feat(lotw): 漫游核验改用「当前定位 vs 证书台址」，移除记录网格核对

- 新增 LoTWPositionWarning + positionWarning(currentGrid, stationGrids)：当前定位网格不在
  证书台址网格集内 → 提示（4 位归一；任一侧缺失不报）
- ISettingsRepo.getCurrentGrid()：只读取「≤24h 系统最后已知定位」与「存储台址」中较新者，
  不写任何设置（避开 setStationPosition 的写副作用）
- 上传前核对弹窗（雷达 / 日志本两入口）改由 VM 在 prepare 后计算；雷达记录页新增提示行
  （stationMismatch，点击=跳转改台址并预填当前格）
- 移除旧「记录 vs 台址」核对：uploadGridWarning / LoTWGridWarning / preview.gridWarning 及
  相关 UI / 字符串全删；LoTWPositionWarningDialog 重命名替代 LoTWGridWarningDialog
- 测试：LoTWPositionWarningTest ×5 替代 LoTWGridWarningTest；domain 171 / data 116 / mutual 28 全绿

core/data/src/main/java/com/rtbishop/look4sat/core/data/lotw/LoTWUploadRepository.kt

@@ -30,7 +30,6 @@ import com.rtbishop.look4sat.core.domain.repository.LoTWStation
 import com.rtbishop.look4sat.core.domain.repository.LoTWStationMeta
 import com.rtbishop.look4sat.core.domain.repository.LoTWUploadAudit
 import com.rtbishop.look4sat.core.domain.repository.LoTWUploadPreview
-import com.rtbishop.look4sat.core.domain.repository.uploadGridWarning
 import com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ensureActive
@@ -287,9 +286,6 @@ class LoTWUploadRepository internal constructor(
                 signing.location["MY_VUCC_GRIDS"]?.split(',')
                     ?.map(String::trim)?.filter(String::isNotBlank)?.let(::addAll)
             }.distinct()
-            // Roaming guard: flag records whose own grids fall outside the station grids this
-            // batch would be signed with (a station location never updated while roaming).
-            val gridWarning = uploadGridWarning(contacts.map { it.record }, locationGrids)
             val preview = LoTWUploadPreview(
                 UUID.randomUUID().toString(), signing.key.info.callsign, signing.key.info.dxcc, signing.location.getValue("GRIDSQUARE"),
                 contacts.size, skipped,
@@ -302,7 +298,6 @@ class LoTWUploadRepository internal constructor(
                 duplicates,
                 contacts.map { it.record.id },
                 locationGrids,
-                gridWarning,
                 resubmit
             )
             if (contacts.isNotEmpty()) pending = Pending(

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

@@ -468,6 +468,34 @@ class SettingsRepo(
         return true
     }
 
+    override fun getCurrentGrid(): String? {
+        val station = _stationPosition.value
+        val now = System.currentTimeMillis()
+        // Only trust a location fix that is both recent (≤ 24 h) and newer than the stored
+        // station, so a stale fix can never override a position the operator just set.
+        val fix = lastKnownGridFix()?.takeIf { now - it.second <= 24 * 3_600_000L }
+        val chosen = if (fix != null && fix.second >= station.timestamp) fix.first else station.qthLocator
+        return chosen.takeIf(String::isNotBlank)
+    }
+
+    /** Last known GPS/NETWORK fix converted to a locator; read-only, null without permission. */
+    private fun lastKnownGridFix(): Pair<String, Long>? {
+        return try {
+            val provider = when {
+                LocationManagerCompat.hasProvider(locationManager, providerGps) -> providerGps
+                LocationManagerCompat.hasProvider(locationManager, providerNet) -> providerNet
+                else -> return null
+            }
+            val location = locationManager.getLastKnownLocation(provider) ?: return null
+            val locator = positionToQth(location.latitude, location.longitude) ?: return null
+            locator to location.time
+        } catch (_: SecurityException) {
+            null
+        } catch (_: IllegalArgumentException) {
+            null
+        }
+    }
+
     private fun getStationPosition(): GeoPos {
         val latitude = (preferences.getString(keyStationLatitude, null) ?: "0.0").toDouble()
         val longitude = (preferences.getString(keyStationLongitude, null) ?: "0.0").toDouble()

