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feat(identity): switch social identity, all from the one backup

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Adds pseudonymous, switchable social identities derived from the SAME root
seed via an account index (NostrKeyDerivation.deriveFromSeed(seed, account)).
HKDF is one-way so accounts are unlinkable to the Ğ1 key; account 0 is the
original identity, byte-for-byte unchanged (no rotation for current users),
and every account regenerates from the single seed — so switching adds
nothing to back up.

- SocialAccountStore: keystore-backed active account + max created.
- Per-identity stores (chats, profile, name cache) namespaced by account
  scope (account 0 = legacy keys, no migration) so identities never mix.
- switchSocialAccount() re-derives the identity, re-scopes the stores and
  restarts the inbox listener; RestartWidget rebuilds the tree to pick up
  the new social singletons. DB/inventory untouched.
- Profile 'Your identities' switcher: list, create, switch (with a note
  that messages/contacts are kept separate per identity). i18n en/es/pt/ast.

Tests: account-indexed derivation (legacy 0 unchanged, accounts distinct
yet deterministic, negatives rejected); SocialAccountStore; per-identity
store scope isolation. Resolves the flagged 'change identity' decision
(open-decisions §B).

Known: switching resets navigation to home (full tree rebuild).
This commit is contained in:
vjrj 2026-07-10 20:20:04 +02:00
parent d36fd05741
commit 993f7b37ab
25 changed files with 597 additions and 33 deletions
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15
apps/app_seeds/lib/services/profile_store.dart
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@ -4,12 +4,19 @@ import '../security/secret_store.dart';
/// no plaintext at rest). The network copy is a published NIP-01 kind:0 event;
/// this local copy prefills the editor and works offline.
class ProfileStore {
ProfileStore(this._store);
/// [accountScope] namespaces the keys per social identity (empty = the
/// original identity's legacy keys). See [socialAccountScope].
ProfileStore(this._store, {String accountScope = ''})
: _base = accountScope.isEmpty
? 'tane.social.profile.'
: 'tane.social.$accountScope.profile.';
final SecretStore _store;
static const _nameKey = 'tane.social.profile.name';
static const _aboutKey = 'tane.social.profile.about';
static const _g1Key = 'tane.social.profile.g1';
final String _base;
String get _nameKey => '${_base}name';
String get _aboutKey => '${_base}about';
String get _g1Key => '${_base}g1';
Future<String> name() async => (await _store.read(_nameKey)) ?? '';
Future<String> about() async => (await _store.read(_aboutKey)) ?? '';