Read the context window from four more model lists

app/MindWork AI Studio/Provider/Groq/GroqModel.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Provider.Groq;
+
+/// <summary>
+/// One model as Groq lists it.
+/// </summary>
+/// <remarks>
+/// Groq says more about a model than the shared OpenAI-compatible list does, which is why this
+/// provider brings a data model of its own instead of using that one: the shared record is read by
+/// a dozen providers, and a field only one of them sends has no business in it.
+/// </remarks>
+/// <param name="Id">The model's ID.</param>
+/// <param name="ContextWindowTokens">How much the model reads and writes in one conversation, in tokens.</param>
+public readonly record struct GroqModel(string Id, [property: JsonPropertyName("context_window")] int? ContextWindowTokens);

app/MindWork AI Studio/Provider/Groq/GroqModelsResponse.cs

@@ -0,0 +1,7 @@
+namespace AIStudio.Provider.Groq;
+
+/// <summary>
+/// A data model for the response from the Groq models endpoint.
+/// </summary>
+/// <param name="Data">The models Groq serves.</param>
+public readonly record struct GroqModelsResponse(IList<GroqModel> Data);

app/MindWork AI Studio/Provider/Groq/ProviderGroq.cs

@@ -1,6 +1,7 @@
 using System.Runtime.CompilerServices;
 
 using AIStudio.Chat;
+using AIStudio.Models.Live;
 using AIStudio.Provider.OpenAI;
 using AIStudio.Settings;
 
@@ -113,10 +114,12 @@ public class ProviderGroq() : BaseProvider(LLMProviders.GROQ, new Uri("https://a
 
     private Task<ModelLoadResult> LoadModels(SecretStoreType storeType, string? apiKeyProvisional, CancellationToken token)
     {
-        return this.LoadModelsResponse<ModelsResponse>(
+        return this.LoadModelsResponse<GroqModelsResponse>(
             storeType,
             "models",
-            modelResponse => modelResponse.Data,
-            apiKeyProvisional, token: token);
+            modelResponse => modelResponse.Data.Select(n => new Model(n.Id, null)),
+            apiKeyProvisional,
+            listingFactory: modelResponse => modelResponse.Data.Select(n => ModelListing.For(n.Id, n.ContextWindowTokens)),
+            token: token);
     }
 }