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

@@ -271,6 +271,8 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
 
     override fun setStationPosition(locator: String): Boolean = true
 
+    override fun getCurrentGrid(): String? = null
+
     override fun getSatelliteTypesIds(types: List<String>): List<Int> = emptyList()
 
     override fun setSatelliteTypeIds(type: String, ids: List<Int>) {

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

@@ -330,6 +330,7 @@ private class FakeSettingsRepoForSearch : ISettingsRepo {
     override fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean = true
     override fun setStationPosition(): Boolean = true
     override fun setStationPosition(locator: String): Boolean = true
+    override fun getCurrentGrid(): String? = null
     override fun getSatelliteTypesIds(types: List<String>): List<Int> =
         types.flatMap { typeIds[it].orEmpty() }.distinct()
 

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ILoTWUploadRepository.kt

@@ -102,20 +102,17 @@ data class LoTWUploadPreview(
      *  2 on a line, 4 on a corner). Stamped onto the uploaded records so the logbook
      *  can show which gridsquares the QSO went out under. */
     val grids: List<String> = emptyList(),
-    /** Records whose own grids fall outside this batch's station location — the fingerprint
-     *  of uploading while roaming with a stale station location. Null when all covered. */
-    val gridWarning: LoTWGridWarning? = null,
     /** True when this batch is a resubmit: already-uploaded/confirmed records were allowed
      *  through so the corrected station location reaches LoTW as an update of the contact. */
     val resubmit: Boolean = false
 )
 
-/** Pre-upload grid audit result: [count] records carry own grids outside the station grids. */
-data class LoTWGridWarning(
-    val count: Int,
-    /** Distinct own grids of the affected records (normalized, 4 characters). */
-    val recordGrids: List<String>,
-    /** Distinct station-location grids this batch would be signed with. */
+/** Pre-upload location check: the freshest known position grid is not covered by the
+ *  station grids an upload would be signed with. */
+data class LoTWPositionWarning(
+    /** Normalized 4-character grid of the freshest known position. */
+    val currentGrid: String,
+    /** Distinct station-location grids the upload would be signed with. */
     val stationGrids: List<String>
 )
 
@@ -154,30 +151,19 @@ enum class LoTWProblem {
 }
 
 /**
- * Records whose own grids (the set a previous upload stamped, else the logged grid) do not
- * appear at all in the station-location grids an upload goes out under — the signature of
- * uploading while roaming with a station location that was never updated. Records without
- * any grid are not flagged, and a partially covered set (boundary operations) is not
- * flagged either: only a fully disjoint pair, which is always a mistake, warns.
+ * Roaming check run before upload: warns when the operator's freshest known position
+ * (see [ISettingsRepo.getCurrentGrid]) lies outside every grid of the station location the
+ * batch would be signed with — the signature of operating while roaming with a station
+ * location that was never updated. An unknown position, missing station grids, or a covered
+ * position (boundary operations included) produce no warning.
  */
-fun uploadGridWarning(records: List<QsoRecord>, stationGrids: List<String>): LoTWGridWarning? {
+fun positionWarning(currentGrid: String?, stationGrids: List<String>): LoTWPositionWarning? {
+    val current = currentGrid?.grid4() ?: return null
     val station = stationGrids.mapNotNull { it.grid4() }.toSet()
     if (station.isEmpty()) return null
-    val affected = records.filter { record ->
-        val own = record.ownGrids()
-        own.isNotEmpty() && own.none { it in station }
-    }
-    if (affected.isEmpty()) return null
-    return LoTWGridWarning(
-        affected.size,
-        affected.flatMap { it.ownGrids() }.distinct().sorted(),
-        station.sorted()
-    )
+    if (current in station) return null
+    return LoTWPositionWarning(current, station.sorted())
 }
 
-/** The grid set a previous upload stamped onto the record, else the grid it was logged under. */
-private fun QsoRecord.ownGrids(): Set<String> =
-    (vuccGrids.ifEmpty { listOf(myGrid) }).mapNotNull { it.grid4() }.toSet()
-
 /** Normalized 4-character grid, null when the value is not a usable grid. */
 private fun String.grid4(): String? = trim().uppercase(Locale.US).take(4).takeIf { it.length >= 4 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISettingsRepo.kt

