From 79047b54888c470ef9c2a61c82521e394901451b Mon Sep 17 00:00:00 2001
From: nanxun <nanxun@nxsir.cn>
Date: Sun, 26 Apr 2026 11:03:08 +0800
Subject: [PATCH] feat: add recovery center and daily reviews

---
 frontend/src/components/layout/MainLayout.vue |   4 +-
 frontend/src/views/DailyReviewsView.vue       |   6 +-
 frontend/src/views/RecoveryView.vue           |   6 +-
 .../IWebhookNotificationService.cs            |  21 +
 .../Persistence/PersistenceContracts.cs       |   2 +
 .../Scripting/IEventScriptService.cs          |   6 +-
 .../Common/AutoStartDecisionCodes.cs          |  16 +
 .../Models/LiveRooms/LiveRoomModels.cs        |   8 +
 .../Models/RecordTasks/RecordSessionModels.cs |  72 ++
 .../Models/Recovery/RecoveryModels.cs         |  88 ++
 .../Models/Reports/DailyReviewModels.cs       | 126 +++
 .../Models/Settings/SettingsModels.cs         |  95 +++
 .../Services/LiveRoomService.cs               |  13 +
 .../Services/LiveRoomStatusService.cs         |   4 +
 .../Services/RecordService.cs                 | 171 +++-
 .../Services/RecordSessionService.cs          |  21 +-
 .../Services/SessionAnalyticsService.cs       | 805 ++++++++++++++++++
 .../Services/SystemSettingsService.cs         |  27 +
 src/LiveRecorder.Domain/Entities/LiveRoom.cs  |  20 +
 .../Persistence/DatabaseInitializer.cs        |  13 +
 .../Persistence/LiveRecorderDbContext.cs      |   3 +
 .../Persistence/Repositories/Repositories.cs  |   3 +
 .../Services/EventScriptService.cs            | 330 ++++++-
 .../Services/FfmpegService.Runtime.cs         |   7 +
 .../LiveRoomPollingBackgroundService.cs       |  63 ++
 .../Services/RecoveryService.cs               | 437 ++++++++++
 .../RetentionCleanupBackgroundService.cs      |  76 ++
 .../Services/RetentionCleanupService.cs       | 283 ++++++
 .../Services/WebhookNotificationService.cs    | 337 ++++++++
 .../Controllers/RecoveryController.cs         |  37 +
 .../Controllers/ReportsController.cs          |  33 +
 .../Controllers/SettingsController.cs         |  29 +-
 src/LiveRecorder.WebApi/Program.cs            |   5 +
 33 files changed, 3127 insertions(+), 40 deletions(-)
 create mode 100644 src/LiveRecorder.Application/Abstractions/Notifications/IWebhookNotificationService.cs
 create mode 100644 src/LiveRecorder.Application/Common/AutoStartDecisionCodes.cs
 create mode 100644 src/LiveRecorder.Application/Models/Recovery/RecoveryModels.cs
 create mode 100644 src/LiveRecorder.Application/Models/Reports/DailyReviewModels.cs
 create mode 100644 src/LiveRecorder.Application/Services/SessionAnalyticsService.cs
 create mode 100644 src/LiveRecorder.Infrastructure/Services/RecoveryService.cs
 create mode 100644 src/LiveRecorder.Infrastructure/Services/RetentionCleanupBackgroundService.cs
 create mode 100644 src/LiveRecorder.Infrastructure/Services/RetentionCleanupService.cs
 create mode 100644 src/LiveRecorder.Infrastructure/Services/WebhookNotificationService.cs
 create mode 100644 src/LiveRecorder.WebApi/Controllers/RecoveryController.cs
 create mode 100644 src/LiveRecorder.WebApi/Controllers/ReportsController.cs

diff --git a/frontend/src/components/layout/MainLayout.vue b/frontend/src/components/layout/MainLayout.vue
index 62f8b5a..f9bdf7d 100644
--- a/frontend/src/components/layout/MainLayout.vue
+++ b/frontend/src/components/layout/MainLayout.vue
@@ -263,8 +263,8 @@ async function handleLogout() {
             />
             <div class="app-topbar__copy">
               <div class="app-topbar__eyebrow">Control Room</div>
-              <div class="app-topbar__title">{{ pageMeta.title }}</div>
-              <div class="app-topbar__subtitle">{{ pageMeta.subtitle }}</div>
+              <div class="app-topbar__title">Live Recorder</div>
+              <div class="app-topbar__subtitle">专业直播录制运维控制台</div>
             </div>
           </div>
 
diff --git a/frontend/src/views/DailyReviewsView.vue b/frontend/src/views/DailyReviewsView.vue
index 3213ad5..0cd9dd1 100644
--- a/frontend/src/views/DailyReviewsView.vue
+++ b/frontend/src/views/DailyReviewsView.vue
@@ -2,6 +2,7 @@
 import { computed, onMounted, ref } from "vue";
 import { useRouter } from "vue-router";
 import { useViewport } from "@/composables/useViewport";
+import axios from "axios";
 import apiClient, { getApiErrorMessage } from "@/api/client";
 import type { DailyReviewReport } from "@/types";
 
@@ -28,7 +29,10 @@ async function loadReport() {
     });
     report.value = data;
   } catch (error) {
-    loadError.value = getApiErrorMessage(error, "回顾日报加载失败，请稍后重试。");
+    loadError.value =
+      axios.isAxiosError(error) && error.response?.status === 404
+        ? "当前后端还没有部署回顾日报接口。请先同步更新并重启后端，再打开这个页面。"
+        : getApiErrorMessage(error, "回顾日报加载失败，请稍后重试。");
   } finally {
     loading.value = false;
   }
diff --git a/frontend/src/views/RecoveryView.vue b/frontend/src/views/RecoveryView.vue
index 673c9e6..eef1a62 100644
--- a/frontend/src/views/RecoveryView.vue
+++ b/frontend/src/views/RecoveryView.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { computed, onMounted, ref } from "vue";
 import { ElMessage } from "element-plus";
+import axios from "axios";
 import apiClient, { getApiErrorMessage } from "@/api/client";
 import { useViewport } from "@/composables/useViewport";
 import type {
@@ -31,7 +32,10 @@ async function loadOverview() {
     const { data } = await apiClient.get<RecoveryOverview>("/recovery");
     overview.value = data;
   } catch (error) {
-    loadError.value = getApiErrorMessage(error, "恢复中心加载失败，请稍后重试。");
+    loadError.value =
+      axios.isAxiosError(error) && error.response?.status === 404
+        ? "当前后端还没有部署恢复中心接口。请先同步更新并重启后端，再打开这个页面。"
+        : getApiErrorMessage(error, "恢复中心加载失败，请稍后重试。");
   } finally {
     loading.value = false;
   }
diff --git a/src/LiveRecorder.Application/Abstractions/Notifications/IWebhookNotificationService.cs b/src/LiveRecorder.Application/Abstractions/Notifications/IWebhookNotificationService.cs
new file mode 100644
index 0000000..60015fb
--- /dev/null
+++ b/src/LiveRecorder.Application/Abstractions/Notifications/IWebhookNotificationService.cs
@@ -0,0 +1,21 @@
+using LiveRecorder.Application.Models.Settings;
+using LiveRecorder.Domain.Entities;
+
+namespace LiveRecorder.Application.Abstractions.Notifications;
+
+public interface IWebhookNotificationService
+{
+    Task SendLiveStartedAsync(LiveRoom liveRoom, CancellationToken cancellationToken = default);
+
+    Task SendExceptionAsync(
+        string source,
+        string summary,
+        string? detail = null,
+        LiveRoom? liveRoom = null,
+        RecordTask? recordTask = null,
+        CancellationToken cancellationToken = default);
+
+    Task<WebhookTestResultDto> SendTestAsync(
+        SendTestWebhookRequest request,
+        CancellationToken cancellationToken = default);
+}
diff --git a/src/LiveRecorder.Application/Abstractions/Persistence/PersistenceContracts.cs b/src/LiveRecorder.Application/Abstractions/Persistence/PersistenceContracts.cs
index 6b2c643..c4308e4 100644
--- a/src/LiveRecorder.Application/Abstractions/Persistence/PersistenceContracts.cs
+++ b/src/LiveRecorder.Application/Abstractions/Persistence/PersistenceContracts.cs
@@ -79,6 +79,8 @@ public interface ISystemLogRepository
 {
     Task AddAsync(SystemLogEntry entry, CancellationToken cancellationToken = default);
 
+    Task<IReadOnlyList<SystemLogEntry>> ListAllAsync(CancellationToken cancellationToken = default);
+
     Task<IReadOnlyList<SystemLogEntry>> ListByRecordTaskIdsAsync(
         IReadOnlyCollection<Guid> recordTaskIds,
         CancellationToken cancellationToken = default);
diff --git a/src/LiveRecorder.Application/Abstractions/Scripting/IEventScriptService.cs b/src/LiveRecorder.Application/Abstractions/Scripting/IEventScriptService.cs
index ba15389..6eedff4 100644
--- a/src/LiveRecorder.Application/Abstractions/Scripting/IEventScriptService.cs
+++ b/src/LiveRecorder.Application/Abstractions/Scripting/IEventScriptService.cs
@@ -1,4 +1,5 @@
 using LiveRecorder.Domain.Entities;
+using LiveRecorder.Application.Models.Settings;
 
 namespace LiveRecorder.Application.Abstractions.Scripting;
 
@@ -16,5 +17,8 @@ public interface IEventScriptService
         string segmentFilePath,
         DateTimeOffset occurredAt,
         CancellationToken cancellationToken = default);
-}
 
+    Task<EventScriptTestResultDto> TestAsync(
+        TestEventScriptRequest request,
+        CancellationToken cancellationToken = default);
+}
diff --git a/src/LiveRecorder.Application/Common/AutoStartDecisionCodes.cs b/src/LiveRecorder.Application/Common/AutoStartDecisionCodes.cs
new file mode 100644
index 0000000..41309ea
--- /dev/null
+++ b/src/LiveRecorder.Application/Common/AutoStartDecisionCodes.cs
@@ -0,0 +1,16 @@
+namespace LiveRecorder.Application.Common;
+
+public static class AutoStartDecisionCodes
+{
+    public const string Started = "started";
+
+    public const string SkippedDisabled = "skipped_disabled";
+
+    public const string SkippedStorage = "skipped_storage";
+
+    public const string SkippedActiveSession = "skipped_active_session";
+
+    public const string SkippedOffline = "skipped_offline";
+
+    public const string FailedStartup = "failed_startup";
+}
diff --git a/src/LiveRecorder.Application/Models/LiveRooms/LiveRoomModels.cs b/src/LiveRecorder.Application/Models/LiveRooms/LiveRoomModels.cs
index f0c42b8..361161e 100644
--- a/src/LiveRecorder.Application/Models/LiveRooms/LiveRoomModels.cs
+++ b/src/LiveRecorder.Application/Models/LiveRooms/LiveRoomModels.cs
@@ -116,6 +116,14 @@ public sealed class LiveRoomDto
 
     public required LiveRoomAvailabilityStatus AvailabilityStatus { get; init; }
 
+    public string? LastAutoStartDecisionCode { get; init; }
+
+    public string? LastAutoStartDecisionSummary { get; init; }
+
+    public string? LastAutoStartDecisionDetail { get; init; }
+
+    public DateTimeOffset? LastAutoStartDecisionAt { get; init; }
+
     public DateTimeOffset? LastCheckedAt { get; init; }
 
     public DateTimeOffset CreatedAt { get; init; }
diff --git a/src/LiveRecorder.Application/Models/RecordTasks/RecordSessionModels.cs b/src/LiveRecorder.Application/Models/RecordTasks/RecordSessionModels.cs
index f9f0011..0fe2dd4 100644
--- a/src/LiveRecorder.Application/Models/RecordTasks/RecordSessionModels.cs
+++ b/src/LiveRecorder.Application/Models/RecordTasks/RecordSessionModels.cs
@@ -48,9 +48,81 @@ public sealed class RecordSessionDetailDto
 {
     public required RecordSessionDto Session { get; init; }
 
+    public required RecordSessionTimelineDto Timeline { get; init; }
+
     public required IReadOnlyList<SystemLogDto> Logs { get; init; }
 }
 
+public sealed class RecordSessionTimelineDto
+{
+    public DateTimeOffset AnchorAt { get; init; }
+
+    public double TotalDurationSeconds { get; init; }
+
+    public required IReadOnlyList<RecordSessionTimelineSegmentDto> Segments { get; init; }
+
+    public required IReadOnlyList<RecordSessionTimelineEventDto> Events { get; init; }
+
+    public required IReadOnlyList<RecordSessionHeatBucketDto> HeatBuckets { get; init; }
+}
+
+public sealed class RecordSessionTimelineSegmentDto
+{
+    public Guid RecordTaskId { get; init; }
+
+    public int SegmentIndex { get; init; }
+
+    public required RecordTaskStatus Status { get; init; }
+
+    public DateTimeOffset StartedAt { get; init; }
+
+    public DateTimeOffset EndedAt { get; init; }
+
+    public double OffsetSeconds { get; init; }
+
+    public double DurationSeconds { get; init; }
+
+    public string? Label { get; init; }
+
+    public string? Detail { get; init; }
+}
+
+public sealed class RecordSessionTimelineEventDto
+{
+    public required string Id { get; init; }
+
+    public required string Layer { get; init; }
+
+    public required string Title { get; init; }
+
+    public string? Detail { get; init; }
+
+    public Guid? RecordTaskId { get; init; }
+
+    public int? SegmentIndex { get; init; }
+
+    public SystemLogLevel? Level { get; init; }
+
+    public DateTimeOffset OccurredAt { get; init; }
+
+    public double OffsetSeconds { get; init; }
+}
+
+public sealed class RecordSessionHeatBucketDto
+{
+    public Guid RecordTaskId { get; init; }
+
+    public int SegmentIndex { get; init; }
+
+    public DateTimeOffset BucketStartedAt { get; init; }
+
+    public double OffsetSeconds { get; init; }
+
+    public double DurationSeconds { get; init; }
+
+    public int MessageCount { get; init; }
+}
+
 public sealed class DeleteRecordSessionsRequest
 {
     public IReadOnlyList<Guid> SessionIds { get; set; } = [];
diff --git a/src/LiveRecorder.Application/Models/Recovery/RecoveryModels.cs b/src/LiveRecorder.Application/Models/Recovery/RecoveryModels.cs
new file mode 100644
index 0000000..4e4efc4
--- /dev/null
+++ b/src/LiveRecorder.Application/Models/Recovery/RecoveryModels.cs
@@ -0,0 +1,88 @@
+using LiveRecorder.Domain.Enums;
+
+namespace LiveRecorder.Application.Models.Recovery;
+
+public sealed class RecoveryOverviewDto
+{
+    public required StorageGuardStatusDto Storage { get; init; }
+
+    public required IReadOnlyList<RecoverableLiveRoomDto> LiveRooms { get; init; }
+
+    public required IReadOnlyList<RecoverableFinalizationDto> Finalizations { get; init; }
+}
+
+public sealed class StorageGuardStatusDto
+{
+    public bool IsEnabled { get; init; }
+
+    public bool HasEnoughSpace { get; init; }
+
+    public required string CheckedPath { get; init; }
+
+    public long AvailableBytes { get; init; }
+
+    public long RequiredBytes { get; init; }
+
+    public required string Message { get; init; }
+}
+
+public sealed class RecoverableLiveRoomDto
+{
+    public Guid LiveRoomId { get; init; }
+
+    public required string PlatformName { get; init; }
+
+    public required string RoomId { get; init; }
+
+    public string? Title { get; init; }
+
+    public string? AnchorName { get; init; }
+
+    public string? LastAutoStartDecisionCode { get; init; }
+
+    public string? LastAutoStartDecisionSummary { get; init; }
+
+    public string? LastAutoStartDecisionDetail { get; init; }
+
+    public DateTimeOffset? LastAutoStartDecisionAt { get; init; }
+
+    public DateTimeOffset? LastCheckedAt { get; init; }
+}
+
+public sealed class RecoverableFinalizationDto
+{
+    public Guid RecordTaskId { get; init; }
+
+    public Guid RecordSessionId { get; init; }
+
+    public Guid LiveRoomId { get; init; }
+
+    public required string LiveRoomTitle { get; init; }
+
+    public required string RoomId { get; init; }
+
+    public required string PlatformName { get; init; }
+
+    public int SegmentIndex { get; init; }
+
+    public required RecordTaskStatus Status { get; init; }
+
+    public string? OutputFilePath { get; init; }
+
+    public string? Reason { get; init; }
+
+    public DateTimeOffset CreatedAt { get; init; }
+
+    public DateTimeOffset? EndedAt { get; init; }
+}
+
+public sealed class RecoveryActionResultDto
+{
+    public int RequestedCount { get; init; }
+
+    public int SuccessCount { get; init; }
+
+    public int FailedCount { get; init; }
+
+    public required IReadOnlyList<string> Messages { get; init; }
+}
diff --git a/src/LiveRecorder.Application/Models/Reports/DailyReviewModels.cs b/src/LiveRecorder.Application/Models/Reports/DailyReviewModels.cs
new file mode 100644
index 0000000..f40c18b
--- /dev/null
+++ b/src/LiveRecorder.Application/Models/Reports/DailyReviewModels.cs
@@ -0,0 +1,126 @@
+using LiveRecorder.Domain.Enums;
+
+namespace LiveRecorder.Application.Models.Reports;
+
+public sealed class DailyReviewReportDto
+{
+    public required string Date { get; init; }
+
+    public int UtcOffsetMinutes { get; init; }
+
+    public DateTimeOffset WindowStartUtc { get; init; }
+
+    public DateTimeOffset WindowEndUtc { get; init; }
+
+    public required DailyReviewSummaryDto Summary { get; init; }
+
+    public required IReadOnlyList<DailyReviewRoomDto> Rooms { get; init; }
+
+    public required IReadOnlyList<DailyReviewSessionHighlightDto> Highlights { get; init; }
+
+    public required IReadOnlyList<DailyReviewMomentDto> Moments { get; init; }
+}
+
+public sealed class DailyReviewSummaryDto
+{
+    public int ActiveLiveRoomCount { get; init; }
+
+    public int SessionCount { get; init; }
+
+    public int SegmentCount { get; init; }
+
+    public double TotalDurationSeconds { get; init; }
+
+    public int WarningCount { get; init; }
+
+    public int ErrorCount { get; init; }
+
+    public int TotalDanmakuCount { get; init; }
+}
+
+public sealed class DailyReviewRoomDto
+{
+    public Guid LiveRoomId { get; init; }
+
+    public required string PlatformName { get; init; }
+
+    public required string RoomId { get; init; }
+
+    public string? Title { get; init; }
+
+    public string? AnchorName { get; init; }
+
+    public int SessionCount { get; init; }
+
+    public int SegmentCount { get; init; }
+
+    public double TotalDurationSeconds { get; init; }
+
+    public int WarningCount { get; init; }
+
+    public int ErrorCount { get; init; }
+
+    public int DanmakuCount { get; init; }
+}
+
+public sealed class DailyReviewSessionHighlightDto
+{
+    public required string Key { get; init; }
+
+    public required string Label { get; init; }
+
+    public Guid RecordSessionId { get; init; }
+
+    public Guid LiveRoomId { get; init; }
+
+    public required string PlatformName { get; init; }
+
+    public required string RoomId { get; init; }
+
+    public required string LiveRoomTitle { get; init; }
+
+    public string? AnchorName { get; init; }
+
+    public required RecordSessionStatus Status { get; init; }
+
+    public int SegmentCount { get; init; }
+
+    public double DurationSeconds { get; init; }
+
+    public int DanmakuCount { get; init; }
+
+    public int WarningCount { get; init; }
+
+    public int ErrorCount { get; init; }
+
+    public DateTimeOffset? StartedAt { get; init; }
+
+    public DateTimeOffset? EndedAt { get; init; }
+
+    public string? Summary { get; init; }
+}
+
+public sealed class DailyReviewMomentDto
+{
+    public Guid LiveRoomId { get; init; }
+
+    public Guid RecordSessionId { get; init; }
+
+    public Guid RecordTaskId { get; init; }
+
+    public int SegmentIndex { get; init; }
+
+    public required string PlatformName { get; init; }
+
+    public required string RoomId { get; init; }
+
+    public required string LiveRoomTitle { get; init; }
+
+    public string? AnchorName { get; init; }
+
+    public DateTimeOffset BucketStartedAt { get; init; }
+
+    public DateTimeOffset BucketEndedAt { get; init; }
+
+    public int DanmakuCount { get; init; }
+}
diff --git a/src/LiveRecorder.Application/Models/Settings/SettingsModels.cs b/src/LiveRecorder.Application/Models/Settings/SettingsModels.cs
index 9604396..d223f56 100644
--- a/src/LiveRecorder.Application/Models/Settings/SettingsModels.cs
+++ b/src/LiveRecorder.Application/Models/Settings/SettingsModels.cs
@@ -81,6 +81,12 @@ public sealed class SystemSettingsDto
 
     public int EventScriptTimeoutSeconds { get; set; } = 60;
 
