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/services/ChainService.ts

@@ -3,7 +3,7 @@
 // LLMChain을 electron-store에 저장하고, 체인을 순차 실행한다.
 
 import { getLogger } from './LoggerService'
-import { configGet } from './ConfigService'
+import { configGet, configSet } from './ConfigService'
 import { getCustomInstructionService } from './CustomInstructionService'
 import { getLocalLLMService } from './LocalLLMService'
 import { getMainWindow } from '../windows/WindowManager'
@@ -29,7 +29,7 @@ let initialized = false
 
 function loadChains(): LLMChain[] {
   try {
-    const stored = configGet('llmChains' as never) as LLMChain[] | undefined
+    const stored = configGet('llmChains') as LLMChain[] | undefined
     if (Array.isArray(stored) && stored.length > 0) {
       return stored
     }
@@ -41,11 +41,7 @@ function loadChains(): LLMChain[] {
 
 function saveChains(): void {
   try {
-    // eslint-disable-next-line @typescript-eslint/no-require-imports
-    const { configSet } = require('./ConfigService') as {
-      configSet: (key: never, value: never) => void
-    }
-    configSet('llmChains' as never, chains as never)
+    configSet('llmChains', chains)
   } catch (error) {
     logger.warn(
       `Failed to save chains: ${error instanceof Error ? error.message : String(error)}`

apps/desktop/src/main/services/CustomInstructionService.ts

@@ -3,26 +3,11 @@
 // electron-store에 저장, 프리셋 5개 기본 제공.
 
 import { getLogger } from './LoggerService'
-import { configGet } from './ConfigService'
+import { configGet, configSet } from './ConfigService'
+import type { CustomInstruction } from '@d3ro/core/types'
 
 const logger = getLogger('CustomInstructionService')
 
-// ============================================================
-// 타입
-// ============================================================
-
-export interface CustomInstruction {
-  id: string
-  name: string
-  description: string
-  prompt: string
-  icon: string
-  isBuiltin: boolean
-  order: number
-  createdAt: number
-  updatedAt: number
-}
-
 type CreateInput = Omit<CustomInstruction, 'id' | 'isBuiltin' | 'order' | 'createdAt' | 'updatedAt'>
 
 // ============================================================
@@ -91,7 +76,7 @@ let initialized = false
 function loadInstructions(): CustomInstruction[] {
   // electron-store에서 로드 시도
   try {
-    const stored = configGet('customInstructions' as never) as CustomInstruction[] | undefined
+    const stored = configGet('customInstructions') as CustomInstruction[] | undefined
     if (Array.isArray(stored) && stored.length > 0) {
       return stored
     }
@@ -110,8 +95,7 @@ function loadInstructions(): CustomInstruction[] {
 
 function saveInstructions(): void {
   try {
-    const { configSet } = require('./ConfigService')
-    configSet('customInstructions' as never, instructions as never)
+    configSet('customInstructions', instructions)
   } catch (error) {
     logger.warn(`Failed to save instructions: ${error instanceof Error ? error.message : String(error)}`)
   }

apps/desktop/src/main/services/MeetingModeService.ts

@@ -145,9 +145,8 @@ class MeetingModeService extends EventEmitter {
 
     // 회의 모드는 마이크 캡처 강제 — ConfigService 값도 임시 변경
     // (CaptionService.start()가 ConfigService에서 다시 읽기 때문)
-    type AppConfigKey = keyof import('@d3ro/core/types').AppConfig
-    const prevAudioSource = configGet('captionAudioSource' as AppConfigKey) as unknown as string
-    configSet('captionAudioSource' as AppConfigKey, 'mic' as never)
+    const prevAudioSource = configGet('captionAudioSource')
+    configSet('captionAudioSource', 'mic')
 
     try {
       await captionService.start()
@@ -156,12 +155,12 @@ class MeetingModeService extends EventEmitter {
       hideCaptionOverlay()
       // ConfigService 원래 값 복원
       if (prevAudioSource) {
-        configSet('captionAudioSource' as AppConfigKey, prevAudioSource as never)
+        configSet('captionAudioSource', prevAudioSource)
       }
     } catch (err) {
       // ConfigService 원래 값 복원
       if (prevAudioSource) {
-        configSet('captionAudioSource' as AppConfigKey, prevAudioSource as never)
+        configSet('captionAudioSource', prevAudioSource)
       }
       // 시작 실패 시 복원
       captionService.off('segment', this._segmentHandler)