@@ -48,6 +48,12 @@ interface ISettingsRepo {
     fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean
     fun setStationPosition(): Boolean
     fun setStationPosition(locator: String): Boolean
+    /**
+     * Freshest known position grid for the roaming check, read-only: the newer of a fresh
+     * (≤ 24 h) system location fix and the stored station position. Null only when neither
+     * yields a usable locator. Never writes the station position.
+     */
+    fun getCurrentGrid(): String?
     //endregion
 
     //region # Database update settings

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/repository/LoTWGridSyncTest.kt

@@ -276,6 +276,7 @@ class LoTWGridSyncTest {
         override fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean = TODO()
         override fun setStationPosition(): Boolean = TODO()
         override fun setStationPosition(locator: String): Boolean = TODO()
+        override fun getCurrentGrid(): String? = TODO()
         override fun getSatelliteTypesIds(types: List<String>): List<Int> = TODO()
         override fun setSatelliteTypeIds(type: String, ids: List<Int>) = TODO()
         override fun updateDatabaseState(state: DatabaseState) = TODO()

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/repository/LoTWGridWarningTest.kt

@@ -1,77 +0,0 @@
-/*
- * Look4Sat. Amateur radio satellite tracker and pass predictor.
- * Copyright (C) 2019-2026 Arty Bishop and contributors.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- */
-package com.rtbishop.look4sat.core.domain.repository
-
-import com.rtbishop.look4sat.core.domain.logbook.QsoRecord
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertNull
-import org.junit.Test
-
-class LoTWGridWarningTest {
-
-    private fun record(myGrid: String, vuccGrids: List<String> = emptyList()) = QsoRecord(
-        startUtcMillis = 1_700_000_000_000L,
-        theirCallsign = "BG5JSB",
-        myCallsign = "BA7OPF",
-        myGrid = myGrid,
-        vuccGrids = vuccGrids,
-        mode = "FM",
-        satelliteName = "SO-50",
-        propagationMode = "SAT"
-    )
-
-    @Test
-    fun matchingGridsProduceNoWarning() {
-        assertNull(uploadGridWarning(listOf(record("OM91")), listOf("OM91")))
-    }
-
-    @Test
-    fun recordsLoggedOutsideTheStationAreCounted() {
-        val warning = uploadGridWarning(
-            listOf(record("OM91"), record("OM91"), record("OL62")),
-            listOf("OL62")
-        )
-        assertEquals(2, warning?.count)
-        assertEquals(listOf("OM91"), warning?.recordGrids)
-        assertEquals(listOf("OL62"), warning?.stationGrids)
-    }
-
-    @Test
-    fun boundaryStationCoversItsRecords() {
-        val warning = uploadGridWarning(
-            listOf(record("OL62", listOf("OL61", "OL62"))),
-            listOf("OL61", "OL62", "OM60", "OM61")
-        )
-        assertNull(warning)
-    }
-
-    @Test
-    fun partialOverlapIsNotFlagged() {
-        // The record's set touches the station set — a boundary-bookkeeping difference,
-        // not the roaming signature.
-        assertNull(uploadGridWarning(listOf(record("OL62", listOf("OL62", "OL63"))), listOf("OL62")))
-    }
-
-    @Test
-    fun recordsWithoutGridsOrStationAreNotFlagged() {
-        assertNull(uploadGridWarning(listOf(record("")), listOf("OL62")))
-        assertNull(uploadGridWarning(listOf(record("OM91")), emptyList()))
-    }
-
-    @Test
-    fun stampedGridSetIsComparedInsteadOfTheLoggedGrid() {
-        val warning = uploadGridWarning(
-            listOf(record("OL62", listOf("OM91", "OM92", "PM01", "PM02"))),
-            listOf("OL62")
-        )
-        assertEquals(1, warning?.count)
-        assertEquals(listOf("OM91", "OM92", "PM01", "PM02"), warning?.recordGrids)
-    }
-}

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/repository/LoTWPositionWarningTest.kt

