diff --git a/.github/ci-expected-failures.json b/.github/ci-expected-failures.json
index 9972fcdee7..f931a54b1a 100644
--- a/.github/ci-expected-failures.json
+++ b/.github/ci-expected-failures.json
@@ -1,22 +1,6 @@
 {
   "schemaVersion": 1,
-  "unitTests": [
-    {
-      "task": ":feature:timeletter:data:testDebugUnitTest",
-      "className": "com.afternote.feature.timeletter.data.dto.TimeLetterDtoContractTest",
-      "tests": [
-        "발신 응답의 명시적 null과 빈 배열은 정상 파싱된다",
-        "발신 응답에는 존재하지 않는 deliveredAt 없이 정상 파싱된다",
-        "수신 응답의 기본값 제거 대상 키가 빠지면 실패한다",
-        "수신 응답의 조건부 null과 공개 전 빈 blocks는 정상 파싱된다"
-      ],
-      "issues": [
-        790,
-        873
-      ],
-      "reason": "타임레터 DTO 누락 키 계약 게이트 — 구현 머지 전까지 의도된 실패"
-    }
-  ],
+  "unitTests": [],
   "androidTests": [],
   "screenshotModules": []
 }
diff --git a/.github/scripts/ci-expected-failures.mjs b/.github/scripts/ci-expected-failures.mjs
index 97ef17bfef..70ad349e76 100644
--- a/.github/scripts/ci-expected-failures.mjs
+++ b/.github/scripts/ci-expected-failures.mjs
@@ -34,6 +34,11 @@ export function validateExpectedFailuresConfig(config) {
     if (!config || typeof config !== "object" || Array.isArray(config)) {
         throw new Error("기대 실패 목록 최상위 값은 객체여야 합니다.");
     }
+    // 파일이 사고로 `{}`(또는 다른 스키마)로 대체돼도 이후 루프는 빈 배열을 순회할 뿐이라
+    // 조용히 통과한다 — schemaVersion 을 강제해 "다 닫혀서 0건"과 "사고로 0건"을 구분한다.
+    if (config.schemaVersion !== 1) {
+        throw new Error(`지원하지 않는 기대 실패 목록 schemaVersion 입니다: ${config.schemaVersion}`);
+    }
     for (const [index, entry] of (config.unitTests ?? []).entries()) {
         const label = `unitTests[${index}]`;
         requireNonEmptyString(entry?.task, `${label}.task`);
diff --git a/.github/scripts/ci-expected-failures.test.mjs b/.github/scripts/ci-expected-failures.test.mjs
index 0dec8a3589..d7cced8530 100644
--- a/.github/scripts/ci-expected-failures.test.mjs
+++ b/.github/scripts/ci-expected-failures.test.mjs
@@ -81,29 +81,52 @@ test("저장소의 기대 실패 목록은 스키마를 지키고 추적 이슈
         assert.ok(entry.issues.length > 0);
         assert.ok(entry.reason.length > 0);
     }
-    assert.ok((config.unitTests?.length ?? 0) + (config.screenshotModules?.length ?? 0) > 0);
+    // 목록이 전부 비는 것 자체는 정상 상태다(모든 기대 실패 게이트가 닫힘) — 파일이 사고로
+    // 비워지는 사고는 schemaVersion 강제(아래 스키마 위반 테스트)가 잡는다.
