Rotation just does Keys::generate (IdentitySource::Random) — the old
seed-derived path was dropped in Build 8 — so it is functionally a random
add-identity-and-switch, and it does NOT carry the username or profile
over (it RELEASES the old name and hands the new key a nameless identity).
It therefore adds nothing over the identity switcher, so remove it: the
Settings entry row, the inline rotate flow (RotateState + rotate_ui) and
the now-unreachable Wallet::rotate_nostr_identity. Shared helpers
(unlock_all_identities, create_random, nip05::unregister) are untouched.
Drops the fifteen unused goblin.settings.rotate_* / key_rotated /
new_npub / backup_new_key / copy_new_nsec / rotation_failed keys from all
eight locales; drift + call-site tests green.
2ro
811eff825c