@@ -0,0 +1,56 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.core.domain.repository
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class LoTWPositionWarningTest {
+
+    @Test
+    fun coveredPositionProducesNoWarning() {
+        assertNull(positionWarning("OL62aa", listOf("OL62")))
+    }
+
+    @Test
+    fun positionInsideAnyStationGridIsCovered() {
+        assertNull(positionWarning("OL61", listOf("OL61", "OL62", "OM60", "OM61")))
+    }
+
+    @Test
+    fun positionOutsideTheStationWarns() {
+        val warning = positionWarning("om91", listOf("OL62"))
+        assertEquals("OM91", warning?.currentGrid)
+        assertEquals(listOf("OL62"), warning?.stationGrids)
+    }
+
+    @Test
+    fun stationGridsAreNormalizedForComparison() {
+        assertNull(positionWarning("OL62", listOf("ol62aa")))
+        assertNull(positionWarning("ol62", listOf("OL62")))
+    }
+
+    @Test
+    fun unknownPositionOrStationProducesNoWarning() {
+        assertNull(positionWarning(null, listOf("OL62")))
+        assertNull(positionWarning("", listOf("OL62")))
+        assertNull(positionWarning("OM91", emptyList()))
+        assertNull(positionWarning("OM91", listOf("")))
+    }
+}

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/LoTWPositionWarningDialog.kt

@@ -23,17 +23,17 @@ import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.sp
-import com.rtbishop.look4sat.core.domain.repository.LoTWGridWarning
+import com.rtbishop.look4sat.core.domain.repository.LoTWPositionWarning
 
 /**
- * Pre-upload grid check: the prepared batch holds records whose own grids fall outside the
- * station-location grids they would be signed with — the fingerprint of uploading while
+ * Pre-upload position check: the operator's current position grid falls outside the station
+ * location the prepared batch would be signed with — the fingerprint of operating while
  * roaming with a station location that was never updated. The operator either jumps to the
  * station location to fix it, or ignores the warning and proceeds to the normal preview.
  */
 @Composable
-fun LoTWGridWarningDialog(
-    warning: LoTWGridWarning,
+fun LoTWPositionWarningDialog(
+    warning: LoTWPositionWarning,
     onFixStation: () -> Unit,
     onIgnore: () -> Unit
 ) {
@@ -46,8 +46,7 @@ fun LoTWGridWarningDialog(
             Text(
                 text = stringResource(
                     R.string.lotw_upload_grid_mismatch,
-                    warning.count,
-                    gridsLabel(warning.recordGrids),
+                    warning.currentGrid,
                     gridsLabel(warning.stationGrids)
                 ),
                 fontSize = 14.sp

core/presentation/src/main/res/values-zh/strings.xml

@@ -204,7 +204,8 @@
     <string name="lotw_upload_grid_title">上传前核对</string>
     <string name="lotw_upload_grid_fix">修改台址</string>
     <string name="lotw_upload_grid_ignore">忽略</string>
-    <string name="lotw_upload_grid_mismatch">有 %1$d 条记录的自己的网格不在上传台址内（记录：%2$s；台址：%3$s）——请确认台址是通联时实际所在的网格。</string>
+    <string name="lotw_upload_grid_mismatch">当前定位 %1$s 不在证书台址网格 %2$s 内——如果正在此处操作，请先更新台址再上传。</string>
+    <string name="lotw_upload_pos_hint">当前定位 %1$s 不在证书台址网格 %2$s 内 · 点此更新</string>
     <string name="prefs_lotw_upload_title">LoTW 上传证书</string>
     <string name="prefs_lotw_upload_configured">证书已导入 · 台址网格 %1$s</string>
     <string name="prefs_lotw_upload_not_configured">未配置 — 导入 TrustedQSL 证书后即可上传通联</string>

core/presentation/src/main/res/values/strings.xml

@@ -233,7 +233,8 @@
     <string name="lotw_upload_grid_title">Upload check</string>
     <string name="lotw_upload_grid_fix">Fix station location</string>
     <string name="lotw_upload_grid_ignore">Ignore</string>
-    <string name="lotw_upload_grid_mismatch">%1$d record(s) log a grid outside the upload station location (records: %2$s; station: %3$s). Verify the station location is where you actually operated.</string>
+    <string name="lotw_upload_grid_mismatch">Current position %1$s is outside the certificate station grids %2$s — if you are operating here, update the station location before uploading.</string>
+    <string name="lotw_upload_pos_hint">Current position %1$s is outside the station grids %2$s — tap to update</string>
     <string name="prefs_lotw_upload_title">LoTW upload certificate</string>
     <string name="prefs_lotw_upload_configured">Certificate imported · station grid %1$s</string>
     <string name="prefs_lotw_upload_not_configured">Not configured — import your TrustedQSL certificate to upload QSOs</string>

feature/mutual/src/test/java/com/rtbishop/look4sat/feature/mutual/Fakes.kt

@@ -115,6 +115,7 @@ class FakeSettingsRepo(
     override fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean = TODO()
     override fun setStationPosition(): Boolean = TODO()
     override fun setStationPosition(locator: String): Boolean = TODO()
+    override fun getCurrentGrid(): String? = TODO()
     override fun getSatelliteTypesIds(types: List<String>): List<Int> = TODO()
     override fun setSatelliteTypeIds(type: String, ids: List<Int>) = TODO()
     override fun updateDatabaseState(state: DatabaseState) = TODO()

