diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..db7e1d2
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.cmd text eol=crlf
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 98aed7f..5755e81 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -48,14 +48,30 @@ jobs:
     runs-on: windows-2025
     needs: build-test
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 10.0.x
-      - run: dotnet publish BiStudent/BiStudent.csproj -c Release -r win-x64 --self-contained true -o out/BiStudent-Client
-      - run: dotnet publish BiStudent.Server/BiStudent.Server.csproj -c Release -r win-x64 --self-contained true -o out/BiStudent-Server
+      - run: dotnet publish BiStudent/BiStudent.csproj -c Release -r win-x64 --self-contained true -o out/Client
+      - run: dotnet publish BiStudent.Server/BiStudent.Server.csproj -c Release -r win-x64 --self-contained true -o out/Server
+      - name: Build installer
+        shell: pwsh
+        run: |
+          choco install innosetup -y --no-progress
+          Copy-Item installer/BiStudent.cmd out/
+          & "${env:ProgramFiles(x86)}\Inno Setup 6\ISCC.exe" /Q "/DSrc=$PWD\out" "/DOutDir=$PWD\dist" "/DAppVersion=1.0.${{ github.run_number }}" installer/BiStudent.iss
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
       - uses: actions/upload-artifact@v5
         with:
-          name: BiStudent-win-x64
-          path: out/
+          name: BiStudent-Setup
+          path: dist/BiStudent-Setup.exe
+      - name: Publish release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: >
+          gh release create "v1.0.${{ github.run_number }}" dist/BiStudent-Setup.exe
+          --target "${{ github.sha }}" --title "BiStudent 1.0.${{ github.run_number }}"
+          --notes "Установщик для Windows 10/11 x64: скачайте BiStudent-Setup.exe и запустите. Вход в демо-режиме: teacher / teacher123."
diff --git a/.gitignore b/.gitignore
index a740d8a..630cdb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ BiStudent.Server/App_Data*/
 BiStudent.Core/Models/face_recognition_sface_2021dec.onnx
 BiStudent.Core/Models/*.download
 TestResults/
+/out/
diff --git a/BiStudent.Core/FaceEngine.cs b/BiStudent.Core/FaceEngine.cs
index 9c6a99b..f855ee1 100644
--- a/BiStudent.Core/FaceEngine.cs
+++ b/BiStudent.Core/FaceEngine.cs
@@ -20,6 +20,7 @@ private static readonly (double X, double Y)[] AlignedLandmarks =
     private readonly Net recognitionNet;
     private FaceDetectorYN? detector;
     private OpenCvSharp.Size detectorSize;
+    private readonly Dictionary<OpenCvSharp.Size, FaceDetectorYN> scaledDetectors = new();
     private readonly List<(int StudentId, float[] Vector)> enrolled = new();
 
     // OpenCV Zoo uses 0.363 for cosine matching. A slightly higher threshold
@@ -188,8 +189,49 @@ private Mat FindFaces(Mat frame)
             detectorSize = size;
         }
         var faces = new Mat();
-        detector.Detect(frame, faces);
-        return faces;
+        try
+        {
+            detector.Detect(frame, faces);
+            if (faces.Rows > 0 || Math.Max(frame.Width, frame.Height) <= 480) return faces;
+            var longest = Math.Max(frame.Width, frame.Height);
+            foreach (var longSide in new[] { 640, 480, 320 })
+            {
+                if (longSide >= longest) continue;
+                var scale = (double)longSide / longest;
+                var reducedSize = new OpenCvSharp.Size(
+                    Math.Max(1, (int)Math.Round(frame.Width * scale)),
+                    Math.Max(1, (int)Math.Round(frame.Height * scale)));
+                if (!scaledDetectors.TryGetValue(reducedSize, out var scaledDetector))
+                {
+                    if (scaledDetectors.Count == 8)
+                    {
+                        foreach (var cached in scaledDetectors.Values)
+                            cached.Dispose();
+                        scaledDetectors.Clear();
+                    }
+                    scaledDetector = FaceDetectorYN.Create(detectionModel, "", reducedSize, 0.85f);
+                    scaledDetectors.Add(reducedSize, scaledDetector);
+                }
+                using var reduced = new Mat();
+                Cv2.Resize(frame, reduced, reducedSize, 0, 0, InterpolationFlags.Area);
+                using var found = new Mat();
+                scaledDetector.Detect(reduced, found);
+                var foundRows = found.Rows;
+                if (foundRows == 0) continue;
+                for (var row = 0; row < foundRows; row++)
+                    for (var col = 0; col < 14; col++)
+                        found.Set(row, col, found.At<float>(row, col) *
+                            (col % 2 == 0 ? (float)frame.Width / reduced.Width : (float)frame.Height / reduced.Height));
+                faces.Dispose();
+                return found.Clone();
+            }
+            return faces;
+        }
+        catch
+        {
+            faces.Dispose();
+            throw;
+        }
     }
 