+    public bool EnableRetentionCleanup { get; set; } = false;
+
+    public int RetentionDays { get; set; } = 30;
+
+    public bool RetentionDeleteFiles { get; set; } = false;
+
     public bool EnableEmailNotification { get; set; } = false;
 
     public string EmailSmtpHost { get; set; } = string.Empty;
@@ -138,6 +144,18 @@ public sealed class SystemSettingsDto
 </div>
 """;
 
+    public bool EnableWebhookNotification { get; set; } = false;
+
+    public string WebhookUrl { get; set; } = string.Empty;
+
+    public string WebhookHeaders { get; set; } = string.Empty;
+
+    public int WebhookTimeoutSeconds { get; set; } = 15;
+
+    public bool NotifyWebhookOnLiveStarted { get; set; } = true;
+
+    public bool NotifyWebhookOnException { get; set; } = true;
+
     public string DouyinUserAgent { get; set; } =
         "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36";
 
@@ -218,6 +236,12 @@ public sealed class UpdateSystemSettingsRequest
 
     public int EventScriptTimeoutSeconds { get; set; } = 60;
 
+    public bool EnableRetentionCleanup { get; set; } = false;
+
+    public int RetentionDays { get; set; } = 30;
+
+    public bool RetentionDeleteFiles { get; set; } = false;
+
     public bool EnableEmailNotification { get; set; } = false;
 
     public string EmailSmtpHost { get; set; } = string.Empty;
@@ -275,6 +299,18 @@ public sealed class UpdateSystemSettingsRequest
 </div>
 """;
 
+    public bool EnableWebhookNotification { get; set; } = false;
+
+    public string WebhookUrl { get; set; } = string.Empty;
+
+    public string WebhookHeaders { get; set; } = string.Empty;
+
+    public int WebhookTimeoutSeconds { get; set; } = 15;
+
+    public bool NotifyWebhookOnLiveStarted { get; set; } = true;
+
+    public bool NotifyWebhookOnException { get; set; } = true;
+
     public string DouyinUserAgent { get; set; } =
         "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36";
 
@@ -336,3 +372,62 @@ public sealed class SendTestEmailRequest
 </div>
 """;
 }
+
+public sealed class TestEventScriptRequest
+{
+    public string EventType { get; set; } = "live_started";
+
+    public string ScriptMode { get; set; } = EventScriptSourceModes.Path;
+
+    public string ScriptPath { get; set; } = string.Empty;
+
+    public string ScriptContent { get; set; } = string.Empty;
+
+    public int TimeoutSeconds { get; set; } = 60;
+}
+
+public sealed class EventScriptTestResultDto
+{
+    public bool Success { get; init; }
+
+    public required string Message { get; init; }
+
+    public string? Detail { get; init; }
+
+    public string? CustomLogOutput { get; init; }
+}
+
+public sealed class SendTestWebhookRequest
+{
+    public string WebhookUrl { get; set; } = string.Empty;
+
+    public string WebhookHeaders { get; set; } = string.Empty;
+
+    public int WebhookTimeoutSeconds { get; set; } = 15;
+}
+
+public sealed class WebhookTestResultDto
+{
+    public bool Success { get; init; }
+
+    public required string Message { get; init; }
+
+    public string? Detail { get; init; }
+}
+
+public sealed class RetentionCleanupResultDto
+{
+    public int DeletedSessionCount { get; init; }
+
+    public int DeletedTaskCount { get; init; }
+
+    public int DeletedResultCount { get; init; }
+
+    public int DeletedLogCount { get; init; }
+
+    public int DeletedFileCount { get; init; }
+
+    public int DeletedDanmakuFileCount { get; init; }
+
+    public required IReadOnlyList<string> Warnings { get; init; }
+}
diff --git a/src/LiveRecorder.Application/Services/LiveRoomService.cs b/src/LiveRecorder.Application/Services/LiveRoomService.cs
index 817289e..3fea3b4 100644
--- a/src/LiveRecorder.Application/Services/LiveRoomService.cs
+++ b/src/LiveRecorder.Application/Services/LiveRoomService.cs
@@ -3,6 +3,7 @@ using LiveRecorder.Application.Abstractions.Persistence;
 using LiveRecorder.Application.Abstractions.Platforms;
 using LiveRecorder.Application.Abstractions.Recording;
 using LiveRecorder.Application.Abstractions.Settings;
+using LiveRecorder.Application.Common;
 using LiveRecorder.Application.Models.LiveRooms;
 using LiveRecorder.Application.Models.RecordTasks;
 using LiveRecorder.Domain.Entities;
@@ -424,6 +425,13 @@ public sealed class LiveRoomService
         var settings = await _systemSettingsService.GetAsync(cancellationToken);
         if (!settings.AutoStartRecordingOnLive)
         {
+            liveRoom.SetLastAutoStartDecision(
+                AutoStartDecisionCodes.SkippedDisabled,
+                "Auto-start skipped because automatic start is disabled.",
+                null,
+                DateTimeOffset.UtcNow);
+            await _unitOfWork.SaveChangesAsync(cancellationToken);
+
             await _systemLogService.WriteAsync(
                 SystemLogLevel.Info,
                 "LiveRoom",
@@ -447,6 +455,7 @@ public sealed class LiveRoomService
                 {
                     LiveRoomId = liveRoom.Id
                 },
+                trackAutoStartDecision: true,
                 cancellationToken);
         }
         catch (Exception ex)
@@ -478,6 +487,10 @@ public sealed class LiveRoomService
         EffectiveSettings = _liveRoomRecordingSettingsResolver.BuildEffectiveDto(effectiveSettings),
         IsEnabled = room.IsEnabled,
         AvailabilityStatus = room.AvailabilityStatus,
+        LastAutoStartDecisionCode = room.LastAutoStartDecisionCode,
+        LastAutoStartDecisionSummary = room.LastAutoStartDecisionSummary,
+        LastAutoStartDecisionDetail = room.LastAutoStartDecisionDetail,
+        LastAutoStartDecisionAt = room.LastAutoStartDecisionAt,
         LastCheckedAt = room.LastCheckedAt,
         CreatedAt = room.CreatedAt,
         UpdatedAt = room.UpdatedAt
diff --git a/src/LiveRecorder.Application/Services/LiveRoomStatusService.cs b/src/LiveRecorder.Application/Services/LiveRoomStatusService.cs
index 86ff7b5..734237e 100644
--- a/src/LiveRecorder.Application/Services/LiveRoomStatusService.cs
+++ b/src/LiveRecorder.Application/Services/LiveRoomStatusService.cs
@@ -9,13 +9,16 @@ namespace LiveRecorder.Application.Services;
 public sealed class LiveRoomStatusService
 {
     private readonly IEmailNotificationService _emailNotificationService;
+    private readonly IWebhookNotificationService _webhookNotificationService;
     private readonly IEventScriptService _eventScriptService;
 
     public LiveRoomStatusService(
         IEmailNotificationService emailNotificationService,
+        IWebhookNotificationService webhookNotificationService,
         IEventScriptService eventScriptService)
     {
         _emailNotificationService = emailNotificationService;
+        _webhookNotificationService = webhookNotificationService;
         _eventScriptService = eventScriptService;
     }
 
@@ -53,6 +56,7 @@ public sealed class LiveRoomStatusService
         }
 
         await _emailNotificationService.SendLiveStartedAsync(liveRoom, cancellationToken);
+        await _webhookNotificationService.SendLiveStartedAsync(liveRoom, cancellationToken);
         await _eventScriptService.RunLiveStartedAsync(liveRoom, observedAt, cancellationToken);
         liveRoom.MarkLiveNotificationSent(observedAt);
     }
diff --git a/src/LiveRecorder.Application/Services/RecordService.cs b/src/LiveRecorder.Application/Services/RecordService.cs
index 7c200fd..a5f9e33 100644
--- a/src/LiveRecorder.Application/Services/RecordService.cs
+++ b/src/LiveRecorder.Application/Services/RecordService.cs
@@ -1,4 +1,5 @@
 using System.Text.RegularExpressions;
+using LiveRecorder.Application.Common;
 using LiveRecorder.Application.Abstractions.Logging;
 using LiveRecorder.Application.Abstractions.Notifications;
 using LiveRecorder.Application.Abstractions.Persistence;
@@ -25,6 +26,7 @@ public sealed class RecordService
     private readonly ISystemSettingsService _systemSettingsService;
     private readonly ISystemLogService _systemLogService;
     private readonly IEmailNotificationService _emailNotificationService;
+    private readonly IWebhookNotificationService _webhookNotificationService;
     private readonly LiveRoomStatusService _liveRoomStatusService;
     private readonly LiveRoomRecordingSettingsResolver _liveRoomRecordingSettingsResolver;
     private readonly IStorageGuardService _storageGuardService;
@@ -42,6 +44,7 @@ public sealed class RecordService
         ISystemSettingsService systemSettingsService,
         ISystemLogService systemLogService,
         IEmailNotificationService emailNotificationService,
+        IWebhookNotificationService webhookNotificationService,
         LiveRoomStatusService liveRoomStatusService,
         LiveRoomRecordingSettingsResolver liveRoomRecordingSettingsResolver,
         IStorageGuardService storageGuardService,
@@ -58,6 +61,7 @@ public sealed class RecordService
         _systemSettingsService = systemSettingsService;
         _systemLogService = systemLogService;
         _emailNotificationService = emailNotificationService;
+        _webhookNotificationService = webhookNotificationService;
         _liveRoomStatusService = liveRoomStatusService;
         _liveRoomRecordingSettingsResolver = liveRoomRecordingSettingsResolver;
         _storageGuardService = storageGuardService;
@@ -114,7 +118,13 @@ public sealed class RecordService
         };
     }
 
-    public async Task<RecordTaskDto> StartAsync(StartRecordTaskRequest request, CancellationToken cancellationToken = default)
+    public Task<RecordTaskDto> StartAsync(StartRecordTaskRequest request, CancellationToken cancellationToken = default) =>
+        StartAsync(request, trackAutoStartDecision: false, cancellationToken);
+
+    public async Task<RecordTaskDto> StartAsync(
+        StartRecordTaskRequest request,
+        bool trackAutoStartDecision,
+        CancellationToken cancellationToken = default)
     {
         ArgumentNullException.ThrowIfNull(request);
 
@@ -123,6 +133,16 @@ public sealed class RecordService
 
         if (!liveRoom.IsEnabled)
         {
+            if (trackAutoStartDecision)
+            {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedDisabled,
+                    "Auto-start skipped because the live room is disabled.",
+                    detail: null,
+                    cancellationToken);
+            }
+
             throw new InvalidOperationException("The live room is disabled. Enable it before starting a recording.");
         }
 
@@ -137,6 +157,17 @@ public sealed class RecordService
                 liveRoomId: liveRoom.Id,
                 recordSessionId: activeSession.Id,
                 cancellationToken: cancellationToken);
+
+            if (trackAutoStartDecision)
+            {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedActiveSession,
+                    "Auto-start skipped because an active recording session already exists.",
+                    $"activeSessionId={activeSession.Id}",
+                    cancellationToken);
+            }
+
             throw new InvalidOperationException("An active recording session already exists for the live room.");
         }
 
@@ -151,6 +182,17 @@ public sealed class RecordService
                 storageCheck.Message,
                 liveRoomId: liveRoom.Id,
                 cancellationToken: cancellationToken);
+
+            if (trackAutoStartDecision)
+            {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedStorage,
+                    "Auto-start skipped because storage is below threshold.",
+                    storageCheck.Message,
+                    cancellationToken);
+            }
+
             throw new InvalidOperationException(storageCheck.Message);
         }
 
@@ -180,6 +222,15 @@ public sealed class RecordService
             {
                 initialTask.MarkFailed("The live room is currently offline.", now);
                 recordSession.MarkFailed("The live room is currently offline.", now);
+                if (trackAutoStartDecision)
+                {
+                    ApplyAutoStartDecision(
+                        liveRoom,
+                        AutoStartDecisionCodes.SkippedOffline,
+                        "Auto-start skipped because the live room is offline.",
+                        detail: null);
+                }
+
                 await _unitOfWork.SaveChangesAsync(cancellationToken);
                 await _systemLogService.WriteAsync(
                     SystemLogLevel.Warning,
@@ -218,6 +269,16 @@ public sealed class RecordService
             initialTask.MarkRunning(DateTimeOffset.UtcNow);
             await _unitOfWork.SaveChangesAsync(cancellationToken);
 
+            if (trackAutoStartDecision)
+            {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.Started,
+                    "Auto-start created a recording session.",
+                    $"sessionId={recordSession.Id}; taskId={initialTask.Id}",
+                    cancellationToken);
+            }
+
             await _systemLogService.WriteAsync(
                 SystemLogLevel.Info,
                 "RecordSession",
@@ -232,6 +293,15 @@ public sealed class RecordService
         {
             initialTask.MarkFailed(ex.Message, DateTimeOffset.UtcNow);
             recordSession.MarkFailed(ex.Message, DateTimeOffset.UtcNow);
+            if (trackAutoStartDecision)
+            {
+                ApplyAutoStartDecision(
+                    liveRoom,
+                    AutoStartDecisionCodes.FailedStartup,
+                    "Auto-start failed while creating a recording session.",
+                    ex.Message);
+            }
+
             await _unitOfWork.SaveChangesAsync(cancellationToken);
 
             await _systemLogService.WriteAsync(
@@ -251,6 +321,13 @@ public sealed class RecordService
                 liveRoom,
                 initialTask,
                 cancellationToken);
+            await _webhookNotificationService.SendExceptionAsync(
+                "RecordSession",
+                "Recording session startup failed.",
+                ex.ToString(),
+                liveRoom,
+                initialTask,
+                cancellationToken);
         }
 
         return RecordModelMapper.MapTask(initialTask);
@@ -484,6 +561,16 @@ public sealed class RecordService
         var settings = await _systemSettingsService.GetAsync(cancellationToken);
         if (!settings.AutoStartRecordingOnLive)
         {
+            foreach (var liveRoomId in liveRoomIds)
+            {
+                await TryUpdateAutoStartDecisionAsync(
+                    liveRoomId,
+                    AutoStartDecisionCodes.SkippedDisabled,
+                    "Auto-start skipped because automatic start is disabled.",
+                    detail: null,
+                    cancellationToken);
+            }
+
             return;
         }
 
@@ -492,6 +579,12 @@ public sealed class RecordService
         {
             foreach (var liveRoomId in liveRoomIds)
             {
+                await TryUpdateAutoStartDecisionAsync(
+                    liveRoomId,
+                    AutoStartDecisionCodes.SkippedStorage,
+                    "Auto-start skipped because storage is below threshold.",
+                    storageCheck.Message,
+                    cancellationToken);
                 await _systemLogService.WriteAsync(
                     SystemLogLevel.Warning,
                     "Storage",
@@ -507,13 +600,35 @@ public sealed class RecordService
         foreach (var liveRoomId in liveRoomIds)
         {
             var liveRoom = await _liveRoomRepository.GetByIdAsync(liveRoomId, cancellationToken);
-            if (liveRoom is null || !liveRoom.IsEnabled || liveRoom.AvailabilityStatus != LiveRoomAvailabilityStatus.Live)
+            if (liveRoom is null)
+            {
+                continue;
+            }
+
+            if (!liveRoom.IsEnabled)
+            {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedDisabled,
+                    "Auto-start skipped because the live room is disabled.",
+                    detail: null,
+                    cancellationToken);
+                continue;
+            }
+
+            if (liveRoom.AvailabilityStatus != LiveRoomAvailabilityStatus.Live)
             {
                 continue;
             }
 
             if (await _recordSessionRepository.GetActiveByLiveRoomIdAsync(liveRoom.Id, cancellationToken) is not null)
             {
+                await UpdateAutoStartDecisionAsync(
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedActiveSession,
+                    "Auto-start skipped because an active recording session already exists.",
+                    detail: null,
+                    cancellationToken);
                 continue;
             }
 
@@ -531,6 +646,7 @@ public sealed class RecordService
                     {
                         LiveRoomId = liveRoom.Id
                     },
+                    trackAutoStartDecision: true,
                     cancellationToken);
             }
             catch (Exception ex)
@@ -546,6 +662,57 @@ public sealed class RecordService
         }
     }
 
+    private async Task TryUpdateAutoStartDecisionAsync(
+        Guid liveRoomId,
+        string code,
+        string summary,
+        string? detail,
+        CancellationToken cancellationToken)
+    {
+        var liveRoom = await _liveRoomRepository.GetByIdAsync(liveRoomId, cancellationToken);
+        if (liveRoom is null)
+        {
+            return;
+        }
+
+        await UpdateAutoStartDecisionAsync(liveRoom, code, summary, detail, cancellationToken);
+    }
+
+    private async Task UpdateAutoStartDecisionAsync(
+        LiveRoom liveRoom,
+        string code,
+        string summary,
+        string? detail,
+        CancellationToken cancellationToken)
+    {
+        ApplyAutoStartDecision(liveRoom, code, summary, detail);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+    }
+
+    private static void ApplyAutoStartDecision(
+        LiveRoom liveRoom,
+        string code,
+        string summary,
+        string? detail)
+    {
+        liveRoom.SetLastAutoStartDecision(
+            Truncate(code, 64),
+            Truncate(summary, 256),
+            Truncate(detail, 2048),
+            DateTimeOffset.UtcNow);
+    }
+
+    private static string? Truncate(string? value, int maxLength)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return null;
+        }
+
+        var trimmed = value.Trim();
+        return trimmed.Length <= maxLength ? trimmed : trimmed[..maxLength];
+    }
+
     internal static DeleteCompletedRecordTasksResultDto CreateEmptyDeleteResult() => new()
     {
         DeletedTaskIds = [],
diff --git a/src/LiveRecorder.Application/Services/RecordSessionService.cs b/src/LiveRecorder.Application/Services/RecordSessionService.cs
index 9608e30..18c9cfd 100644
--- a/src/LiveRecorder.Application/Services/RecordSessionService.cs
+++ b/src/LiveRecorder.Application/Services/RecordSessionService.cs
@@ -20,6 +20,7 @@ public sealed class RecordSessionService
     private readonly IFfmpegService _ffmpegService;
     private readonly StoppedOrphanRecordSessionCleanupService _stoppedOrphanRecordSessionCleanupService;
     private readonly ISystemLogService _systemLogService;
+    private readonly SessionAnalyticsService _sessionAnalyticsService;
     private readonly IServiceScopeFactory _serviceScopeFactory;
     private readonly IUnitOfWork _unitOfWork;
 