 });
 
 test("스키마 위반은 로드 시점에 거부된다", () => {
     assert.throws(() => validateExpectedFailuresConfig(null), /객체여야/);
+    assert.throws(() => validateExpectedFailuresConfig({}), /schemaVersion/);
+    assert.throws(() => validateExpectedFailuresConfig({ schemaVersion: 2 }), /schemaVersion/);
     assert.throws(
-        () => validateExpectedFailuresConfig({ unitTests: [{ ...sampleConfig.unitTests[0], task: ":feature:x:assemble" }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                unitTests: [{ ...sampleConfig.unitTests[0], task: ":feature:x:assemble" }],
+            }),
         /testDebugUnitTest/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ unitTests: [{ ...sampleConfig.unitTests[0], tests: [] }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                unitTests: [{ ...sampleConfig.unitTests[0], tests: [] }],
+            }),
         /tests/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ unitTests: [{ ...sampleConfig.unitTests[0], issues: [] }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                unitTests: [{ ...sampleConfig.unitTests[0], issues: [] }],
+            }),
         /issues/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ screenshotModules: [{ module: "feature:setting", issues: [1], reason: "r" }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                screenshotModules: [{ module: "feature:setting", issues: [1], reason: "r" }],
+            }),
         /project path/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ screenshotModules: [{ module: ":feature:setting:presentation", issues: [1], reason: " " }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                screenshotModules: [{ module: ":feature:setting:presentation", issues: [1], reason: " " }],
+            }),
         /reason/,
     );
 });
@@ -243,19 +266,35 @@ test("기대 실패 목록·스크립트 변경은 full validation 을 강제한
 
 test("androidTest 스키마: FQCN·테스트 목록·추적 이슈가 강제된다", () => {
     assert.throws(
-        () => validateExpectedFailuresConfig({ androidTests: [{ ...sampleConfig.androidTests[0], className: "not a class" }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                androidTests: [{ ...sampleConfig.androidTests[0], className: "not a class" }],
+            }),
         /FQCN/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ androidTests: [{ ...sampleConfig.androidTests[0], tests: [] }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                androidTests: [{ ...sampleConfig.androidTests[0], tests: [] }],
+            }),
         /비어 있지 않은 배열/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ androidTests: [{ ...sampleConfig.androidTests[0], issues: [] }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                androidTests: [{ ...sampleConfig.androidTests[0], issues: [] }],
+            }),
         /추적 이슈/,
     );
     assert.throws(
-        () => validateExpectedFailuresConfig({ androidTests: [{ ...sampleConfig.androidTests[0], devices: [] }] }),
+        () =>
+            validateExpectedFailuresConfig({
+                schemaVersion: 1,
+                androidTests: [{ ...sampleConfig.androidTests[0], devices: [] }],
+            }),
         /비어 있지 않은 배열/,
     );
     assert.doesNotThrow(() => validateExpectedFailuresConfig(sampleConfig));
diff --git a/app/src/androidTest/java/com/afternote/afternote_fe/TimeLetterMindRecordCompletionAndroidTest.kt b/app/src/androidTest/java/com/afternote/afternote_fe/TimeLetterMindRecordCompletionAndroidTest.kt
index 6cc7a00690..90c7f7e36d 100644
--- a/app/src/androidTest/java/com/afternote/afternote_fe/TimeLetterMindRecordCompletionAndroidTest.kt
+++ b/app/src/androidTest/java/com/afternote/afternote_fe/TimeLetterMindRecordCompletionAndroidTest.kt
@@ -724,7 +724,6 @@ private fun completionCreatedLetter(call: FakeTimeLetterRepository.CreateCall):
         id = 901L,
         title = call.title,
         sendAt = call.sendAt,
-        deliveredAt = null,
         status = call.status,
         blocks = emptyList(),
         receiverIds = call.receiverIds,
@@ -751,7 +750,6 @@ private fun completionDetailLetter(): TimeLetter =
         id = 509L,
         title = "상세 route 편지",
         sendAt = "2026-10-09T09:40:00",
-        deliveredAt = null,
         status = TimeLetterStatus.SCHEDULED,
         blocks =
             listOf(
diff --git a/feature/timeletter/data/src/debug/kotlin/com/afternote/feature/timeletter/data/network/TimeLetterMockFixtures.kt b/feature/timeletter/data/src/debug/kotlin/com/afternote/feature/timeletter/data/network/TimeLetterMockFixtures.kt
index cb55152d90..a91290572e 100644
--- a/feature/timeletter/data/src/debug/kotlin/com/afternote/feature/timeletter/data/network/TimeLetterMockFixtures.kt
