feat(mcp): implement Prompts capability, Resources, and clean up daemon architecture

server/src/error.rs

@@ -37,3 +37,54 @@ impl IntoResponse for AppError {
         (status, body).into_response()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use axum::response::IntoResponse;
+    use axum::http::StatusCode;
+
+    #[test]
+    fn test_app_error_not_found() {
+        let err = AppError::NotFound("item not found".into());
+        let res = err.into_response();
+        assert_eq!(res.status(), StatusCode::NOT_FOUND);
+    }
+
+    #[test]
+    fn test_app_error_forbidden() {
+        let err = AppError::Forbidden("access denied".into());
+        let res = err.into_response();
+        assert_eq!(res.status(), StatusCode::FORBIDDEN);
+    }
+
+    #[test]
+    fn test_app_error_internal() {
+        let err = AppError::Internal("db error".into());
+        let res = err.into_response();
+        assert_eq!(res.status(), StatusCode::INTERNAL_SERVER_ERROR);
+    }
+
+    #[test]
+    fn test_app_error_bad_request() {
+        let err = AppError::BadRequest("invalid json".into());
+        let res = err.into_response();
+        assert_eq!(res.status(), StatusCode::BAD_REQUEST);
+    }
+
+    #[test]
+    fn test_app_error_display() {
+        let err = AppError::NotFound("test".into());
+        assert_eq!(err.to_string(), "Not Found: test");
+        
+        let err = AppError::Forbidden("test".into());
+        assert_eq!(err.to_string(), "Forbidden: test");
+        
+        let err = AppError::Internal("test".into());
+        assert_eq!(err.to_string(), "Internal Server Error: test");
+        
+        let err = AppError::BadRequest("test".into());
+        assert_eq!(err.to_string(), "Bad Request: test");
+    }
+}
+