diff --git a/apps/KronaStaffTerminal.Tests/AttendanceTrackerTests.cs b/apps/KronaStaffTerminal.Tests/AttendanceTrackerTests.cs
index 1deb238..f0fd517 100644
--- a/apps/KronaStaffTerminal.Tests/AttendanceTrackerTests.cs
+++ b/apps/KronaStaffTerminal.Tests/AttendanceTrackerTests.cs
@@ -220,4 +220,168 @@ public class AttendanceTrackerTests
 
         Assert.Empty(checkedOutRecords);
     }
+
+    [Fact]
+    public async Task ProcessScan_Locked_RegularEmployee_FirstScan_RecordsAttendanceAndKeepsLocked()
+    {
+        var (state, emp) = CreateTestState();
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.True(result.Success);
+        Assert.False(result.ShouldUnlock);
+        Assert.NotNull(result.AttendanceResult.Record);
+        Assert.Equal("Приход", result.AttendanceResult.Record.EventType);
+        Assert.Equal("Отметка прихода или ухода зафиксирована. Интерфейс остаётся заблокированным.", result.LockScreenMessage);
+        Assert.Single(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Locked_Administrator_FirstScan_RecordsAttendanceAndUnlocks()
+    {
+        var (state, emp) = CreateTestState();
+        emp.IsAdministrator = true;
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.True(result.Success);
+        Assert.True(result.ShouldUnlock);
+        Assert.NotNull(result.AttendanceResult.Record);
+        Assert.Equal("Приход", result.AttendanceResult.Record.EventType);
+        Assert.Null(result.LockScreenMessage);
+        Assert.Contains(emp.DisplayName, result.StatusMessage);
+        Assert.Single(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Locked_Administrator_SecondScanAfterGuard_RecordsCheckOutAndUnlocks()
+    {
+        var (state, emp) = CreateTestState();
+        emp.IsAdministrator = true;
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        // First scan: check-in
+        await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        // Second scan after 35 seconds (guard is 30s)
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now.AddSeconds(35), isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.True(result.Success);
+        Assert.True(result.ShouldUnlock);
+        Assert.NotNull(result.AttendanceResult.Record);
+        Assert.Equal("Уход", result.AttendanceResult.Record.EventType);
+        Assert.Null(result.LockScreenMessage);
+        Assert.Equal(2, state.Attendance.Count);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Locked_RegularEmployee_DuplicateScan_RejectsDuplicateAndKeepsLocked()
+    {
+        var (state, emp) = CreateTestState();
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        // First scan
+        await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        // Immediate repeat scan 5s later
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now.AddSeconds(5), isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.False(result.Success);
+        Assert.False(result.ShouldUnlock);
+        Assert.True(result.AttendanceResult.IsDuplicateSuppressed);
+        Assert.Equal(25, result.AttendanceResult.RemainingSeconds);
+        Assert.Equal("Повторный скан отклонён. Повторите через 25 сек.", result.LockScreenMessage);
+        Assert.Single(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Locked_Administrator_DuplicateScan_RejectsDuplicateAndUnlocks()
+    {
+        var (state, emp) = CreateTestState();
+        emp.IsAdministrator = true;
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        // First scan
+        await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        // Immediate repeat scan 5s later
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now.AddSeconds(5), isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.False(result.Success);
+        Assert.True(result.ShouldUnlock);
+        Assert.True(result.AttendanceResult.IsDuplicateSuppressed);
+        Assert.Equal(25, result.AttendanceResult.RemainingSeconds);
+        Assert.Null(result.LockScreenMessage);
+        Assert.Single(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Locked_BlockedEmployee_DoesNotRecordAttendance()
+    {
+        var (state, emp) = CreateTestState();
+        emp.IsBlocked = true;
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: true, _ => Task.CompletedTask);
+
+        Assert.False(result.Success);
+        Assert.False(result.ShouldUnlock);
+        Assert.False(result.AttendanceResult.Success);
+        Assert.Equal("Этот сотрудник заблокирован.", result.LockScreenMessage);
+        Assert.Empty(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Unlocked_RegularEmployee_RecordsAttendanceWithoutUnlock()
+    {
+        var (state, emp) = CreateTestState();
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: false, _ => Task.CompletedTask);
+
+        Assert.True(result.Success);
+        Assert.False(result.ShouldUnlock);
+        Assert.NotNull(result.AttendanceResult.Record);
+        Assert.Equal("Приход", result.AttendanceResult.Record.EventType);
+        Assert.Null(result.LockScreenMessage);
+        Assert.Single(state.Attendance);
+    }
+
+    [Fact]
+    public async Task ProcessScan_Unlocked_Administrator_RecordsAttendanceWithoutUnlock()
+    {
+        var (state, emp) = CreateTestState();
+        emp.IsAdministrator = true;
+        var tracker = new AttendanceTracker();
+        var now = DateTimeOffset.UtcNow;
+
+        var result = await tracker.ProcessScanAsync(
+            state, emp, 0, now, isApplicationLocked: false, _ => Task.CompletedTask);
+
+        Assert.True(result.Success);
+        Assert.False(result.ShouldUnlock);
+        Assert.NotNull(result.AttendanceResult.Record);
+        Assert.Equal("Приход", result.AttendanceResult.Record.EventType);
+        Assert.Null(result.LockScreenMessage);
+        Assert.Single(state.Attendance);
+    }
 }
diff --git a/apps/KronaStaffTerminal/App.xaml.cs b/apps/KronaStaffTerminal/App.xaml.cs
index 523bbcc..0f75f9d 100644
--- a/apps/KronaStaffTerminal/App.xaml.cs
+++ b/apps/KronaStaffTerminal/App.xaml.cs
@@ -123,6 +123,9 @@ public partial class App : Application
 
