refactor(desktop): LemonSqueezy API 코드 완전 제거 (~150줄)

- LicenseService: LS API 상수/인터페이스/메서드 4개 삭제
- activate(): 로컬 키 검증 전용으로 단순화
- deactivate(): LS API 호출 제거
- initialize(): _tryPeriodicValidation 제거
- site/ taxNote: LemonSqueezy → Payple (10 locale)

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

@@ -1,5 +1,5 @@
 // src/main/services/LicenseService.ts
-// Phase 11: Freemium 라이센스 관리 — Feature Gating + 사용량 추적 + LemonSqueezy 연동
+// Phase 11: Freemium 라이센스 관리 — Feature Gating + 사용량 추적
 
 import { EventEmitter } from 'events'
 import { createHash } from 'crypto'
@@ -104,9 +104,6 @@ const OFFLINE_GRACE_PERIOD_MS = 30 * 24 * 60 * 60 * 1000
 /** 온라인 재검증 주기: 30일 */
 const REVERIFY_INTERVAL_MS = 30 * 24 * 60 * 60 * 1000
 
-/** LemonSqueezy API base URL */
-const LEMONSQUEEZY_API = 'https://api.lemonsqueezy.com/v1/licenses'
-
 function tierAtLeast(current: LicenseTier, required: LicenseTier): boolean {
   return TIER_ORDER[current] >= TIER_ORDER[required]
 }
@@ -126,70 +123,10 @@ function getTomorrowMidnight(): string {
   return tomorrow.toISOString()
 }
 
-/** LemonSqueezy activate 응답 타입 */
-interface LemonSqueezyActivateResponse {
-  activated: boolean
-  error?: string
-  license_key?: {
-    id: number
-    status: string
-    key: string
-    activation_limit: number
-    activation_usage: number
-  }
-  instance?: {
-    id: string
-    name: string
-  }
-  meta?: {
-    store_id: number
-    order_id: number
-    product_id: number
-    product_name: string
-    variant_id: number
-    variant_name: string
-  }
-}
-
-/** LemonSqueezy validate 응답 타입 */
-interface LemonSqueezyValidateResponse {
-  valid: boolean
-  error?: string
-  license_key?: {
-    id: number
-    status: string
-    key: string
-    activation_limit: number
-    activation_usage: number
-  }
-  meta?: {
-    store_id: number
-    order_id: number
-    product_id: number
-    product_name: string
-    variant_id: number
-    variant_name: string
-  }
-}
-
-/** variant_name → LicenseTier 매핑 */
-function variantNameToTier(variantName: string): LicenseTier {
-  const lower = variantName.toLowerCase()
-  if (lower.includes('pro_plus') || lower.includes('pro+') || lower.includes('proplus')) {
-    return 'pro_plus'
-  }
-  if (lower.includes('pro')) {
-    return 'pro'
-  }
-  return 'free'
-}
-
 // ── LicenseService 싱글톤 ──────────────────────────────────
 class LicenseService extends EventEmitter {
   private _info: LicenseInfo
   private _initialized = false
-  /** LemonSqueezy instance_id (디바이스별, 비활성화에 필요) */
-  private _instanceId: string | null = null
 
   constructor() {
     super()
@@ -226,7 +163,6 @@ class LicenseService extends EventEmitter {
     const storedActivatedAt = this._readStoredField<number>('licenseActivatedAt')
     const storedLastVerified = this._readStoredField<number>('licenseLastVerifiedAt')
     const storedGrace = this._readStoredField<number>('licenseOfflineGraceUntil')
-    this._instanceId = this._readStoredField<string>('licenseInstanceId')
 
     if (storedTier && storedTier !== 'free' && storedKey) {
       this._info.tier = storedTier
@@ -239,9 +175,6 @@ class LicenseService extends EventEmitter {
       if (this._info.offlineGraceUntil && Date.now() > this._info.offlineGraceUntil) {
         logger.warn('Offline grace period expired, downgrading to free')
         this._downgradeToFree()
-      } else {
-        // 온라인 재검증이 필요한 경우 비동기로 시도
-        this._tryPeriodicValidation()
       }
     }
 
