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/ui/profile_screen.dart

@@ -22,7 +22,7 @@ class ProfileScreen extends StatefulWidget {
     required this.connection,
     required this.profileStore,
     required this.accounts,
-    this.trustNetworkEnabled = false,
+    this.yourPeopleEnabled = false,
     super.key,
   });
 
@@ -33,8 +33,8 @@ class ProfileScreen extends StatefulWidget {
   final ProfileStore profileStore;
   final SocialAccountStore accounts;
 
-  /// Whether to offer the "Network of trust" entry (needs the WoT services).
-  final bool trustNetworkEnabled;
+  /// Whether to offer the "Your people" entry (needs the social layer).
+  final bool yourPeopleEnabled;
 
   @override
   State<ProfileScreen> createState() => _ProfileScreenState();
@@ -210,16 +210,17 @@ class _ProfileScreenState extends State<ProfileScreen> {
                   onSwitch: (a) => _switchTo(a),
                   onNew: _newIdentity,
                 ),
-                if (widget.trustNetworkEnabled) ...[
+                if (widget.yourPeopleEnabled) ...[
                   const SizedBox(height: 12),
                   const Divider(),
                   ListTile(
-                    key: const Key('profile.trustNetwork'),
+                    key: const Key('profile.yourPeople'),
                     contentPadding: EdgeInsets.zero,
-                    leading: const Icon(Icons.hub_outlined, color: seedGreen),
-                    title: Text(t.wot.open),
+                    leading:
+                        const Icon(Icons.people_alt_outlined, color: seedGreen),
+                    title: Text(t.yourPeople.title),
                     trailing: const Icon(Icons.chevron_right, color: seedMuted),
-                    onTap: () => context.push('/trust'),
+                    onTap: () => context.push('/your-people'),
                   ),
                 ],
               ],