     public void NotifyMinimizedToTray() => _trayService?.ShowRunningBalloon();
 
+    public void ShowNotificationBalloon(string title, string message, uint infoFlags = 1) =>
+        _trayService?.ShowNotificationBalloon(title, message, infoFlags);
+
     public void UpdateTray(TrayState state, int pendingCount, string? statusText = null) =>
         _trayService?.UpdateState(state, pendingCount, statusText);
 
diff --git a/apps/KronaStaffTerminal/KronaStaffTerminal.csproj b/apps/KronaStaffTerminal/KronaStaffTerminal.csproj
index 20eddb7..00cea39 100644
--- a/apps/KronaStaffTerminal/KronaStaffTerminal.csproj
+++ b/apps/KronaStaffTerminal/KronaStaffTerminal.csproj
@@ -73,6 +73,7 @@
     <PackageReference Include="System.Security.Cryptography.ProtectedData" Version="10.0.0" />
     <PackageReference Include="Konscious.Security.Cryptography.Argon2" Version="1.3.1" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools.WinApp" Version="0.6.1" />
+    <PackageReference Include="System.Windows.Extensions" Version="10.0.12" />
   </ItemGroup>
 
   <!--
@@ -97,14 +98,8 @@
       <_WinUiAsset Include="$(TargetDir)Assets\**\*" />
       <_WinUiStyle Include="$(TargetDir)Styles\**\*" />
     </ItemGroup>
-    <Copy SourceFiles="@(_WinUiRootResource)"
-          DestinationFolder="$(PublishDir)"
-          SkipUnchangedFiles="true" />
-    <Copy SourceFiles="@(_WinUiAsset)"
-          DestinationFiles="@(_WinUiAsset->'$(PublishDir)Assets\%(RecursiveDir)%(Filename)%(Extension)')"
-          SkipUnchangedFiles="true" />
-    <Copy SourceFiles="@(_WinUiStyle)"
-          DestinationFiles="@(_WinUiStyle->'$(PublishDir)Styles\%(RecursiveDir)%(Filename)%(Extension)')"
-          SkipUnchangedFiles="true" />
+    <Copy SourceFiles="@(_WinUiRootResource)" DestinationFolder="$(PublishDir)" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="@(_WinUiAsset)" DestinationFiles="@(_WinUiAsset->'$(PublishDir)Assets\%(RecursiveDir)%(Filename)%(Extension)')" SkipUnchangedFiles="true" />
+    <Copy SourceFiles="@(_WinUiStyle)" DestinationFiles="@(_WinUiStyle->'$(PublishDir)Styles\%(RecursiveDir)%(Filename)%(Extension)')" SkipUnchangedFiles="true" />
   </Target>
 </Project>
diff --git a/apps/KronaStaffTerminal/MainPage.xaml.cs b/apps/KronaStaffTerminal/MainPage.xaml.cs
index 1a4d976..ff6febf 100644
--- a/apps/KronaStaffTerminal/MainPage.xaml.cs
+++ b/apps/KronaStaffTerminal/MainPage.xaml.cs
@@ -963,19 +963,7 @@ public sealed partial class MainPage : Page
             else SetStatus("Сотрудник заблокирован. Отметка не создана.", InfoBarSeverity.Warning);
             return;
         }
-        if (_applicationLocked)
-        {
-            if (!employee.IsAdministrator)
-            {
-                await RecordAttendanceAsync(employee, score);
-                LockScreenMessage.Text = "Отметка прихода или ухода зафиксирована. Интерфейс остаётся заблокированным.";
-                return;
-            }
-            _attendanceSuppressedFingerprintId = fingerprintId;
-            _attendanceSuppressedUntilUtc = DateTimeOffset.UtcNow.AddSeconds(3);
-            UnlockApplication($"employee:{employee.Id}", $"Вход выполнен по отпечатку администратора {employee.DisplayName}.");
-            return;
-        }
+
         if (_adminAuthCompletion is not null)
         {
             if (employee.IsAdministrator)
@@ -1004,30 +992,57 @@ public sealed partial class MainPage : Page
         }
         _attendanceSuppressedFingerprintId = null;
         _attendanceSuppressedUntilUtc = default;