@@ -419,9 +352,9 @@ class LicenseService extends EventEmitter {
   }
 
   /**
-   * 라이센스 키 활성화.
+   * 라이센스 키 활성화 (로컬 키 검증 전용).
-   * 1. LemonSqueezy API로 활성화 시도
+   * D3RO-PRO-XXXX-XXXX / D3RO-PLUS-XXXX-XXXX 패턴으로 개발/테스트용.
-   * 2. API 실패 시 로컬 키 검증으로 폴백 (개발/오프라인)
+   * 프로덕션 결제는 Payple 웹 결제 → CloudSync 티어 갱신 경로 사용.
    */
   async activate(key: string): Promise<ActivateLicenseResult> {
     const trimmedKey = key.trim()
@@ -429,67 +362,29 @@ class LicenseService extends EventEmitter {
       return { success: false, tier: 'free', message: 'License key is empty' }
     }
 
-    // 1. 로컬 키 검증 먼저 (개발/테스트용 D3RO-PRO-*, D3RO-PLUS-* 패턴)
     const localTier = this._validateKeyLocally(trimmedKey)
-    if (localTier) {
+    if (!localTier) {
-      logger.info(`Local key validated: tier=${localTier}`)
-      const now = Date.now()
-      this._info = {
-        ...this._info,
-        tier: localTier,
-        licenseKey: trimmedKey,
-        activatedAt: now,
-        lastVerifiedAt: now,
-        offlineGraceUntil: now + OFFLINE_GRACE_PERIOD_MS,
-      }
-      this._persistLicenseInfo()
-      this._sendToRenderer(IPC_CHANNELS.LICENSE.TIER_CHANGED, this._info)
-      return { success: true, tier: localTier, message: `Activated ${localTier} license (local)` }
-    }
-
-    // 2. LemonSqueezy API 시도
-    const apiResult = await this._activateViaLemonSqueezy(trimmedKey)
-    if (apiResult) {
-      return apiResult
-    }
-
-    // 3. 둘 다 실패
-    const tier = null as LicenseTier | null
-    if (!tier) {
       return { success: false, tier: 'free', message: 'Invalid license key' }
     }
 
+    logger.info(`Local key validated: tier=${localTier}`)
     const now = Date.now()
     this._info = {
       ...this._info,
-      tier,
+      tier: localTier,
       licenseKey: trimmedKey,
       activatedAt: now,
       lastVerifiedAt: now,
       offlineGraceUntil: now + OFFLINE_GRACE_PERIOD_MS,
     }
-
     this._persistLicenseInfo()
-    this.emit('tier-changed', this.getInfo())
+    this._sendToRenderer(IPC_CHANNELS.LICENSE.TIER_CHANGED, this._info)
-    logger.info(`License activated (local): tier=${tier}`)
+    return { success: true, tier: localTier, message: `Activated ${localTier} license (local)` }
-
-    return {
-      success: true,
-      tier,
-      message: `Successfully activated ${tier} license (offline mode)`,
-    }
   }
 
   /** 라이센스 비활성화 (Free로 복귀) */
   async deactivate(): Promise<void> {
-    // LemonSqueezy API로 비활성화 시도
-    if (this._info.licenseKey && this._instanceId) {
-      await this._deactivateViaLemonSqueezy(this._info.licenseKey, this._instanceId)
-    }
-
     this._downgradeToFree()
-    this._instanceId = null
-    this._writeStoredField('licenseInstanceId', null)
     this.emit('tier-changed', this.getInfo())
     logger.info('License deactivated, reverted to free')
   }
@@ -636,176 +531,10 @@ class LicenseService extends EventEmitter {
     ]
   }
 
