개 그룹/키 추가: INSTRUCTION, SYSTEM_AUDIO,
  POPUP_RESULT/HISTORY/COMMAND/CAPTION, VOICE_PARTIAL, CLIPBOARD, APP,
  VOICE_CONVERSATION.FINISH_LISTENING
- WindowManager/handlers/bootstrap 하드코딩 채널 -> IPC_CHANNELS 교체.
  불일치 4건(result:* vs window:tip*)은 preload 재검증 후 SSOT로 통일.
  notifyRenderer channel: string -> IPCChannel 타입 좁힘.
- AppConfig에 7개 누락 키 추가(customInstructions, llmChains,
  voiceCommandRules, voiceCommandsEnabled, activeInstructionId,
  activeChainId, captionAudioSource) -> as never 16건 제거.
- ChainService/CustomInstructionService/WindowManager dynamic require -> static import.
- services/index.ts 데드 레지스트리 제거 (import 0건).
SKIP: ipcSuccess/ipcError 헬퍼 통일, catch 패턴(별도)
정책: docs/REFACTOR_POLICY.md DP2, DP9

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

@@ -9,7 +9,7 @@ import type { CaptionConfig } from '@d3ro/core/types'
 
 export function registerCaptionHandlers(): void {
   // 시스템 오디오 루프백: setDisplayMediaRequestHandler로 audio: 'loopback' 설정
-  ipcMain.handle('system-audio:enable-loopback', async () => {
+  ipcMain.handle(IPC_CHANNELS.SYSTEM_AUDIO.ENABLE_LOOPBACK, async () => {
     session.defaultSession.setDisplayMediaRequestHandler(async (_request, callback) => {
       const sources = await desktopCapturer.getSources({ types: ['screen'] })
       if (sources.length === 0) {
@@ -21,7 +21,7 @@ export function registerCaptionHandlers(): void {
     return ipcSuccess(undefined)
   })
 
-  ipcMain.handle('system-audio:disable-loopback', async () => {
+  ipcMain.handle(IPC_CHANNELS.SYSTEM_AUDIO.DISABLE_LOOPBACK, async () => {
     session.defaultSession.setDisplayMediaRequestHandler(null)
     return ipcSuccess(undefined)
   })

apps/desktop/src/main/ipc/cloud-sync-handlers.ts

@@ -7,6 +7,7 @@ import { D3ROError, ErrorCode } from '@d3ro/core/errors'
 import type { IPCResult } from '@d3ro/core/errors'
 import { getCloudSyncService } from '../services/CloudSyncService'
 import { getLogger } from '../services/LoggerService'
+import { configSet } from '../services/ConfigService'
 
 const logger = getLogger('cloud-sync-handlers')
 
@@ -70,7 +71,7 @@ export function registerCloudSyncHandlers(): void {
   ipcMain.handle(IPC_CHANNELS.CLOUD_SYNC.PUSH_ALL, async () => {
     try {
       const result = await sync.pushAll()
-      configSet('cloudSyncLastAt' as never, Date.now() as never)
+      configSet('cloudSyncLastAt', Date.now())
       return ok(result)
     } catch (e) {
       return fail(e)
@@ -80,7 +81,7 @@ export function registerCloudSyncHandlers(): void {
   ipcMain.handle(IPC_CHANNELS.CLOUD_SYNC.PULL_ALL, async () => {
     try {
       const result = await sync.pullAll()
-      configSet('cloudSyncLastAt' as never, Date.now() as never)
+      configSet('cloudSyncLastAt', Date.now())
       return ok(result)
     } catch (e) {
       return fail(e)