     private static OpenCvSharp.Rect Bounds(Mat faces, int row, int width, int height)
@@ -256,6 +298,8 @@ private static double Dot(float[] a, float[] b)
     public void Dispose()
     {
         detector?.Dispose();
+        foreach (var cached in scaledDetectors.Values)
+            cached.Dispose();
         recognitionNet.Dispose();
     }
 }
diff --git a/BiStudent.Tests/AuditFixesTests.cs b/BiStudent.Tests/AuditFixesTests.cs
index ff96dbb..7ba1837 100644
--- a/BiStudent.Tests/AuditFixesTests.cs
+++ b/BiStudent.Tests/AuditFixesTests.cs
@@ -139,7 +139,7 @@ public async Task OneOffSlotBecomesRegular()
         var group = await PostAsync<GroupDto>("/api/groups", new CreateGroupRequest("Регулярная группа"));
         var date = DateOnly.FromDateTime(DateTime.Today).AddDays(-7);
         var request = new SaveSlotRequest(group.Id, null, "Физика", null, date.DayOfWeek,
-            new TimeOnly(8, 0), new TimeOnly(9, 20), WeekParity.Every, date);
+            new TimeOnly(19, 0), new TimeOnly(20, 20), WeekParity.Every, date);
         var slot = await PostAsync<SlotDto>("/api/schedule/slots", request);
 
         Assert.Equal(HttpStatusCode.OK, (await client.PutAsJsonAsync($"/api/schedule/slots/{slot.Id}",
@@ -156,7 +156,7 @@ public async Task JournalWithAncientStartReturnsQuickly()
         var group = await PostAsync<GroupDto>("/api/groups", new CreateGroupRequest("Большой период"));
         var today = DateOnly.FromDateTime(DateTime.Today);
         await PostAsync<SlotDto>("/api/schedule/slots", new SaveSlotRequest(group.Id, null, "История", null,
-            today.DayOfWeek, new TimeOnly(8, 0), new TimeOnly(9, 20), WeekParity.Every, null));
+            today.DayOfWeek, new TimeOnly(19, 0), new TimeOnly(20, 20), WeekParity.Every, null));
 
