feat(creator-channel): 후원 탭 조회 서비스 보호 동작을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/creator/channel/donation/application/CreatorChannelDonationQueryService.kt

@@ -0,0 +1,20 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.donation.application
+
+import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.v2.creator.channel.donation.domain.CreatorChannelDonationTab
+import org.springframework.stereotype.Service
+import java.time.LocalDateTime
+
+@Service
+class CreatorChannelDonationQueryService {
+    fun getDonationTab(
+        creatorId: Long,
+        viewer: Member,
+        page: Int?,
+        size: Int?,
+        now: LocalDateTime
+    ): CreatorChannelDonationTab {
+        throw SodaException(messageKey = "common.error.invalid_request")
+    }
+}

src/test/kotlin/kr/co/vividnext/sodalive/v2/creator/channel/donation/application/CreatorChannelDonationQueryServiceTest.kt

@@ -0,0 +1,39 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.donation.application
+
+import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.member.MemberRole
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertThrows
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+import java.time.LocalDateTime
+
+class CreatorChannelDonationQueryServiceTest {
+    @Test
+    @DisplayName("후원 탭 query service placeholder는 내부 예외 대신 명시적인 API 오류를 던진다")
+    fun shouldThrowSodaExceptionUntilPhase2Implementation() {
+        val service = CreatorChannelDonationQueryService()
+
+        val exception = assertThrows(SodaException::class.java) {
+            service.getDonationTab(
+                creatorId = 1L,
+                viewer = createMember(id = 10L),
+                page = 0,
+                size = 20,
+                now = LocalDateTime.of(2026, 6, 22, 3, 0)
+            )
+        }
+
+        assertEquals("common.error.invalid_request", exception.messageKey)
+    }
+
+    private fun createMember(id: Long): Member {
+        return Member(
+            email = "viewer$id@test.com",
+            password = "password",
+            nickname = "viewer$id",
+            role = MemberRole.USER
+        ).apply { this.id = id }
+    }
+}