@@ -31,6 +32,7 @@ public sealed class RecordSessionService
         IFfmpegService ffmpegService,
         StoppedOrphanRecordSessionCleanupService stoppedOrphanRecordSessionCleanupService,
         ISystemLogService systemLogService,
+        SessionAnalyticsService sessionAnalyticsService,
         IServiceScopeFactory serviceScopeFactory,
         IUnitOfWork unitOfWork)
     {
@@ -41,6 +43,7 @@ public sealed class RecordSessionService
         _ffmpegService = ffmpegService;
         _stoppedOrphanRecordSessionCleanupService = stoppedOrphanRecordSessionCleanupService;
         _systemLogService = systemLogService;
+        _sessionAnalyticsService = sessionAnalyticsService;
         _serviceScopeFactory = serviceScopeFactory;
         _unitOfWork = unitOfWork;
     }
@@ -77,13 +80,14 @@ public sealed class RecordSessionService
             }
         }
 
-        var logs = await _systemLogService.ListAsync(recordSessionId: id, take: 500, cancellationToken: cancellationToken);
+        var relatedLogs = await _sessionAnalyticsService.ListRelatedLogsAsync(session, cancellationToken);
         var runtimeStates = _ffmpegService.GetTaskRuntimeStates(
             session.RecordTasks.Select(static item => item.Id).ToArray());
         return new RecordSessionDetailDto
         {
             Session = RecordModelMapper.MapSession(session, runtimeStates),
-            Logs = logs
+            Timeline = await _sessionAnalyticsService.BuildTimelineAsync(session, relatedLogs, cancellationToken),
+            Logs = relatedLogs.Select(MapLog).ToList()
         };
     }
 