apps/desktop/src/main/services/VoiceCommandService.ts

@@ -67,9 +67,8 @@ const DEFAULT_KEYWORDS: ReadonlyArray<DefaultKeywordEntry> = [
 // electron-store 키 (ConfigService와 별도 네임스페이스)
 // ============================================================
 
-// configGet/configSet에 타입이 없는 키를 사용하므로 as never 캐스팅 필요
-const STORE_KEY_RULES = 'voiceCommandRules' as never
-const STORE_KEY_ENABLED = 'voiceCommandsEnabled' as never
+const STORE_KEY_RULES: keyof import('@d3ro/core/types').AppConfig = 'voiceCommandRules'
+const STORE_KEY_ENABLED: keyof import('@d3ro/core/types').AppConfig = 'voiceCommandsEnabled'
 
 // ============================================================
 // 키워드 매칭 엔진
@@ -292,7 +291,7 @@ class VoiceCommandService {
 
   private saveRules(): void {
     try {
-      configSet(STORE_KEY_RULES, this.rules as never)
+      configSet(STORE_KEY_RULES, this.rules)
     } catch (error) {
       logger.warn(
         `Failed to save voice command rules: ${error instanceof Error ? error.message : String(error)}`
@@ -311,7 +310,7 @@ class VoiceCommandService {
 
   private saveEnabled(): void {
     try {
-      configSet(STORE_KEY_ENABLED, this.enabled as never)
+      configSet(STORE_KEY_ENABLED, this.enabled)
     } catch (error) {
       logger.warn(
         `Failed to save voice command enabled state: ${error instanceof Error ? error.message : String(error)}`

apps/desktop/src/main/services/VoiceModeService.ts

@@ -752,7 +752,7 @@ class VoiceModeService extends EventEmitter {
       if (action === 'chain') {
         try {
           const { getChainService } = await import('./ChainService')
-          const activeChainId = configGet('activeChainId' as keyof import('@d3ro/core/types').AppConfig) as unknown as string
+          const activeChainId = configGet('activeChainId')
           if (activeChainId) {
             const chainResult = await getChainService().execute(activeChainId, contextPrefix + transcribedText)
             if (this._isInTerminalState()) return
@@ -769,7 +769,7 @@ class VoiceModeService extends EventEmitter {
 
       // 음성 단축키 오버라이드 또는 활성 명령어
       const effectiveInstructionId = overrideInstructionId
-        ?? (configGet('activeInstructionId' as keyof import('@d3ro/core/types').AppConfig) as unknown as string)
+        ?? configGet('activeInstructionId')
 
       if (action === 'custom' || overrideInstructionId) {
         let customPrompt = contextPrefix + transcribedText

apps/desktop/src/main/services/index.ts

@@ -1,31 +0,0 @@
-// src/main/services/index.ts — 서비스 레지스트리
-
-export { initLoggerService, getLogger } from './LoggerService'
-export {
-  initConfigService,
-  getConfigService,
-  configGet,
-  configSet,
-  configGetAll,
-  configReset,
-  onConfigChanged
-} from './ConfigService'
-export {
-  getLocalSTTService,
-  LocalSTTService,
-  STTState
-} from './LocalSTTService'
-export type {
-  TranscriptionResult,
-  TranscriptionSegment,
-  TranscribeOptions,
-  LocalSTTEvents
-} from './LocalSTTService'
-export { getHotkeyService } from './HotkeyService'
-export { getVoiceModeService } from './VoiceModeService'
-export { getAudioCaptureService } from './AudioCaptureService'
-export { getTextInsertService } from './TextInsertService'
-export { getLocalLLMService } from './LocalLLMService'
-export { getHistoryService } from './HistoryService'
-export { getDictionaryService } from './DictionaryService'
-export { getCustomInstructionService } from './CustomInstructionService'