+++ b/feature/timeletter/data/src/debug/kotlin/com/afternote/feature/timeletter/data/network/TimeLetterMockFixtures.kt
@@ -5,8 +5,8 @@ internal object TimeLetterMockFixtures {
         """
         {"status":200,"code":0,"message":null,"data":{
           "timeLetters":[
-            {"id":1,"title":"미래의 나에게","sendAt":"2030-01-01T00:00:00","deliveredAt":null,"status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"지금 이 순간을 잊지 마."}],"receiverIds":[1]},
-            {"id":2,"title":"10년 후의 나에게","sendAt":"2035-06-15T00:00:00","deliveredAt":null,"status":"SCHEDULED","blocks":[{"id":2,"blockType":"TEXT","blockOrder":1,"textContent":"지금보다 더 행복하길 바라."}],"receiverIds":[2]}
+            {"id":1,"title":"미래의 나에게","sendAt":"2030-01-01T00:00:00","status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"지금 이 순간을 잊지 마.","url":null,"mimeType":null}],"receiverIds":[1]},
+            {"id":2,"title":"10년 후의 나에게","sendAt":"2035-06-15T00:00:00","status":"SCHEDULED","blocks":[{"id":2,"blockType":"TEXT","blockOrder":1,"textContent":"지금보다 더 행복하길 바라.","url":null,"mimeType":null}],"receiverIds":[2]}
           ],
           "totalCount":2
         }}
@@ -16,7 +16,7 @@ internal object TimeLetterMockFixtures {
         """
         {"status":200,"code":0,"message":null,"data":{
           "timeLetters":[
-            {"id":3,"title":"임시저장 레터","sendAt":null,"deliveredAt":null,"status":"DRAFT","blocks":[],"receiverIds":[]}
+            {"id":3,"title":"임시저장 레터","sendAt":null,"status":"DRAFT","blocks":[],"receiverIds":[]}
           ],
           "totalCount":1
         }}
@@ -24,12 +24,12 @@ internal object TimeLetterMockFixtures {
 
     val MOCK_CREATE_JSON =
         """
-        {"status":200,"code":0,"message":null,"data":{"id":99,"title":"새 타임레터","sendAt":null,"deliveredAt":null,"status":"DRAFT","blocks":[],"receiverIds":[]}}
+        {"status":200,"code":0,"message":null,"data":{"id":99,"title":"새 타임레터","sendAt":null,"status":"DRAFT","blocks":[],"receiverIds":[]}}
         """.trimIndent()
 
     val MOCK_UPDATE_JSON =
         """
-        {"status":200,"code":0,"message":null,"data":{"id":99,"title":"수정된 타임레터","sendAt":"2030-01-01T00:00:00","deliveredAt":null,"status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"수정된 내용"}],"receiverIds":[1]}}
+        {"status":200,"code":0,"message":null,"data":{"id":99,"title":"수정된 타임레터","sendAt":"2030-01-01T00:00:00","status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"수정된 내용","url":null,"mimeType":null}],"receiverIds":[1]}}
         """.trimIndent()
 
     val MOCK_DELETE_JSON =
@@ -39,6 +39,6 @@ internal object TimeLetterMockFixtures {
 
     fun detailJson(id: Long): String =
         """
-        {"status":200,"code":0,"message":null,"data":{"id":$id,"title":"타임레터 #$id","sendAt":"2030-01-01T00:00:00","deliveredAt":null,"status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"내용입니다."}],"receiverIds":[1]}}
+        {"status":200,"code":0,"message":null,"data":{"id":$id,"title":"타임레터 #$id","sendAt":"2030-01-01T00:00:00","status":"SCHEDULED","blocks":[{"id":1,"blockType":"TEXT","blockOrder":1,"textContent":"내용입니다.","url":null,"mimeType":null}],"receiverIds":[1]}}
         """.trimIndent()
 }
diff --git a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/ReceivedTimeLetterDto.kt b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/ReceivedTimeLetterDto.kt
index a89774872c..f206ad1e6f 100644
--- a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/ReceivedTimeLetterDto.kt
+++ b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/ReceivedTimeLetterDto.kt
@@ -7,14 +7,15 @@ import kotlinx.serialization.Serializable
 data class ReceivedTimeLetterDto(
     @SerialName("id") val id: Long,
     @SerialName("timeLetterReceiverId") val timeLetterReceiverId: Long,
-    @SerialName("title") val title: String? = null,
-    @SerialName("blocks") val blocks: List<TimeLetterBlockDto> = emptyList(),
-    @SerialName("sendAt") val sendAt: String? = null,
+    @SerialName("title") val title: String?,
+    @SerialName("blocks") val blocks: List<TimeLetterBlockDto>,
+    @SerialName("sendAt") val sendAt: String?,
     @SerialName("status") val status: TimeLetterStatusDto,
-    @SerialName("senderName") val senderName: String? = null,
-    @SerialName("deliveredAt") val deliveredAt: String? = null,
-    @SerialName("createdAt") val createdAt: String? = null,
-    @SerialName("isRead") val isRead: Boolean,
+    @SerialName("senderName") val senderName: String?,
+    @SerialName("deliveredAt") val deliveredAt: String?,
+    @SerialName("createdAt") val createdAt: String?,
+    // 공개 전 미리보기에선 읽음 여부가 아직 정해지지 않아 서버가 명시적 null을 보낼 수 있다(#790).