+
+        if (_applicationLocked)
+        {
+            var scanResult = await RecordAttendanceAsync(employee, score);
+            if (scanResult.ShouldUnlock)
+            {
+                _attendanceSuppressedFingerprintId = fingerprintId;
+                _attendanceSuppressedUntilUtc = DateTimeOffset.UtcNow.AddSeconds(3);
+                UnlockApplication($"employee:{employee.Id}", scanResult.StatusMessage);
+                return;
+            }
+
+            LockScreenMessage.Text = scanResult.LockScreenMessage;
+            return;
+        }
+
         await RecordAttendanceAsync(employee, score);
     }
 
-    private async Task RecordAttendanceAsync(EmployeeRecord employee, int score)
+    private async Task<ScanRecognitionResult> RecordAttendanceAsync(EmployeeRecord employee, int score)
     {
         var now = DateTimeOffset.UtcNow;
-        var result = await _attendanceTracker.TryRecordAttendanceAsync(
+        var scanResult = await _attendanceTracker.ProcessScanAsync(
             _state,
             employee,
             _scanner.ReaderIndex,
             now,
+            _applicationLocked,
             state => _store.SaveAsync(state));
 
+        var result = scanResult.AttendanceResult;
         if (!result.Success)
         {
             if (result.IsDuplicateSuppressed)
             {
+                PlayDuplicateSoundSafe();
+                ShowTrayNotification(
+                    "Krona Staff",
+                    $"Повторный скан отклонён. Повторите через {result.RemainingSeconds} сек.");
                 TerminalMessage.Text = $"{TerminalDisplayName(employee)}\nПовторный скан отклонён\nПовторите через {result.RemainingSeconds} сек.";
                 SetStatus(result.Message, InfoBarSeverity.Informational);
             }
-            return;
+            return scanResult;
         }
 
         var record = result.Record!;
+        PlaySuccessSoundSafe();
+        ShowTrayNotification(
+            "Krona Staff",
+            $"{TerminalDisplayName(employee)}: {record.EventType} в {now.ToLocalTime():HH:mm}");
+
         RefreshLists();
         TerminalMessage.Text = $"{TerminalDisplayName(employee)}\n{record.EventType} отмечен в {now.ToLocalTime():HH:mm}";
         SetStatus($"{record.EventType} отмечен. Точность распознавания: {score}.", InfoBarSeverity.Success);
@@ -1046,6 +1061,47 @@ public sealed partial class MainPage : Page
         {
             SetStatus($"{record.EventType} сохранён, но уведомление не отправлено: {delivery.Error}", InfoBarSeverity.Warning);
         }
+
+        return scanResult;
+    }
+
+    private static void PlaySuccessSoundSafe()
+    {
+        try
+        {
+            System.Media.SystemSounds.Asterisk.Play();
+        }
+        catch (Exception exception)
+        {
+            CrashLogService.Write(exception);
+        }
+    }
+
+    private static void PlayDuplicateSoundSafe()
+    {
+        try
+        {
+            System.Media.SystemSounds.Exclamation.Play();
+        }
+        catch (Exception exception)
+        {
+            CrashLogService.Write(exception);
+        }
+    }
+
+    private static void ShowTrayNotification(string title, string message)
+    {
+        try
+        {
+            if (Application.Current is App app)
+            {
+                app.ShowNotificationBalloon(title, message);
+            }
+        }
+        catch (Exception exception)
+        {
+            CrashLogService.Write(exception);
+        }
     }
 
