Added the visual briefing assistant (#893)

app/MindWork AI Studio/Tools/Services/RustService.Image.cs

@@ -0,0 +1,29 @@
+using AIStudio.Tools.Rust;
+
+namespace AIStudio.Tools.Services;
+
+public sealed partial class RustService
+{
+    /// <summary>
+    /// Validates and optionally optimizes a local image in the Rust runtime.
+    /// </summary>
+    /// <remarks>
+    /// The runtime rejects files whose content does not match their extension, so the returned MIME
+    /// type always describes the actual bytes.
+    /// </remarks>
+    /// <param name="path">The absolute path of a PNG, JPEG, or WebP image.</param>
+    /// <param name="optimize">Whether the maximum-edge policy and re-encoding are applied.</param>
+    /// <param name="token">The cancellation token.</param>
+    /// <returns>The prepared image, dimensions, and stable MIME type.</returns>
+    public async Task<ImagePrepareResponse> PrepareImageAsync(
+        string path,
+        bool optimize,
+        CancellationToken token = default)
+    {
+        using var response = await this.http.PostAsJsonAsync("/image/prepare", new { path, optimize }, this.jsonRustSerializerOptions, token);
+        response.EnsureSuccessStatusCode();
+
+        return await response.Content.ReadFromJsonAsync<ImagePrepareResponse>(this.jsonRustSerializerOptions, token)
+            ?? throw new InvalidDataException("The Rust image preparation returned an empty response.");
+    }
+}