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/LogPage.kt

@@ -16,6 +16,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
@@ -66,7 +67,7 @@ import com.rtbishop.look4sat.core.presentation.SheetDialogTitle
 import com.rtbishop.look4sat.core.presentation.sheetDialogContainerColor
 import com.rtbishop.look4sat.core.presentation.sheetDialogShape
 import com.rtbishop.look4sat.core.presentation.gridsLabel
-import com.rtbishop.look4sat.core.presentation.LoTWGridWarningDialog
+import com.rtbishop.look4sat.core.presentation.LoTWPositionWarningDialog
 
 @Composable
 fun LogPage(
@@ -105,6 +106,12 @@ fun LogPage(
         if (catnum != 0) logViewModel.selectSatellite(catnum)
     }
 
+    // Refresh the roaming hint whenever the page re-enters composition (e.g. returning
+    // from the station-location fix jump).
+    LaunchedEffect(Unit) {
+        logViewModel.refreshPositionHint()
+    }
+
     val selectedTxHz = remember(selectedRadio) { selectedRadio?.uplinkHz() }
     val selectedRxHz = remember(selectedRadio) { selectedRadio?.downlinkHz() }
     val repeaterTxHz = voiceRepeater?.uplinkHz()
@@ -152,6 +159,20 @@ fun LogPage(
                 enabled = logUiState.callsignInput.isNotBlank() && satName.isNotBlank()
             ) { Text("Log") }
         }
+        logUiState.stationMismatch?.let { mismatch ->
+            Text(
+                text = "⚠ " + stringResource(
+                    R.string.lotw_upload_pos_hint,
+                    mismatch.currentGrid,
+                    gridsLabel(mismatch.stationGrids)
+                ),
+                fontSize = 12.sp,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable { onFixGrid(listOf(mismatch.currentGrid)) }
+            )
+        }
         if (isLinear) {
             Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
                 listOf("CW", "SSB", "FT4").forEach { candidate ->
@@ -222,19 +243,19 @@ fun LogPage(
         )
     }
 
-    logUiState.uploadGridWarning?.let { warning ->
-        LoTWGridWarningDialog(
+    logUiState.uploadPositionWarning?.let { warning ->
+        LoTWPositionWarningDialog(
             warning = warning,
             onFixStation = {
                 logViewModel.abandonForGridFix()
-                onFixGrid(warning.recordGrids)
+                onFixGrid(listOf(warning.currentGrid))
             },
-            onIgnore = logViewModel::ignoreGridWarning
+            onIgnore = logViewModel::ignorePositionWarning
         )
     }
 
-    // The preview only opens once the grid check is out of the way.
-    if (logUiState.uploadGridWarning == null) {
+    // The preview only opens once the position check is out of the way.
+    if (logUiState.uploadPositionWarning == null) {
         logUiState.preview?.let { preview ->
             UploadPreviewDialog(
                 preview = preview,

