Added the BeyondFacts Lab as a prototype (#1175)

app/MindWork AI Studio/Assistants/BeyondFactsLab/BflNotice.cs

@@ -0,0 +1,50 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// The notes which the BeyondFacts Lab shows before the first use, and again whenever their text changes.
+/// </summary>
+/// <remarks>
+/// The notes are a text of the localization, so they come in every language of the app. The settings keep a hash of
+/// the notes as the app showed them when the person confirmed them. A new wording, in English or in a translation,
+/// therefore shows them again, and so does a switch to another language, whose notes the person has not read yet.
+/// </remarks>
+public static class BflNotice
+{
+    private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(BflNotice).Namespace, nameof(BflNotice));
+
+    /// <summary>
+    /// Gets the notes in the language of the app, as Markdown.
+    /// </summary>
+    public static string Text => TB("""
+        ## Welcome!
+
+        The BeyondFacts Lab guides you through an AI-supported process of reflection, which helps you take a position in challenging communication situations and stay able to communicate.
+
+        Data protection depends on the AI provider you choose, its rules for processing and storing data, and your configuration. Enter only data that are suitable and approved for this.
+
+        Please check all results critically. Depending on the AI model, the answers may differ. Hallucinations cannot be ruled out.
+
+        This is a prototype, so we look forward to your feedback.
+        """);
+
+    /// <summary>
+    /// Computes the hash of the notes as the app shows them.
+    /// </summary>
+    /// <remarks>
+    /// Line endings and the space around the text do not count, so that a build from a checkout with other line endings
+    /// does not show the notes again.
+    /// </remarks>
+    /// <param name="notes">The notes, as the app shows them.</param>
+    /// <returns>The hash, as lowercase hexadecimal digits.</returns>
+    public static string ComputeHash(string notes) => Convert.ToHexStringLower(SHA256.HashData(Encoding.UTF8.GetBytes(notes.ReplaceLineEndings("\n").Trim())));
+
+    /// <summary>
+    /// Gets whether the person confirmed the notes as the app shows them now.
+    /// </summary>
+    /// <param name="acceptedHash">The hash the settings keep.</param>
+    /// <param name="currentHash">The hash of the notes as the app shows them now.</param>
+    public static bool IsAccepted(string acceptedHash, string currentHash) => string.Equals(acceptedHash, currentHash, StringComparison.OrdinalIgnoreCase);
+}