refactor: consolidate nvim crates, extract server library, and update workspace dependencies

server/src/ollama.rs

@@ -234,3 +234,11 @@ mod tests {
         assert!(!client.is_available().await);
     }
 }
+
+#[tokio::test]
+async fn test_ollama_client_invalid_api_key() {
+    let mut client = OllamaClient::new_from_env();
+    client.base_url = "http://invalid-api-key:11434".to_string();
+    assert!(!client.is_available().await);
+}
+