Этап 2

Minint.Core/Services/IBmpExporter.cs

@@ -0,0 +1,13 @@
+namespace Minint.Core.Services;
+
+public interface IBmpExporter
+{
+    /// <summary>
+    /// Exports a composited ARGB pixel buffer as a 32-bit BMP file.
+    /// </summary>
+    /// <param name="stream">Output stream.</param>
+    /// <param name="pixels">Pixel data packed as 0xAARRGGBB, row-major.</param>
+    /// <param name="width">Image width.</param>
+    /// <param name="height">Image height.</param>
+    void Export(Stream stream, uint[] pixels, int width, int height);
+}