@@ -288,4 +292,17 @@ public sealed class RecordSessionService
         var repository = scope.ServiceProvider.GetRequiredService<IRecordSessionRepository>();
         return await repository.GetByIdAsync(id, cancellationToken);
     }
+
+    private static Models.Logs.SystemLogDto MapLog(SystemLogEntry item) => new()
+    {
+        Id = item.Id,
+        Level = item.Level,
+        Category = item.Category,
+        Message = item.Message,
+        Detail = item.Detail,
+        LiveRoomId = item.LiveRoomId,
+        RecordSessionId = item.RecordSessionId,
+        RecordTaskId = item.RecordTaskId,
+        CreatedAt = item.CreatedAt
+    };
 }
diff --git a/src/LiveRecorder.Application/Services/SessionAnalyticsService.cs b/src/LiveRecorder.Application/Services/SessionAnalyticsService.cs
new file mode 100644
index 0000000..b4d38e2
--- /dev/null
+++ b/src/LiveRecorder.Application/Services/SessionAnalyticsService.cs
@@ -0,0 +1,805 @@
+using System.Globalization;
+using System.Xml;
+using LiveRecorder.Application.Abstractions.Persistence;
+using LiveRecorder.Application.Models.Reports;
+using LiveRecorder.Application.Models.RecordTasks;
+using LiveRecorder.Domain.Entities;
+using LiveRecorder.Domain.Enums;
+
+namespace LiveRecorder.Application.Services;
+
+public sealed class SessionAnalyticsService
+{
+    private static readonly TimeSpan TimelineLeadTime = TimeSpan.FromMinutes(10);
+    private static readonly TimeSpan TimelineTailTime = TimeSpan.FromMinutes(10);
+
+    private readonly IRecordSessionRepository _recordSessionRepository;
+    private readonly ISystemLogRepository _systemLogRepository;
+
+    public SessionAnalyticsService(
+        IRecordSessionRepository recordSessionRepository,
+        ISystemLogRepository systemLogRepository)
+    {
+        _recordSessionRepository = recordSessionRepository;
+        _systemLogRepository = systemLogRepository;
+    }
+
+    public async Task<DailyReviewReportDto> GetDailyReviewAsync(
+        DateOnly localDate,
+        int utcOffsetMinutes,
+        CancellationToken cancellationToken = default)
+    {
+        var normalizedOffsetMinutes = Math.Clamp(utcOffsetMinutes, -840, 840);
+        var (windowStartUtc, windowEndUtc) = GetUtcWindow(localDate, normalizedOffsetMinutes);
+        var sessions = await _recordSessionRepository.ListAsync(cancellationToken: cancellationToken);
+        var allLogs = await _systemLogRepository.ListAllAsync(cancellationToken);
+
+        var taskToSessionId = new Dictionary<Guid, Guid>();
+        var sessionById = new Dictionary<Guid, RecordSession>();
+        var overlappingSessionIds = new HashSet<Guid>();
+        var sessionSnapshots = new List<DailySessionSnapshot>();
+        var moments = new List<DailyReviewMomentDto>();
+
+        foreach (var session in sessions)
+        {
+            sessionById[session.Id] = session;
+            foreach (var task in session.RecordTasks)
+            {
+                taskToSessionId[task.Id] = session.Id;
+            }
+
+            var sessionStart = GetSessionStart(session);
+            var sessionEnd = GetSessionEnd(session);
+            if (!OverlapsWindow(sessionStart, sessionEnd, windowStartUtc, windowEndUtc))
+            {
+                continue;
+            }
+
+            overlappingSessionIds.Add(session.Id);
+            var overlappingTasks = session.RecordTasks
+                .Where(task => OverlapsWindow(
+                    GetTaskStart(task),
+                    GetTaskEnd(task, sessionEnd),
+                    windowStartUtc,
+                    windowEndUtc))
+                .OrderBy(task => task.SegmentIndex)
+                .ThenBy(task => task.CreatedAt)
+                .ToArray();
+
+            var danmakuCount = 0;
+            foreach (var task in overlappingTasks)
+            {
+                var taskBuckets = ReadDanmakuBuckets(
+                    task,
+                    GetTaskStart(task),
+                    windowStartUtc,
+                    windowEndUtc);
+                if (taskBuckets.Count > 0)
+                {
+                    danmakuCount += taskBuckets.Sum(static bucket => bucket.MessageCount);
+                    moments.AddRange(taskBuckets.Select(bucket => new DailyReviewMomentDto
+                    {
+                        LiveRoomId = session.LiveRoomId,
+                        RecordSessionId = session.Id,
+                        RecordTaskId = task.Id,
+                        SegmentIndex = task.SegmentIndex,
+                        PlatformName = ResolvePlatformName(session),
+                        RoomId = ResolveRoomId(session),
+                        LiveRoomTitle = ResolveLiveRoomTitle(session),
+                        AnchorName = session.LiveRoom?.AnchorName,
+                        BucketStartedAt = bucket.BucketStartedAt,
+                        BucketEndedAt = bucket.BucketStartedAt.AddMinutes(1),
+                        DanmakuCount = bucket.MessageCount
+                    }));
+                    continue;
+                }
+
+                var rawDanmakuCount = task.Result?.DanmakuMessageCount ?? 0;
+                if (rawDanmakuCount > 0 &&
+                    IsFullyInsideWindow(GetTaskStart(task), GetTaskEnd(task, sessionEnd), windowStartUtc, windowEndUtc))
+                {
+                    danmakuCount += rawDanmakuCount;
+                }
+            }
+
+            sessionSnapshots.Add(new DailySessionSnapshot(
+                Session: session,
+                DurationSeconds: CalculateOverlapSeconds(sessionStart, sessionEnd, windowStartUtc, windowEndUtc),
+                SegmentCount: overlappingTasks.Length,
+                DanmakuCount: danmakuCount));
+        }
+
+        var logsInWindow = allLogs
+            .Where(log => log.CreatedAt >= windowStartUtc && log.CreatedAt < windowEndUtc)
+            .ToArray();
+        var warningCountsBySessionId = new Dictionary<Guid, int>();
+        var errorCountsBySessionId = new Dictionary<Guid, int>();
+        var warningCountsByRoomId = new Dictionary<Guid, int>();
+        var errorCountsByRoomId = new Dictionary<Guid, int>();
+
+        foreach (var log in logsInWindow)
+        {
+            var resolvedSessionId = ResolveSessionId(log, taskToSessionId);
+            if (resolvedSessionId.HasValue && overlappingSessionIds.Contains(resolvedSessionId.Value))
+            {
+                if (log.Level == SystemLogLevel.Warning)
+                {
+                    Increment(warningCountsBySessionId, resolvedSessionId.Value);
+                }
+                else if (log.Level == SystemLogLevel.Error)
+                {
+                    Increment(errorCountsBySessionId, resolvedSessionId.Value);
+                }
+            }
+
+            var resolvedRoomId = ResolveLiveRoomId(log, resolvedSessionId, sessionById);
+            if (!resolvedRoomId.HasValue)
+            {
+                continue;
+            }
+
+            if (log.Level == SystemLogLevel.Warning)
+            {
+                Increment(warningCountsByRoomId, resolvedRoomId.Value);
+            }
+            else if (log.Level == SystemLogLevel.Error)
+            {
+                Increment(errorCountsByRoomId, resolvedRoomId.Value);
+            }
+        }
+
+        var rooms = sessionSnapshots
+            .GroupBy(snapshot => snapshot.Session.LiveRoomId)
+            .Select(group =>
+            {
+                var representative = group
+                    .OrderByDescending(static item => item.Session.StartedAt ?? item.Session.CreatedAt)
+                    .First();
+                return new DailyReviewRoomDto
+                {
+                    LiveRoomId = group.Key,
+                    PlatformName = ResolvePlatformName(representative.Session),
+                    RoomId = ResolveRoomId(representative.Session),
+                    Title = representative.Session.LiveRoom?.Title,
+                    AnchorName = representative.Session.LiveRoom?.AnchorName,
+                    SessionCount = group.Count(),
+                    SegmentCount = group.Sum(static item => item.SegmentCount),
+                    TotalDurationSeconds = group.Sum(static item => item.DurationSeconds),
+                    WarningCount = warningCountsByRoomId.GetValueOrDefault(group.Key),
+                    ErrorCount = errorCountsByRoomId.GetValueOrDefault(group.Key),
+                    DanmakuCount = group.Sum(static item => item.DanmakuCount)
+                };
+            })
+            .OrderByDescending(static item => item.TotalDurationSeconds)
+            .ThenByDescending(static item => item.DanmakuCount)
+            .ToList();
+
+        var highlights = BuildHighlights(sessionSnapshots, warningCountsBySessionId, errorCountsBySessionId);
+        var totalWarningCount = logsInWindow.Count(static log => log.Level == SystemLogLevel.Warning);
+        var totalErrorCount = logsInWindow.Count(static log => log.Level == SystemLogLevel.Error);
+
+        return new DailyReviewReportDto
+        {
+            Date = localDate.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture),
+            UtcOffsetMinutes = normalizedOffsetMinutes,
+            WindowStartUtc = windowStartUtc,
+            WindowEndUtc = windowEndUtc,
+            Summary = new DailyReviewSummaryDto
+            {
+                ActiveLiveRoomCount = rooms.Count,
+                SessionCount = sessionSnapshots.Count,
+                SegmentCount = sessionSnapshots.Sum(static item => item.SegmentCount),
+                TotalDurationSeconds = sessionSnapshots.Sum(static item => item.DurationSeconds),
+                WarningCount = totalWarningCount,
+                ErrorCount = totalErrorCount,
+                TotalDanmakuCount = sessionSnapshots.Sum(static item => item.DanmakuCount)
+            },
+            Rooms = rooms,
+            Highlights = highlights,
+            Moments = moments
+                .OrderByDescending(static item => item.DanmakuCount)
+                .ThenBy(static item => item.BucketStartedAt)
+                .Take(12)
+                .ToList()
+        };
+    }
+
+    public async Task<IReadOnlyList<SystemLogEntry>> ListRelatedLogsAsync(
+        RecordSession session,
+        CancellationToken cancellationToken = default)
+    {
+        var taskIds = session.RecordTasks
+            .Select(static item => item.Id)
+            .Distinct()
+            .ToArray();
+
+        var bySession = await _systemLogRepository.ListByRecordSessionIdsAsync([session.Id], cancellationToken);
+        var byTask = await _systemLogRepository.ListByRecordTaskIdsAsync(taskIds, cancellationToken);
+
+        return bySession
+            .Concat(byTask)
+            .GroupBy(static item => item.Id)
+            .Select(static group => group.First())
+            .OrderByDescending(static item => item.CreatedAt)
+            .ToArray();
+    }
+
+    public async Task<RecordSessionTimelineDto> BuildTimelineAsync(
+        RecordSession session,
+        IReadOnlyList<SystemLogEntry> relatedLogs,
+        CancellationToken cancellationToken = default)
+    {
+        var anchorAt = GetSessionStart(session);
+        var sessionEnd = GetSessionEnd(session);
+        var segmentSnapshots = session.RecordTasks
+            .OrderBy(static item => item.SegmentIndex)
+            .ThenBy(static item => item.CreatedAt)
+            .Select(task =>
+            {
+                var startedAt = GetTaskStart(task);
+                var endedAt = GetTaskEnd(task, sessionEnd);
+                return new SegmentSnapshot(
+                    Task: task,
+                    StartedAt: startedAt,
+                    EndedAt: endedAt);
+            })
+            .ToList();
+
+        var heatBuckets = segmentSnapshots
+            .SelectMany(snapshot => ReadDanmakuBuckets(snapshot.Task, snapshot.StartedAt, null, null)
+                .Select(bucket => new RecordSessionHeatBucketDto
+                {
+                    RecordTaskId = snapshot.Task.Id,
+                    SegmentIndex = snapshot.Task.SegmentIndex,
+                    BucketStartedAt = bucket.BucketStartedAt,
+                    OffsetSeconds = 0,
+                    DurationSeconds = 60,
+                    MessageCount = bucket.MessageCount
+                }))
+            .OrderBy(static item => item.BucketStartedAt)
+            .ToList();
+
+        var allLogs = await _systemLogRepository.ListAllAsync(cancellationToken);
+        var supplementalLiveRoomLogs = allLogs
+            .Where(log =>
+                log.LiveRoomId == session.LiveRoomId &&
+                log.CreatedAt >= anchorAt - TimelineLeadTime &&
+                log.CreatedAt <= sessionEnd + TimelineTailTime &&
+                IsRelevantLiveRoomTimelineLog(log))
+            .Where(log => relatedLogs.All(existing => existing.Id != log.Id))
+            .ToArray();
+
+        var combinedLogs = relatedLogs
+            .Concat(supplementalLiveRoomLogs)
+            .GroupBy(static item => item.Id)
+            .Select(static group => group.First())
+            .OrderBy(static item => item.CreatedAt)
+            .ToArray();
+
+        var maxEventTime = combinedLogs.Length == 0
+            ? sessionEnd
+            : combinedLogs.Max(static item => item.CreatedAt);
+        var maxSegmentTime = segmentSnapshots.Count == 0
+            ? sessionEnd
+            : segmentSnapshots.Max(static item => item.EndedAt);
+        var maxHeatTime = heatBuckets.Count == 0
+            ? sessionEnd
+            : heatBuckets.Max(static item => item.BucketStartedAt.AddMinutes(1));
+        var timelineEnd = new[]
+        {
+            sessionEnd,
+            maxEventTime,
+            maxSegmentTime,
+            maxHeatTime
+        }.Max();
+        if (timelineEnd <= anchorAt)
+        {
+            timelineEnd = anchorAt.AddMinutes(1);
+        }
+
+        var totalDurationSeconds = Math.Max(60, (timelineEnd - anchorAt).TotalSeconds);
+        var segments = segmentSnapshots
+            .Select(snapshot => new RecordSessionTimelineSegmentDto
+            {
+                RecordTaskId = snapshot.Task.Id,
+                SegmentIndex = snapshot.Task.SegmentIndex,
+                Status = snapshot.Task.Status,
+                StartedAt = snapshot.StartedAt,
+                EndedAt = snapshot.EndedAt,
+                OffsetSeconds = CalculateOffsetSeconds(snapshot.StartedAt, anchorAt),
+                DurationSeconds = Math.Max(1, (snapshot.EndedAt - snapshot.StartedAt).TotalSeconds),
+                Label = Path.GetFileName(snapshot.Task.Result?.FilePath ?? snapshot.Task.OutputFilePath ?? string.Empty),
+                Detail = snapshot.Task.ErrorMessage ?? snapshot.Task.PostProcessDetail()
+            })
+            .ToList();
+
+        for (var i = 0; i < heatBuckets.Count; i++)
+        {
+            heatBuckets[i] = new RecordSessionHeatBucketDto
+            {
+                RecordTaskId = heatBuckets[i].RecordTaskId,
+                SegmentIndex = heatBuckets[i].SegmentIndex,
+                BucketStartedAt = heatBuckets[i].BucketStartedAt,
+                OffsetSeconds = CalculateOffsetSeconds(heatBuckets[i].BucketStartedAt, anchorAt),
+                DurationSeconds = heatBuckets[i].DurationSeconds,
+                MessageCount = heatBuckets[i].MessageCount
+            };
+        }
+
+        var events = new List<RecordSessionTimelineEventDto>();
+        events.Add(new RecordSessionTimelineEventDto
+        {
+            Id = $"session-created-{session.Id}",
+            Layer = TimelineLayers.Session,
+            Title = "Session created",
+            Detail = ResolveLiveRoomTitle(session),
+            OccurredAt = session.CreatedAt,
+            OffsetSeconds = CalculateOffsetSeconds(session.CreatedAt, anchorAt)
+        });
+
+        if (session.StartedAt.HasValue)
+        {
+            events.Add(new RecordSessionTimelineEventDto
+            {
+                Id = $"session-started-{session.Id}",
+                Layer = TimelineLayers.Session,
+                Title = "Recording started",
+                Detail = session.StreamUrl,
+                OccurredAt = session.StartedAt.Value,
+                OffsetSeconds = CalculateOffsetSeconds(session.StartedAt.Value, anchorAt)
+            });
+        }
+
+        if (session.EndedAt.HasValue)
+        {
+            events.Add(new RecordSessionTimelineEventDto
+            {
+                Id = $"session-ended-{session.Id}",
+                Layer = TimelineLayers.Session,
+                Title = $"Session {session.Status}",
+                Detail = session.ErrorMessage,
+                OccurredAt = session.EndedAt.Value,
+                OffsetSeconds = CalculateOffsetSeconds(session.EndedAt.Value, anchorAt)
+            });
+        }
+
+        foreach (var log in combinedLogs)
+        {
+            var layer = ClassifyTimelineLayer(log);
+            if (layer is null)
+            {
+                continue;
+            }
+
+            var relatedTask = log.RecordTaskId.HasValue
+                ? session.RecordTasks.FirstOrDefault(task => task.Id == log.RecordTaskId.Value)
+                : null;
+            events.Add(new RecordSessionTimelineEventDto
+            {
+                Id = $"log-{log.Id}",
+                Layer = layer,
+                Title = log.Message,
+                Detail = log.Detail,
+                RecordTaskId = relatedTask?.Id,
+                SegmentIndex = relatedTask?.SegmentIndex,
+                Level = log.Level,
+                OccurredAt = log.CreatedAt,
+                OffsetSeconds = CalculateOffsetSeconds(log.CreatedAt, anchorAt)
+            });
+        }
+
+        return new RecordSessionTimelineDto
+        {
+            AnchorAt = anchorAt,
+            TotalDurationSeconds = totalDurationSeconds,
+            Segments = segments,
+            Events = events
+                .OrderBy(static item => item.OccurredAt)
+                .ThenBy(static item => item.Layer)
+                .ToList(),
+            HeatBuckets = heatBuckets
+        };
+    }
+
+    private static IReadOnlyList<DailyReviewSessionHighlightDto> BuildHighlights(
+        IReadOnlyList<DailySessionSnapshot> snapshots,
+        IReadOnlyDictionary<Guid, int> warningCountsBySessionId,
+        IReadOnlyDictionary<Guid, int> errorCountsBySessionId)
+    {
+        if (snapshots.Count == 0)
+        {
+            return [];
+        }
+
+        var longest = snapshots
+            .OrderByDescending(static item => item.DurationSeconds)
+            .ThenByDescending(static item => item.SegmentCount)
+            .First();
+        var mostDanmaku = snapshots
+            .OrderByDescending(static item => item.DanmakuCount)
+            .ThenByDescending(static item => item.DurationSeconds)
+            .First();
+        var mostExceptional = snapshots
+            .OrderByDescending(item => item.Session.Status == RecordSessionStatus.Failed)
+            .ThenByDescending(item => errorCountsBySessionId.GetValueOrDefault(item.Session.Id))
+            .ThenByDescending(item => warningCountsBySessionId.GetValueOrDefault(item.Session.Id))
+            .ThenByDescending(static item => item.DurationSeconds)
+            .First();
+
+        return
+        [
+            CreateHighlight(
+                "longest_session",
+                "Longest session",
+                longest,
+                warningCountsBySessionId.GetValueOrDefault(longest.Session.Id),
+                errorCountsBySessionId.GetValueOrDefault(longest.Session.Id),
+                $"Recorded {longest.DurationSeconds:F0}s across {longest.SegmentCount} segment(s)."),
+            CreateHighlight(
+                "most_danmaku",
+                "Most danmaku",
+                mostDanmaku,
+                warningCountsBySessionId.GetValueOrDefault(mostDanmaku.Session.Id),
+                errorCountsBySessionId.GetValueOrDefault(mostDanmaku.Session.Id),
+                $"Captured {mostDanmaku.DanmakuCount} danmaku event(s)."),
+            CreateHighlight(
+                "exceptional_session",
+                "Most exceptions",
+                mostExceptional,
+                warningCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id),
+                errorCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id),
+                errorCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id) > 0 ||
+                warningCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id) > 0
+                    ? $"Warnings={warningCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id)}, Errors={errorCountsBySessionId.GetValueOrDefault(mostExceptional.Session.Id)}"
+                    : "No warnings or errors were recorded for this session.")
+        ];
+    }
+
+    private static DailyReviewSessionHighlightDto CreateHighlight(
+        string key,
+        string label,
+        DailySessionSnapshot snapshot,
+        int warningCount,
+        int errorCount,
+        string summary) =>
+        new()
+        {
+            Key = key,
+            Label = label,
+            RecordSessionId = snapshot.Session.Id,
+            LiveRoomId = snapshot.Session.LiveRoomId,
+            PlatformName = ResolvePlatformName(snapshot.Session),
+            RoomId = ResolveRoomId(snapshot.Session),
+            LiveRoomTitle = ResolveLiveRoomTitle(snapshot.Session),
+            AnchorName = snapshot.Session.LiveRoom?.AnchorName,
+            Status = snapshot.Session.Status,
+            SegmentCount = snapshot.SegmentCount,
+            DurationSeconds = snapshot.DurationSeconds,
+            DanmakuCount = snapshot.DanmakuCount,
+            WarningCount = warningCount,
+            ErrorCount = errorCount,
+            StartedAt = snapshot.Session.StartedAt,
+            EndedAt = snapshot.Session.EndedAt,
+            Summary = summary
+        };
+
+    private static (DateTimeOffset WindowStartUtc, DateTimeOffset WindowEndUtc) GetUtcWindow(
+        DateOnly localDate,
+        int utcOffsetMinutes)
+    {
+        var offset = TimeSpan.FromMinutes(utcOffsetMinutes);
+        var localStart = new DateTimeOffset(localDate.ToDateTime(TimeOnly.MinValue), offset);
+        return (localStart.ToUniversalTime(), localStart.AddDays(1).ToUniversalTime());
+    }
+
+    private static bool OverlapsWindow(
+        DateTimeOffset startedAt,
+        DateTimeOffset endedAt,
+        DateTimeOffset windowStartUtc,
+        DateTimeOffset windowEndUtc) =>
+        startedAt < windowEndUtc && endedAt > windowStartUtc;
+
+    private static bool IsFullyInsideWindow(
+        DateTimeOffset startedAt,
+        DateTimeOffset endedAt,
+        DateTimeOffset windowStartUtc,
+        DateTimeOffset windowEndUtc) =>
+        startedAt >= windowStartUtc && endedAt <= windowEndUtc;
+
+    private static double CalculateOverlapSeconds(
+        DateTimeOffset startedAt,
+        DateTimeOffset endedAt,
+        DateTimeOffset windowStartUtc,
+        DateTimeOffset windowEndUtc)
+    {
+        var overlapStart = startedAt > windowStartUtc ? startedAt : windowStartUtc;
+        var overlapEnd = endedAt < windowEndUtc ? endedAt : windowEndUtc;
+        return overlapEnd <= overlapStart ? 0 : (overlapEnd - overlapStart).TotalSeconds;
+    }
+
+    private static Guid? ResolveSessionId(
+        SystemLogEntry log,
+        IReadOnlyDictionary<Guid, Guid> taskToSessionId)
+    {
+        if (log.RecordSessionId.HasValue)
+        {
+            return log.RecordSessionId.Value;
+        }
+
+        if (log.RecordTaskId.HasValue && taskToSessionId.TryGetValue(log.RecordTaskId.Value, out var sessionId))
+        {
+            return sessionId;
+        }
+
+        return null;
+    }
+
+    private static Guid? ResolveLiveRoomId(
+        SystemLogEntry log,
+        Guid? resolvedSessionId,
+        IReadOnlyDictionary<Guid, RecordSession> sessionById)
+    {
+        if (log.LiveRoomId.HasValue)
+        {
+            return log.LiveRoomId.Value;
+        }
+
+        if (resolvedSessionId.HasValue && sessionById.TryGetValue(resolvedSessionId.Value, out var session))
+        {
+            return session.LiveRoomId;
+        }
+
+        return null;
+    }
+
+    private static void Increment(IDictionary<Guid, int> lookup, Guid key)
+    {
+        if (!lookup.TryAdd(key, 1))
+        {
+            lookup[key]++;
+        }
+    }
+
+    private static string ResolvePlatformName(RecordSession session) =>
+        (session.LiveRoom?.Platform ?? LivePlatformType.Unknown).ToString();
+
+    private static string ResolveRoomId(RecordSession session) =>
+        session.LiveRoom?.RoomId ?? string.Empty;
+
+    private static string ResolveLiveRoomTitle(RecordSession session) =>
+        session.LiveRoom?.Title ??
+        session.LiveRoom?.AnchorName ??
+        session.LiveRoom?.RoomId ??
+        "Unknown Room";
+
+    private static DateTimeOffset GetSessionStart(RecordSession session) =>
+        session.StartedAt ?? session.CreatedAt;
+
+    private static DateTimeOffset GetSessionEnd(RecordSession session)
+    {
+        var effectiveEnd = session.EndedAt ?? DateTimeOffset.UtcNow;
+        var startedAt = GetSessionStart(session);
+        return effectiveEnd >= startedAt ? effectiveEnd : startedAt;
+    }
+
+    private static DateTimeOffset GetTaskStart(RecordTask task) =>
+        task.StartedAt ?? task.CreatedAt;
+
+    private static DateTimeOffset GetTaskEnd(RecordTask task, DateTimeOffset fallbackEnd)
+    {
+        var effectiveEnd = task.EndedAt ?? fallbackEnd;
+        var startedAt = GetTaskStart(task);
+        return effectiveEnd >= startedAt ? effectiveEnd : startedAt;
+    }
+
+    private static double CalculateOffsetSeconds(DateTimeOffset occurredAt, DateTimeOffset anchorAt) =>
+        Math.Max(0, (occurredAt - anchorAt).TotalSeconds);
+
+    private static string? ClassifyTimelineLayer(SystemLogEntry log)
+    {
+        if (string.Equals(log.Category, "Danmaku", StringComparison.OrdinalIgnoreCase))
+        {
+            return TimelineLayers.Danmaku;
+        }
+
+        if (string.Equals(log.Category, "Webhook", StringComparison.OrdinalIgnoreCase) ||
+            string.Equals(log.Category, "Script", StringComparison.OrdinalIgnoreCase) ||
+            string.Equals(log.Category, "ScriptTest", StringComparison.OrdinalIgnoreCase))
+        {
+            return TimelineLayers.Automation;
+        }
+
+        if (string.Equals(log.Category, "FFmpeg", StringComparison.OrdinalIgnoreCase) &&
+            IsProcessingMessage(log.Message))
+        {
+            return TimelineLayers.Processing;
+        }
+
+        if (string.Equals(log.Category, "RecordSession", StringComparison.OrdinalIgnoreCase) ||
+            string.Equals(log.Category, "Scheduler", StringComparison.OrdinalIgnoreCase) ||
+            string.Equals(log.Category, "LiveRoom", StringComparison.OrdinalIgnoreCase) ||
+            string.Equals(log.Category, "FFmpeg", StringComparison.OrdinalIgnoreCase))
+        {
+            return TimelineLayers.Session;
+        }
+
+        return null;
+    }
+
+    private static bool IsRelevantLiveRoomTimelineLog(SystemLogEntry log)
+    {
+        if (string.Equals(log.Category, "Scheduler", StringComparison.OrdinalIgnoreCase))
+        {
+            return true;
+        }
+
+        if (string.Equals(log.Category, "LiveRoom", StringComparison.OrdinalIgnoreCase))
+        {
+            return true;
+        }
+
+        return false;
+    }
+
+    private static bool IsProcessingMessage(string message) =>
+        message.Contains("finalization", StringComparison.OrdinalIgnoreCase) ||
+        message.Contains("transcode", StringComparison.OrdinalIgnoreCase) ||
+        message.Contains("seek index", StringComparison.OrdinalIgnoreCase) ||
+        message.Contains("post-process", StringComparison.OrdinalIgnoreCase) ||
+        message.Contains("rollover", StringComparison.OrdinalIgnoreCase);
+
+    private static IReadOnlyList<DanmakuBucketSnapshot> ReadDanmakuBuckets(
+        RecordTask task,
+        DateTimeOffset taskStartedAt,
+        DateTimeOffset? windowStartUtc,
+        DateTimeOffset? windowEndUtc)
+    {
+        var danmakuPath = ResolveDanmakuPath(task);
+        if (string.IsNullOrWhiteSpace(danmakuPath) || !File.Exists(danmakuPath))
+        {
+            return [];
+        }
+
+        var buckets = new Dictionary<DateTimeOffset, int>();
+
+        try
+        {
+            var settings = new XmlReaderSettings
+            {
+                IgnoreComments = true,
+                IgnoreWhitespace = true,
+                DtdProcessing = DtdProcessing.Ignore
+            };
+            using var reader = XmlReader.Create(danmakuPath, settings);
+            while (reader.Read())
+            {
+                if (reader.NodeType != XmlNodeType.Element)
+                {
+                    continue;
+                }
+
+                double? offsetSeconds = null;
+                if (string.Equals(reader.Name, "d", StringComparison.OrdinalIgnoreCase))
+                {
+                    var payload = reader.GetAttribute("p");
+                    if (!string.IsNullOrWhiteSpace(payload))
+                    {
+                        var firstPart = payload.Split(',').FirstOrDefault();
+                        if (double.TryParse(firstPart, NumberStyles.Float, CultureInfo.InvariantCulture, out var parsedSeconds))
+                        {
+                            offsetSeconds = parsedSeconds;
+                        }
+                    }
+                }
+                else if (string.Equals(reader.Name, "event", StringComparison.OrdinalIgnoreCase))
+                {
+                    var payload = reader.GetAttribute("offset");
+                    if (!string.IsNullOrWhiteSpace(payload) &&
+                        double.TryParse(payload, NumberStyles.Float, CultureInfo.InvariantCulture, out var parsedSeconds))
+                    {
+                        offsetSeconds = parsedSeconds;
+                    }
+                }
+
+                if (!offsetSeconds.HasValue)
+                {
+                    continue;
+                }
+
+                var occurredAt = taskStartedAt.AddSeconds(Math.Max(0, offsetSeconds.Value));
+                if (windowStartUtc.HasValue && occurredAt < windowStartUtc.Value)
+                {
+                    continue;
+                }
+
+                if (windowEndUtc.HasValue && occurredAt >= windowEndUtc.Value)
+                {
+                    continue;
+                }
+
+                var bucketStartAt = TruncateToMinute(occurredAt);
+                if (!buckets.TryAdd(bucketStartAt, 1))
+                {
+                    buckets[bucketStartAt]++;
+                }
+            }
+        }
+        catch
+        {
+            return [];
+        }
+
+        return buckets
+            .OrderBy(static pair => pair.Key)
+            .Select(static pair => new DanmakuBucketSnapshot(pair.Key, pair.Value))
+            .ToArray();
+    }
+
+    private static DateTimeOffset TruncateToMinute(DateTimeOffset value)
+    {
+        var utcValue = value.ToUniversalTime();
+        var truncatedUtc = new DateTime(
+            utcValue.Year,
+            utcValue.Month,
+            utcValue.Day,
+            utcValue.Hour,
+            utcValue.Minute,
+            0,
+            DateTimeKind.Utc);
+        return new DateTimeOffset(truncatedUtc);
+    }
+
+    private static string? ResolveDanmakuPath(RecordTask task)
+    {
+        if (!string.IsNullOrWhiteSpace(task.Result?.DanmakuFilePath))
+        {
+            return task.Result.DanmakuFilePath;
+        }
+
+        if (string.IsNullOrWhiteSpace(task.OutputFilePath))
+        {
+            return null;
+        }
+
+        var absoluteVideoPath = Path.IsPathRooted(task.OutputFilePath)
+            ? task.OutputFilePath
+            : Path.GetFullPath(task.OutputFilePath, AppContext.BaseDirectory);
+        return Path.ChangeExtension(absoluteVideoPath, ".xml");
+    }
+
+    private sealed record DailySessionSnapshot(
+        RecordSession Session,
+        double DurationSeconds,
+        int SegmentCount,
+        int DanmakuCount);
+
+    private sealed record SegmentSnapshot(
+        RecordTask Task,
+        DateTimeOffset StartedAt,
+        DateTimeOffset EndedAt);
+
+    private sealed record DanmakuBucketSnapshot(
+        DateTimeOffset BucketStartedAt,
+        int MessageCount);
+
+    private static class TimelineLayers
+    {
+        public const string Session = "session";
+        public const string Processing = "processing";
+        public const string Danmaku = "danmaku";
+        public const string Automation = "automation";
+    }
+}
+
+internal static class RecordTaskAnalyticsExtensions
+{
+    public static string? PostProcessDetail(this RecordTask task)
+    {
+        if (task.Status == RecordTaskStatus.Processing)
+        {
+            return task.ErrorMessage;
+        }
+
+        return null;
+    }
+}
diff --git a/src/LiveRecorder.Application/Services/SystemSettingsService.cs b/src/LiveRecorder.Application/Services/SystemSettingsService.cs
index 35cbd15..b5c80d1 100644
--- a/src/LiveRecorder.Application/Services/SystemSettingsService.cs
+++ b/src/LiveRecorder.Application/Services/SystemSettingsService.cs
@@ -43,6 +43,9 @@ public sealed class SystemSettingsService : ISystemSettingsService
     private const string SegmentCompletedScriptPathKey = "event_scripts.segment_completed.path";
     private const string SegmentCompletedScriptContentKey = "event_scripts.segment_completed.content";
     private const string EventScriptTimeoutSecondsKey = "event_scripts.timeout_seconds";
+    private const string EnableRetentionCleanupKey = "retention.cleanup.enabled";
+    private const string RetentionDaysKey = "retention.cleanup.days";
+    private const string RetentionDeleteFilesKey = "retention.cleanup.delete_files";
     private const string EnableEmailNotificationKey = "notification.email.enabled";
     private const string EmailSmtpHostKey = "notification.email.smtp_host";
     private const string EmailSmtpPortKey = "notification.email.smtp_port";
@@ -58,6 +61,12 @@ public sealed class SystemSettingsService : ISystemSettingsService
     private const string EmailLiveStartedBodyTemplateHtmlKey = "notification.email.live_started.body_template_html";
     private const string EmailExceptionSubjectTemplateKey = "notification.email.exception.subject_template";
     private const string EmailExceptionBodyTemplateHtmlKey = "notification.email.exception.body_template_html";
+    private const string EnableWebhookNotificationKey = "notification.webhook.enabled";
+    private const string WebhookUrlKey = "notification.webhook.url";
+    private const string WebhookHeadersKey = "notification.webhook.headers";
+    private const string WebhookTimeoutSecondsKey = "notification.webhook.timeout_seconds";
+    private const string NotifyWebhookOnLiveStartedKey = "notification.webhook.notify_live_started";
+    private const string NotifyWebhookOnExceptionKey = "notification.webhook.notify_exception";
     private const string DouyinUserAgentKey = "douyin.user_agent";
     private const string DouyinRefererKey = "douyin.referer";
     private const string DouyinCookieKey = "douyin.cookie";
@@ -119,6 +128,9 @@ public sealed class SystemSettingsService : ISystemSettingsService
             SegmentCompletedScriptPath = GetValue(lookup, SegmentCompletedScriptPathKey, string.Empty),
             SegmentCompletedScriptContent = GetValue(lookup, SegmentCompletedScriptContentKey, string.Empty),
             EventScriptTimeoutSeconds = GetIntValue(lookup, EventScriptTimeoutSecondsKey, 60, 1, 3600),
+            EnableRetentionCleanup = bool.TryParse(GetValue(lookup, EnableRetentionCleanupKey, "false"), out var enableRetentionCleanup) && enableRetentionCleanup,
+            RetentionDays = GetIntValue(lookup, RetentionDaysKey, 30, 1, 3650),
+            RetentionDeleteFiles = bool.TryParse(GetValue(lookup, RetentionDeleteFilesKey, "false"), out var retentionDeleteFiles) && retentionDeleteFiles,
             EnableEmailNotification = bool.TryParse(GetValue(lookup, EnableEmailNotificationKey, "false"), out var enableEmailNotification) && enableEmailNotification,
             EmailSmtpHost = GetValue(lookup, EmailSmtpHostKey, string.Empty),
             EmailSmtpPort = GetIntValue(lookup, EmailSmtpPortKey, 587, 1, 65535),
@@ -167,6 +179,12 @@ public sealed class SystemSettingsService : ISystemSettingsService
                   <div style="margin-top: 16px; padding: 12px 14px; border-radius: 8px; background: #f5f5f5; white-space: pre-wrap;">{{detail}}</div>
                 </div>
                 """),
+            EnableWebhookNotification = bool.TryParse(GetValue(lookup, EnableWebhookNotificationKey, "false"), out var enableWebhookNotification) && enableWebhookNotification,
+            WebhookUrl = GetValue(lookup, WebhookUrlKey, string.Empty),
+            WebhookHeaders = GetValue(lookup, WebhookHeadersKey, string.Empty),
+            WebhookTimeoutSeconds = GetIntValue(lookup, WebhookTimeoutSecondsKey, 15, 1, 300),
+            NotifyWebhookOnLiveStarted = bool.TryParse(GetValue(lookup, NotifyWebhookOnLiveStartedKey, "true"), out var notifyWebhookOnLiveStarted) && notifyWebhookOnLiveStarted,
+            NotifyWebhookOnException = bool.TryParse(GetValue(lookup, NotifyWebhookOnExceptionKey, "true"), out var notifyWebhookOnException) && notifyWebhookOnException,
             DouyinUserAgent = GetValue(
                 lookup,
                 DouyinUserAgentKey,
@@ -233,6 +251,9 @@ public sealed class SystemSettingsService : ISystemSettingsService
         await UpsertAsync(SegmentCompletedScriptPathKey, request.SegmentCompletedScriptPath.Trim(), now, cancellationToken);
         await UpsertAsync(SegmentCompletedScriptContentKey, request.SegmentCompletedScriptContent, now, cancellationToken);
         await UpsertAsync(EventScriptTimeoutSecondsKey, Math.Clamp(request.EventScriptTimeoutSeconds, 1, 3600).ToString(), now, cancellationToken);
+        await UpsertAsync(EnableRetentionCleanupKey, request.EnableRetentionCleanup.ToString(), now, cancellationToken);
+        await UpsertAsync(RetentionDaysKey, Math.Clamp(request.RetentionDays, 1, 3650).ToString(), now, cancellationToken);
+        await UpsertAsync(RetentionDeleteFilesKey, request.RetentionDeleteFiles.ToString(), now, cancellationToken);
         await UpsertAsync(EnableEmailNotificationKey, request.EnableEmailNotification.ToString(), now, cancellationToken);
         await UpsertAsync(EmailSmtpHostKey, request.EmailSmtpHost.Trim(), now, cancellationToken);
         await UpsertAsync(EmailSmtpPortKey, request.EmailSmtpPort.ToString(), now, cancellationToken);
@@ -248,6 +269,12 @@ public sealed class SystemSettingsService : ISystemSettingsService
         await UpsertAsync(EmailLiveStartedBodyTemplateHtmlKey, request.EmailLiveStartedBodyTemplateHtml.Trim(), now, cancellationToken);
         await UpsertAsync(EmailExceptionSubjectTemplateKey, request.EmailExceptionSubjectTemplate.Trim(), now, cancellationToken);
         await UpsertAsync(EmailExceptionBodyTemplateHtmlKey, request.EmailExceptionBodyTemplateHtml.Trim(), now, cancellationToken);
+        await UpsertAsync(EnableWebhookNotificationKey, request.EnableWebhookNotification.ToString(), now, cancellationToken);
+        await UpsertAsync(WebhookUrlKey, request.WebhookUrl.Trim(), now, cancellationToken);
+        await UpsertAsync(WebhookHeadersKey, request.WebhookHeaders, now, cancellationToken);
+        await UpsertAsync(WebhookTimeoutSecondsKey, Math.Clamp(request.WebhookTimeoutSeconds, 1, 300).ToString(), now, cancellationToken);
+        await UpsertAsync(NotifyWebhookOnLiveStartedKey, request.NotifyWebhookOnLiveStarted.ToString(), now, cancellationToken);
+        await UpsertAsync(NotifyWebhookOnExceptionKey, request.NotifyWebhookOnException.ToString(), now, cancellationToken);
         await UpsertAsync(DouyinUserAgentKey, request.DouyinUserAgent.Trim(), now, cancellationToken);
         await UpsertAsync(DouyinRefererKey, request.DouyinReferer.Trim(), now, cancellationToken);
         await UpsertAsync(DouyinCookieKey, request.DouyinCookie.Trim(), now, cancellationToken);
diff --git a/src/LiveRecorder.Domain/Entities/LiveRoom.cs b/src/LiveRecorder.Domain/Entities/LiveRoom.cs
index 001884b..eabdc45 100644
--- a/src/LiveRecorder.Domain/Entities/LiveRoom.cs
+++ b/src/LiveRecorder.Domain/Entities/LiveRoom.cs
@@ -76,6 +76,14 @@ public class LiveRoom
 
