Added detailed plugin information to the plugins page (#1013)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/PluginSystem/Assistants/DirectChatLauncherLuaWriter.cs

@@ -69,11 +69,15 @@ public static class DirectChatLauncherLuaWriter
     /// <summary>
     /// Writes the complete plugin.lua for an installed launcher whose settings changed.
     /// </summary>
+    /// <remarks>
+    /// All metadata is carried over except the time of the last change: changing the settings
+    /// changes the plugin, so that time becomes now.
+    /// </remarks>
     /// <param name="plugin">The installed launcher whose metadata is carried over.</param>
     /// <param name="definition">The name, title, description, and chat settings the user chose.</param>
     /// <returns>The plugin.lua content, ready to be validated and written.</returns>
     public static string Write(PluginAssistants plugin, DirectChatLauncherDefinition definition) =>
-        Write(DirectChatLauncherPluginMetadata.FromPlugin(plugin), definition);
+        Write(DirectChatLauncherPluginMetadata.FromPlugin(plugin) with { LastChanged = DateTimeOffset.UtcNow }, definition);
 
     /// <summary>
     /// Writes the complete plugin.lua for a launcher.
@@ -114,6 +118,13 @@ public static class DirectChatLauncherLuaWriter
         builder.AppendLine($"VERSION = \"{plugin.Version}\"");
         builder.AppendLine();
 
+        if (plugin.LastChanged is { } lastChanged)
+        {
+            builder.AppendLine("-- When this plugin was last changed, in UTC, formatted as YYYY-MM-DDTHH:MM:SSZ. Optional.");
+            builder.AppendLine($"LAST_CHANGED = \"{PluginBase.FormatLastChanged(lastChanged)}\"");
+            builder.AppendLine();
+        }
+
         builder.AppendLine("-- The type of the plugin:");
         builder.AppendLine($"TYPE = \"{nameof(PluginType.ASSISTANT)}\"");
         builder.AppendLine();

app/MindWork AI Studio/Tools/PluginSystem/Assistants/DirectChatLauncherPluginMetadata.cs

@@ -10,6 +10,7 @@ namespace AIStudio.Tools.PluginSystem.Assistants;
 /// </remarks>
 /// <param name="Id">The plugin ID, which stays with the plugin for its whole life.</param>
 /// <param name="Version">The plugin version, as it appears in the Lua file.</param>
+/// <param name="LastChanged">When the plugin was last changed, in UTC, when it states it.</param>
 /// <param name="Authors">The authors of the plugin.</param>
 /// <param name="SupportContact">Where users turn with questions about this plugin.</param>
 /// <param name="SourceURL">Where the plugin comes from.</param>
@@ -18,12 +19,12 @@ namespace AIStudio.Tools.PluginSystem.Assistants;
 /// <param name="IsMaintained">Whether the plugin is still maintained.</param>
 /// <param name="DeprecationMessage">What users are told when the plugin is deprecated.</param>
 /// <param name="IsAssistantBuilderGenerated">Whether the Assistant Builder created this plugin.</param>
-public sealed record DirectChatLauncherPluginMetadata(Guid Id, string Version, IReadOnlyList<string> Authors, string SupportContact, string SourceURL,
+public sealed record DirectChatLauncherPluginMetadata(Guid Id, string Version, DateTimeOffset? LastChanged, IReadOnlyList<string> Authors, string SupportContact, string SourceURL,
     IReadOnlyList<PluginCategory> Categories, IReadOnlyList<PluginTargetGroup> TargetGroups, bool IsMaintained, string DeprecationMessage, bool IsAssistantBuilderGenerated)
 {
     /// <summary>
     /// Takes the metadata of an installed launcher for the case where one is edited.
     /// </summary>
-    public static DirectChatLauncherPluginMetadata FromPlugin(PluginAssistants plugin) => new(plugin.Id, plugin.Version.ToString(), plugin.Authors,
+    public static DirectChatLauncherPluginMetadata FromPlugin(PluginAssistants plugin) => new(plugin.Id, plugin.Version.ToString(), plugin.LastChanged, plugin.Authors,
         plugin.SupportContact, plugin.SourceURL, plugin.Categories, plugin.TargetGroups, plugin.IsMaintained, plugin.DeprecationMessage, plugin.IsAssistantBuilderGenerated);
 }