     private async Task RunAutomaticCheckoutIfDueAsync()
diff --git a/apps/KronaStaffTerminal/Services/AttendanceTracker.cs b/apps/KronaStaffTerminal/Services/AttendanceTracker.cs
index 1217ad9..160b4ed 100644
--- a/apps/KronaStaffTerminal/Services/AttendanceTracker.cs
+++ b/apps/KronaStaffTerminal/Services/AttendanceTracker.cs
@@ -9,6 +9,13 @@ public sealed record AttendanceRecordResult(
     bool IsDuplicateSuppressed,
     int RemainingSeconds = 0);
 
+public sealed record ScanRecognitionResult(
+    bool Success,
+    AttendanceRecordResult AttendanceResult,
+    bool ShouldUnlock,
+    string? LockScreenMessage,
+    string StatusMessage);
+
 public sealed class AttendanceTracker
 {
     private readonly SemaphoreSlim _gate = new(1, 1);
@@ -77,6 +84,71 @@ public sealed class AttendanceTracker
         }
     }
 
+    public async Task<ScanRecognitionResult> ProcessScanAsync(
+        TerminalState state,
+        EmployeeRecord employee,
+        int readerIndex,
+        DateTimeOffset nowUtc,
+        bool isApplicationLocked,
+        Func<TerminalState, Task> saveStateCallback)
+    {
+        if (employee.IsBlocked)
+        {
+            return new ScanRecognitionResult(
+                Success: false,
+                AttendanceResult: new AttendanceRecordResult(
+                    Success: false,
+                    Record: null,
+                    Message: "Сотрудник заблокирован. Отметка не создана.",
+                    IsDuplicateSuppressed: false),
+                ShouldUnlock: false,
+                LockScreenMessage: isApplicationLocked ? "Этот сотрудник заблокирован." : null,
+                StatusMessage: "Сотрудник заблокирован. Отметка не создана.");
+        }
+
+        var attendanceResult = await TryRecordAttendanceAsync(
+            state,
+            employee,
+            readerIndex,
+            nowUtc,
+            saveStateCallback);
+
+        if (isApplicationLocked)
+        {
+            if (!employee.IsAdministrator)
+            {
+                var lockMessage = attendanceResult.Success
+                    ? "Отметка прихода или ухода зафиксирована. Интерфейс остаётся заблокированным."
+                    : attendanceResult.IsDuplicateSuppressed
+                        ? $"Повторный скан отклонён. Повторите через {attendanceResult.RemainingSeconds} сек."
+                        : "Отметка не создана. Интерфейс остаётся заблокированным.";
+
+                return new ScanRecognitionResult(
+                    Success: attendanceResult.Success,
+                    AttendanceResult: attendanceResult,
+                    ShouldUnlock: false,
+                    LockScreenMessage: lockMessage,
+                    StatusMessage: attendanceResult.Message);
+            }
+
+            // Administrator scan in locked state:
+            // Attendance is recorded AND the interface should be unlocked
+            return new ScanRecognitionResult(
+                Success: attendanceResult.Success,
+                AttendanceResult: attendanceResult,
+                ShouldUnlock: true,
+                LockScreenMessage: null,
+                StatusMessage: $"Вход выполнен по отпечатку администратора {employee.DisplayName}.");
+        }
+
+        return new ScanRecognitionResult(
+            Success: attendanceResult.Success,
+            AttendanceResult: attendanceResult,
+            ShouldUnlock: false,
+            LockScreenMessage: null,
+            StatusMessage: attendanceResult.Message);
+    }
+
     public async Task<List<AttendanceRecord>> RunScheduledCheckoutAsync(
         TerminalState state,
         DateTimeOffset nowUtc,