Multibyte: fixed path trace repeater icon and potential bugs

lib/screens/ble_debug_log_screen.dart

@@ -9,6 +9,13 @@ import '../helpers/snack_bar_builder.dart';
 
 enum _BleLogView { frames, rawLogRx }
 
+int _decodeRawPathByteLen(int pathLenRaw) {
+  if (pathLenRaw == 0xFF || pathLenRaw == 0) return 0;
+  final hashCount = pathLenRaw & 0x3F;
+  final hashWidth = ((pathLenRaw >> 6) & 0x03) + 1;
+  return hashCount * hashWidth;
+}
+
 class BleDebugLogScreen extends StatefulWidget {
   const BleDebugLogScreen({super.key});
 
@@ -208,16 +215,17 @@ class _BleDebugLogScreenState extends State<BleDebugLogScreen> {
         rawHex: _bytesToHex(raw),
       );
     }
-    final pathLen = raw[index++];
-    if (raw.length < index + pathLen) {
+    final pathLenRaw = raw[index++];
+    final pathByteLen = _decodeRawPathByteLen(pathLenRaw);
+    if (raw.length < index + pathByteLen) {
       return _RawPacketInfo(
         title: 'RX RAW_LOG_RX_DATA • ${_payloadTypeLabel(payloadType)}',
         summary: 'Truncated path',
         rawHex: _bytesToHex(raw),
       );
     }
-    final pathBytes = raw.sublist(index, index + pathLen);
-    index += pathLen;
+    final pathBytes = raw.sublist(index, index + pathByteLen);
+    index += pathByteLen;
     if (raw.length <= index) {
       return _RawPacketInfo(
         title: 'RX RAW_LOG_RX_DATA • ${_payloadTypeLabel(payloadType)}',
@@ -230,7 +238,7 @@ class _BleDebugLogScreenState extends State<BleDebugLogScreen> {
     final title =
         'RX ${_payloadTypeLabel(payloadType)} • ${_routeLabel(routeType)} • v$payloadVer';
     final summary = _decodePayloadSummary(payloadType, payload);
-    final pathSummary = pathLen > 0
+    final pathSummary = pathByteLen > 0
         ? 'Path=${_bytesToHex(pathBytes)}'
         : 'Path=none';
     final detail = '$summary • $pathSummary • len=${raw.length}';