Fixed chats not loading in the v26.10.1 pre-release and added a trim smoke test (#1128)

app/TrimSmokeTest/JsonRoots.cs

@@ -0,0 +1,65 @@
+using System.Text.Json;
+
+using AIStudio.Agents;
+using AIStudio.Agents.AssistantAudit;
+using AIStudio.Assistants.Builder;
+using AIStudio.Assistants.PromptOptimizer;
+using AIStudio.Assistants.SWOTAnalysis;
+using AIStudio.Assistants.VisualBriefing;
+using AIStudio.Chat;
+using AIStudio.Settings;
+using AIStudio.Settings.DataModel;
+using AIStudio.Settings.DataModel.PreviousModels;
+using AIStudio.Tools;
+using AIStudio.Tools.DataBackup;
+
+namespace AIStudio.TrimSmokeTest;
+
+/// <summary>
+/// The types which AI Studio reads or writes as JSON on their own, not only as part of another type.
+/// </summary>
+/// <remarks>
+/// Whatever these types hold, i.e., the types of their properties, the elements of their collections, and
+/// their derived types, gets checked along with them, so only the outermost types belong here. Add a type
+/// whenever AI Studio starts to store a new kind of file or to read a new kind of model answer.<br/><br/>
+///
+/// The answers of models are read with options of their own, which are private and only change names and
+/// leniency. The default options build the same contracts for the types of .NET they hold. A type which is
+/// private to its parser, such as the DTO of a slide deck, is out of reach here.
+/// </remarks>
+public static class JsonRoots
+{
+    public static readonly IReadOnlyList<JsonRoot> ALL =
+    [
+        // Chats, in the workspaces, among the temporary chats, and in chat archives:
+        new(typeof(ChatThread), WorkspaceBehaviour.JSON_OPTIONS),
+
+        // The settings, and their older versions, which the migrations still read:
+        new(typeof(Data), SettingsManager.JSON_OPTIONS),
+        new(typeof(DataV1V3), SettingsManager.JSON_OPTIONS),
+        new(typeof(DataV4), SettingsManager.JSON_OPTIONS),
+        new(typeof(DataV5), SettingsManager.JSON_OPTIONS),
+
+        // The projects of the Visual Briefing assistant:
+        new(typeof(VisualBriefingManifest), VisualBriefingJson.Persistence),
+        new(typeof(VisualBriefingBuildRecord), VisualBriefingJson.Persistence),
+        new(typeof(VisualBriefingEvidenceArtifact), VisualBriefingJson.Persistence),
+        new(typeof(VisualBriefingPlanArtifact), VisualBriefingJson.Persistence),
+        new(typeof(VisualBriefingContentArtifact), VisualBriefingJson.Persistence),
+        new(typeof(VisualBriefingPresentationArtifact), VisualBriefingJson.Persistence),
+
+        // Backups and their restore:
+        new(typeof(DataBackupManifest), DataBackupFormat.JSON_OPTIONS),
+        new(typeof(DataRestorePlan), DataBackupFormat.JSON_OPTIONS),
+        new(typeof(DataRestoreReport), DataBackupFormat.JSON_OPTIONS),
+
+        // Answers of models:
+        new(typeof(LuaResponse), JsonSerializerOptions.Default),
+        new(typeof(LauncherTextsResponse), JsonSerializerOptions.Default),
+        new(typeof(PromptOptimizationResult), JsonSerializerOptions.Default),
+        new(typeof(RetrievalContextValidationResult), JsonSerializerOptions.Default),
+        new(typeof(AssistantAuditResult), JsonSerializerOptions.Default),
+        new(typeof(SwotCategoryAnalysisResult), JsonSerializerOptions.Default),
+        new(typeof(SwotModerationResult), JsonSerializerOptions.Default),
+    ];
+}