     public LiveRoomAvailabilityStatus AvailabilityStatus { get; private set; }
 
+    public string? LastAutoStartDecisionCode { get; private set; }
+
+    public string? LastAutoStartDecisionSummary { get; private set; }
+
+    public string? LastAutoStartDecisionDetail { get; private set; }
+
+    public DateTimeOffset? LastAutoStartDecisionAt { get; private set; }
+
     public DateTimeOffset CreatedAt { get; private set; }
 
     public DateTimeOffset UpdatedAt { get; private set; }
@@ -131,6 +139,18 @@ public class LiveRoom
         UpdatedAt = updatedAt;
     }
 
+    public void SetLastAutoStartDecision(
+        string? code,
+        string? summary,
+        string? detail,
+        DateTimeOffset decidedAt)
+    {
+        LastAutoStartDecisionCode = NormalizeNullable(code);
+        LastAutoStartDecisionSummary = NormalizeNullable(summary);
+        LastAutoStartDecisionDetail = NormalizeNullable(detail);
+        LastAutoStartDecisionAt = decidedAt;
+    }
+
     public void UpdateRecordingSettingsOverrides(
         string? preferredQualityOverride,
         RecordOutputFormat? outputFormatOverride,
diff --git a/src/LiveRecorder.Infrastructure/Persistence/DatabaseInitializer.cs b/src/LiveRecorder.Infrastructure/Persistence/DatabaseInitializer.cs
index b6a12f5..f5d88e8 100644
--- a/src/LiveRecorder.Infrastructure/Persistence/DatabaseInitializer.cs
+++ b/src/LiveRecorder.Infrastructure/Persistence/DatabaseInitializer.cs
@@ -61,6 +61,9 @@ public sealed class DatabaseInitializer
             ["event_scripts.live_ended.path"] = string.Empty,
             ["event_scripts.segment_completed.path"] = string.Empty,
             ["event_scripts.timeout_seconds"] = "60",
+            ["retention.cleanup.enabled"] = "False",
+            ["retention.cleanup.days"] = "30",
+            ["retention.cleanup.delete_files"] = "False",
             ["notification.email.enabled"] = "False",
             ["notification.email.smtp_host"] = string.Empty,
             ["notification.email.smtp_port"] = "587",
@@ -103,6 +106,12 @@ public sealed class DatabaseInitializer
   <div style="margin-top: 16px; padding: 12px 14px; border-radius: 8px; background: #f5f5f5; white-space: pre-wrap;">{{detail}}</div>
 </div>
 """,
+            ["notification.webhook.enabled"] = "False",
+            ["notification.webhook.url"] = string.Empty,
+            ["notification.webhook.headers"] = string.Empty,
+            ["notification.webhook.timeout_seconds"] = "15",
+            ["notification.webhook.notify_live_started"] = "True",
+            ["notification.webhook.notify_exception"] = "True",
             ["douyin.user_agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36",
             ["douyin.referer"] = "https://live.douyin.com/",
             ["douyin.cookie"] = string.Empty
@@ -158,6 +167,10 @@ public sealed class DatabaseInitializer
         await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN DanmakuIncludeNonChatEventsOverride INTEGER NULL;", cancellationToken);
         await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN DanmakuMinPollIntervalMillisecondsOverride INTEGER NULL;", cancellationToken);
         await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN DanmakuRetryDelayMaxSecondsOverride INTEGER NULL;", cancellationToken);
+        await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN LastAutoStartDecisionCode TEXT NULL;", cancellationToken);
+        await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN LastAutoStartDecisionSummary TEXT NULL;", cancellationToken);
+        await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN LastAutoStartDecisionDetail TEXT NULL;", cancellationToken);
+        await ExecuteAddColumnAsync("ALTER TABLE LiveRooms ADD COLUMN LastAutoStartDecisionAt TEXT NULL;", cancellationToken);
 
         await _dbContext.Database.ExecuteSqlRawAsync(
             """
diff --git a/src/LiveRecorder.Infrastructure/Persistence/LiveRecorderDbContext.cs b/src/LiveRecorder.Infrastructure/Persistence/LiveRecorderDbContext.cs
index 76c5831..c7a91ae 100644
--- a/src/LiveRecorder.Infrastructure/Persistence/LiveRecorderDbContext.cs
+++ b/src/LiveRecorder.Infrastructure/Persistence/LiveRecorderDbContext.cs
@@ -48,6 +48,9 @@ public sealed class LiveRecorderDbContext : DbContext, IUnitOfWork
             builder.Property(static x => x.OutputFormatOverride).HasConversion<int?>();
             builder.Property(static x => x.SaveModeOverride).HasConversion<int?>();
             builder.Property(static x => x.RecordingTemplateOverride).HasConversion<int?>();
+            builder.Property(static x => x.LastAutoStartDecisionCode).HasMaxLength(64);
+            builder.Property(static x => x.LastAutoStartDecisionSummary).HasMaxLength(256);
+            builder.Property(static x => x.LastAutoStartDecisionDetail).HasMaxLength(2048);
             builder.Property(static x => x.IsEnabled).HasDefaultValue(true);
             builder.Property(static x => x.HasSentLiveNotificationForCurrentSession).HasDefaultValue(false);
         });
diff --git a/src/LiveRecorder.Infrastructure/Persistence/Repositories/Repositories.cs b/src/LiveRecorder.Infrastructure/Persistence/Repositories/Repositories.cs
index c4c16c2..9cda474 100644
--- a/src/LiveRecorder.Infrastructure/Persistence/Repositories/Repositories.cs
+++ b/src/LiveRecorder.Infrastructure/Persistence/Repositories/Repositories.cs
@@ -225,6 +225,9 @@ public sealed class SystemLogRepository : ISystemLogRepository
     public Task AddAsync(SystemLogEntry entry, CancellationToken cancellationToken = default) =>
         _dbContext.SystemLogEntries.AddAsync(entry, cancellationToken).AsTask();
 
+    public async Task<IReadOnlyList<SystemLogEntry>> ListAllAsync(CancellationToken cancellationToken = default) =>
+        await _dbContext.SystemLogEntries.AsNoTracking().ToListAsync(cancellationToken);
+
     public async Task<IReadOnlyList<SystemLogEntry>> ListByRecordTaskIdsAsync(
         IReadOnlyCollection<Guid> recordTaskIds,
         CancellationToken cancellationToken = default)
diff --git a/src/LiveRecorder.Infrastructure/Services/EventScriptService.cs b/src/LiveRecorder.Infrastructure/Services/EventScriptService.cs
index 8edcd01..082e9a3 100644
--- a/src/LiveRecorder.Infrastructure/Services/EventScriptService.cs
+++ b/src/LiveRecorder.Infrastructure/Services/EventScriptService.cs
@@ -11,6 +11,10 @@ namespace LiveRecorder.Infrastructure.Services;
 
 public sealed class EventScriptService : IEventScriptService
 {
+    private const string ScriptLogPathEnvironmentVariable = "LIVE_RECORDER_SCRIPT_LOG_PATH";
+    private const int SystemLogDetailMaxLength = 4000;
+    private const string TruncatedDetailSuffix = "... [truncated to fit system log detail limit]";
+
     private readonly ISystemSettingsService _settingsService;
     private readonly ISystemLogService _systemLogService;
     private readonly ILogger<EventScriptService> _logger;
@@ -38,6 +42,7 @@ public sealed class EventScriptService : IEventScriptService
             settings.EventScriptTimeoutSeconds,
             "live_started",
             environment,
+            "Script",
             liveRoom.Id,
             recordSessionId: null,
             recordTaskId: null,
@@ -57,6 +62,7 @@ public sealed class EventScriptService : IEventScriptService
             settings.EventScriptTimeoutSeconds,
             "live_ended",
             environment,
+            "Script",
             liveRoom.Id,
             recordSessionId: null,
             recordTaskId: null,
@@ -93,12 +99,61 @@ public sealed class EventScriptService : IEventScriptService
             settings.EventScriptTimeoutSeconds,
             "segment_completed",
             environment,
+            "Script",
             liveRoom?.Id ?? recordSession.LiveRoomId,
             recordSession.Id,
             recordTask.Id,
             cancellationToken);
     }
 
+    public async Task<EventScriptTestResultDto> TestAsync(
+        TestEventScriptRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        var eventName = NormalizeEventType(request.EventType);
+        if (eventName is null)
+        {
+            var result = new EventScriptTestResultDto
+            {
+                Success = false,
+                Message = "Unsupported event script test type.",
+                Detail = request.EventType
+            };
+
+            await _systemLogService.WriteAsync(
+                SystemLogLevel.Warning,
+                "ScriptTest",
+                result.Message,
+                result.Detail,
+                cancellationToken: cancellationToken);
+
+            return result;
+        }
+
+        var outcome = await ExecuteAsync(
+            request.ScriptMode,
+            request.ScriptPath,
+            request.ScriptContent,
+            request.TimeoutSeconds,
+            eventName,
+            BuildTestEnvironment(eventName, DateTimeOffset.UtcNow),
+            "ScriptTest",
+            liveRoomId: null,
+            recordSessionId: null,
+            recordTaskId: null,
+            cancellationToken);
+
+        return new EventScriptTestResultDto
+        {
+            Success = outcome.Success,
+            Message = outcome.Message,
+            Detail = outcome.Detail,
+            CustomLogOutput = outcome.CustomLogOutput
+        };
+    }
+
     private async Task RunAsync(
         bool enabled,
         string scriptMode,
@@ -107,6 +162,7 @@ public sealed class EventScriptService : IEventScriptService
         int timeoutSeconds,
         string eventName,
         IReadOnlyDictionary<string, string> environment,
+        string logCategory,
         Guid? liveRoomId,
         Guid? recordSessionId,
         Guid? recordTaskId,
@@ -117,24 +173,70 @@ public sealed class EventScriptService : IEventScriptService
             return;
         }
 
+        await ExecuteAsync(
+            scriptMode,
+            scriptPath,
+            scriptContent,
+            timeoutSeconds,
+            eventName,
+            environment,
+            logCategory,
+            liveRoomId,
+            recordSessionId,
+            recordTaskId,
+            cancellationToken);
+    }
+
+    private async Task<ScriptExecutionOutcome> ExecuteAsync(
+        string scriptMode,
+        string scriptPath,
+        string scriptContent,
+        int timeoutSeconds,
+        string eventName,
+        IReadOnlyDictionary<string, string> environment,
+        string logCategory,
+        Guid? liveRoomId,
+        Guid? recordSessionId,
+        Guid? recordTaskId,
+        CancellationToken cancellationToken)
+    {
         var execution = CreateExecution(scriptMode, scriptPath, scriptContent);
         if (execution is null)
         {
-            return;
-        }
+            var missingConfiguration = new ScriptExecutionOutcome(
+                false,
+                $"Event script was not configured for {eventName}.",
+                null,
+                null);
 
-        if (execution.IsMissing)
-        {
-            await _systemLogService.WriteAsync(
+            await WriteOutcomeLogAsync(
+                missingConfiguration,
+                logCategory,
                 SystemLogLevel.Warning,
-                "Script",
-                $"Event script was not found for {eventName}.",
-                execution.Detail,
                 liveRoomId,
                 recordSessionId,
                 recordTaskId,
                 cancellationToken);
-            return;
+            return missingConfiguration;
+        }
+
+        if (execution.IsMissing)
+        {
+            var missingScript = new ScriptExecutionOutcome(
+                false,
+                $"Event script was not found for {eventName}.",
+                execution.Detail,
+                null);
+
+            await WriteOutcomeLogAsync(
+                missingScript,
+                logCategory,
+                SystemLogLevel.Warning,
+                liveRoomId,
+                recordSessionId,
+                recordTaskId,
+                cancellationToken);
+            return missingScript;
         }
 
         var startInfo = execution.StartInfo!;
@@ -143,12 +245,25 @@ public sealed class EventScriptService : IEventScriptService
             startInfo.Environment[pair.Key] = pair.Value;
         }
 
+        var scriptLogPath = CreateScriptLogPath();
+        try
+        {
+            await File.WriteAllTextAsync(scriptLogPath, string.Empty, CancellationToken.None);
+            startInfo.Environment[ScriptLogPathEnvironmentVariable] = scriptLogPath;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to prepare event script log file for {EventName}", eventName);
+        }
+
         using var process = new Process
         {
             StartInfo = startInfo,
             EnableRaisingEvents = true
         };
 
+        ScriptExecutionOutcome outcome;
+        SystemLogLevel outcomeLevel;
         try
         {
             process.Start();
@@ -156,44 +271,59 @@ public sealed class EventScriptService : IEventScriptService
             timeoutCts.CancelAfter(TimeSpan.FromSeconds(Math.Clamp(timeoutSeconds, 1, 3600)));
             await process.WaitForExitAsync(timeoutCts.Token);
 
-            await _systemLogService.WriteAsync(
-                process.ExitCode == 0 ? SystemLogLevel.Info : SystemLogLevel.Warning,
-                "Script",
+            outcome = new ScriptExecutionOutcome(
+                process.ExitCode == 0,
                 process.ExitCode == 0
                     ? $"Event script completed for {eventName}."
                     : $"Event script exited with code {process.ExitCode} for {eventName}.",
                 execution.Detail,
-                liveRoomId,
-                recordSessionId,
-                recordTaskId,
-                cancellationToken);
+                null);
+            outcomeLevel = process.ExitCode == 0 ? SystemLogLevel.Info : SystemLogLevel.Warning;
         }
         catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
         {
             TryKill(process);
-            await _systemLogService.WriteAsync(
-                SystemLogLevel.Warning,
-                "Script",
+            outcome = new ScriptExecutionOutcome(
+                false,
                 $"Event script timed out for {eventName}.",
                 execution.Detail,
-                liveRoomId,
-                recordSessionId,
-                recordTaskId,
-                CancellationToken.None);
+                null);
+            outcomeLevel = SystemLogLevel.Warning;
         }
         catch (Exception ex)
         {
             _logger.LogWarning(ex, "Event script failed for {EventName}", eventName);
-            await _systemLogService.WriteAsync(
-                SystemLogLevel.Warning,
-                "Script",
+            outcome = new ScriptExecutionOutcome(
+                false,
                 $"Event script failed for {eventName}.",
                 ex.ToString(),
-                liveRoomId,
-                recordSessionId,
-                recordTaskId,
-                cancellationToken);
+                null);
+            outcomeLevel = SystemLogLevel.Warning;
         }
+        finally
+        {
+            // Any script-provided text is persisted and surfaced separately from the execution outcome.
+        }
+
+        var customLogOutput = await TryWriteCustomLogOutputAsync(
+            eventName,
+            logCategory,
+            scriptLogPath,
+            liveRoomId,
+            recordSessionId,
+            recordTaskId);
+        TryDeleteFile(scriptLogPath);
+
+        outcome = outcome with { CustomLogOutput = customLogOutput };
+        await WriteOutcomeLogAsync(
+            outcome,
+            logCategory,
+            outcomeLevel,
+            liveRoomId,
+            recordSessionId,
+            recordTaskId,
+            cancellationToken);
+        return outcome;
     }
 
     private static EventScriptExecution? CreateExecution(string scriptMode, string scriptPath, string scriptContent)
@@ -237,6 +367,47 @@ public sealed class EventScriptService : IEventScriptService
         };
     }
 
+    private static IReadOnlyDictionary<string, string> BuildTestEnvironment(string eventName, DateTimeOffset occurredAt)
+    {
+        var environment = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["LIVE_RECORDER_EVENT"] = eventName,
+            ["LIVE_RECORDER_PLATFORM"] = "Douyin",
+            ["LIVE_RECORDER_LIVE_ROOM_ID"] = "6f73a2f2-1d4c-4e7a-a9b1-3d29d54ed901",
+            ["LIVE_RECORDER_ROOM_ID"] = "676493068539",
+            ["LIVE_RECORDER_TITLE"] = "Sample live title",
+            ["LIVE_RECORDER_ANCHOR"] = "Sample anchor",
+            ["LIVE_RECORDER_SOURCE_URL"] = "https://live.douyin.com/676493068539",
+            ["LIVE_RECORDER_OCCURRED_AT_UTC"] = occurredAt.ToString("O")
+        };
+
+        if (string.Equals(eventName, "segment_completed", StringComparison.OrdinalIgnoreCase))
+        {
+            environment["LIVE_RECORDER_RECORD_SESSION_ID"] = "8e2e9c64-b8f6-4d15-b6cb-1d4ce0adab77";
+            environment["LIVE_RECORDER_RECORD_TASK_ID"] = "2a4810a2-7ef4-4a22-90d4-0211b90cc54c";
+            environment["LIVE_RECORDER_SEGMENT_INDEX"] = "1";
+            environment["LIVE_RECORDER_SEGMENT_FILE_PATH"] = "/app/records/Douyin/Sample Anchor/2026-04-25/203000_Sample live title__00001.mp4";
+            environment["LIVE_RECORDER_DANMAKU_FILE_PATH"] = "/app/records/Douyin/Sample Anchor/2026-04-25/203000_Sample live title__00001.xml";
+            environment["LIVE_RECORDER_DURATION_SECONDS"] = "2185.1";
+            environment["LIVE_RECORDER_FILE_SIZE_BYTES"] = "734003200";
+            environment["LIVE_RECORDER_TASK_STATUS"] = "Completed";
+            environment["LIVE_RECORDER_SESSION_STATUS"] = "Completed";
+        }
+
+        return environment;
+    }
+
+    private static string? NormalizeEventType(string? eventType)
+    {
+        return eventType?.Trim().ToLowerInvariant() switch
+        {
+            "live_started" => "live_started",
+            "live_ended" => "live_ended",
+            "segment_completed" => "segment_completed",
+            _ => null
+        };
+    }
+
     private static ProcessStartInfo CreateStartInfo(string scriptPath)
     {
         var extension = Path.GetExtension(scriptPath);
@@ -330,6 +501,85 @@ public sealed class EventScriptService : IEventScriptService
         return new FileInfo(normalizedPath).Length.ToString();
     }
 
