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

server/src/handlers/env.rs

@@ -270,4 +270,26 @@ mod tests {
         assert!(res3.contains("prod.local"));
         assert!(!res3.is_empty());
     }
+
+    #[tokio::test]
+    async fn test_empty_namespace_in_update_env_fingerprint() {
+        let dir = tempfile::tempdir().unwrap();
+        let state = Arc::new(MemoryState::new(dir.path().to_str().unwrap()));
+
+        let update_handler = UpdateEnvFingerprintHandler;
+        let args = serde_json::json!({
+            "namespace": "",
+            "tool_versions": {
+                "rustc": "1.70.0"
+            }
+        });
+
+        let res = update_handler
+            .execute(args, state.clone())
+            .await;
+
+        assert!(res.is_ok());
+    }
 }
+
+