chore: Initial commit

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XPovRHpejR4zRxuhjY4Qs3

lib/models/message.dart

@@ -0,0 +1,83 @@
+export 'package:meshcore_client/meshcore_client.dart'
+    show
+        Message,
+        MessageType,
+        MessageTextType,
+        MessageDeliveryStatus,
+        MessageRecipient;
+
+import 'package:flutter/foundation.dart';
+import 'package:meshcore_client/meshcore_client.dart';
+import 'sar_marker.dart';
+import 'map_coordinate_space.dart';
+import '../utils/voice_message_parser.dart';
+
+extension MessageVoiceExtension on Message {
+  /// True when this message is a voice recording (`V:` text or binary voice).
+  bool get isVoiceMessage => isVoice;
+
+  /// Parses the voice packet mode from the stored [voiceId] session info.
+  /// Returns null for non-voice messages.
+  VoicePacketMode? get voicePacketMode {
+    if (!isVoice || text.isEmpty) return null;
+    final envelope = VoiceEnvelope.tryParseText(text);
+    if (envelope != null) return envelope.mode;
+    final pkt = VoicePacket.tryParseText(text);
+    return pkt?.mode;
+  }
+}
+
+extension MessageSarExtension on Message {
+  /// Infer the [SarMarkerType] from stored SAR fields.
+  /// Returns null if this is not a SAR marker message.
+  SarMarkerType? get sarMarkerType {
+    if (!isSarMarker) return null;
+
+    if (sarCustomEmoji != null && sarCustomEmoji!.isNotEmpty) {
+      return SarMarkerType.fromEmoji(sarCustomEmoji!);
+    }
+
+    final trimmed = text.trim();
+    if (!trimmed.startsWith('S:')) return null;
+
+    final parts = trimmed.split(':');
+    if (parts.length < 3) return null;
+
+    return SarMarkerType.fromEmoji(parts[1]);
+  }
+
+  /// Convert to a [SarMarker] if this message contains SAR data.
+  SarMarker? toSarMarker() {
+    if (!isSarMarker || sarMarkerType == null) {
+      return null;
+    }
+
+    debugPrint('📍 [Message.toSarMarker] Converting to marker:');
+    debugPrint('   message.text: "$text"');
+    debugPrint('   message.sarNotes: "$sarNotes"');
+    debugPrint('   message.sarMarkerType: $sarMarkerType');
+    debugPrint('   message.sarCustomEmoji: "$sarCustomEmoji"');
+
+    final coordinateSpace = sarCustomMapPoint != null && sarCustomMapId != null
+        ? MapCoordinateSpace.customMap
+        : MapCoordinateSpace.geo;
+    final location = sarCustomMapPoint ?? sarGpsCoordinates;
+    if (location == null) {
+      return null;
+    }
+
+    return SarMarker(
+      id: id,
+      type: sarMarkerType!,
+      location: location,
+      timestamp: sentAt,
+      senderPublicKey: senderPublicKeyPrefix,
+      senderName: senderName,
+      notes: sarNotes,
+      customEmoji: sarCustomEmoji,
+      colorIndex: sarColorIndex,
+      coordinateSpace: coordinateSpace,
+      mapId: sarCustomMapId,
+    );
+  }
+}