Add check for vision capabilities

src/ai/mod.rs

@@ -11,5 +11,5 @@ pub use handlers::{
     get_available_models_handler, get_insight_handler,
 };
 pub use insight_generator::InsightGenerator;
-pub use ollama::OllamaClient;
+pub use ollama::{ModelCapabilities, OllamaClient};
 pub use sms_client::{SmsApiClient, SmsMessage};