fix mistral system prompt

own_mcp/src/mcp/llmclient/mistral/mod.rs

@@ -130,7 +130,7 @@ impl LLMClient for Mistral {
         mut request: ollama_rs::generation::chat::request::ChatMessageRequest,
     ) -> Result<ChatMessageResponse, LLMError> {
         if let Some(first_message) = history.first() // add system prompt as first message
-            && first_message.role == MessageRole::System
+            && first_message.role != MessageRole::System
             && let Some(system_prompt) = self.system_prompt.clone()
         {
             history.insert(