+    private async Task<string?> TryWriteCustomLogOutputAsync(
+        string eventName,
+        string logCategory,
+        string scriptLogPath,
+        Guid? liveRoomId,
+        Guid? recordSessionId,
+        Guid? recordTaskId)
+    {
+        if (string.IsNullOrWhiteSpace(scriptLogPath) || !File.Exists(scriptLogPath))
+        {
+            return null;
+        }
+
+        try
+        {
+            var output = await File.ReadAllTextAsync(scriptLogPath, CancellationToken.None);
+            var trimmedOutput = output.Trim();
+            if (string.IsNullOrWhiteSpace(trimmedOutput))
+            {
+                return null;
+            }
+
+            await _systemLogService.WriteAsync(
+                SystemLogLevel.Info,
+                logCategory,
+                $"Event script emitted custom log output for {eventName}.",
+                TruncateSystemLogDetail(trimmedOutput),
+                liveRoomId,
+                recordSessionId,
+                recordTaskId,
+                CancellationToken.None);
+
+            return trimmedOutput;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to collect event script custom log output for {EventName}", eventName);
+            return null;
+        }
+    }
+
+    private async Task WriteOutcomeLogAsync(
+        ScriptExecutionOutcome outcome,
+        string logCategory,
+        SystemLogLevel level,
+        Guid? liveRoomId,
+        Guid? recordSessionId,
+        Guid? recordTaskId,
+        CancellationToken cancellationToken)
+    {
+        await _systemLogService.WriteAsync(
+            level,
+            logCategory,
+            outcome.Message,
+            outcome.Detail,
+            liveRoomId,
+            recordSessionId,
+            recordTaskId,
+            cancellationToken);
+    }
+
+    private static string CreateScriptLogPath()
+    {
+        return Path.Combine(
+            Path.GetTempPath(),
+            $"live-recorder-script-log-{Guid.NewGuid():N}.txt");
+    }
+
+    private static string TruncateSystemLogDetail(string detail)
+    {
+        if (detail.Length <= SystemLogDetailMaxLength)
+        {
+            return detail;
+        }
+
+        var prefixLength = Math.Max(0, SystemLogDetailMaxLength - TruncatedDetailSuffix.Length);
+        return string.Concat(detail[..prefixLength], TruncatedDetailSuffix);
+    }
+
     private static void TryKill(Process process)
     {
         try
@@ -344,5 +594,25 @@ public sealed class EventScriptService : IEventScriptService
         }
     }
 
+    private static void TryDeleteFile(string path)
+    {
+        try
+        {
+            if (!string.IsNullOrWhiteSpace(path) && File.Exists(path))
+            {
+                File.Delete(path);
+            }
+        }
+        catch
+        {
+        }
+    }
+
     private sealed record EventScriptExecution(ProcessStartInfo? StartInfo, string Detail, bool IsMissing = false);
+
+    private sealed record ScriptExecutionOutcome(
+        bool Success,
+        string Message,
+        string? Detail,
+        string? CustomLogOutput);
 }
diff --git a/src/LiveRecorder.Infrastructure/Services/FfmpegService.Runtime.cs b/src/LiveRecorder.Infrastructure/Services/FfmpegService.Runtime.cs
index e9373d1..9170e8a 100644
--- a/src/LiveRecorder.Infrastructure/Services/FfmpegService.Runtime.cs
+++ b/src/LiveRecorder.Infrastructure/Services/FfmpegService.Runtime.cs
@@ -649,6 +649,7 @@ public sealed partial class FfmpegService
         var logService = scope.ServiceProvider.GetRequiredService<ISystemLogService>();
         var settingsService = scope.ServiceProvider.GetRequiredService<ISystemSettingsService>();
         var emailNotificationService = scope.ServiceProvider.GetRequiredService<IEmailNotificationService>();
+        var webhookNotificationService = scope.ServiceProvider.GetRequiredService<IWebhookNotificationService>();
         var settings = await settingsService.GetAsync();
 
         var session = await dbContext.RecordSessions
@@ -783,6 +784,12 @@ public sealed partial class FfmpegService
                 $"exitCode={process.ExitCode}; output={effectiveOutputPath}",
                 session.LiveRoom,
                 currentTask);
+            await webhookNotificationService.SendExceptionAsync(
+                "FFmpeg",
+                "Recording session exited abnormally.",
+                $"exitCode={process.ExitCode}; output={effectiveOutputPath}",
+                session.LiveRoom,
+                currentTask);
         }
     }
 
diff --git a/src/LiveRecorder.Infrastructure/Services/LiveRoomPollingBackgroundService.cs b/src/LiveRecorder.Infrastructure/Services/LiveRoomPollingBackgroundService.cs
index bfdaba0..1e5ee39 100644
--- a/src/LiveRecorder.Infrastructure/Services/LiveRoomPollingBackgroundService.cs
+++ b/src/LiveRecorder.Infrastructure/Services/LiveRoomPollingBackgroundService.cs
@@ -1,4 +1,5 @@
 using System.Collections.Concurrent;
+using LiveRecorder.Application.Common;
 using LiveRecorder.Application.Abstractions.Logging;
 using LiveRecorder.Application.Abstractions.Notifications;
 using LiveRecorder.Application.Abstractions.Platforms;
@@ -95,6 +96,7 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
                     using var notificationScope = _serviceScopeFactory.CreateScope();
                     var logService = notificationScope.ServiceProvider.GetRequiredService<ISystemLogService>();
                     var emailNotificationService = notificationScope.ServiceProvider.GetRequiredService<IEmailNotificationService>();
+                    var webhookNotificationService = notificationScope.ServiceProvider.GetRequiredService<IWebhookNotificationService>();
                     await logService.WriteAsync(
                         SystemLogLevel.Error,
                         "Scheduler",
@@ -108,6 +110,11 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
                             "Background live room polling failed.",
                             ex.ToString(),
                             cancellationToken: stoppingToken);
+                        await webhookNotificationService.SendExceptionAsync(
+                            "Scheduler",
+                            "Background live room polling failed.",
+                            ex.ToString(),
+                            cancellationToken: stoppingToken);
                     }
                 }
                 catch (Exception notificationEx)
@@ -133,6 +140,7 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
         var liveRoomStatusService = scope.ServiceProvider.GetRequiredService<LiveRoomStatusService>();
         var logService = scope.ServiceProvider.GetRequiredService<ISystemLogService>();
         var emailNotificationService = scope.ServiceProvider.GetRequiredService<IEmailNotificationService>();
+        var webhookNotificationService = scope.ServiceProvider.GetRequiredService<IWebhookNotificationService>();
         var storageGuardService = scope.ServiceProvider.GetRequiredService<IStorageGuardService>();
 
         var liveRoom = await dbContext.LiveRooms.FirstOrDefaultAsync(item => item.Id == liveRoomId, cancellationToken);
@@ -175,12 +183,26 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
 
             if (!settings.AutoStartRecordingOnLive)
             {
+                await UpdateAutoStartDecisionAsync(
+                    dbContext,
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedDisabled,
+                    "Auto-start skipped because automatic start is disabled.",
+                    detail: null,
+                    cancellationToken);
                 return;
             }
 
             var startCheck = storageGuardService.CheckCanStartOrResume(settings);
             if (!startCheck.HasEnoughSpace)
             {
+                await UpdateAutoStartDecisionAsync(
+                    dbContext,
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedStorage,
+                    "Auto-start skipped because storage is below threshold.",
+                    startCheck.Message,
+                    cancellationToken);
                 await logService.WriteAsync(
                     SystemLogLevel.Warning,
                     "Storage",
@@ -216,6 +238,13 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
 
             if (hasRunningSession)
             {
+                await UpdateAutoStartDecisionAsync(
+                    dbContext,
+                    liveRoom,
+                    AutoStartDecisionCodes.SkippedActiveSession,
+                    "Auto-start skipped because an active recording session already exists.",
+                    detail: null,
+                    cancellationToken);
                 await logService.WriteAsync(
                     SystemLogLevel.Info,
                     "Scheduler",
@@ -238,6 +267,7 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
                 {
                     LiveRoomId = liveRoom.Id
                 },
+                trackAutoStartDecision: true,
                 cancellationToken);
         }
         catch (Exception ex)
@@ -263,6 +293,12 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
                     ex.ToString(),
                     liveRoom,
                     cancellationToken: cancellationToken);
+                await webhookNotificationService.SendExceptionAsync(
+                    "Scheduler",
+                    "Background polling failed for a live room.",
+                    ex.ToString(),
+                    liveRoom,
+                    cancellationToken: cancellationToken);
             }
         }
     }
@@ -515,6 +551,22 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
         return exception.InnerException is not null && IsSqliteStorageFullException(exception.InnerException);
     }
 