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/LogViewModel.kt

@@ -25,9 +25,10 @@ import com.rtbishop.look4sat.core.domain.repository.ILoTWUploadRepository
 import com.rtbishop.look4sat.core.domain.repository.IMainContainer
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
 import com.rtbishop.look4sat.core.domain.repository.LoTWOperationException
+import com.rtbishop.look4sat.core.domain.repository.LoTWPositionWarning
 import com.rtbishop.look4sat.core.domain.repository.LoTWUploadPreview
-import com.rtbishop.look4sat.core.domain.repository.LoTWGridWarning
 import com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult
+import com.rtbishop.look4sat.core.domain.repository.positionWarning
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -67,9 +68,12 @@ data class LogUiState(
     /** ARRL satellite names (config.tq6) — the only names a record may be signed with. */
     val satelliteCatalog: List<String> = emptyList(),
     val preview: LoTWUploadPreview? = null,
-    /** Roaming guard: the prepared batch holds records whose own grids fall outside the
-     *  station-location grids — shown as a dialog before the preview opens. */
-    val uploadGridWarning: LoTWGridWarning? = null,
+    /** Roaming guard: the current position grid is outside the station grids the prepared
+     *  batch would be signed with — shown as a dialog before the preview opens. */
+    val uploadPositionWarning: LoTWPositionWarning? = null,
+    /** Roaming hint on the log page: current position grid outside the station grids
+     *  (null when covered or unknown). Tapping it jumps to the station location. */
+    val stationMismatch: LoTWPositionWarning? = null,
     /** User-facing upload / record message ("" when none). */
     val message: String = "",
     val postText: String? = null,
@@ -108,6 +112,10 @@ class LogViewModel(
                 )
             }
         }
+        // The roaming hint tracks the freshest position data: refresh on init and every fix.
+        viewModelScope.launch {
+            settingsRepo.stationPosition.collect { refreshPositionHintNow() }
+        }
     }
 
     fun updateCallsign(value: String) =
@@ -268,7 +276,13 @@ class LogViewModel(
                 // Only the records that actually made it into the TQ8 may be
                 // marked uploaded later — never the whole candidate list.
                 lastUploadedIds = preview.submittedIds
-                _uiState.update { it.copy(busy = false, preview = preview, uploadGridWarning = preview.gridWarning) }
+                _uiState.update {
+                    it.copy(
+                        busy = false,
+                        preview = preview,
+                        uploadPositionWarning = positionWarning(settingsRepo.getCurrentGrid(), preview.grids)
+                    )
+                }
             } catch (e: LoTWOperationException) {
                 _uiState.update { it.copy(busy = false, message = "Upload unavailable: ${e.reason}") }
             } catch (_: Exception) {
@@ -300,14 +314,32 @@ class LogViewModel(
 
     fun dismissPreview() = _uiState.update { it.copy(preview = null) }
 
-    /** Operator chose "ignore" on the grid check: keep the prepared preview. */
-    fun ignoreGridWarning() = _uiState.update { it.copy(uploadGridWarning = null) }
+    /** Operator chose "ignore" on the position check: keep the prepared preview. */
+    fun ignorePositionWarning() = _uiState.update { it.copy(uploadPositionWarning = null) }
 
     /** Operator chose to fix the station grid first: drop the prepared preview and leave. */
     fun abandonForGridFix() {
         lotwUploadRepository.discardPreview()
         lastUploadedIds = emptyList()
-        _uiState.update { it.copy(uploadGridWarning = null, preview = null) }
+        _uiState.update { it.copy(uploadPositionWarning = null, preview = null) }
+    }
+
+    /** Recompute the log-page roaming hint from the freshest station/position data. */
+    fun refreshPositionHint() = viewModelScope.launch { refreshPositionHintNow() }
+
+    private suspend fun refreshPositionHintNow() {
+        val station = runCatching { lotwUploadRepository.station() }.getOrNull()
+        if (station == null) {
+            _uiState.update { it.copy(stationMismatch = null) }
+            return
+        }
+        val grids = station.grid.split(',').map(String::trim).filter(String::isNotBlank)
+        _uiState.update {
+            it.copy(
+                stationMismatch = positionWarning(settingsRepo.getCurrentGrid(), grids),
+                stationGrid = station.grid
+            )
+        }
     }
 
     fun clearMessage() = _uiState.update { it.copy(message = "") }

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

@@ -53,7 +53,7 @@ import com.rtbishop.look4sat.core.presentation.SheetDialogTitle
 import com.rtbishop.look4sat.core.presentation.sheetDialogContainerColor
 import com.rtbishop.look4sat.core.presentation.sheetDialogShape
 import com.rtbishop.look4sat.core.presentation.gridsLabel
-import com.rtbishop.look4sat.core.presentation.LoTWGridWarningDialog
+import com.rtbishop.look4sat.core.presentation.LoTWPositionWarningDialog
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.SharedDialog
 import com.rtbishop.look4sat.core.presentation.SwipeController
@@ -89,7 +89,7 @@ fun LogbookDialog(
     uploadBusy: Boolean,
     uploadMessage: String,
     preview: com.rtbishop.look4sat.core.domain.repository.LoTWUploadPreview?,
-    gridWarning: com.rtbishop.look4sat.core.domain.repository.LoTWGridWarning? = null,
+    positionWarning: com.rtbishop.look4sat.core.domain.repository.LoTWPositionWarning? = null,
     onDismiss: () -> Unit,
     onDelete: (Long) -> Unit,
     onEdit: (QsoRecord) -> Unit,
@@ -97,7 +97,7 @@ fun LogbookDialog(
     onConfirmUpload: () -> Unit,
     onDismissPreview: () -> Unit,
     onDismissMessage: () -> Unit,
-    onIgnoreGridWarning: () -> Unit = {},
+    onIgnorePositionWarning: () -> Unit = {},
     onFixGrid: (List<String>) -> Unit = {},
     selectionMode: Boolean = false,
     selectedIds: Set<Long> = emptySet(),
@@ -169,13 +169,13 @@ fun LogbookDialog(
         }
     }
 
