If a non-mahram man accidentally sees a woman in her home, does she have to redo her iddah?

A woman observing 'iddah (waiting period) due to the death of her husband is not required to restart her 'iddah if a non-mahram man sees her in her home, whether intentionally or unintentionally. She is permitted to go out during the day, wearing full hijab, to fulfill her needs, but she must not spend the night anywhere but her own home. If a man sees her without her hijab, her 'iddah is not invalidated.