refactor: extract BLE protocol stack into meshcore_client package

Move BLE communication layer (command queue, frame parser/builder,
protocol constants, data models) into a standalone reusable Dart package
at ../meshcore_client. App model files become thin re-export wrappers,
keeping all existing consumers working without import changes.

lib/models/ble_packet_log.dart

@@ -1,121 +1,2 @@
-import 'dart:typed_data';
-import '../services/meshcore_opcode_names.dart';
-
-/// Decoded LOG_RX_DATA packet structure
-class LogRxDataInfo {
-  final int? airtimeMs;
-  final Uint8List? senderPublicKey;
-  final int? ackCode;
-  final List<String> embeddedStrings;
-  final double entropy;
-  final bool isLikelyEncrypted;
-  final double? snrDb;  // Signal-to-Noise Ratio in dB
-  final int? rssiDbm;   // Received Signal Strength Indicator in dBm
-
-  LogRxDataInfo({
-    this.airtimeMs,
-    this.senderPublicKey,
-    this.ackCode,
-    this.embeddedStrings = const [],
-    required this.entropy,
-    required this.isLikelyEncrypted,
-    this.snrDb,
-    this.rssiDbm,
-  });
-
-  /// Get sender public key as hex string (short)
-  String? get senderKeyShort {
-    if (senderPublicKey == null || senderPublicKey!.length < 6) return null;
-    return senderPublicKey!
-        .sublist(0, 6)
-        .map((b) => b.toRadixString(16).padLeft(2, '0'))
-        .join(':');
-  }
-
-  String get summary {
-    final parts = <String>[];
-    if (rssiDbm != null) parts.add('RSSI:${rssiDbm}dBm');
-    final snr = snrDb;
-    if (snr != null) parts.add('SNR:${snr.toStringAsFixed(1)}dB');
-    if (airtimeMs != null) parts.add('airtime:${airtimeMs}ms');
-    if (ackCode != null) parts.add('ACK:$ackCode');
-    if (senderKeyShort != null) parts.add('from:$senderKeyShort');
-    if (embeddedStrings.isNotEmpty) parts.add('strings:${embeddedStrings.length}');
-    if (isLikelyEncrypted) parts.add('encrypted');
-    return parts.join(', ');
-  }
-}
-
-/// Represents a logged BLE packet with timestamp and metadata
-class BlePacketLog {
-  final DateTime timestamp;
-  final Uint8List rawData;
-  final PacketDirection direction;
-  final int? responseCode;
-  final String? description;
-  final LogRxDataInfo? logRxDataInfo; // Decoded LOG_RX_DATA information
-
-  BlePacketLog({
-    required this.timestamp,
-    required this.rawData,
-    required this.direction,
-    this.responseCode,
-    this.description,
-    this.logRxDataInfo,
-  });
-
-  /// Convert raw data to hex string for display
-  String get hexData {
-    return rawData.map((b) => b.toRadixString(16).padLeft(2, '0')).join(' ');
-  }
-
-  /// Get opcode name for this packet
-  String get opcodeName {
-    if (responseCode == null) return 'N/A';
-    return MeshCoreOpcodeNames.getOpcodeName(
-      responseCode!,
-      isTx: direction == PacketDirection.tx,
-    );
-  }
-
-  /// Get full opcode description (name + hex code)
-  String get opcodeDescription {
-    if (responseCode == null) return 'N/A';
-    return MeshCoreOpcodeNames.getOpcodeDescription(
-      responseCode!,
-      isTx: direction == PacketDirection.tx,
-    );
-  }
-
-  /// Get short summary of the packet
-  String get summary {
-    final dir = direction == PacketDirection.rx ? 'RX' : 'TX';
-    final code = responseCode != null ? '0x${responseCode!.toRadixString(16).padLeft(2, '0')}' : 'N/A';
-    final name = responseCode != null ? opcodeName : '';
-    return '[$dir] $name Code: $code, Size: ${rawData.length} bytes';
-  }
-
-  /// Convert to CSV format for export
-  String toCsvRow() {
-    final dir = direction == PacketDirection.rx ? 'RX' : 'TX';
-    final code = responseCode?.toString() ?? '';
-    final name = responseCode != null ? opcodeName : '';
-    final hex = hexData;
-    final desc = description ?? '';
-    return '${timestamp.toIso8601String()},$dir,${rawData.length},$name,$code,"$hex","$desc"';
-  }
-
-  /// Convert to human-readable log format
-  String toLogString() {
-    final dir = direction == PacketDirection.rx ? 'RX' : 'TX';
-    final code = responseCode != null ? ' [$opcodeDescription]' : '';
-    final desc = description != null ? ' - $description' : '';
-    final logRxInfo = logRxDataInfo != null ? ' [${logRxDataInfo!.summary}]' : '';
-    return '${timestamp.toIso8601String()} [$dir]$code ${rawData.length} bytes: $hexData$desc$logRxInfo';
-  }
-}
-
-enum PacketDirection {
-  rx, // Received from device
-  tx, // Sent to device
-}
+export 'package:meshcore_client/meshcore_client.dart'
+    show BlePacketLog, PacketDirection, LogRxDataInfo;