-    if (gridWarning != null) {
-        // Roaming guard: the batch would be signed under a station grid it was not operated
-        // from — confirm the station location before the preview opens.
-        LoTWGridWarningDialog(
-            warning = gridWarning,
-            onFixStation = { onFixGrid(gridWarning.recordGrids) },
-            onIgnore = onIgnoreGridWarning
+    if (positionWarning != null) {
+        // Roaming guard: the current position sits outside the station location this batch
+        // would be signed with — confirm the station location before the preview opens.
+        LoTWPositionWarningDialog(
+            warning = positionWarning,
+            onFixStation = { onFixGrid(listOf(positionWarning.currentGrid)) },
+            onIgnore = onIgnorePositionWarning
         )
     } else if (preview != null) {
         LogbookUploadPreviewDialog(

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

@@ -292,7 +292,7 @@ private fun SettingsScreen(
             uploadBusy = uiState.logbookUploadBusy,
             uploadMessage = uiState.logbookUploadMessage,
             preview = uiState.logbookPreview,
-            gridWarning = uiState.logbookGridWarning,
+            positionWarning = uiState.logbookPositionWarning,
             onDismiss = {
                 // Leaving the logbook resets the resubmit selection: re-entering starts
                 // clean — the operator long-presses again to pick records.
@@ -305,7 +305,7 @@ private fun SettingsScreen(
             onConfirmUpload = { onAction(SettingsAction.ConfirmLogbookUpload) },
             onDismissPreview = { onAction(SettingsAction.DismissLogbookPreview) },
             onDismissMessage = { onAction(SettingsAction.ClearLogbookMessage) },
-            onIgnoreGridWarning = { onAction(SettingsAction.IgnoreLogbookGridWarning) },
+            onIgnorePositionWarning = { onAction(SettingsAction.IgnoreLogbookPositionWarning) },
             onFixGrid = { grids ->
                 onAction(SettingsAction.AbandonLogbookForGridFix)
                 onAction(SettingsAction.ExitLogbookSelection)

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

@@ -85,9 +85,9 @@ data class SettingsState(
     val lotwUploadErrorDetail: String = "",
     /** One-click logbook upload: prepared preview awaiting confirmation. */
     val logbookPreview: com.rtbishop.look4sat.core.domain.repository.LoTWUploadPreview? = null,
-    /** Roaming guard: the prepared batch holds records whose own grids fall outside the
-     *  station-location grids — shown as a dialog before the preview opens. */
-    val logbookGridWarning: com.rtbishop.look4sat.core.domain.repository.LoTWGridWarning? = null,
+    /** Roaming guard: the current position grid is outside the station grids the prepared
+     *  batch would be signed with — shown as a dialog before the preview opens. */
+    val logbookPositionWarning: com.rtbishop.look4sat.core.domain.repository.LoTWPositionWarning? = null,
     val logbookUploadBusy: Boolean = false,
     /** User-facing upload message shown inside the logbook dialog ("" = none). */
     val logbookUploadMessage: String = "",
@@ -167,8 +167,8 @@ sealed interface SettingsAction {
     data object PrepareLogbookUpload : SettingsAction
     data object ConfirmLogbookUpload : SettingsAction
     data object DismissLogbookPreview : SettingsAction
-    /** The operator acknowledged the grid mismatch and wants to upload anyway. */
-    data object IgnoreLogbookGridWarning : SettingsAction
+    /** The operator acknowledged the position mismatch and wants to upload anyway. */
+    data object IgnoreLogbookPositionWarning : SettingsAction
     /** The operator chose to fix the station location first; the preview is discarded. */
     data object AbandonLogbookForGridFix : SettingsAction
     /** Long-press on a row: enter selection mode with that record checked. */

