feat(map): VUCC default chip, own-grid bold at all zooms, roamed-grid blue stripes

- Grid mode now opens with the VUCC award chip selected by default (re-asserted
  on every grid-mode entry; the user's in-mode chip choice is preserved).
- The station's own grid outline is now drawn at every zoom level: 2-char field
  border below the sub-square zoom, 4-char square border above it (was hidden
  at the default entry zoom), stroke widened to 6f.
- Grids the account operated from (LoTW <MY_GRIDSQUARE>, satellite QSOs only)
  are covered with GridMaster-style blue 45° zebra stripes. The stripe paint is
  fully opaque so a worked+roamed cell shows pure-blue stripes with green
  between them — the two colors never alpha-blend into a teal/green mix.
- LoTW sync now parses and persists the roamed set (LoTWResult.Success +
  SettingsRepo key 'roamedGrids'), plumbed through MapState/MapViewModel into
  MaidenheadGridOverlay. Unit tests cover MY_GRIDSQUARE parsing (SAT-only,
  GRIDSQUARE non-leak, 4-char truncation).

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/LoTWRepository.kt

@@ -47,8 +47,11 @@ class LoTWRepository : ILoTWRepository {
     override suspend fun fetchConfirmedGrids(callsign: String, password: String): LoTWResult =
         withContext(Dispatchers.IO) {
             fetchReportBody(callsign, password).fold(
-                onSuccess = { body -> parseBoth(body)?.let { LoTWResult.Success(it.first, it.second) }
-                    ?: LoTWResult.RateLimited },
+                onSuccess = { body ->
+                    parseBoth(body)?.let { (grids, _, roamed) ->
+                        LoTWResult.Success(grids, emptyMap(), roamed)
+                    } ?: LoTWResult.RateLimited
+                },
                 onFailure = { toResult(it) }
             )
         }
@@ -58,8 +61,11 @@ class LoTWRepository : ILoTWRepository {
         password: String
     ): LoTWResult = withContext(Dispatchers.IO) {
         fetchReportBody(callsign, password).fold(
-            onSuccess = { body -> parseBoth(body)?.let { LoTWResult.Success(it.first, it.second) }
-                ?: LoTWResult.RateLimited },
+            onSuccess = { body ->
+                parseBoth(body)?.let { (grids, qsos, roamed) ->
+                    LoTWResult.Success(grids, qsos, roamed)
+                } ?: LoTWResult.RateLimited
+            },
             onFailure = { toResult(it) }
         )
     }
@@ -71,11 +77,14 @@ class LoTWRepository : ILoTWRepository {
         else -> LoTWResult.NetworkError(e.message ?: e.javaClass.simpleName)
     }
 
-    /** Single report fetch feeding both the grid set and the per-QSO detail. */
-    private fun parseBoth(body: String): Pair<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>>? {
+    /** Single report fetch feeding the grid set, the per-QSO detail and the roamed set. */
+    private fun parseBoth(
+        body: String
+    ): Triple<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>, Set<String>>? {
         val grids = parseConfirmedGrids(body) ?: return null
         val qsos = parseConfirmedGridQsos(body) ?: return null
-        return grids to qsos
+        val roamed = parseRoamedGrids(body) ?: return null
+        return Triple(grids, qsos, roamed)
     }
 
     private fun fetchReportBody(callsign: String, password: String): Result<String> {
@@ -294,6 +303,39 @@ class LoTWRepository : ILoTWRepository {
         return grids
     }
 
+    /**
+     * Distinct 4-char gridsquares the account itself operated from, taken from
+     * ADIF <MY_GRIDSQUARE> of satellite QSO records only. This is the
+     * "roamed / activated" set shown as blue stripes on the map — the grids
+     * where the operator's own station was located during confirmed QSOs (a
+     * rover may log several distinct grids; the home grid is included too).
+     * Returns null when the body is not an ADIF report (mirrors the other parsers).
+     */
+    internal fun parseRoamedGrids(body: String): Set<String>? {
+        if (!body.contains("<eoh>", ignoreCase = true)) return null
+        val grids = mutableSetOf<String>()
+        var propMode: String? = null
+        for (raw in body.lineSequence()) {
+            val line = raw.trim()
+            when {
+                line.equals("<EOR>", ignoreCase = true) -> propMode = null
+                line.startsWith("<PROP_MODE:") -> {
+                    propMode = line.substringAfter('>').substringBefore("E<").trim().uppercase()
+                }
+                line.startsWith("<MY_GRIDSQUARE:") -> {
+                    // MY_GRIDSQUARE must not be mistaken for GRIDSQUARE (the
+                    // opposite station's grid) — only own-station grids count.
+                    if (propMode == "SAT") {
+                        val value = line.substringAfter('>').substringBefore("E<")
+                        val field = value.trim().uppercase()
+                        if (field.length >= 4) grids.add(field.take(4))
+                    }
+                }
+            }
+        }
+        return grids
+    }
+
     private companion object {
         const val BASE_URL = "https://lotw.arrl.org/lotwuser/lotwreport.adi"
     }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SettingsRepo.kt

