Showed the Rust compiler actually used on the information page (#1160)

app/MindWork AI Studio/Tools/Rust/RuntimeInfoResponse.cs

@@ -1,3 +1,11 @@
 namespace AIStudio.Tools.Rust;
 
-public readonly record struct RuntimeInfoResponse(string WorkingDirectory, string ExecutablePath, LinuxPackageType LinuxPackageType, InstallationKind InstallationKind);
+/// <summary>
+/// What the runtime tells about itself once the app starts.
+/// </summary>
+/// <param name="WorkingDirectory">The working directory of the runtime.</param>
+/// <param name="ExecutablePath">The path of the runtime's executable.</param>
+/// <param name="LinuxPackageType">How the Linux build was packaged.</param>
+/// <param name="InstallationKind">Whether and how the app may update itself.</param>
+/// <param name="RustVersion">The Rust compiler which built the runtime, e.g., "1.99.1 (commit 58cf8f9c3)". A runtime older than the app, as a development build may be, sends none.</param>
+public readonly record struct RuntimeInfoResponse(string WorkingDirectory, string ExecutablePath, LinuxPackageType LinuxPackageType, InstallationKind InstallationKind, string? RustVersion);