+    @SerialName("isRead") val isRead: Boolean?,
 )
 
 @Serializable
diff --git a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/TimeLetterDto.kt b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/TimeLetterDto.kt
index 7cb0c18803..7264cad0e2 100644
--- a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/TimeLetterDto.kt
+++ b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/dto/TimeLetterDto.kt
@@ -85,12 +85,13 @@ data class TimeLetterDeleteRequestDto(
     @SerialName("timeLetterIds") val timeLetterIds: List<Long>,
 )
 
+// deliveredAt 필드가 없다 — TimeLetterResponse(발신 응답) 계약엔 이 키가 아예 없다(#790).
+// 배달 시각은 ReceivedTimeLetterDto 쪽(수신 응답)에만 존재한다.
 @Serializable
 data class TimeLetterDto(
     @SerialName("id") val id: Long,
     @SerialName("title") val title: String?,
     @SerialName("sendAt") val sendAt: String?,
-    @SerialName("deliveredAt") val deliveredAt: String?,
     @SerialName("status") val status: TimeLetterStatusDto,
     @SerialName("blocks") val blocks: List<TimeLetterBlockDto>,
     @SerialName("receiverIds") val receiverIds: List<Long>,
diff --git a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/ReceivedTimeLetterMapper.kt b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/ReceivedTimeLetterMapper.kt
index 7c5a756beb..2a50034692 100644
--- a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/ReceivedTimeLetterMapper.kt
+++ b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/ReceivedTimeLetterMapper.kt
@@ -16,7 +16,9 @@ fun ReceivedTimeLetterDto.toDomain(): ReceivedTimeLetter =
         senderName = senderName,
         deliveredAt = deliveredAt,
         createdAt = createdAt,
-        isRead = isRead,
+        // 공개 전엔 서버가 isRead를 null로 보낼 수 있다 — 도메인은 non-null 계약이라 미확정 상태를
+        // 안전한 쪽(false=안 읽음)으로 접어 화면이 잘못 "읽음"으로 표시되지 않게 한다.
