refactor(trust): ego-centric trust replaces the global Duniter membership

The global membership rule (curated bootstrap referents + sigQty/stepMax
parameters) solved sybil-proof identity for a UBI — a problem this app
doesn't have — and its screen leaked graph jargon (npub roots, parameter
steppers). Trust is now computed from the user's own position only:
you vouch / vouched by people you know (distance <=2) / vouched by N.

- TrustCubit: drop networkMember tier, referents and params; keep the
  circle rule and the 365-day vouch expiry (renewable, self-pruning).
- Delete TrustReferents, WotSettings, TrustNetworkScreen and the bundled
  referents asset; unwire injector/bootstrap/app/chat.
- New 'Your people' screen (/your-people, from the profile): who you
  vouch for (revocable) and who vouches for you, names via ProfileCache.
- i18n: wot.* removed, yourPeople.* added (en/es/pt/ast); trust.member
  removed. Kind 30777 events on relays stay fully compatible — only the
  interpretation changes.

apps/app_seeds/lib/bootstrap.dart

@@ -23,8 +23,6 @@ import 'services/social_connection.dart';
 import 'services/social_service.dart';
 import 'services/social_settings.dart';
 import 'services/sync_service.dart';
-import 'services/trust_referents.dart';
-import 'services/wot_settings.dart';
 import 'ui/theme.dart';
 
 /// Boots the app WITHOUT blocking the first frame: paints a splash immediately,
@@ -88,8 +86,6 @@ class _BootstrapState extends State<Bootstrap> {
       profileStore: getIt<ProfileStore>(),
       profileCache: getIt<ProfileCache>(),
       socialAccounts: getIt<SocialAccountStore>(),
-      trustReferents: getIt<TrustReferents>(),
-      wotSettings: getIt<WotSettings>(),
       inbox: inbox,
       notifications: notifications,
       showIntro: !await onboarding.introSeen(),