+    private static async Task UpdateAutoStartDecisionAsync(
+        LiveRecorderDbContext dbContext,
+        Domain.Entities.LiveRoom liveRoom,
+        string code,
+        string summary,
+        string? detail,
+        CancellationToken cancellationToken)
+    {
+        liveRoom.SetLastAutoStartDecision(
+            Truncate(code, 64),
+            Truncate(summary, 256),
+            Truncate(detail, 2048),
+            DateTimeOffset.UtcNow);
+        await SaveChangesWithRetryAsync(dbContext, cancellationToken);
+    }
+
     private static async Task SaveChangesWithRetryAsync(LiveRecorderDbContext dbContext, CancellationToken cancellationToken)
     {
         for (var attempt = 1; attempt <= 5; attempt++)
@@ -539,4 +591,15 @@ public sealed class LiveRoomPollingBackgroundService : BackgroundService
         exception.SqliteErrorCode is 5 or 6 ||
         exception.Message.Contains("database is locked", StringComparison.OrdinalIgnoreCase) ||
         exception.Message.Contains("database table is locked", StringComparison.OrdinalIgnoreCase);
+
+    private static string? Truncate(string? value, int maxLength)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return null;
+        }
+
+        var trimmed = value.Trim();
+        return trimmed.Length <= maxLength ? trimmed : trimmed[..maxLength];
+    }
 }
diff --git a/src/LiveRecorder.Infrastructure/Services/RecoveryService.cs b/src/LiveRecorder.Infrastructure/Services/RecoveryService.cs
new file mode 100644
index 0000000..46d0bbc
--- /dev/null
+++ b/src/LiveRecorder.Infrastructure/Services/RecoveryService.cs
@@ -0,0 +1,437 @@
+using LiveRecorder.Application.Abstractions.Recording;
+using LiveRecorder.Application.Abstractions.Settings;
+using LiveRecorder.Application.Abstractions.Storage;
+using LiveRecorder.Application.Common;
+using LiveRecorder.Application.Models.Recovery;
+using LiveRecorder.Application.Models.RecordTasks;
+using LiveRecorder.Application.Services;
+using LiveRecorder.Domain.Entities;
+using LiveRecorder.Domain.Enums;
+using LiveRecorder.Infrastructure.Persistence;
+using Microsoft.EntityFrameworkCore;
+
+namespace LiveRecorder.Infrastructure.Services;
+
+public sealed class RecoveryService
+{
+    private readonly LiveRecorderDbContext _dbContext;
+    private readonly ISystemSettingsService _systemSettingsService;
+    private readonly IStorageGuardService _storageGuardService;
+    private readonly IFfmpegService _ffmpegService;
+    private readonly RecordService _recordService;
+
+    public RecoveryService(
+        LiveRecorderDbContext dbContext,
+        ISystemSettingsService systemSettingsService,
+        IStorageGuardService storageGuardService,
+        IFfmpegService ffmpegService,
+        RecordService recordService)
+    {
+        _dbContext = dbContext;
+        _systemSettingsService = systemSettingsService;
+        _storageGuardService = storageGuardService;
+        _ffmpegService = ffmpegService;
+        _recordService = recordService;
+    }
+
+    public async Task<RecoveryOverviewDto> GetOverviewAsync(CancellationToken cancellationToken = default)
+    {
+        var settings = await _systemSettingsService.GetAsync(cancellationToken);
+        var storage = _storageGuardService.CheckCanStartOrResume(settings);
+        var liveRooms = await ListRecoverableLiveRoomsAsync(cancellationToken);
+        var finalizations = await ListRecoverableFinalizationsAsync(cancellationToken);
+
+        return new RecoveryOverviewDto
+        {
+            Storage = new StorageGuardStatusDto
+            {
+                IsEnabled = storage.IsEnabled,
+                HasEnoughSpace = storage.HasEnoughSpace,
+                CheckedPath = storage.CheckedPath,
+                AvailableBytes = storage.AvailableBytes,
+                RequiredBytes = storage.RequiredBytes,
+                Message = storage.Message
+            },
+            LiveRooms = liveRooms,
+            Finalizations = finalizations
+        };
+    }
+
+    public async Task<RecoveryActionResultDto> RetryLiveRoomAsync(Guid liveRoomId, CancellationToken cancellationToken = default)
+    {
+        var room = await _dbContext.LiveRooms.FirstOrDefaultAsync(item => item.Id == liveRoomId, cancellationToken);
+        if (room is null)
+        {
+            return FailureResult("Live room was not found.");
+        }
+
+        if (!room.IsEnabled)
+        {
+            return FailureResult("Live room is disabled and cannot be retried.");
+        }
+
+        if (room.AvailabilityStatus != LiveRoomAvailabilityStatus.Live)
+        {
+            return FailureResult("Live room is not currently online.");
+        }
+
+        var hasActiveSession = await _dbContext.RecordSessions.AnyAsync(
+            item => item.LiveRoomId == room.Id &&
+                    (item.Status == RecordSessionStatus.Starting ||
+                     item.Status == RecordSessionStatus.Running ||
+                     item.Status == RecordSessionStatus.Stopping),
+            cancellationToken);
+
+        if (hasActiveSession)
+        {
+            room.SetLastAutoStartDecision(
+                AutoStartDecisionCodes.SkippedActiveSession,
+                "Auto-start skipped because an active recording session already exists.",
+                null,
+                DateTimeOffset.UtcNow);
+            await _dbContext.SaveChangesAsync(cancellationToken);
+            return FailureResult("An active recording session already exists for this live room.");
+        }
+
+        try
+        {
+            var task = await _recordService.StartAsync(
+                new StartRecordTaskRequest
+                {
+                    LiveRoomId = liveRoomId
+                },
+                trackAutoStartDecision: true,
+                cancellationToken);
+
+            var started = task.Status is RecordTaskStatus.Starting or RecordTaskStatus.Running;
+            return new RecoveryActionResultDto
+            {
+                RequestedCount = 1,
+                SuccessCount = started ? 1 : 0,
+                FailedCount = started ? 0 : 1,
+                Messages =
+                [
+                    started
+                        ? $"Recording retry started for room {room.RoomId}."
+                        : $"Recording retry did not start for room {room.RoomId}. Status={task.Status}; Error={task.ErrorMessage ?? "n/a"}"
+                ]
+            };
+        }
+        catch (Exception ex)
+        {
+            return FailureResult($"Recording retry failed for room {room.RoomId}: {ex.Message}");
+        }
+    }
+
+    public async Task<RecoveryActionResultDto> RetryAllLiveRoomsAsync(CancellationToken cancellationToken = default)
+    {
+        var liveRooms = await ListRecoverableLiveRoomsAsync(cancellationToken);
+        if (liveRooms.Count == 0)
+        {
+            return new RecoveryActionResultDto
+            {
+                RequestedCount = 0,
+                SuccessCount = 0,
+                FailedCount = 0,
+                Messages = ["No live rooms currently require retry."]
+            };
+        }
+
+        var messages = new List<string>();
+        var successCount = 0;
+        foreach (var item in liveRooms)
+        {
+            var result = await RetryLiveRoomAsync(item.LiveRoomId, cancellationToken);
+            successCount += result.SuccessCount;
+            messages.AddRange(result.Messages);
+        }
+
+        return new RecoveryActionResultDto
+        {
+            RequestedCount = liveRooms.Count,
+            SuccessCount = successCount,
+            FailedCount = liveRooms.Count - successCount,
+            Messages = messages
+        };
+    }
+
+    public async Task<RecoveryActionResultDto> ResumeFinalizationAsync(Guid recordTaskId, CancellationToken cancellationToken = default)
+    {
+        var started = await _ffmpegService.StartManualFinalizeTaskAsync(recordTaskId, cancellationToken);
+        return new RecoveryActionResultDto
+        {
+            RequestedCount = 1,
+            SuccessCount = started ? 1 : 0,
+            FailedCount = started ? 0 : 1,
+            Messages =
+            [
+                started
+                    ? $"MP4 finalization resumed for task {recordTaskId}."
+                    : $"MP4 finalization could not be resumed for task {recordTaskId}."
+            ]
+        };
+    }
+
+    public async Task<RecoveryActionResultDto> ResumeAllFinalizationsAsync(CancellationToken cancellationToken = default)
+    {
+        var finalizations = await ListRecoverableFinalizationsAsync(cancellationToken);
+        if (finalizations.Count == 0)
+        {
+            return new RecoveryActionResultDto
+            {
+                RequestedCount = 0,
+                SuccessCount = 0,
+                FailedCount = 0,
+                Messages = ["No MP4 finalization tasks currently require recovery."]
+            };
+        }
+
+        var successCount = 0;
+        var messages = new List<string>();
+        foreach (var item in finalizations)
+        {
+            var started = await _ffmpegService.StartManualFinalizeTaskAsync(item.RecordTaskId, cancellationToken);
+            if (started)
+            {
+                successCount++;
+            }
+
+            messages.Add(
+                started
+                    ? $"MP4 finalization resumed for task {item.RecordTaskId}."
+                    : $"MP4 finalization could not be resumed for task {item.RecordTaskId}.");
+        }
+
+        return new RecoveryActionResultDto
+        {
+            RequestedCount = finalizations.Count,
+            SuccessCount = successCount,
+            FailedCount = finalizations.Count - successCount,
+            Messages = messages
+        };
+    }
+
+    private async Task<IReadOnlyList<RecoverableLiveRoomDto>> ListRecoverableLiveRoomsAsync(CancellationToken cancellationToken)
+    {
+        var activeLiveRoomIds = await _dbContext.RecordSessions
+            .AsNoTracking()
+            .Where(item => item.Status == RecordSessionStatus.Starting ||
+                           item.Status == RecordSessionStatus.Running ||
+                           item.Status == RecordSessionStatus.Stopping)
+            .Select(item => item.LiveRoomId)
+            .Distinct()
+            .ToListAsync(cancellationToken);
+
+        var rooms = await _dbContext.LiveRooms
+            .AsNoTracking()
+            .Where(item => item.IsEnabled &&
+                           item.AvailabilityStatus == LiveRoomAvailabilityStatus.Live &&
+                           item.LastAutoStartDecisionCode != AutoStartDecisionCodes.Started)
+            .ToListAsync(cancellationToken);
+
+        return rooms
+            .Where(item => !activeLiveRoomIds.Contains(item.Id))
+            .OrderByDescending(item => item.LastAutoStartDecisionAt ?? item.LastCheckedAt ?? item.UpdatedAt)
+            .Select(item => new RecoverableLiveRoomDto
+            {
+                LiveRoomId = item.Id,
+                PlatformName = item.Platform.ToString(),
+                RoomId = item.RoomId,
+                Title = item.Title,
+                AnchorName = item.AnchorName,
+                LastAutoStartDecisionCode = item.LastAutoStartDecisionCode,
+                LastAutoStartDecisionSummary = item.LastAutoStartDecisionSummary,
+                LastAutoStartDecisionDetail = item.LastAutoStartDecisionDetail,
+                LastAutoStartDecisionAt = item.LastAutoStartDecisionAt,
+                LastCheckedAt = item.LastCheckedAt
+            })
+            .ToList();
+    }
+
+    private async Task<IReadOnlyList<RecoverableFinalizationDto>> ListRecoverableFinalizationsAsync(CancellationToken cancellationToken)
+    {
+        var tasks = await _dbContext.RecordTasks
+            .AsNoTracking()
+            .Include(item => item.LiveRoom)
+            .Include(item => item.RecordSession)
+            .Include(item => item.Result)
+            .Where(item => item.OutputFormat == RecordOutputFormat.Mp4 &&
+                           item.RecordSession != null)
+            .ToListAsync(cancellationToken);
+
+        return tasks
+            .Where(IsRecoverableFinalization)
+            .OrderByDescending(item => item.UpdatedAt)
+            .Select(item => new RecoverableFinalizationDto
+            {
+                RecordTaskId = item.Id,
+                RecordSessionId = item.RecordSessionId,
+                LiveRoomId = item.LiveRoomId,
+                LiveRoomTitle = item.LiveRoom?.Title ?? item.LiveRoom?.AnchorName ?? item.LiveRoom?.RoomId ?? item.LiveRoomId.ToString(),
+                RoomId = item.LiveRoom?.RoomId ?? "-",
+                PlatformName = item.LiveRoom?.Platform.ToString() ?? "Unknown",
+                SegmentIndex = item.SegmentIndex,
+                Status = item.Status,
+                OutputFilePath = item.OutputFilePath,
+                Reason = BuildFinalizationReason(item),
+                CreatedAt = item.CreatedAt,
+                EndedAt = item.EndedAt
+            })
+            .ToList();
+    }
+
+    private static bool IsRecoverableFinalization(RecordTask recordTask)
+    {
+        if (recordTask.RecordSession is null ||
+            recordTask.OutputFormat != RecordOutputFormat.Mp4)
+        {
+            return false;
+        }
+
+        if (recordTask.Status == RecordTaskStatus.Processing)
+        {
+            return true;
+        }
+
+        if (recordTask.Status is RecordTaskStatus.Starting or RecordTaskStatus.Running or RecordTaskStatus.Stopping)
+        {
+            return false;
+        }
+
+        if (recordTask.RecordSession.Status is RecordSessionStatus.Starting or RecordSessionStatus.Running or RecordSessionStatus.Stopping)
+        {
+            return false;
+        }
+
+        if (string.IsNullOrWhiteSpace(recordTask.OutputFilePath))
+        {
+            return false;
+        }
+
+        var recorderOutputPath = ResolveManualFinalizeSourcePath(recordTask, recordTask.RecordSession);
+        if (!File.Exists(recorderOutputPath))
+        {
+            return false;
+        }
+
+        if (recordTask.Status == RecordTaskStatus.Completed)
+        {
+            var finalOutputPath = NormalizeAbsolutePath(recordTask.OutputFilePath);
+            return !HasUsableOutput(finalOutputPath, CalculateFileSize(finalOutputPath));
+        }
+
+        return true;
+    }
+
+    private static string BuildFinalizationReason(RecordTask recordTask)
+    {
+        if (recordTask.Status == RecordTaskStatus.Processing)
+        {
+            return string.IsNullOrWhiteSpace(recordTask.ErrorMessage)
+                ? "MP4 finalization is queued or paused and can be resumed."
+                : recordTask.ErrorMessage!;
+        }
+
+        if (recordTask.Status == RecordTaskStatus.Completed)
+        {
+            return "The final MP4 output is missing, but the intermediate recording file is still available.";
+        }
+
+        return "Manual MP4 finalization can be retried from the intermediate recording file.";
+    }
+
+    private static string ResolveManualFinalizeSourcePath(RecordTask recordTask, RecordSession recordSession)
+    {
+        var resultPath = recordTask.Result?.FilePath;
+        if (!string.IsNullOrWhiteSpace(resultPath) &&
+            resultPath.EndsWith(".ts", StringComparison.OrdinalIgnoreCase))
+        {
+            var normalizedResultPath = NormalizeAbsolutePath(resultPath);
+            if (File.Exists(normalizedResultPath))
+            {
+                return normalizedResultPath;
+            }
+        }
+
+        return NormalizeAbsolutePath(
+            GetRecorderOutputPath(
+                recordTask.OutputFilePath ?? resultPath ?? string.Empty,
+                recordSession.OutputFormat,
+                recordSession.SaveMode));
+    }
+
+    private static string GetRecorderOutputPath(
+        string finalOutputPath,
+        RecordOutputFormat outputFormat,
+        RecordSaveMode saveMode)
+    {
+        if (outputFormat != RecordOutputFormat.Mp4)
+        {
+            return finalOutputPath;
+        }
+
+        if (saveMode == RecordSaveMode.SingleFile)
+        {
+            return Path.Combine(
+                Path.GetDirectoryName(finalOutputPath)!,
+                $"{Path.GetFileNameWithoutExtension(finalOutputPath)}.recording.ts");
+        }
+
+        return Path.ChangeExtension(finalOutputPath, ".ts");
+    }
+
+    private static long? CalculateFileSize(string? outputPath)
+    {
+        if (string.IsNullOrWhiteSpace(outputPath))
+        {
+            return null;
+        }
+
+        if (File.Exists(outputPath))
+        {
+            return new FileInfo(outputPath).Length;
+        }
+
+        if (Directory.Exists(outputPath))
+        {
+            return new DirectoryInfo(outputPath)
+                .EnumerateFiles("*", SearchOption.TopDirectoryOnly)
+                .Sum(static file => file.Length);
+        }
+
+        return null;
+    }
+
+    private static bool HasUsableOutput(string? outputPath, long? fileSize)
+    {
+        if (string.IsNullOrWhiteSpace(outputPath))
+        {
+            return false;
+        }
+
+        if (File.Exists(outputPath))
+        {
+            return fileSize.GetValueOrDefault() > 0;
+        }
+
+        if (Directory.Exists(outputPath))
+        {
+            return Directory.EnumerateFiles(outputPath, "*", SearchOption.TopDirectoryOnly).Any();
+        }
+
+        return false;
+    }
+
+    private static string NormalizeAbsolutePath(string path) =>
+        Path.IsPathRooted(path)
+            ? path
+            : Path.GetFullPath(path, AppContext.BaseDirectory);
+
+    private static RecoveryActionResultDto FailureResult(string message) => new()
+    {
+        RequestedCount = 1,
+        SuccessCount = 0,
+        FailedCount = 1,
+        Messages = [message]
+    };
+}
diff --git a/src/LiveRecorder.Infrastructure/Services/RetentionCleanupBackgroundService.cs b/src/LiveRecorder.Infrastructure/Services/RetentionCleanupBackgroundService.cs
new file mode 100644
index 0000000..539da2d
--- /dev/null
+++ b/src/LiveRecorder.Infrastructure/Services/RetentionCleanupBackgroundService.cs
@@ -0,0 +1,76 @@
+using LiveRecorder.Application.Abstractions.Logging;
+using LiveRecorder.Application.Abstractions.Settings;
+using LiveRecorder.Domain.Enums;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace LiveRecorder.Infrastructure.Services;
+
+public sealed class RetentionCleanupBackgroundService : BackgroundService
+{
+    private static readonly TimeSpan CleanupInterval = TimeSpan.FromHours(24);
+
+    private readonly IServiceScopeFactory _serviceScopeFactory;
+    private readonly ILogger<RetentionCleanupBackgroundService> _logger;
+
+    public RetentionCleanupBackgroundService(
+        IServiceScopeFactory serviceScopeFactory,
+        ILogger<RetentionCleanupBackgroundService> logger)
+    {
+        _serviceScopeFactory = serviceScopeFactory;
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                using var scope = _serviceScopeFactory.CreateScope();
+                var settingsService = scope.ServiceProvider.GetRequiredService<ISystemSettingsService>();
+                var cleanupService = scope.ServiceProvider.GetRequiredService<RetentionCleanupService>();
+                var settings = await settingsService.GetAsync(stoppingToken);
+
+                if (settings.EnableRetentionCleanup)
+                {
+                    await cleanupService.RunAsync(ignoreEnabledSetting: false, stoppingToken);
+                }
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Retention cleanup background task failed");
+
+                try
+                {
+                    using var scope = _serviceScopeFactory.CreateScope();
+                    var logService = scope.ServiceProvider.GetRequiredService<ISystemLogService>();
+                    await logService.WriteAsync(
+                        SystemLogLevel.Error,
+                        "Retention",
+                        "Retention cleanup background task failed.",
+                        ex.ToString(),
+                        cancellationToken: CancellationToken.None);
+                }
+                catch (Exception logEx)
+                {
+                    _logger.LogWarning(logEx, "Failed to persist retention cleanup background error log");
+                }
+            }
+
+            try
+            {
+                await Task.Delay(CleanupInterval, stoppingToken);
+            }
+            catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+            {
+                break;
+            }
+        }
+    }
+}
diff --git a/src/LiveRecorder.Infrastructure/Services/RetentionCleanupService.cs b/src/LiveRecorder.Infrastructure/Services/RetentionCleanupService.cs
new file mode 100644
index 0000000..a48f349
--- /dev/null
+++ b/src/LiveRecorder.Infrastructure/Services/RetentionCleanupService.cs
@@ -0,0 +1,283 @@
+using LiveRecorder.Application.Abstractions.Logging;
+using LiveRecorder.Application.Abstractions.Settings;
+using LiveRecorder.Application.Models.Settings;
+using LiveRecorder.Domain.Entities;
+using LiveRecorder.Domain.Enums;
+using LiveRecorder.Infrastructure.Persistence;
+using Microsoft.EntityFrameworkCore;
+
+namespace LiveRecorder.Infrastructure.Services;
+
+public sealed class RetentionCleanupService
+{
+    private readonly LiveRecorderDbContext _dbContext;
+    private readonly ISystemSettingsService _systemSettingsService;
+    private readonly ISystemLogService _systemLogService;
+
+    public RetentionCleanupService(
+        LiveRecorderDbContext dbContext,
+        ISystemSettingsService systemSettingsService,
+        ISystemLogService systemLogService)
+    {
+        _dbContext = dbContext;
+        _systemSettingsService = systemSettingsService;
+        _systemLogService = systemLogService;
+    }
+
+    public async Task<RetentionCleanupResultDto> RunAsync(
+        bool ignoreEnabledSetting = false,
+        CancellationToken cancellationToken = default)
+    {
+        var settings = await _systemSettingsService.GetAsync(cancellationToken);
+        if (!settings.EnableRetentionCleanup && !ignoreEnabledSetting)
+        {
+            return CreateEmptyResult();
+        }
+
+        var warnings = new List<string>();
+        var deletedFilePaths = new List<string>();
+        var deletedDanmakuPaths = new List<string>();
+        var deletedTaskIds = new HashSet<Guid>();
+        var deletedSessionIds = new HashSet<Guid>();
+        var deletedResultIds = new HashSet<Guid>();
+        var deletedLogIds = new HashSet<Guid>();
+        var cutoff = DateTimeOffset.UtcNow.AddDays(-Math.Max(1, settings.RetentionDays));
+
+        var staleTasks = await _dbContext.RecordTasks
+            .Include(item => item.LiveRoom)
+            .Include(item => item.RecordSession)
+            .Include(item => item.Result)
+            .Where(item => item.CreatedAt < cutoff &&
+                           item.Status != RecordTaskStatus.Starting &&
+                           item.Status != RecordTaskStatus.Running &&
+                           item.Status != RecordTaskStatus.Stopping &&
+                           item.Status != RecordTaskStatus.Processing)
+            .ToListAsync(cancellationToken);
+
+        foreach (var task in staleTasks)
+        {
+            if (settings.RetentionDeleteFiles)
+            {
+                TryDeleteRecordOutput(task, warnings, deletedFilePaths, deletedDanmakuPaths);
+            }
+
+            var taskLogs = await _dbContext.SystemLogEntries
+                .Where(item => item.RecordTaskId == task.Id)
+                .ToListAsync(cancellationToken);
+            foreach (var log in taskLogs)
+            {
+                deletedLogIds.Add(log.Id);
+            }
+
+            if (task.Result is not null)
+            {
+                deletedResultIds.Add(task.Result.Id);
+                _dbContext.RecordResults.Remove(task.Result);
+            }
+
+            if (taskLogs.Count > 0)
+            {
+                _dbContext.SystemLogEntries.RemoveRange(taskLogs);
+            }
+
+            deletedTaskIds.Add(task.Id);
+            _dbContext.RecordTasks.Remove(task);
+        }
+
+        if (deletedTaskIds.Count > 0 || deletedResultIds.Count > 0 || deletedLogIds.Count > 0)
+        {
+            await _dbContext.SaveChangesAsync(cancellationToken);
+        }
+
+        var staleSessions = await _dbContext.RecordSessions
+            .Include(item => item.RecordTasks)
+            .Where(item => item.CreatedAt < cutoff &&
+                           item.Status != RecordSessionStatus.Starting &&
+                           item.Status != RecordSessionStatus.Running &&
+                           item.Status != RecordSessionStatus.Stopping)
+            .ToListAsync(cancellationToken);
+
+        foreach (var session in staleSessions.Where(static item => item.RecordTasks.Count == 0))
+        {
+            var sessionLogs = await _dbContext.SystemLogEntries
+                .Where(item => item.RecordSessionId == session.Id)
+                .ToListAsync(cancellationToken);
+            foreach (var log in sessionLogs)
+            {
+                deletedLogIds.Add(log.Id);
+            }
+
+            if (sessionLogs.Count > 0)
+            {
+                _dbContext.SystemLogEntries.RemoveRange(sessionLogs);
+            }
+
+            deletedSessionIds.Add(session.Id);
+            _dbContext.RecordSessions.Remove(session);
+        }
+
+        var staleGlobalLogs = await _dbContext.SystemLogEntries
+            .Where(item => item.CreatedAt < cutoff)
+            .ToListAsync(cancellationToken);
+        foreach (var log in staleGlobalLogs)
+        {
+            deletedLogIds.Add(log.Id);
+        }
+
+        if (staleGlobalLogs.Count > 0)
+        {
+            _dbContext.SystemLogEntries.RemoveRange(staleGlobalLogs);
+        }
+
+        if (deletedSessionIds.Count > 0 || staleGlobalLogs.Count > 0)
+        {
+            await _dbContext.SaveChangesAsync(cancellationToken);
+        }
+
+        var result = new RetentionCleanupResultDto
+        {
+            DeletedSessionCount = deletedSessionIds.Count,
+            DeletedTaskCount = deletedTaskIds.Count,
+            DeletedResultCount = deletedResultIds.Count,
+            DeletedLogCount = deletedLogIds.Count,
+            DeletedFileCount = deletedFilePaths.Count,
+            DeletedDanmakuFileCount = deletedDanmakuPaths.Count,
+            Warnings = warnings
+        };
+
+        if (deletedSessionIds.Count > 0 ||
+            deletedTaskIds.Count > 0 ||
+            deletedResultIds.Count > 0 ||
+            deletedLogIds.Count > 0 ||
+            deletedFilePaths.Count > 0 ||
+            deletedDanmakuPaths.Count > 0 ||
+            warnings.Count > 0)
+        {
+            await _systemLogService.WriteAsync(
+                SystemLogLevel.Info,
+                "Retention",
+                "Retention cleanup completed.",
+                $"sessions={result.DeletedSessionCount}; tasks={result.DeletedTaskCount}; results={result.DeletedResultCount}; logs={result.DeletedLogCount}; video-files={result.DeletedFileCount}; danmaku-files={result.DeletedDanmakuFileCount}; warnings={warnings.Count}",
+                cancellationToken: cancellationToken);
+        }
+
+        return result;
+    }
+
+    private static RetentionCleanupResultDto CreateEmptyResult() => new()
+    {
+        DeletedSessionCount = 0,
+        DeletedTaskCount = 0,
+        DeletedResultCount = 0,
+        DeletedLogCount = 0,
+        DeletedFileCount = 0,
+        DeletedDanmakuFileCount = 0,
+        Warnings = []
+    };
+
+    private static void TryDeleteRecordOutput(
+        RecordTask recordTask,
+        List<string> warnings,
+        List<string> deletedFilePaths,
+        List<string> deletedDanmakuPaths)
+    {
+        var outputPath = recordTask.Result?.FilePath ?? recordTask.OutputFilePath;
+        if (!string.IsNullOrWhiteSpace(outputPath))
+        {
+            TryDeletePath(outputPath, warnings, deletedFilePaths, $"output for task {recordTask.Id}");
+            TryDeleteIntermediateRecordingArtifacts(outputPath, recordTask.OutputFormat, warnings, deletedFilePaths, recordTask.Id);
+        }
+
+        var danmakuPath = recordTask.Result?.DanmakuFilePath;
+        if (!string.IsNullOrWhiteSpace(danmakuPath))
+        {
+            TryDeletePath(danmakuPath, warnings, deletedDanmakuPaths, $"danmaku for task {recordTask.Id}");
+        }
+    }
+
+    private static void TryDeleteIntermediateRecordingArtifacts(
+        string finalOutputPath,
+        RecordOutputFormat outputFormat,
+        List<string> warnings,
+        List<string> deletedFilePaths,
+        Guid recordTaskId)
+    {
+        if (outputFormat != RecordOutputFormat.Mp4)
+        {
+            return;
+        }
+
+        var absoluteFinalPath = Path.IsPathRooted(finalOutputPath)
+            ? finalOutputPath
+            : Path.GetFullPath(finalOutputPath, AppContext.BaseDirectory);
+
+        var intermediateCandidates = new[]
+        {
+            Path.ChangeExtension(absoluteFinalPath, ".ts"),
+            Path.Combine(
+                Path.GetDirectoryName(absoluteFinalPath) ?? string.Empty,
+                $"{Path.GetFileNameWithoutExtension(absoluteFinalPath)}.recording.ts")
+        };
+
+        foreach (var candidate in intermediateCandidates
+                     .Where(static path => !string.IsNullOrWhiteSpace(path))
+                     .Distinct(StringComparer.OrdinalIgnoreCase))
+        {
+            if (string.Equals(candidate, absoluteFinalPath, StringComparison.OrdinalIgnoreCase) || !File.Exists(candidate))
+            {
+                continue;
+            }
+
+            TryDeletePath(candidate, warnings, deletedFilePaths, $"intermediate output for task {recordTaskId}");
+        }
+    }
+
+    private static void TryDeletePath(
+        string path,
+        List<string> warnings,
+        List<string> deletedPaths,
+        string label)
+    {
+        var absolutePath = Path.IsPathRooted(path)
+            ? path
+            : Path.GetFullPath(path, AppContext.BaseDirectory);
+
+        try
+        {
+            if (IsUnsafeDeletionTarget(absolutePath))
+            {
+                warnings.Add($"Skipped deleting suspicious path: {absolutePath}");
+                return;
+            }
+
+            if (File.Exists(absolutePath))
+            {
+                File.Delete(absolutePath);
+                deletedPaths.Add(absolutePath);
+                return;
+            }
+
+            if (Directory.Exists(absolutePath))
+            {
+                Directory.Delete(absolutePath, true);
+                deletedPaths.Add(absolutePath);
+                return;
+            }
+
+            warnings.Add($"Path not found for {label}: {absolutePath}");
+        }
+        catch (Exception ex)
+        {
+            warnings.Add($"Failed to delete {label}: {ex.Message}");
+        }
+    }
+
+    private static bool IsUnsafeDeletionTarget(string absolutePath)
+    {
+        var normalized = absolutePath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+        var root = Path.GetPathRoot(normalized)?.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+        return string.IsNullOrWhiteSpace(normalized) ||
+               normalized.Length < 4 ||
+               string.Equals(normalized, root, StringComparison.OrdinalIgnoreCase);
+    }
+}
diff --git a/src/LiveRecorder.Infrastructure/Services/WebhookNotificationService.cs b/src/LiveRecorder.Infrastructure/Services/WebhookNotificationService.cs
new file mode 100644
index 0000000..48ded2f
--- /dev/null
+++ b/src/LiveRecorder.Infrastructure/Services/WebhookNotificationService.cs
@@ -0,0 +1,337 @@
+using System.Net.Http.Json;
+using System.Text;
+using System.Text.Json;
+using LiveRecorder.Application.Abstractions.Logging;
+using LiveRecorder.Application.Abstractions.Notifications;
+using LiveRecorder.Application.Abstractions.Settings;
+using LiveRecorder.Application.Models.Settings;
+using LiveRecorder.Domain.Entities;
+using Microsoft.Extensions.Logging;
+
+namespace LiveRecorder.Infrastructure.Services;
+
+public sealed class WebhookNotificationService : IWebhookNotificationService
+{
+    private const string AppName = "LiveRecorder";
+
+    private readonly IHttpClientFactory _httpClientFactory;
+    private readonly ISystemSettingsService _systemSettingsService;
+    private readonly ISystemLogService _systemLogService;
+    private readonly ILogger<WebhookNotificationService> _logger;
+
+    public WebhookNotificationService(
+        IHttpClientFactory httpClientFactory,
+        ISystemSettingsService systemSettingsService,
+        ISystemLogService systemLogService,
+        ILogger<WebhookNotificationService> logger)
+    {
+        _httpClientFactory = httpClientFactory;
+        _systemSettingsService = systemSettingsService;
+        _systemLogService = systemLogService;
+        _logger = logger;
+    }
+
+    public async Task SendLiveStartedAsync(LiveRoom liveRoom, CancellationToken cancellationToken = default)
+    {
+        var settings = await _systemSettingsService.GetAsync(cancellationToken);
+        if (!settings.EnableWebhookNotification || !settings.NotifyWebhookOnLiveStarted)
+        {
+            return;
+        }
+
+        var payload = BuildPayload(
+            "live_started",
+            $"Live started: {liveRoom.AnchorName ?? liveRoom.RoomId}",
+            liveRoom.SourceUrl,
+            liveRoom,
+            recordTask: null);
+
+        await SendConfiguredWebhookAsync(
+            settings,
+            payload,
+            "Webhook notification sent for live_started.",
+            "Webhook notification failed for live_started.",
+            liveRoom.Id,
+            recordSessionId: null,
+            recordTaskId: null,
+            cancellationToken);
+    }
+
+    public async Task SendExceptionAsync(
+        string source,
+        string summary,
+        string? detail = null,
+        LiveRoom? liveRoom = null,
+        RecordTask? recordTask = null,
+        CancellationToken cancellationToken = default)
+    {
+        var settings = await _systemSettingsService.GetAsync(cancellationToken);
+        if (!settings.EnableWebhookNotification || !settings.NotifyWebhookOnException)
+        {
+            return;
+        }
+
+        var payload = BuildPayload(
+            "exception",
+            summary,
+            detail,
+            liveRoom,
+            recordTask,
+            source);
+
+        await SendConfiguredWebhookAsync(
+            settings,
+            payload,
+            "Webhook notification sent for exception.",
+            "Webhook notification failed for exception.",
+            liveRoom?.Id,
+            recordSessionId: recordTask?.RecordSessionId,
+            recordTaskId: recordTask?.Id,
+            cancellationToken);
+    }
+
+    public async Task<WebhookTestResultDto> SendTestAsync(
+        SendTestWebhookRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        var settings = new SystemSettingsDto
+        {
+            EnableWebhookNotification = true,
+            WebhookUrl = request.WebhookUrl.Trim(),
+            WebhookHeaders = request.WebhookHeaders,
+            WebhookTimeoutSeconds = request.WebhookTimeoutSeconds,
+            NotifyWebhookOnLiveStarted = true,
+            NotifyWebhookOnException = true
+        };
+
+        var payload = BuildPayload(
+            "live_started",
+            "Webhook test from LiveRecorder.",
+            "This is a sample webhook payload generated from the settings test action.",
+            new LiveRoom(
+                Domain.Enums.LivePlatformType.Douyin,
+                "https://live.douyin.com/676493068539",
+                "676493068539",
+                "https://live.douyin.com/676493068539",
+                DateTimeOffset.UtcNow),
+            recordTask: null);
+
+        try
+        {
+            var result = await SendInternalAsync(settings, payload, cancellationToken);
+            await _systemLogService.WriteAsync(
+                result.Success ? Domain.Enums.SystemLogLevel.Info : Domain.Enums.SystemLogLevel.Warning,
+                "Webhook",
+                result.Success
+                    ? "Webhook test completed successfully."
+                    : "Webhook test failed.",
+                result.Detail,
+                cancellationToken: cancellationToken);
+
+            return new WebhookTestResultDto
+            {
+                Success = result.Success,
+                Message = result.Success
+                    ? "Webhook test completed successfully."
+                    : "Webhook test failed.",
+                Detail = result.Detail
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Webhook test failed");
+            await _systemLogService.WriteAsync(
+                Domain.Enums.SystemLogLevel.Warning,
+                "Webhook",
+                "Webhook test failed.",
+                ex.ToString(),
+                cancellationToken: cancellationToken);
+
+            return new WebhookTestResultDto
+            {
+                Success = false,
+                Message = "Webhook test failed.",
+                Detail = ex.Message
+            };
+        }
+    }
+
+    private async Task SendConfiguredWebhookAsync(
+        SystemSettingsDto settings,
+        object payload,
+        string successMessage,
+        string failureMessage,
+        Guid? liveRoomId,
+        Guid? recordSessionId,
+        Guid? recordTaskId,
+        CancellationToken cancellationToken)
+    {
+        try
+        {
+            var result = await SendInternalAsync(settings, payload, cancellationToken);
+            if (!result.Success)
+            {
+                await _systemLogService.WriteAsync(
+                    Domain.Enums.SystemLogLevel.Warning,
+                    "Webhook",
+                    failureMessage,
+                    result.Detail,
+                    liveRoomId,
+                    recordSessionId,
+                    recordTaskId,
+                    cancellationToken);
+                return;
+            }
+
+            await _systemLogService.WriteAsync(
+                Domain.Enums.SystemLogLevel.Info,
+                "Webhook",
+                successMessage,
+                result.Detail,
+                liveRoomId,
+                recordSessionId,
+                recordTaskId,
+                cancellationToken);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "{FailureMessage}", failureMessage);
+            await _systemLogService.WriteAsync(
+                Domain.Enums.SystemLogLevel.Warning,
+                "Webhook",
+                failureMessage,
+                ex.ToString(),
+                liveRoomId,
+                recordSessionId,
+                recordTaskId,
+                cancellationToken);
+        }
+    }
+
+    private async Task<WebhookSendResult> SendInternalAsync(
+        SystemSettingsDto settings,
+        object payload,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(settings.WebhookUrl))
+        {
+            throw new InvalidOperationException("Webhook URL is required.");
+        }
+
+        var client = _httpClientFactory.CreateClient();
+        client.Timeout = TimeSpan.FromSeconds(Math.Clamp(settings.WebhookTimeoutSeconds, 1, 300));
+
+        using var request = new HttpRequestMessage(HttpMethod.Post, settings.WebhookUrl.Trim())
+        {
+            Content = JsonContent.Create(payload)
+        };
+
+        foreach (var header in ParseHeaders(settings.WebhookHeaders))
+        {
+            if (!request.Headers.TryAddWithoutValidation(header.Key, header.Value))
+            {
+                request.Content?.Headers.TryAddWithoutValidation(header.Key, header.Value);
+            }
+        }
+
+        using var response = await client.SendAsync(request, cancellationToken);
+        var responseBody = await response.Content.ReadAsStringAsync(cancellationToken);
+        var detail = BuildResponseDetail(settings.WebhookUrl, response, responseBody);
+        return new WebhookSendResult(response.IsSuccessStatusCode, detail);
+    }
+
+    private static object BuildPayload(
+        string eventType,
+        string summary,
+        string? detail,
+        LiveRoom? liveRoom,
+        RecordTask? recordTask,
+        string? source = null)
+    {
+        return new
+        {
+            appName = AppName,
+            eventType,
+            sentAtUtc = DateTimeOffset.UtcNow,
+            summary,
+            detail,
+            source,
+            liveRoom = liveRoom is null
+                ? null
+                : new
+                {
+                    id = liveRoom.Id,
+                    platform = liveRoom.Platform.ToString(),
+                    roomId = liveRoom.RoomId,
+                    title = liveRoom.Title,
+                    anchorName = liveRoom.AnchorName,
+                    sourceUrl = liveRoom.SourceUrl
+                },
+            recordTask = recordTask is null
+                ? null
+                : new
+                {
+                    id = recordTask.Id,
+                    recordSessionId = recordTask.RecordSessionId,
+                    status = recordTask.Status.ToString(),
+                    segmentIndex = recordTask.SegmentIndex,
+                    outputFilePath = recordTask.OutputFilePath
+                }
+        };
+    }
+
+    private static IReadOnlyList<KeyValuePair<string, string>> ParseHeaders(string rawHeaders)
+    {
+        if (string.IsNullOrWhiteSpace(rawHeaders))
+        {
+            return [];
+        }
+
+        var results = new List<KeyValuePair<string, string>>();
+        var lines = rawHeaders
+            .Replace("\r\n", "\n", StringComparison.Ordinal)
+            .Replace('\r', '\n')
+            .Split('\n', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+
+        foreach (var line in lines)
+        {
+            var separatorIndex = line.IndexOf(':');
+            if (separatorIndex <= 0)
+            {
+                throw new InvalidOperationException($"Invalid webhook header format: {line}");
+            }
+
+            var name = line[..separatorIndex].Trim();
+            var value = line[(separatorIndex + 1)..].Trim();
+            if (string.IsNullOrWhiteSpace(name))
+            {
+                throw new InvalidOperationException($"Invalid webhook header format: {line}");
+            }
+
+            results.Add(new KeyValuePair<string, string>(name, value));
+        }
+
+        return results;
+    }
+
+    private static string BuildResponseDetail(string webhookUrl, HttpResponseMessage response, string responseBody)
+    {
+        var builder = new StringBuilder();
+        builder.Append("url=").Append(webhookUrl.Trim());
+        builder.Append("; status=").Append((int)response.StatusCode);
+        builder.Append(' ').Append(response.ReasonPhrase);
+
+        var normalizedBody = responseBody.Trim();
+        if (!string.IsNullOrWhiteSpace(normalizedBody))
+        {
+            var truncatedBody = normalizedBody.Length <= 1000 ? normalizedBody : normalizedBody[..1000];
+            builder.Append("; body=").Append(truncatedBody);
+        }
+
+        return builder.ToString();
+    }
+
+    private sealed record WebhookSendResult(bool Success, string Detail);
+}
diff --git a/src/LiveRecorder.WebApi/Controllers/RecoveryController.cs b/src/LiveRecorder.WebApi/Controllers/RecoveryController.cs
new file mode 100644
index 0000000..65b48be
--- /dev/null
+++ b/src/LiveRecorder.WebApi/Controllers/RecoveryController.cs
@@ -0,0 +1,37 @@
+using LiveRecorder.Application.Models.Recovery;
+using LiveRecorder.Infrastructure.Services;
+using Microsoft.AspNetCore.Mvc;
+
+namespace LiveRecorder.WebApi.Controllers;
+
+[ApiController]
+[Route("api/recovery")]
+public sealed class RecoveryController : ControllerBase
+{
+    private readonly RecoveryService _recoveryService;
+
+    public RecoveryController(RecoveryService recoveryService)
+    {
+        _recoveryService = recoveryService;
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<RecoveryOverviewDto>> Get(CancellationToken cancellationToken) =>
+        Ok(await _recoveryService.GetOverviewAsync(cancellationToken));
+
+    [HttpPost("live-rooms/{id:guid}/retry")]
+    public async Task<ActionResult<RecoveryActionResultDto>> RetryLiveRoom(Guid id, CancellationToken cancellationToken) =>
+        Ok(await _recoveryService.RetryLiveRoomAsync(id, cancellationToken));
+
+    [HttpPost("live-rooms/retry-all")]
+    public async Task<ActionResult<RecoveryActionResultDto>> RetryAllLiveRooms(CancellationToken cancellationToken) =>
+        Ok(await _recoveryService.RetryAllLiveRoomsAsync(cancellationToken));
+
+    [HttpPost("finalizations/{taskId:guid}/resume")]
+    public async Task<ActionResult<RecoveryActionResultDto>> ResumeFinalization(Guid taskId, CancellationToken cancellationToken) =>
+        Ok(await _recoveryService.ResumeFinalizationAsync(taskId, cancellationToken));
+
+    [HttpPost("finalizations/resume-all")]
+    public async Task<ActionResult<RecoveryActionResultDto>> ResumeAllFinalizations(CancellationToken cancellationToken) =>
+        Ok(await _recoveryService.ResumeAllFinalizationsAsync(cancellationToken));
+}
diff --git a/src/LiveRecorder.WebApi/Controllers/ReportsController.cs b/src/LiveRecorder.WebApi/Controllers/ReportsController.cs
new file mode 100644
index 0000000..aa52258
--- /dev/null
+++ b/src/LiveRecorder.WebApi/Controllers/ReportsController.cs
@@ -0,0 +1,33 @@
+using System.Globalization;
+using LiveRecorder.Application.Models.Reports;
+using LiveRecorder.Application.Services;
+using Microsoft.AspNetCore.Mvc;
+
+namespace LiveRecorder.WebApi.Controllers;
+
+[ApiController]
+[Route("api/reports")]
+public sealed class ReportsController : ControllerBase
+{
+    private readonly SessionAnalyticsService _sessionAnalyticsService;
+
+    public ReportsController(SessionAnalyticsService sessionAnalyticsService)
+    {
+        _sessionAnalyticsService = sessionAnalyticsService;
+    }
+
+    [HttpGet("daily")]
+    public async Task<ActionResult<DailyReviewReportDto>> GetDaily(
+        [FromQuery] string? date,
+        [FromQuery] int utcOffsetMinutes = 0,
+        CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(date) ||
+            !DateOnly.TryParseExact(date, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var localDate))
+        {
+            return BadRequest("The date query parameter must use YYYY-MM-DD format.");
+        }
+
+        return Ok(await _sessionAnalyticsService.GetDailyReviewAsync(localDate, utcOffsetMinutes, cancellationToken));
+    }
+}
diff --git a/src/LiveRecorder.WebApi/Controllers/SettingsController.cs b/src/LiveRecorder.WebApi/Controllers/SettingsController.cs
index 01c5578..71f80f4 100644
--- a/src/LiveRecorder.WebApi/Controllers/SettingsController.cs
+++ b/src/LiveRecorder.WebApi/Controllers/SettingsController.cs
@@ -1,6 +1,8 @@
 using LiveRecorder.Application.Abstractions.Settings;
 using LiveRecorder.Application.Abstractions.Notifications;
+using LiveRecorder.Application.Abstractions.Scripting;
 using LiveRecorder.Application.Models.Settings;
+using LiveRecorder.Infrastructure.Services;
 using Microsoft.AspNetCore.Mvc;
 
