fix: remove meaningless return in useCrudMutation onSuccess

TanStack Query v5 ignores onSuccess return values. The 'return data'
statement was misleading, suggesting the return value mattered.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: ahaodev

web/src/hooks/use-crud-mutation.ts

@@ -60,7 +60,6 @@ export function useCrudMutation<TData = unknown, TVariables = void>(
           ? options.successMessage(data, variables)
           : options.successMessage
       toast.success(msg)
-      return data
     },
     onError: (error: unknown) => {
       toast.error(getErrorMessage(error, options.errorMessage))