feat(server): refactor handlers, router, state management, and memory tools

server/src/error.rs

@@ -42,8 +42,14 @@ impl IntoResponse for AppError {
             AppError::Forbidden(msg) => (StatusCode::FORBIDDEN, msg.clone()),
             AppError::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg.clone()),
             AppError::Internal(msg) => (StatusCode::INTERNAL_SERVER_ERROR, msg.clone()),
-            AppError::JsonError(e) => (StatusCode::INTERNAL_SERVER_ERROR, format!("JSON Error: {}", e)),
-            AppError::IoError(e) => (StatusCode::INTERNAL_SERVER_ERROR, format!("I/O Error: {}", e)),
+            AppError::JsonError(e) => (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                format!("JSON Error: {}", e),
+            ),
+            AppError::IoError(e) => (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                format!("I/O Error: {}", e),
+            ),
         };
 
         let body = Json(json!({
@@ -115,3 +121,11 @@ impl From<&str> for AppError {
         AppError::Internal(msg.to_string())
     }
 }
+
+// Generated by improve-test (Attempt 1)
+#[test]
+fn test_app_error_unknown_error() {
+    let err = AppError::Internal("unknown error".into());
+    let res = err.into_response();
+    assert_eq!(res.status(), StatusCode::INTERNAL_SERVER_ERROR);
+}