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/di/injector.dart

@@ -43,9 +43,7 @@ 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/unread_service.dart';
-import '../services/wot_settings.dart';
 
 /// The app's service locator. Kept to the composition root — widgets get their
 /// repositories from here (or via BlocProvider), never by reaching into it deep
@@ -170,9 +168,6 @@ Future<void> configureDependencies() async {
     ..registerSingleton<LocaleStore>(LocaleStore(secretStore))
     ..registerSingleton<SocialSettings>(SocialSettings(secretStore))
     ..registerSingleton<SocialAccountStore>(accounts)
-    // Web of trust: network-wide (not per-identity), so registered once.
-    ..registerSingleton<TrustReferents>(TrustReferents(secretStore))
-    ..registerSingleton<WotSettings>(WotSettings(secretStore))
     ..registerSingleton<OfferOutbox>(OfferOutbox(secretStore))
     // Per-identity stores are namespaced by the active account's scope.
     ..registerSingleton<MessageStore>(