fix(map): award boundary fixes — HK/MO labels, MO DXCC entity 152, antimeridian ring closure

- wapc/dxcc assets: add Hong Kong & Macau labels (forceLabel) and MO boundary in dxcc
- AwardBoundaryOverlay: rings split at antimeridian no longer close() per segment — removes spurious Russia cross-continent chord
- AwardCalculator: Macau DXCC entity 330 -> 152 (+test)
- Settings LoTW dialog: add sync duration hint (zh/en)

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsDialog.kt

@@ -268,6 +268,12 @@ fun LoTWDialog(
             style = MaterialTheme.typography.bodySmall,
             modifier = Modifier.padding(horizontal = LocalSpacing.current.large)
         )
+        Text(
+            text = stringResource(R.string.prefs_lotw_sync_duration_hint),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(horizontal = LocalSpacing.current.large)
+        )
         if (message != null) {
             Text(
                 text = message,