+        isRead = isRead ?: false,
     )
 
 fun ReceivedTimeLetterListDto.toDomain(): ReceivedTimeLetterList =
diff --git a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/TimeLetterMapper.kt b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/TimeLetterMapper.kt
index 24b6a37ce3..dba509e940 100644
--- a/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/TimeLetterMapper.kt
+++ b/feature/timeletter/data/src/main/kotlin/com/afternote/feature/timeletter/data/mapper/TimeLetterMapper.kt
@@ -59,7 +59,6 @@ fun TimeLetterDto.toDomain(): TimeLetter =
         id = id,
         title = title,
         sendAt = sendAt,
-        deliveredAt = deliveredAt,
         status = status.toDomain(),
         blocks = blocks.map { it.toDomain() },
         receiverIds = receiverIds,
diff --git a/feature/timeletter/domain/src/main/kotlin/com/afternote/feature/timeletter/domain/model/TimeLetterModel.kt b/feature/timeletter/domain/src/main/kotlin/com/afternote/feature/timeletter/domain/model/TimeLetterModel.kt
index 271f1210e3..b3b302e92b 100644
--- a/feature/timeletter/domain/src/main/kotlin/com/afternote/feature/timeletter/domain/model/TimeLetterModel.kt
+++ b/feature/timeletter/domain/src/main/kotlin/com/afternote/feature/timeletter/domain/model/TimeLetterModel.kt
@@ -4,7 +4,6 @@ data class TimeLetter(
     val id: Long,
     val title: String?,
     val sendAt: String?,
-    val deliveredAt: String?,
     val status: TimeLetterStatus,
     val blocks: List<TimeLetterBlock>,
     val receiverIds: List<Long>,
diff --git a/feature/timeletter/domain/src/test/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepositoryTest.kt b/feature/timeletter/domain/src/test/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepositoryTest.kt
index 935aa8c3f3..8de26bc64f 100644
--- a/feature/timeletter/domain/src/test/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepositoryTest.kt
+++ b/feature/timeletter/domain/src/test/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepositoryTest.kt
@@ -54,7 +54,6 @@ class FakeTimeLetterRepositoryTest {
             id = 1L,
             title = "편지",
             sendAt = null,
-            deliveredAt = null,
             status = status,
             blocks = emptyList(),
             receiverIds = listOf(7L),
diff --git a/feature/timeletter/domain/src/testFixtures/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepository.kt b/feature/timeletter/domain/src/testFixtures/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepository.kt
index 1055a4f0f0..5ef38106b4 100644
--- a/feature/timeletter/domain/src/testFixtures/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepository.kt
+++ b/feature/timeletter/domain/src/testFixtures/kotlin/com/afternote/feature/timeletter/domain/testing/FakeTimeLetterRepository.kt
@@ -115,7 +115,6 @@ class FakeTimeLetterRepository(
                 id = id,
                 title = title,
                 sendAt = sendAt,
-                deliveredAt = null,
                 status = status,
                 blocks = blocks.mapIndexed { index, block -> block.toStoredBlock(id, index) },
                 receiverIds = receiverIds,
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/DraftLetterItem.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/DraftLetterItem.kt
index faef0f9d61..71e95357c2 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/DraftLetterItem.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/DraftLetterItem.kt
@@ -129,7 +129,6 @@ private fun DraftLetterItemPreview() {
                 id = 1L,
                 title = "미래의 나에게",
                 sendAt = "2026-12-31T00:00:00",
-                deliveredAt = null,
                 status = TimeLetterStatus.DRAFT,
                 blocks = emptyList(),
                 receiverIds = listOf(1L),
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterBlockItem.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterBlockItem.kt
index 554fd5cd0c..a0d2781030 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterBlockItem.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterBlockItem.kt
@@ -148,7 +148,6 @@ private fun TimeLetterBlockItemPrev() {
                 id = 1L,
                 title = "미래의 나에게",
                 sendAt = "2026-12-31T00:00:00",
-                deliveredAt = null,
                 status = TimeLetterStatus.SCHEDULED,
                 blocks = emptyList(),
                 receiverIds = listOf(1L),
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterContent.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterContent.kt
index 5d84fa96ab..7c87447179 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterContent.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeLetterContent.kt
@@ -151,7 +151,6 @@ private val previewLetters =
                     id = 1L,
                     title = "미래의 나에게",
                     sendAt = "2026-12-31T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(1L),
@@ -160,7 +159,6 @@ private val previewLetters =
                     id = 2L,
                     title = "10년 후의 나에게",
                     sendAt = "2035-01-01T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(2L),
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeletterListItem.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeletterListItem.kt
