fix(web): fetch error reporting (#7391)

open-api/typescript-sdk/fetch-errors.ts

@@ -0,0 +1,15 @@
+import { HttpError } from '@oazapfts/runtime';
+
+export interface ApiExceptionResponse {
+  message: string;
+  error?: string;
+  statusCode: number;
+}
+
+export interface ApiHttpError extends HttpError {
+  data: ApiExceptionResponse;
+}
+
+export function isHttpError(error: unknown): error is ApiHttpError {
+  return error instanceof HttpError;
+}

open-api/typescript-sdk/fetch.ts

@@ -1 +1,2 @@
 export * from './fetch-client';
+export * from './fetch-errors';