Add transmission timing details

test/models/message_reception_details_test.dart

@@ -0,0 +1,27 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/message_reception_details.dart';
+
+void main() {
+  test('round trips reception details json', () {
+    final details = MessageReceptionDetails(
+      capturedAt: DateTime.fromMillisecondsSinceEpoch(1700000000000),
+      packetLoggedAt: DateTime.fromMillisecondsSinceEpoch(1700000000500),
+      rssiDbm: -92,
+      snrDb: 7.5,
+      pathBytes: const [0xAA, 0xBB, 0xCC],
+      senderToReceiptMs: 4200,
+      estimatedTransmitMs: 1800,
+      postTransmitDelayMs: 2400,
+    );
+
+    final decoded = MessageReceptionDetails.fromJson(details.toJson());
+
+    expect(decoded, isNotNull);
+    expect(decoded!.rssiDbm, -92);
+    expect(decoded.snrDb, 7.5);
+    expect(decoded.pathBytesHex, 'aa:bb:cc');
+    expect(decoded.senderToReceiptMs, 4200);
+    expect(decoded.estimatedTransmitMs, 1800);
+    expect(decoded.postTransmitDelayMs, 2400);
+  });
+}

test/providers/messages_provider_retransmission_test.dart

@@ -40,7 +40,7 @@ void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
   group('MessagesProvider retransmission', () {
-    test('direct messages stay pending until delivery ACK arrives', () {
+    test('direct messages become sent before delivery ACK arrives', () {
       final provider = MessagesProvider();
       provider.addSentMessage(
         _buildDirectMessage('m1'),
@@ -51,7 +51,7 @@ void main() {
 
       expect(
         provider.messages.single.deliveryStatus,
-        MessageDeliveryStatus.sending,
+        MessageDeliveryStatus.sent,
       );
       expect(provider.messages.single.expectedAckTag, 77);
 
@@ -64,6 +64,24 @@ void main() {
       expect(provider.messages.single.roundTripTimeMs, 180);
     });
 
+    test('direct messages stay sent after device accept until confirm arrives', () {
+      final provider = MessagesProvider();
+      provider.addSentMessage(
+        _buildDirectMessage('m1b'),
+        contact: _buildContact(),
+      );
+
+      provider.markMessageSent('m1b', 78, 250);
+
+      expect(
+        provider.messages.single.deliveryStatus,
+        MessageDeliveryStatus.sent,
+      );
+      expect(provider.messages.single.expectedAckTag, 78);
+      expect(provider.messages.single.roundTripTimeMs, isNull);
+      expect(provider.messages.single.deliveredAt, isNull);
+    });
+
     test('channel messages are marked sent immediately', () {
       final provider = MessagesProvider();
       provider.addSentMessage(

test/utils/log_rx_route_decoder_test.dart

@@ -0,0 +1,92 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/utils/log_rx_route_decoder.dart';
+
+void main() {
+  group('LogRxRouteDecoder.decode', () {
+    test('parses route and sender from LOG_RX_DATA packet', () {
+      final packet = Uint8List.fromList([
+        0x88,
+        0x37,
+        0xae,
+        0x05,
+        0x04,
+        0xc2,
+        0xba,
+        0x5f,
+        0xde,
+        0x5c,
+      ]);
+
+      final decoded = LogRxRouteDecoder.decode(packet);
+
+      expect(decoded, isNotNull);
+      expect(decoded!.payloadType, 0x01);
+      expect(decoded.pathHashes, [0xc2, 0xba, 0x5f, 0xde]);
+      expect(decoded.originalSenderHash, 0xc2);
+    });
+  });
+
+  group('LogRxRouteDecoder.resolveHash', () {
+    test('prefers own node when hash matches device key', () {
+      final resolved = LogRxRouteDecoder.resolveHash(
+        0xc2,
+        contacts: const [],
+        ownPublicKey: Uint8List.fromList([0xc2, 0x01, 0x02]),
+        ownName: 'Base',
+      );
+
+      expect(resolved.isOwnNode, isTrue);
+      expect(resolved.label, 'Base (you)');
+    });
+
+    test('resolves unique contact by first public key byte', () {
+      final resolved = LogRxRouteDecoder.resolveHash(
+        0xc2,
+        contacts: [_contact(name: 'Alpha', keyPrefix: 0xc2)],
+      );
+
+      expect(resolved.isUniqueMatch, isTrue);
+      expect(resolved.label, 'Alpha');
+    });
+
+    test('marks ambiguous matches without pretending certainty', () {
+      final resolved = LogRxRouteDecoder.resolveHash(
+        0xc2,
+        contacts: [
+          _contact(name: 'Alpha', keyPrefix: 0xc2),
+          _contact(name: 'Bravo', keyPrefix: 0xc2),
+        ],
+      );
+
+      expect(resolved.isUniqueMatch, isFalse);
+      expect(resolved.matchCount, 2);
+    });
+  });
+}
+
+Contact _contact({required String name, required int keyPrefix}) {
+  return Contact(
+    publicKey: Uint8List.fromList([
+      keyPrefix,
+      0x11,
+      0x22,
+      0x33,
+      0x44,
+      0x55,
+      0x66,
+      0x77,
+    ]),
+    type: ContactType.chat,
+    flags: 0,
+    outPathLen: 0,
+    outPath: Uint8List(0),
+    advName: name,
+    lastAdvert: 0,
+    advLat: 0,
+    advLon: 0,
+    lastMod: 0,
+  );
+}