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

@@ -1,32 +1,22 @@
 // src/main/ipc/instruction-handlers.ts
 
 import { ipcMain } from 'electron'
+import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
 import { ipcSuccess, ipcError, ErrorCode } from '@d3ro/core/errors'
 import { getCustomInstructionService } from '../services/CustomInstructionService'
-import type { CustomInstruction } from '../services/CustomInstructionService'
-
-// IPC_CHANNELS에 instruction 채널이 없으므로 직접 문자열 사용
-// (Phase 6 전용, 설계서 02에는 미포함)
-const CHANNELS = {
-  GET_ALL: 'instruction:getAll',
-  GET_BY_ID: 'instruction:getById',
-  CREATE: 'instruction:create',
-  UPDATE: 'instruction:update',
-  DELETE: 'instruction:delete',
-  REORDER: 'instruction:reorder'
-} as const
+import type { CustomInstruction } from '@d3ro/core/types'
 
 export function registerInstructionHandlers(): void {
-  ipcMain.handle(CHANNELS.GET_ALL, async () => {
+  ipcMain.handle(IPC_CHANNELS.INSTRUCTION.GET_ALL, async () => {
     return ipcSuccess(getCustomInstructionService().getAll())
   })
 
-  ipcMain.handle(CHANNELS.GET_BY_ID, async (_event, params: { id: string }) => {
+  ipcMain.handle(IPC_CHANNELS.INSTRUCTION.GET_BY_ID, async (_event, params: { id: string }) => {
     return ipcSuccess(getCustomInstructionService().getById(params.id))
   })
 
   ipcMain.handle(
-    CHANNELS.CREATE,
+    IPC_CHANNELS.INSTRUCTION.CREATE,
     async (
       _event,
       params: { name: string; description: string; prompt: string; icon?: string }
@@ -41,7 +31,7 @@ export function registerInstructionHandlers(): void {
   )
 
   ipcMain.handle(
-    CHANNELS.UPDATE,
+    IPC_CHANNELS.INSTRUCTION.UPDATE,
     async (_event, params: { id: string; data: Partial<CustomInstruction> }) => {
       try {
         const result = getCustomInstructionService().update(params.id, params.data)
@@ -52,7 +42,7 @@ export function registerInstructionHandlers(): void {
     }
   )
 
-  ipcMain.handle(CHANNELS.DELETE, async (_event, params: { id: string }) => {
+  ipcMain.handle(IPC_CHANNELS.INSTRUCTION.DELETE, async (_event, params: { id: string }) => {
     const result = getCustomInstructionService().delete(params.id)
     if (!result) {
       return ipcError(ErrorCode.ConfigWriteFailed, 'Cannot delete builtin instruction')
@@ -60,7 +50,7 @@ export function registerInstructionHandlers(): void {
     return ipcSuccess(undefined)
   })
 
-  ipcMain.handle(CHANNELS.REORDER, async (_event, params: { ids: string[] }) => {
+  ipcMain.handle(IPC_CHANNELS.INSTRUCTION.REORDER, async (_event, params: { ids: string[] }) => {
     getCustomInstructionService().reorder(params.ids)
     return ipcSuccess(undefined)
   })

apps/desktop/src/main/ipc/voice-conversation-handlers.ts

@@ -131,7 +131,7 @@ export function registerVoiceConversationHandlers(): void {
   )
 
   // finishListening — 렌더러에서 녹음 종료 버튼 클릭 시
-  ipcMain.handle('voiceConversation:finishListening', async () => {
+  ipcMain.handle(IPC_CHANNELS.VOICE_CONVERSATION.FINISH_LISTENING, async () => {
     try {
       await getVoiceConversationService().finishListening()
       return ipcSuccess(undefined)

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

@@ -30,11 +30,11 @@ export function registerWindowHandlers(): void {
   })
 
   // 팝업 윈도우 hide 요청 (렌더러 → 메인)
-  ipcMain.on('window:hideResultPopup', () => {
+  ipcMain.on(IPC_CHANNELS.WINDOW.HIDE_RESULT_POPUP, () => {
     hideResultPopup()
   })
 
-  ipcMain.on('window:hideRecordingTip', () => {
+  ipcMain.on(IPC_CHANNELS.WINDOW.HIDE_RECORDING_TIP, () => {
     hideRecordingTip()
   })