Add Insights Model Discovery and Fallback Handling

src/ai/mod.rs

@@ -4,7 +4,8 @@ pub mod ollama;
 pub mod sms_client;
 
 pub use handlers::{
-    delete_insight_handler, generate_insight_handler, get_all_insights_handler, get_insight_handler,
+    delete_insight_handler, generate_insight_handler, get_all_insights_handler,
+    get_available_models_handler, get_insight_handler,
 };
 pub use insight_generator::InsightGenerator;
 pub use ollama::OllamaClient;