         var timer = Stopwatch.StartNew();
         using var response = await client.GetAsync($"/api/journal/{group.Id}?from=0001-01-01&to={today:yyyy-MM-dd}");
diff --git a/BiStudent.Tests/FaceEngineLargeFaceTests.cs b/BiStudent.Tests/FaceEngineLargeFaceTests.cs
new file mode 100644
index 0000000..49325de
--- /dev/null
+++ b/BiStudent.Tests/FaceEngineLargeFaceTests.cs
@@ -0,0 +1,31 @@
+using BiStudent;
+using OpenCvSharp;
+using Xunit;
+
+namespace BiStudent.Tests;
+
+public sealed class FaceEngineLargeFaceTests
+{
+    [Theory]
+    [InlineData("armstrong")]
+    [InlineData("aldrin")]
+    [InlineData("ride")]
+    public void CaptureChecked_FindsFaceFillingFrame(string name)
+    {
+        using var engine = new FaceEngine();
+        using var frame = FaceFixtures.Load(name);
+        var face = Assert.Single(engine.Detect(frame));
+        var margin = (int)Math.Round(face.Width * 0.05);
+        var left = Math.Max(0, face.X - margin);
+        var top = Math.Max(0, face.Y - margin);
+        var right = Math.Min(frame.Width, face.Right + margin);
+        var bottom = Math.Min(frame.Height, face.Bottom + margin);
+        using var cropped = new Mat(frame, new Rect(left, top, right - left, bottom - top));
+        var scale = 1280d / Math.Max(cropped.Width, cropped.Height);
+        using var big = new Mat();
+        Cv2.Resize(cropped, big, new Size((int)Math.Round(cropped.Width * scale),
+            (int)Math.Round(cropped.Height * scale)), 0, 0, InterpolationFlags.Cubic);
+        Assert.NotEqual("В кадре нет лица", engine.AssessFrame(big).Problem);
+        engine.CaptureChecked(big);
+    }
+}
diff --git a/README.md b/README.md
index 5b3cd46..fc918b8 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,15 @@
 
 **Учётные записи и копии.** Администратор заводит преподавателей и выдаёт временные пароли. Сервер раз в сутки делает резервную копию, вручную её можно скачать и восстановить в разделе «Администрирование».
 
-## Запуск
+## Скачать
+
+**[BiStudent-Setup.exe](https://github.com/Felorez/BiStudent/releases/latest/download/BiStudent-Setup.exe)** для Windows 10/11 x64. Установка без прав администратора, .NET ставить не нужно. После установки на рабочем столе появляется ярлык BiStudent: он запускает сервер и открывает клиент. На новой базе создаются демо-данные, вход **teacher / teacher123**.
+
+Установщик не подписан. Если Windows покажет «Windows защитила ваш компьютер», нажмите «Подробнее» → «Выполнить в любом случае». Брандмауэр спросит про BiStudent.Server: разрешите доступ, иначе студенты не откроют сайт регистрации с телефона.
+
+Новая версия собирается автоматически после каждого слияния в `main`, все версии лежат в [Releases](https://github.com/Felorez/BiStudent/releases).
+
+## Запуск из исходников
 
 Нужны Windows x64 и .NET 10 SDK.
 
@@ -53,6 +61,7 @@ cd BiStudent
 | `docker compose up -d --build` | сервер в Docker на `http://localhost:5080`, база в томе `bistudent-data` |
 | `dotnet test --solution BiStudent.slnx` | тесты сервера (`BiStudent.Tests`) и клиента (`BiStudent.Client.Tests`) |
 | `node --test tests/site/register.test.cjs` | тесты сайта регистрации лица |
+| `ISCC installer\BiStudent.iss` | собрать установщик в `dist/` из `out/Client` и `out/Server` (порядок сборки в начале файла) |
 | `BiStudent.exe --self-test` | без сервера проверяет модели, камеры и окно входа, результат в `diagnostics/result.txt` |
 | `BiStudent.exe --screenshots <адрес> <логин> <пароль>` | входит на сервер и сохраняет скриншоты всех разделов в `diagnostics/` |
 
