#204 Error management (#237)

* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* fixed test breaking only in local because of timezone and reduced warnings for easier reading of tests results
* added error management for failure inside calendars imports
* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* added error management for failure inside calendars imports

Co-authored-by: Camille Moussu <cmoussu@linagora.com>

src/utils/errorUtils.ts

@@ -0,0 +1,9 @@
+export function formatReduxError(error: unknown): string {
+  if (!error) return "Unknown error";
+  if (typeof error === "string") return error;
+  if (typeof error === "object") {
+    const err = error as any;
+    if (err?.message) return err.message;
+  }
+  return "Unexpected error occurred";
+}