-  // ── LemonSqueezy API ───────────────────────────────────
-
-  /**
-   * LemonSqueezy API를 통한 라이센스 활성화.
-   * API 실패 시 null 반환 (폴백 처리를 호출자에게 위임).
-   */
-  private async _activateViaLemonSqueezy(key: string): Promise<ActivateLicenseResult | null> {
-    try {
-      const response = await fetch(`${LEMONSQUEEZY_API}/activate`, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json', Accept: 'application/json' },
-        body: JSON.stringify({
-          license_key: key,
-          instance_name: this._info.machineId,
-        }),
-        signal: AbortSignal.timeout(10000),
-      })
-
-      const data = await response.json() as LemonSqueezyActivateResponse
-
-      if (!data.activated || !data.license_key) {
-        const errorMsg = data.error ?? 'Activation rejected by server'
-        logger.warn(`LemonSqueezy activation failed: ${errorMsg}`)
-        return { success: false, tier: 'free', message: errorMsg }
-      }
-
-      // 키 상태 체크
-      if (data.license_key.status === 'expired') {
-        return { success: false, tier: 'free', message: 'License key has expired' }
-      }
-
-      // variant_name으로 티어 결정
-      const tier = data.meta?.variant_name
-        ? variantNameToTier(data.meta.variant_name)
-        : 'pro'
-
-      const now = Date.now()
-      this._info = {
-        ...this._info,
-        tier,
-        licenseKey: key,
-        activatedAt: now,
-        lastVerifiedAt: now,
-        offlineGraceUntil: now + OFFLINE_GRACE_PERIOD_MS,
-      }
-
-      // instance_id 저장 (비활성화에 필요)
-      if (data.instance?.id) {
-        this._instanceId = data.instance.id
-        this._writeStoredField('licenseInstanceId', this._instanceId)
-      }
-
-      this._persistLicenseInfo()
-      this.emit('tier-changed', this.getInfo())
-      logger.info(`License activated via LemonSqueezy: tier=${tier}`)
-
-      return {
-        success: true,
-        tier,
-        message: `Successfully activated ${tier} license`,
-      }
-    } catch (err) {
-      // 네트워크 에러, 타임아웃 등 — null 반환하여 로컬 폴백
-      logger.warn(`LemonSqueezy API unreachable: ${err instanceof Error ? err.message : String(err)}`)
-      return null
-    }
-  }
-
-  /**
-   * LemonSqueezy API를 통한 라이센스 비활성화.
-   * 실패해도 로컬 상태는 변경 (best-effort).
-   */
-  private async _deactivateViaLemonSqueezy(key: string, instanceId: string): Promise<void> {
-    try {
-      await fetch(`${LEMONSQUEEZY_API}/deactivate`, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json', Accept: 'application/json' },
-        body: JSON.stringify({
-          license_key: key,
-          instance_id: instanceId,
-        }),
-        signal: AbortSignal.timeout(10000),
-      })
-      logger.info('License deactivated via LemonSqueezy API')
-    } catch (err) {
-      logger.warn(`LemonSqueezy deactivation failed (best-effort): ${err instanceof Error ? err.message : String(err)}`)
-    }
-  }
-
-  /**
-   * LemonSqueezy API를 통한 온라인 검증.
-   * @returns true if license is valid, false otherwise
-   */
-  private async _validateOnline(): Promise<boolean> {
-    if (!this._info.licenseKey) return false
-
-    try {
-      const response = await fetch(`${LEMONSQUEEZY_API}/validate`, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json', Accept: 'application/json' },
-        body: JSON.stringify({
-          license_key: this._info.licenseKey,
-          instance_name: this._info.machineId,
-        }),
-        signal: AbortSignal.timeout(10000),
-      })
-
-      const data = await response.json() as LemonSqueezyValidateResponse
-
-      if (!data.valid) {
-        logger.warn(`Online validation failed: ${data.error ?? 'invalid'}`)
-
-        // 키가 expired인 경우 다운그레이드
-        if (data.license_key?.status === 'expired') {
-          logger.warn('License expired, downgrading to free')
-          this._downgradeToFree()
-          this.emit('tier-changed', this.getInfo())
-          return false
-        }
-
-        return false
-      }
-
-      // 검증 성공 — 타임스탬프 갱신
-      const now = Date.now()
-      this._info.lastVerifiedAt = now
-      this._info.offlineGraceUntil = now + OFFLINE_GRACE_PERIOD_MS
-
-      // variant가 바뀌었을 수 있음 (업/다운그레이드)
-      if (data.meta?.variant_name) {
-        const newTier = variantNameToTier(data.meta.variant_name)
-        if (newTier !== this._info.tier) {
-          logger.info(`Tier changed via validation: ${this._info.tier} -> ${newTier}`)
-          this._info.tier = newTier
-          this.emit('tier-changed', this.getInfo())
-        }
-      }
-
-      this._persistLicenseInfo()
-      logger.info('Online license validation successful')
-      return true
-    } catch (err) {
-      // 네트워크 에러 — 오프라인 유예 기간 유지
-      logger.warn(`Online validation failed (network): ${err instanceof Error ? err.message : String(err)}`)
-      return false
-    }
-  }
-
-  /**
-   * 주기적 온라인 검증 (초기화 시 호출).
-   * lastVerifiedAt으로부터 REVERIFY_INTERVAL_MS 이상 경과했으면 비동기 검증.
-   */
-  private _tryPeriodicValidation(): void {
-    if (!this._info.lastVerifiedAt) return
-
-    const elapsed = Date.now() - this._info.lastVerifiedAt
-    if (elapsed > REVERIFY_INTERVAL_MS) {
-      logger.info('Periodic license re-validation needed, attempting...')
-      // 비동기 실행 (결과를 기다리지 않음 — 초기화 차단 방지)
-      this._validateOnline().catch((err) => {
-        logger.warn(`Periodic validation error: ${err instanceof Error ? err.message : String(err)}`)
-      })
-    }
-  }
-
   // ── Private helpers ────────────────────────────────────
 