@@ -239,6 +239,29 @@ class SettingsRepo(
         preferences.edit { putString(keyWorkedGridQsos, root.toString()) }
     }
 
+    // Distinct 4-char gridsquares the account operated from (LoTW <MY_GRIDSQUARE>,
+    // satellite QSOs only). Stored as a JSONArray like workedGrids.
+    private val keyRoamedGrids = "roamedGrids"
+
+    override fun getRoamedGrids(): Set<String> {
+        val json = preferences.getString(keyRoamedGrids, null).orEmpty()
+        if (json.isBlank()) return emptySet()
+        return try {
+            val array = org.json.JSONArray(json)
+            (0 until array.length()).mapNotNull { i ->
+                array.optString(i).takeIf { it.isNotBlank() }
+            }.toSet()
+        } catch (_: Exception) {
+            emptySet()
+        }
+    }
+
+    override fun setRoamedGrids(grids: Set<String>) {
+        val array = org.json.JSONArray()
+        grids.sorted().forEach { array.put(it) }
+        preferences.edit { putString(keyRoamedGrids, array.toString()) }
+    }
+
     // LoTW credentials (stored locally on the device only)
     private val keyLoTWCall = "lotwCallsign"
     private val keyLoTWPass = "lotwPassword"

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepoTest.kt

@@ -296,6 +296,14 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     override fun getWorkedGridQsos(): Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>> = emptyMap()
 
     override fun setWorkedGridQsos(qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>) = Unit
+
+    override fun getRoamedGrids(): Set<String> = emptySet()
+
+    private val roamedGrids = MutableStateFlow(emptySet<String>())
+
+    override fun setRoamedGrids(grids: Set<String>) {
+        roamedGrids.value = grids
+    }
 }
 
 private fun defaultDataSourcesSettings(): DataSourcesSettings {

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/LoTWRepositoryTest.kt

@@ -130,6 +130,46 @@ class LoTWRepositoryTest {
 
     // endregion
 
+    // region parseRoamedGrids (MY_GRIDSQUARE = grids the account operated from)
+
+    @Test
+    fun parseRoamedGridsCollectsOwnStationGrids() {
+        // Satellite QSOs carry MY_GRIDSQUARE = the grid the account itself
+        // operated from (the "roamed/activated" set shown as blue stripes).
+        val qso1 = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260820\n<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n" +
+            "<MY_GRIDSQUARE:4>OL62\n<GRIDSQUARE:4>PM95\n<EOR>\n"
+        val qso2 = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260901\n<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n" +
+            "<MY_GRIDSQUARE:4>OL72\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        assertEquals(setOf("OL62", "OL72"), repo.parseRoamedGrids(report(qso1, qso2)))
+    }
+
+    @Test
+    fun parseRoamedGridsIgnoresGroundQsos() {
+        val ground = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260821\n<MY_GRIDSQUARE:4>OL72\n<EOR>\n"
+        assertEquals(emptySet<String>(), repo.parseRoamedGrids(report(ground)))
+    }
+
+    @Test
+    fun parseRoamedGridsDoesNotConfuseGridsquareWithMyGridsquare() {
+        // GRIDSQUARE (opposite station's grid) must never leak into the roamed set.
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n<MY_GRIDSQUARE:4>OL62\n" +
+            "<GRIDSQUARE:6>OM60IL\n<EOR>\n"
+        assertEquals(setOf("OL62"), repo.parseRoamedGrids(report(qso)))
+    }
+
+    @Test
+    fun parseRoamedGridsTruncatesSixCharToFour() {
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n<MY_GRIDSQUARE:6>OL62AA\n<EOR>\n"
+        assertEquals(setOf("OL62"), repo.parseRoamedGrids(report(qso)))
+    }
+
+    @Test
+    fun parseRoamedGridsRejectsBodyWithoutEoh() {
+        assertNull(repo.parseRoamedGrids("<HTML>Username/password incorrect</HTML>"))
+    }
+
+    // endregion
+
     // region failure classification (fetchReportBody -> LoTWResult mapping)
 
     @Test