콘텐츠 메시지 다국어 처리

src/main/kotlin/kr/co/vividnext/sodalive/content/donation/AudioContentDonationController.kt

@@ -18,7 +18,7 @@ class AudioContentDonationController(private val service: AudioContentDonationSe
         @RequestBody request: AudioContentDonationRequest,
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
     ) = run {
-        if (member == null) throw SodaException("로그인 정보를 확인해주세요.")
+        if (member == null) throw SodaException(messageKey = "common.error.bad_credentials")
 
         ApiResponse.ok(service.donation(request = request, member = member))
     }

src/main/kotlin/kr/co/vividnext/sodalive/content/donation/AudioContentDonationService.kt

@@ -22,11 +22,11 @@ class AudioContentDonationService(
 ) {
     @Transactional
     fun donation(request: AudioContentDonationRequest, member: Member) {
-        if (request.donationCan < 1) throw SodaException("1캔 이상 후원하실 수 있습니다.")
-        if (request.comment.isBlank()) throw SodaException("함께 보낼 메시지를 입력하세요.")
+        if (request.donationCan < 1) throw SodaException(messageKey = "content.donation.error.minimum_can")
+        if (request.comment.isBlank()) throw SodaException(messageKey = "content.donation.error.comment_required")
 
         val audioContent = queryRepository.findByIdAndActive(request.contentId)
-            ?: throw SodaException("잘못된 콘텐츠 입니다.\n다시 시도해 주세요.")
+            ?: throw SodaException(messageKey = "content.error.invalid_content_retry")
 
         canPaymentService.spendCan(
             memberId = member.id!!,