   /**
-   * 로컬 키 검증 (개발/테스트 + 오프라인 패턴).
+   * 로컬 키 검증 (개발/테스트용).
-   * 프로덕션에서는 LemonSqueezy API가 우선 사용됨.
    *
    * 키 포맷 규칙:
    *   D3RO-PRO-XXXX-XXXX  -> pro

site/src/i18n/locales/de.ts

@@ -97,7 +97,7 @@ export const de: Translations = {
     downloadFree: 'Gratis herunterladen',
     getPro: 'Pro holen',
     getProPlus: 'Pro+ holen',
-    taxNote: 'Alle Preise zzgl. MwSt. Sichere Zahlung uber LemonSqueezy.',
+    taxNote: 'Alle Preise zzgl. MwSt. Sichere Zahlung uber Payple.',
     rows: [
       { feature: 'Sprachdiktat', free: '15/Tag', pro: true, proPlus: true },
       { feature: 'KI-Textkorrektur', free: '3/Tag', pro: true, proPlus: true },

site/src/i18n/locales/en.ts

@@ -97,7 +97,7 @@ export const en: Translations = {
     downloadFree: 'Download Free',
     getPro: 'Get Pro',
     getProPlus: 'Get Pro+',
-    taxNote: 'All prices exclude tax. Secure payment via LemonSqueezy.',
+    taxNote: 'All prices exclude tax. Secure payment via Payple.',
     rows: [
       { feature: 'Voice Dictation', free: '15/day', pro: true, proPlus: true },
       { feature: 'AI Text Polish', free: '3/day', pro: true, proPlus: true },

site/src/i18n/locales/es.ts

@@ -97,7 +97,7 @@ export const es: Translations = {
     downloadFree: 'Descargar gratis',
     getPro: 'Obtener Pro',
     getProPlus: 'Obtener Pro+',
-    taxNote: 'Todos los precios sin impuestos. Pago seguro via LemonSqueezy.',
+    taxNote: 'Todos los precios sin impuestos. Pago seguro via Payple.',
     rows: [
       { feature: 'Dictado por voz', free: '15/dia', pro: true, proPlus: true },
       { feature: 'Pulido con IA', free: '3/dia', pro: true, proPlus: true },

site/src/i18n/locales/fr.ts

@@ -97,7 +97,7 @@ export const fr: Translations = {
     downloadFree: 'Telecharger gratuit',
     getPro: 'Obtenir Pro',
     getProPlus: 'Obtenir Pro+',
-    taxNote: 'Tous les prix hors taxes. Paiement securise via LemonSqueezy.',
+    taxNote: 'Tous les prix hors taxes. Paiement securise via Payple.',
     rows: [
       { feature: 'Dictee vocale', free: '15/jour', pro: true, proPlus: true },
       { feature: 'Correction IA', free: '3/jour', pro: true, proPlus: true },

