feat(social): local blocklist — hide blocked authors' offers, chats and incoming messages, with unblock management

apps/app_seeds/test/services/inbox_service_test.dart

@@ -61,6 +61,23 @@ void main() {
       text: text,
       at: DateTime.fromMillisecondsSinceEpoch(atMs));
 
+  test('messages from a blocked peer are dropped before storage', () async {
+    final settings = SocialSettings(InMemorySecretStore());
+    await settings.block('mallory');
+    inbox = InboxService(
+      connection: await offlineConnection(),
+      selfPubkey: 'me',
+      store: store,
+      settings: settings,
+    );
+
+    await inbox.ingest(msg('mallory', 'spam', 1000));
+    await inbox.ingest(msg('alice', 'hola', 2000));
+
+    final convos = await store.conversations();
+    expect(convos.single.peerPubkey, 'alice'); // mallory never landed
+  });
+
   test('an incoming message is persisted into its conversation', () async {
     await inbox.ingest(msg('alice', 'got seeds?', 1000));
     final convos = await store.conversations();

apps/app_seeds/test/services/social_settings_test.dart

@@ -71,4 +71,25 @@ void main() {
     await store.write('tane.social.search_precision', 'oops');
     expect(await SocialSettings(store).searchPrecision(), 4);
   });
+
+  test('the blocklist starts empty and round-trips block/unblock', () async {
+    expect(await settings.blockedPubkeys(), isEmpty);
+
+    await settings.block('AB' * 32);
+    expect(await settings.isBlocked('ab' * 32), isTrue); // normalised
+    expect(await settings.blockedPubkeys(), {'ab' * 32});
+
+    await settings.block('cd' * 32);
+    expect(await settings.blockedPubkeys(), hasLength(2));
+
+    await settings.unblock('ab' * 32);
+    expect(await settings.isBlocked('ab' * 32), isFalse);
+    expect(await settings.blockedPubkeys(), {'cd' * 32});
+  });
+
+  test('blocking twice keeps a single entry', () async {
+    await settings.block('ab' * 32);
+    await settings.block(' AB' * 1 + 'ab' * 31); // messy spacing/case
+    expect(await settings.blockedPubkeys(), hasLength(1));
+  });
 }