Add hash-based acceptance to track content changes

app/MindWork AI Studio/Components/MandatoryInfoDisplay.razor

@@ -7,18 +7,28 @@
 
     @if (this.ShowAcceptanceMetadata)
     {
-        @if (this.Acceptance is null)
+        @if (this.AcceptanceStatus is MandatoryInfoAcceptanceStatus.MISSING)
         {
             <MudAlert Severity="Severity.Warning" Variant="Variant.Outlined" Dense="@true">
                 @T("This mandatory info has not been accepted yet.")
             </MudAlert>
         }
-        else if (!string.Equals(this.Acceptance.AcceptedVersion, this.Info.VersionText, StringComparison.Ordinal))
+        else if (this.AcceptanceStatus is MandatoryInfoAcceptanceStatus.VERSION_CHANGED)
         {
             <MudAlert Severity="Severity.Warning" Variant="Variant.Outlined" Dense="@true">
-                @T("The current version has not been accepted yet.")
+                @T("A new version of the terms is available. Please review it again.")
                 <br />
-                @T("Last accepted version"): @this.Acceptance.AcceptedVersion
+                @T("Last accepted version"): @this.Acceptance!.AcceptedVersion
+                <br />
+                @T("Accepted at (UTC)"): @this.Acceptance.AcceptedAtUtc.UtcDateTime.ToString("u")
+            </MudAlert>
+        }
+        else if (this.AcceptanceStatus is MandatoryInfoAcceptanceStatus.CONTENT_CHANGED)
+        {
+            <MudAlert Severity="Severity.Warning" Variant="Variant.Outlined" Dense="@true">
+                @T("Please review this text again. The content was changed.")
+                <br />
+                @T("Last accepted version"): @this.Acceptance!.AcceptedVersion
                 <br />
                 @T("Accepted at (UTC)"): @this.Acceptance.AcceptedAtUtc.UtcDateTime.ToString("u")
             </MudAlert>
@@ -26,7 +36,7 @@
         else
         {
             <MudAlert Severity="Severity.Success" Variant="Variant.Outlined" Dense="@true">
-                @T("Accepted version"): @this.Acceptance.AcceptedVersion
+                @T("Accepted version"): @this.Acceptance!.AcceptedVersion
                 <br />
                 @T("Accepted at (UTC)"): @this.Acceptance.AcceptedAtUtc.UtcDateTime.ToString("u")
             </MudAlert>

app/MindWork AI Studio/Components/MandatoryInfoDisplay.razor.cs

@@ -6,6 +6,14 @@ namespace AIStudio.Components;
 
 public partial class MandatoryInfoDisplay
 {
+    private enum MandatoryInfoAcceptanceStatus
+    {
+        MISSING,
+        VERSION_CHANGED,
+        CONTENT_CHANGED,
+        ACCEPTED,
+    }
+
     [Parameter]
     public DataMandatoryInfo Info { get; set; } = new();
 
@@ -14,4 +22,21 @@ public partial class MandatoryInfoDisplay
 
     [Parameter]
     public bool ShowAcceptanceMetadata { get; set; }
+
+    private MandatoryInfoAcceptanceStatus AcceptanceStatus
+    {
+        get
+        {
+            if (this.Acceptance is null)
+                return MandatoryInfoAcceptanceStatus.MISSING;
+
+            if (!string.Equals(this.Acceptance.AcceptedVersion, this.Info.VersionText, StringComparison.Ordinal))
+                return MandatoryInfoAcceptanceStatus.VERSION_CHANGED;
+
+            if (!string.Equals(this.Acceptance.AcceptedHash, this.Info.GetAcceptanceHash(), StringComparison.Ordinal))
+                return MandatoryInfoAcceptanceStatus.CONTENT_CHANGED;
+
+            return MandatoryInfoAcceptanceStatus.ACCEPTED;
+        }
+    }
 }

app/MindWork AI Studio/Layout/MainLayout.razor.cs

@@ -418,7 +418,7 @@ public partial class MainLayout : LayoutComponentBase, IMessageBusReceiver, ILan
             .Where(info =>
             {
                 var acceptance = this.SettingsManager.ConfigurationData.MandatoryInformation.FindAcceptance(info.Id);
-                return acceptance is null || acceptance.AcceptedVersion != info.VersionText;
+                return acceptance is null || !string.Equals(acceptance.AcceptedHash, info.GetAcceptanceHash(), StringComparison.Ordinal);
             });
     }
 
@@ -441,6 +441,7 @@ public partial class MainLayout : LayoutComponentBase, IMessageBusReceiver, ILan
         {
             InfoId = info.Id,
             AcceptedVersion = info.VersionText,
+            AcceptedHash = info.GetAcceptanceHash(),
             AcceptedAtUtc = DateTimeOffset.UtcNow,
             EnterpriseConfigurationPluginId = info.EnterpriseConfigurationPluginId,
         };

app/MindWork AI Studio/Plugins/configuration/plugin.lua

@@ -267,6 +267,8 @@ CONFIG["CHAT_TEMPLATES"] = {}
 CONFIG["DOCUMENT_ANALYSIS_POLICIES"] = {}
 
 -- Mandatory infos that users must explicitly accept before using AI Studio:
+-- AI Studio asks users again when Version, Title, or Markdown change.
+-- Changing Version additionally allows the UI to communicate that a new version is available.
 CONFIG["MANDATORY_INFOS"] = {}
 
 -- An example mandatory info:

app/MindWork AI Studio/Settings/DataModel/DataMandatoryInfo.cs

@@ -1,3 +1,6 @@
+using System.Security.Cryptography;
+using System.Text;
+
 using Lua;
 
 namespace AIStudio.Settings.DataModel;
@@ -22,7 +25,8 @@ public sealed record DataMandatoryInfo
     public string Title { get; private init; } = string.Empty;
 
     /// <summary>
-    /// The configured version string. When it changes, the user must accept the text again.
+    /// The configured version string shown to the user. A changed version triggers re-acceptance
+    /// and allows the UI to distinguish a new version from a content-only change.
     /// </summary>
     public string VersionText { get; private init; } = string.Empty;
 
@@ -41,6 +45,13 @@ public sealed record DataMandatoryInfo
     /// </summary>
     public string RejectButtonText { get; private init; } = string.Empty;
 
+    public string GetAcceptanceHash()
+    {
+        var content = $"Version:{this.VersionText}\nTitle:{this.Title}\nMarkdown:{this.Markdown}";
+        var hash = SHA256.HashData(Encoding.UTF8.GetBytes(content));
+        return Convert.ToHexString(hash);
+    }
+
     public static bool TryParseConfiguration(int idx, LuaTable table, Guid configPluginId, out DataMandatoryInfo mandatoryInfo)
     {
         mandatoryInfo = new DataMandatoryInfo();

app/MindWork AI Studio/Settings/DataModel/DataMandatoryInfoAcceptance.cs

@@ -12,6 +12,11 @@ public sealed record DataMandatoryInfoAcceptance
     /// </summary>
     public string AcceptedVersion { get; init; } = string.Empty;
 
+    /// <summary>
+    /// The accepted hash of the mandatory info content.
+    /// </summary>
+    public string AcceptedHash { get; init; } = string.Empty;
+
     /// <summary>
     /// The UTC time of the acceptance.
     /// </summary>