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

@@ -34,6 +34,7 @@ import com.rtbishop.look4sat.core.domain.repository.applyLoTWGridResult
 import com.rtbishop.look4sat.core.domain.repository.lotwCursorApi
 import com.rtbishop.look4sat.core.domain.repository.lotwCursorEpochMs
 import com.rtbishop.look4sat.core.domain.repository.resolveLoTWSyncMode
+import com.rtbishop.look4sat.core.domain.repository.positionWarning
 import com.rtbishop.look4sat.core.domain.repository.IWavelogRepository
 import com.rtbishop.look4sat.core.domain.usecase.IShowToast
 import com.rtbishop.look4sat.core.domain.utility.VersionComparator
@@ -235,7 +236,7 @@ class SettingsViewModel(
             SettingsAction.PrepareLogbookUpload -> prepareLogbookUpload()
             SettingsAction.ConfirmLogbookUpload -> confirmLogbookUpload()
             SettingsAction.DismissLogbookPreview -> dismissLogbookPreview()
-            SettingsAction.IgnoreLogbookGridWarning -> ignoreLogbookGridWarning()
+            SettingsAction.IgnoreLogbookPositionWarning -> ignoreLogbookPositionWarning()
             SettingsAction.AbandonLogbookForGridFix -> abandonLogbookForGridFix()
             is SettingsAction.StartLogbookSelection -> startLogbookSelection(action.id)
             is SettingsAction.ToggleLogbookSelection -> toggleLogbookSelection(action.id)
@@ -404,7 +405,13 @@ class SettingsViewModel(
                 // Only the records that actually made it into the TQ8 may be
                 // marked uploaded later — never the whole candidate list.
                 lastLogbookUploadIds = preview.submittedIds
-                _uiState.update { it.copy(logbookUploadBusy = false, logbookPreview = preview, logbookGridWarning = preview.gridWarning) }
+                _uiState.update {
+                    it.copy(
+                        logbookUploadBusy = false,
+                        logbookPreview = preview,
+                        logbookPositionWarning = positionWarning(settingsRepo.getCurrentGrid(), preview.grids)
+                    )
+                }
             } catch (e: com.rtbishop.look4sat.core.domain.repository.LoTWOperationException) {
                 _uiState.update { it.copy(logbookUploadBusy = false, logbookUploadMessage = "Upload unavailable: ${e.reason}") }
             } catch (_: Exception) {
@@ -445,14 +452,14 @@ class SettingsViewModel(
 
     private fun dismissLogbookPreview() = _uiState.update { it.copy(logbookPreview = null) }
 
-    /** Operator chose "ignore" on the grid check: keep the prepared preview. */
-    private fun ignoreLogbookGridWarning() = _uiState.update { it.copy(logbookGridWarning = null) }
+    /** Operator chose "ignore" on the position check: keep the prepared preview. */
+    private fun ignoreLogbookPositionWarning() = _uiState.update { it.copy(logbookPositionWarning = null) }
 
     /** Operator chose to fix the station grid first: drop the prepared preview and leave. */
     private fun abandonLogbookForGridFix() {
         lotwUploadRepository.discardPreview()
         lastLogbookUploadIds = emptyList()
-        _uiState.update { it.copy(logbookGridWarning = null, logbookPreview = null) }
+        _uiState.update { it.copy(logbookPositionWarning = null, logbookPreview = null) }
     }
 
     /** Long-press entry: selection mode with the pressed record checked. */
@@ -496,7 +503,11 @@ class SettingsViewModel(
                 }
                 lastLogbookUploadIds = preview.submittedIds
                 _uiState.update {
-                    it.copy(logbookUploadBusy = false, logbookPreview = preview, logbookGridWarning = preview.gridWarning)
+                    it.copy(
+                        logbookUploadBusy = false,
+                        logbookPreview = preview,
+                        logbookPositionWarning = positionWarning(settingsRepo.getCurrentGrid(), preview.grids)
+                    )
                 }
             } catch (e: com.rtbishop.look4sat.core.domain.repository.LoTWOperationException) {
                 _uiState.update { it.copy(logbookUploadBusy = false, logbookUploadMessage = "Upload unavailable: ${e.reason}") }