 namespace LiveRecorder.WebApi.Controllers;
@@ -11,13 +13,22 @@ public sealed class SettingsController : ControllerBase
 {
     private readonly ISystemSettingsService _systemSettingsService;
     private readonly IEmailNotificationService _emailNotificationService;
+    private readonly IEventScriptService _eventScriptService;
+    private readonly IWebhookNotificationService _webhookNotificationService;
+    private readonly RetentionCleanupService _retentionCleanupService;
 
     public SettingsController(
         ISystemSettingsService systemSettingsService,
-        IEmailNotificationService emailNotificationService)
+        IEmailNotificationService emailNotificationService,
+        IEventScriptService eventScriptService,
+        IWebhookNotificationService webhookNotificationService,
+        RetentionCleanupService retentionCleanupService)
     {
         _systemSettingsService = systemSettingsService;
         _emailNotificationService = emailNotificationService;
+        _eventScriptService = eventScriptService;
+        _webhookNotificationService = webhookNotificationService;
+        _retentionCleanupService = retentionCleanupService;
     }
 
     [HttpGet]
@@ -38,4 +49,20 @@ public sealed class SettingsController : ControllerBase
         await _emailNotificationService.SendTestAsync(request, cancellationToken);
         return NoContent();
     }
+
+    [HttpPost("test-event-script")]
+    public async Task<ActionResult<EventScriptTestResultDto>> TestEventScript(
+        [FromBody] TestEventScriptRequest request,
+        CancellationToken cancellationToken) =>
+        Ok(await _eventScriptService.TestAsync(request, cancellationToken));
+
+    [HttpPost("test-webhook")]
+    public async Task<ActionResult<WebhookTestResultDto>> TestWebhook(
+        [FromBody] SendTestWebhookRequest request,
+        CancellationToken cancellationToken) =>
+        Ok(await _webhookNotificationService.SendTestAsync(request, cancellationToken));
+
+    [HttpPost("retention/run-now")]
+    public async Task<ActionResult<RetentionCleanupResultDto>> RunRetentionCleanupNow(CancellationToken cancellationToken) =>
+        Ok(await _retentionCleanupService.RunAsync(ignoreEnabledSetting: true, cancellationToken));
 }
diff --git a/src/LiveRecorder.WebApi/Program.cs b/src/LiveRecorder.WebApi/Program.cs
index 78258a5..a70a584 100644
--- a/src/LiveRecorder.WebApi/Program.cs
+++ b/src/LiveRecorder.WebApi/Program.cs
@@ -135,6 +135,7 @@ builder.Services.AddScoped<IUserSessionRepository, UserSessionRepository>();
 builder.Services.AddScoped<ISystemSettingsService, SystemSettingsService>();
 builder.Services.AddScoped<ISystemLogService, SystemLogService>();
 builder.Services.AddScoped<IEmailNotificationService, EmailNotificationService>();
+builder.Services.AddScoped<IWebhookNotificationService, WebhookNotificationService>();
 builder.Services.AddScoped<IEventScriptService, EventScriptService>();
 builder.Services.AddScoped<IAuthService, AuthService>();
 builder.Services.AddScoped<LiveRoomService>();
@@ -142,6 +143,9 @@ builder.Services.AddScoped<LiveRoomStatusService>();
 builder.Services.AddScoped<LiveRoomRecordingSettingsResolver>();
 builder.Services.AddScoped<RecordService>();
 builder.Services.AddScoped<RecordSessionService>();
+builder.Services.AddScoped<SessionAnalyticsService>();
+builder.Services.AddScoped<RecoveryService>();
+builder.Services.AddScoped<RetentionCleanupService>();
 builder.Services.AddScoped<StoppedOrphanRecordSessionCleanupService>();
 builder.Services.AddScoped<DatabaseInitializer>();
 
@@ -162,6 +166,7 @@ builder.Services.AddSingleton<IFfmpegService, FfmpegService>();
 builder.Services.AddSingleton<IStorageGuardService, StorageGuardService>();
 builder.Services.AddScoped<IRecordMediaService, RecordMediaService>();
 builder.Services.AddHostedService<LiveRoomPollingBackgroundService>();
+builder.Services.AddHostedService<RetentionCleanupBackgroundService>();
 
 var app = builder.Build();