site/src/i18n/locales/ja.ts

@@ -97,7 +97,7 @@ export const ja: Translations = {
     downloadFree: '無料ダウンロード',
     getPro: 'Proを購入',
     getProPlus: 'Pro+を購入',
-    taxNote: '表示価格は税抜きです。LemonSqueezyによる安全な決済。',
+    taxNote: '表示価格は税抜きです。Paypleによる安全な決済。',
     rows: [
       { feature: '音声ディクテーション', free: '15回/日', pro: true, proPlus: true },
       { feature: 'AIテキスト校正', free: '3回/日', pro: true, proPlus: true },

site/src/i18n/locales/ko.ts

@@ -97,7 +97,7 @@ export const ko: Translations = {
     downloadFree: '무료 다운로드',
     getPro: 'Pro 구매',
     getProPlus: 'Pro+ 구매',
-    taxNote: '모든 가격은 세금 별도입니다. LemonSqueezy를 통한 안전한 결제.',
+    taxNote: '모든 가격은 세금 별도입니다. Payple를 통한 안전한 결제.',
     rows: [
       { feature: '음성 받아쓰기', free: '15회/일', pro: true, proPlus: true },
       { feature: 'AI 텍스트 다듬기', free: '3회/일', pro: true, proPlus: true },

site/src/i18n/locales/pt.ts

@@ -97,7 +97,7 @@ export const pt: Translations = {
     downloadFree: 'Baixar gratis',
     getPro: 'Obter Pro',
     getProPlus: 'Obter Pro+',
-    taxNote: 'Todos os precos excluem impostos. Pagamento seguro via LemonSqueezy.',
+    taxNote: 'Todos os precos excluem impostos. Pagamento seguro via Payple.',
     rows: [
       { feature: 'Ditado por voz', free: '15/dia', pro: true, proPlus: true },
       { feature: 'Polimento com IA', free: '3/dia', pro: true, proPlus: true },

site/src/i18n/locales/ru.ts

@@ -97,7 +97,7 @@ export const ru: Translations = {
     downloadFree: 'Скачать бесплатно',
     getPro: 'Получить Pro',
     getProPlus: 'Получить Pro+',
-    taxNote: 'Все цены без учета налогов. Безопасная оплата через LemonSqueezy.',
+    taxNote: 'Все цены без учета налогов. Безопасная оплата через Payple.',
     rows: [
       { feature: 'Голосовая диктовка', free: '15/день', pro: true, proPlus: true },
       { feature: 'ИИ-корректировка текста', free: '3/день', pro: true, proPlus: true },

site/src/i18n/locales/vi.ts

@@ -97,7 +97,7 @@ export const vi: Translations = {
     downloadFree: 'Tai mien phi',
     getPro: 'Mua Pro',
     getProPlus: 'Mua Pro+',
-    taxNote: 'Tat ca gia chua bao gom thue. Thanh toan an toan qua LemonSqueezy.',
+    taxNote: 'Tat ca gia chua bao gom thue. Thanh toan an toan qua Payple.',
     rows: [
       { feature: 'Chinh ta giong noi', free: '15/ngay', pro: true, proPlus: true },
       { feature: 'Tinh chinh van ban AI', free: '3/ngay', pro: true, proPlus: true },

site/src/i18n/locales/zh.ts

@@ -97,7 +97,7 @@ export const zh: Translations = {
     downloadFree: '免费下载',
     getPro: '获取 Pro',
     getProPlus: '获取 Pro+',
-    taxNote: '所有价格不含税。通过 LemonSqueezy 安全支付。',
+    taxNote: '所有价格不含税。通过 Payple 安全支付。',
     rows: [
       { feature: '语音听写', free: '15次/天', pro: true, proPlus: true },
       { feature: 'AI文本润色', free: '3次/天', pro: true, proPlus: true },