• A person can be renamed. Click the name on their card in the Persons tab. Until now a
  misspelling could only be fixed by deleting the person and starting over, which threw
  away every reference photo and every assignment made so far — a steep price for a typo.
  Reported in the community thread.
• Only the display name changes; photos, embeddings and assignments stay untouched. The
  internal folder keeps its original slug on purpose: it is referenced by stored files and
  image URLs, and a typo is no reason to move data around. The name is what is actually
  visible — in the UI, in the presence sensor and in the Frigate sub_label.
• Renaming to a name another person already has is refused with that reason, as is an empty
  name.