index 475e8da43c..f0e0472bc6 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeletterListItem.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/component/TimeletterListItem.kt
@@ -141,7 +141,6 @@ private fun TimeLetterItemPreview() {
                 id = 1L,
                 title = "미래의 나에게",
                 sendAt = "2026-12-31T00:00:00",
-                deliveredAt = null,
                 status = TimeLetterStatus.SCHEDULED,
                 blocks = emptyList(),
                 receiverIds = listOf(1L),
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/recipient/RecipientTimeletterScreen.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/recipient/RecipientTimeletterScreen.kt
index 17520ffb1a..d972931609 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/recipient/RecipientTimeletterScreen.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/recipient/RecipientTimeletterScreen.kt
@@ -228,7 +228,6 @@ private fun ReceivedTimeLetter.toTimeLetter() =
         id = id,
         title = title,
         sendAt = deliveredAt,
-        deliveredAt = deliveredAt,
         status = status,
         blocks = blocks,
         receiverIds = listOf(id),
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/DraftLetterScreen.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/DraftLetterScreen.kt
index 46e3af064a..1eca58253b 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/DraftLetterScreen.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/DraftLetterScreen.kt
@@ -194,8 +194,30 @@ private fun DraftLetterScreenPreview() {
             DraftLetterUiState.Success(
                 drafts =
                     listOf(
-                        TimeLetter(1L, "첫 번째 레터", "2026-12-25T00:00:00", null, TimeLetterStatus.DRAFT, emptyList(), listOf(1L)),
-                        TimeLetter(2L, "두 번째 레터", null, null, TimeLetterStatus.DRAFT, emptyList(), listOf(2L)),
+                        TimeLetter(
+                            id = 1L,
+                            title = "첫 번째 레터",
+                            sendAt = "2026-12-25T00:00:00",
+                            status = TimeLetterStatus.DRAFT,
+                            blocks = emptyList(),
+                            receiverIds = listOf(1L),
+                        ),
+                        TimeLetter(
+                            id = 2L,
+                            title = "두 번째 레터",
+                            sendAt = "2026-06-01T00:00:00",
+                            status = TimeLetterStatus.DRAFT,
+                            blocks = emptyList(),
+                            receiverIds = listOf(2L),
+                        ),
+                        TimeLetter(
+                            id = 3L,
+                            title = null,
+                            sendAt = null,
+                            status = TimeLetterStatus.DRAFT,
+                            blocks = emptyList(),
+                            receiverIds = emptyList(),
+                        ),
                     ),
                 receiverNameMap = mapOf(1L to "김지은", 2L to "이현우"),
             ),
@@ -207,3 +229,40 @@ private fun DraftLetterScreenPreview() {
         onDeleteSelected = {},
     )
 }
+
+@Preview(showBackground = true, name = "수정 모드 - 항목 선택됨")
+@Composable
+private fun DraftLetterScreenEditModePreview() {
+    DraftLetterContent(
+        uiState =
+            DraftLetterUiState.Success(
+                drafts =
+                    listOf(
+                        TimeLetter(
+                            id = 1L,
+                            title = "첫 번째 레터",
+                            sendAt = "2026-12-25T00:00:00",
+                            status = TimeLetterStatus.DRAFT,
+                            blocks = emptyList(),
+                            receiverIds = listOf(1L),
+                        ),
+                        TimeLetter(
+                            id = 2L,
+                            title = "두 번째 레터",
+                            sendAt = "2026-06-01T00:00:00",
+                            status = TimeLetterStatus.DRAFT,
+                            blocks = emptyList(),
+                            receiverIds = listOf(2L),
+                        ),
+                    ),
+                isEditMode = true,
+                selectedIds = setOf(1L),
+            ),
+        onBackClick = {},
+        onOpenDraft = {},
+        onEditCompleteClick = {},
+        onToggleSelection = {},
+        onDeleteAll = {},
+        onDeleteSelected = {},
+    )
+}
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeLetterDetailScreen.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeLetterDetailScreen.kt
index 6718339c00..459968a06b 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeLetterDetailScreen.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeLetterDetailScreen.kt
@@ -284,7 +284,6 @@ private fun TimeLetterDetailScreenPrev() {
                 id = 1L,
                 title = "미래의 나에게",
                 sendAt = "2026-12-31T00:00:00",
-                deliveredAt = null,
                 status = TimeLetterStatus.SCHEDULED,
                 blocks =
                     listOf(
diff --git a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreen.kt b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreen.kt
