fix(desktop): Payple 배포 완료 + billing URL 환경분기 + 세션만료 버그 수정

- OPEN_BILLING: app.isPackaged 기반 dev/prod URL 분기
- CloudSyncService: stored token 없을 때 auth-changed null emit 누락 수정
- Payple Edge Functions 3개 배포 ACTIVE 확인

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

@@ -1,7 +1,7 @@
 // src/main/ipc/license-handlers.ts
 // Phase 11: 라이센스 IPC 핸들러
 
-import { ipcMain, BrowserWindow, shell } from 'electron'
+import { app, ipcMain, BrowserWindow, shell } from 'electron'
 import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
 import { ipcSuccess, ipcError, ErrorCode } from '@d3ro/core/errors'
 import { getLicenseService } from '../services/LicenseService'
@@ -100,9 +100,8 @@ export function registerLicenseHandlers(): void {
 
   ipcMain.handle(IPC_CHANNELS.LICENSE.OPEN_BILLING, async (_event, params: { tier: 'pro' | 'pro_plus' }) => {
     try {
-      // Phase 3.2-B: 웹 결제 페이지 열기
-      // 프로덕션: https://d3ro.dev/billing, 개발: NEXT_PUBLIC_SITE_URL 참조
-      const billingUrl = `https://d3ro.dev/billing?tier=${params.tier}`
+      const baseUrl = app.isPackaged ? 'https://d3ro.dev' : 'http://localhost:3000'
+      const billingUrl = `${baseUrl}/billing?tier=${params.tier}`
       await shell.openExternal(billingUrl)
       return ipcSuccess(undefined)
     } catch (err) {

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

@@ -130,6 +130,9 @@ class CloudSyncService extends EventEmitter {
         })
         this.emit('auth-changed', { user: null })
       }
+    } else {
+      // 저장된 토큰 없음 → 미인증 상태를 렌더러에 명시 전달
+      this.emit('auth-changed', { user: null })
     }
 
     logger.info('CloudSyncService initialized')