feat(gift): 선물 도메인 상태값을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/gift/domain/GiftListType.kt

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+package kr.co.vividnext.sodalive.v2.gift.domain
+
+enum class GiftListType {
+    ALL,
+    SENT,
+    RECEIVED
+}
+
+enum class GiftDirection {
+    SENT,
+    RECEIVED
+}

src/main/kotlin/kr/co/vividnext/sodalive/v2/gift/domain/GiftSize.kt

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+package kr.co.vividnext.sodalive.v2.gift.domain
+
+enum class GiftSize(
+    val displayName: String,
+    val maxTotalLengthCm: Int,
+    val maxWeightKg: Int,
+    val defaultPriceCan: Int
+) {
+    SMALL("소형", 100, 5, 100),
+    MEDIUM("중형", 120, 15, 150),
+    LARGE("대형", 160, 20, 200)
+}

src/main/kotlin/kr/co/vividnext/sodalive/v2/gift/domain/GiftStatus.kt

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+package kr.co.vividnext.sodalive.v2.gift.domain
+
+enum class GiftStatus(val displayName: String) {
+    RECEIVED("접수 완료"),
+    TRACKING_REGISTERED("발송 확인"),
+    ARRIVED_AT_MAILBOX("사서함 도착"),
+    INSPECTION_COMPLETED("검수 완료"),
+    DELIVERED("전달 완료"),
+    UNDELIVERABLE("전달 불가"),
+    CANCELED("신청 취소")
+}

src/test/kotlin/kr/co/vividnext/sodalive/v2/gift/domain/GiftStatusTest.kt

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+package kr.co.vividnext.sodalive.v2.gift.domain
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+
+class GiftStatusTest {
+    @Test
+    @DisplayName("선물 상태 표시명은 한글 띄어쓰기를 통일한다")
+    fun shouldUseConsistentKoreanSpacingForDisplayNames() {
+        assertEquals("접수 완료", GiftStatus.RECEIVED.displayName)
+        assertEquals("발송 확인", GiftStatus.TRACKING_REGISTERED.displayName)
+        assertEquals("사서함 도착", GiftStatus.ARRIVED_AT_MAILBOX.displayName)
+        assertEquals("검수 완료", GiftStatus.INSPECTION_COMPLETED.displayName)
+        assertEquals("전달 완료", GiftStatus.DELIVERED.displayName)
+        assertEquals("전달 불가", GiftStatus.UNDELIVERABLE.displayName)
+        assertEquals("신청 취소", GiftStatus.CANCELED.displayName)
+    }
+}