Šepot — end-to-end encrypted messenger

Initial public release. Anonymous on-device identity (no phone number,
e-mail, or password), Signal-protocol cryptography (X3DH + PQXDH, Double
Ratchet, sealed sender) via libsignal, a metadata-minimizing relay,
group chats, disappearing messages, encrypted local storage, optional
Tor transport, and a UI localized into Czech, English, German, Russian,
and Italian.

Monorepo: Flutter client (app/), Rust relay + wire types (rust/),
protobuf definitions (proto/), self-host deploy (deploy/).

Licensed under AGPL-3.0 with an app-store distribution exception (§7).

app/test/message_core_test.dart

@@ -0,0 +1,35 @@
+import 'dart:convert';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:sepot/models/message.dart';
+
+void main() {
+  test('reakce/edit/delete přežijí JSON roundtrip', () {
+    final m = Message.text(senderId: 'me', recipientId: 'you', content: 'ahoj')
+        .copyWith(
+      reactions: {'FP1': '👍', 'FP2': '❤️'},
+      editedAt: DateTime.parse('2026-07-06T20:00:00.000'),
+    );
+    final back =
+        Message.fromJson(jsonDecode(jsonEncode(m.toJson())) as Map<String, dynamic>);
+    expect(back.reactions, {'FP1': '👍', 'FP2': '❤️'});
+    expect(back.editedAt, isNotNull);
+    expect(back.isDeleted, isFalse);
+  });
+
+  test('smazaná zpráva: isDeleted + prázdný obsah', () {
+    final m = Message.text(senderId: 'me', recipientId: 'you', content: 'x')
+        .copyWith(isDeleted: true, content: '', reactions: const {});
+    final back =
+        Message.fromJson(jsonDecode(jsonEncode(m.toJson())) as Map<String, dynamic>);
+    expect(back.isDeleted, isTrue);
+    expect(back.content, '');
+  });
+
+  test('reply nese replyToId', () {
+    final m = Message.text(
+        senderId: 'me', recipientId: 'you', content: 'odpoved', replyToId: 'abc');
+    final back =
+        Message.fromJson(jsonDecode(jsonEncode(m.toJson())) as Map<String, dynamic>);
+    expect(back.replyToId, 'abc');
+  });
+}