index 228f09a694..e4bede3e23 100644
--- a/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreen.kt
+++ b/feature/timeletter/presentation/src/main/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreen.kt
@@ -98,7 +98,6 @@ private val previewLetters =
                     id = 1L,
                     title = "미래의 나에게",
                     sendAt = "2026-12-31T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(1L),
@@ -107,7 +106,6 @@ private val previewLetters =
                     id = 2L,
                     title = "10년 후의 나에게",
                     sendAt = "2035-01-01T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(2L),
diff --git a/feature/timeletter/presentation/src/screenshotTest/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreenScreenshotTest.kt b/feature/timeletter/presentation/src/screenshotTest/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreenScreenshotTest.kt
index 8cfb978a22..668bda0ad5 100644
--- a/feature/timeletter/presentation/src/screenshotTest/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreenScreenshotTest.kt
+++ b/feature/timeletter/presentation/src/screenshotTest/kotlin/com/afternote/feature/timeletter/presentation/screen/sender/TimeletterScreenScreenshotTest.kt
@@ -86,7 +86,6 @@ private val previewLetters =
                     id = 1L,
                     title = "미래의 나에게",
                     sendAt = "2026-12-31T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(1L),
@@ -95,7 +94,6 @@ private val previewLetters =
                     id = 2L,
                     title = "10년 후의 나에게",
                     sendAt = "2035-01-01T00:00:00",
-                    deliveredAt = null,
                     status = TimeLetterStatus.SCHEDULED,
                     blocks = emptyList(),
                     receiverIds = listOf(2L),
diff --git a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterFlowTest.kt b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterFlowTest.kt
index 0e8b2100bf..8db52aeee4 100644
--- a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterFlowTest.kt
+++ b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterFlowTest.kt
@@ -74,7 +74,6 @@ class TimeLetterFlowTest {
                 id = 1L,
                 title = call.title,
                 sendAt = call.sendAt,
-                deliveredAt = null,
                 status = call.status,
                 blocks = emptyList(),
                 receiverIds = call.receiverIds,
diff --git a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterLifecycleTest.kt b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterLifecycleTest.kt
index ce5ca0c119..35fe45a17f 100644
--- a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterLifecycleTest.kt
+++ b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/TimeLetterLifecycleTest.kt
@@ -587,7 +587,6 @@ private fun timeLetter(
         id = id,
         title = title,
         sendAt = sendAt,
-        deliveredAt = null,
         status = status,
         blocks = blocks,
         receiverIds = receiverIds,
diff --git a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/DraftLetterViewModelTest.kt b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/DraftLetterViewModelTest.kt
index 375d1c5cd5..43a2e86603 100644
--- a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/DraftLetterViewModelTest.kt
+++ b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/DraftLetterViewModelTest.kt
@@ -176,7 +176,6 @@ class DraftLetterViewModelTest {
                             id = 1L,
                             title = "draft",
                             sendAt = null,
-                            deliveredAt = null,
                             status = TimeLetterStatus.DRAFT,
                             blocks = emptyList(),
                             receiverIds = listOf(1L),
diff --git a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeLetterWriteViewModelTest.kt b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeLetterWriteViewModelTest.kt
index d62a1254e9..c9d58600c2 100644
--- a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeLetterWriteViewModelTest.kt
+++ b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeLetterWriteViewModelTest.kt
@@ -213,7 +213,6 @@ class TimeLetterWriteViewModelTest {
             id = 10L,
             title = "existing title",
             sendAt = "2026-08-29T19:30:00",
-            deliveredAt = null,
             status = status,
             blocks = emptyList(),
             receiverIds = listOf(1L),
diff --git a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeletterViewModelTest.kt b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeletterViewModelTest.kt
index d1f54f36dc..c144434c64 100644
--- a/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeletterViewModelTest.kt
+++ b/feature/timeletter/presentation/src/test/kotlin/com/afternote/feature/timeletter/presentation/viewmodel/TimeletterViewModelTest.kt
@@ -137,7 +137,6 @@ class TimeletterViewModelTest {
                             id = 1L,
                             title = "제목",
                             sendAt = null,
-                            deliveredAt = null,
                             status = TimeLetterStatus.SCHEDULED,
                             blocks = emptyList(),
                             receiverIds = emptyList(),