Improved additional API parameter validation (#686)

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

app/MindWork AI Studio/Provider/Mistral/ChatRequest.cs

@@ -14,11 +14,12 @@ public readonly record struct ChatRequest(
     string Model,
     IList<IMessageBase> Messages,
     bool Stream,
-    int RandomSeed,
+    [property: JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    int? RandomSeed,
     bool SafePrompt = false
 )
 {
     // Attention: The "required" modifier is not supported for [JsonExtensionData].
     [JsonExtensionData]
     public IDictionary<string, object> AdditionalApiParameters { get; init; } = new Dictionary<string, object>();
-}
+}

app/MindWork AI Studio/Provider/Mistral/ProviderMistral.cs

@@ -36,6 +36,8 @@ public sealed class ProviderMistral() : BaseProvider(LLMProviders.MISTRAL, "http
         
         // Parse the API parameters:
         var apiParameters = this.ParseAdditionalApiParameters();
+        var safePrompt = TryPopBoolParameter(apiParameters, "safe_prompt", out var parsedSafePrompt) && parsedSafePrompt;
+        var randomSeed = TryPopIntParameter(apiParameters, "random_seed", out var parsedRandomSeed) ? parsedRandomSeed : (int?)null;
 
         // Build the list of messages:
         var messages = await chatThread.Blocks.BuildMessagesUsingDirectImageUrlAsync(this.Provider, chatModel);
@@ -52,7 +54,8 @@ public sealed class ProviderMistral() : BaseProvider(LLMProviders.MISTRAL, "http
             
             // Right now, we only support streaming completions:
             Stream = true,
-            SafePrompt = apiParameters.TryGetValue("safe_prompt", out var value) && value is true,
+            RandomSeed = randomSeed,
+            SafePrompt = safePrompt,
             AdditionalApiParameters = apiParameters
         }, JSON_SERIALIZER_OPTIONS);
 
@@ -165,4 +168,4 @@ public sealed class ProviderMistral() : BaseProvider(LLMProviders.MISTRAL, "http
         var modelResponse = await response.Content.ReadFromJsonAsync<ModelsResponse>(token);
         return modelResponse;
     }
-}
+}