diff --git a/installer/BiStudent.cmd b/installer/BiStudent.cmd
new file mode 100644
index 0000000..57ee192
--- /dev/null
+++ b/installer/BiStudent.cmd
@@ -0,0 +1,24 @@
+@echo off
+chcp 65001 >nul
+title BiStudent
+cd /d "%~dp0"
+
+tasklist /fi "imagename eq BiStudent.Server.exe" | find /i "BiStudent.Server.exe" >nul
+if errorlevel 1 (
+    rem На пустой базе создаются демо-данные: вход teacher / teacher123.
+    set Demo__Enabled=true
+    start "BiStudent — сервер (не закрывайте это окно)" /min /d "%~dp0Server" "%~dp0Server\BiStudent.Server.exe" --urls http://0.0.0.0:5080
+)
+
+echo Запускаю BiStudent, подождите...
+for /l %%i in (1,1,60) do (
+    curl.exe -s -f -m 2 http://localhost:5080/health >nul 2>&1 && goto ready
+    timeout /t 1 /nobreak >nul
+)
+echo.
+echo Сервер не ответил за минуту. Откройте свёрнутое окно «BiStudent — сервер» и пришлите текст ошибки.
+pause
+exit /b 1
+
+:ready
+start "" /d "%~dp0Client" "%~dp0Client\BiStudent.exe"
diff --git a/installer/BiStudent.iss b/installer/BiStudent.iss
new file mode 100644
index 0000000..460371a
--- /dev/null
+++ b/installer/BiStudent.iss
@@ -0,0 +1,52 @@
+; Сборка: dotnet publish клиента в out\Client и сервера в out\Server, installer\BiStudent.cmd в out\,
+; затем ISCC /DSrc=<путь к out> /DOutDir=<куда положить exe> /DAppVersion=<версия> installer\BiStudent.iss
+#ifndef Src
+  #define Src AddBackslash(SourcePath) + "..\out"
+#endif
+#ifndef OutDir
+  #define OutDir AddBackslash(SourcePath) + "..\dist"
+#endif
+#ifndef AppVersion
+  #define AppVersion "1.0"
+#endif
+
+[Setup]
+AppId={{6B1F2C3A-8E44-4F0B-9D1E-B15DE7E1A001}
+AppName=BiStudent
+AppVersion={#AppVersion}
+AppPublisher=BiStudent
+DefaultDirName={localappdata}\Programs\BiStudent
+DefaultGroupName=BiStudent
+DisableProgramGroupPage=yes
+PrivilegesRequired=lowest
+OutputDir={#OutDir}
+OutputBaseFilename=BiStudent-Setup
+Compression=lzma2/max
+SolidCompression=yes
+LZMANumBlockThreads=4
+ArchitecturesAllowed=x64compatible
+ArchitecturesInstallIn64BitMode=x64compatible
+UninstallDisplayIcon={app}\Client\BiStudent.exe
+WizardStyle=modern
+CloseApplications=force
+
+[Languages]
+Name: "ru"; MessagesFile: "compiler:Languages\Russian.isl"
+
+[Tasks]
+Name: "desktopicon"; Description: "Ярлык на рабочем столе"; GroupDescription: "Дополнительно:"
+
+[Files]
+Source: "{#Src}\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs
+
+[Icons]
+Name: "{group}\BiStudent"; Filename: "{app}\BiStudent.cmd"; WorkingDir: "{app}"; IconFilename: "{app}\Client\BiStudent.exe"; Flags: runminimized
+Name: "{group}\Удалить BiStudent"; Filename: "{uninstallexe}"
+Name: "{autodesktop}\BiStudent"; Filename: "{app}\BiStudent.cmd"; WorkingDir: "{app}"; IconFilename: "{app}\Client\BiStudent.exe"; Flags: runminimized; Tasks: desktopicon
+
+[Run]
+Filename: "{app}\BiStudent.cmd"; WorkingDir: "{app}"; Description: "Запустить BiStudent"; Flags: postinstall nowait skipifsilent runminimized shellexec
+
+[UninstallRun]
+Filename: "{sys}\taskkill.exe"; Parameters: "/f /im BiStudent.Server.exe"; Flags: runhidden; RunOnceId: "StopServer"
+Filename: "{sys}\taskkill.exe"; Parameters: "/f /im BiStudent.exe"; Flags: runhidden; RunOnceId: "StopClient"