build: release version 4.4.8-ba7opf.3 (555)

- 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

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -147,7 +147,7 @@ fun NavRoot(deeplink: String? = null) {
                         modifier = Modifier.fillMaxSize(),
                         color = MaterialTheme.colorScheme.background
                     ) {
-                        RadarDestination(navigateUp = navigateBack)
+                        RadarDestination(navigateUp = navigateBack, onOpenLoTWStation = navigateToLoTWStation)
                     }
                 }
                 entry<GridFinderDestination> {

core/data/src/main/java/com/rtbishop/look4sat/core/data/database/QsoDatabase.kt

@@ -20,7 +20,7 @@ import com.rtbishop.look4sat.core.data.database.entity.QsoEntity
  * upload receipts). Kept apart from [Look4SatDb] so existing installations
  * never need a migration of the satellite database.
  */
-@Database(entities = [QsoEntity::class], version = 2, exportSchema = false)
+@Database(entities = [QsoEntity::class], version = 3, exportSchema = false)
 abstract class QsoDatabase : RoomDatabase() {
     abstract fun qsoDao(): QsoDao
 }
@@ -31,3 +31,10 @@ val MIGRATION_QSO_1_2 = object : Migration(1, 2) {
         db.execSQL("ALTER TABLE qso_records ADD COLUMN lotwUploaded INTEGER NOT NULL DEFAULT 0")
     }
 }
+
+/** v2 → v3: keep the OPPOSITE station's grid set (multi-grid confirmations as LoTW reports them). */
+val MIGRATION_QSO_2_3 = object : Migration(2, 3) {
+    override fun migrate(db: SupportSQLiteDatabase) {
+        db.execSQL("ALTER TABLE qso_records ADD COLUMN theirVuccGrids TEXT NOT NULL DEFAULT ''")
+    }
+}

core/data/src/main/java/com/rtbishop/look4sat/core/data/database/entity/QsoEntity.kt

@@ -47,6 +47,7 @@ data class QsoEntity(
     @ColumnInfo(defaultValue = "0") val lotwReceived: Boolean = false,
     @ColumnInfo(defaultValue = "''") val lotwQslDate: String = "",
     @ColumnInfo(defaultValue = "''") val vuccGrids: String = "",
+    @ColumnInfo(defaultValue = "''") val theirVuccGrids: String = "",
     val dxcc: Int? = null,
     @ColumnInfo(defaultValue = "''") val country: String = "",
     val cqZone: Int? = null,

core/data/src/main/java/com/rtbishop/look4sat/core/data/injection/MainContainer.kt

@@ -30,6 +30,7 @@ import com.rtbishop.look4sat.core.data.database.Look4SatDb
 import com.rtbishop.look4sat.core.data.database.MIGRATION_1_2
 import com.rtbishop.look4sat.core.data.database.MIGRATION_2_3
 import com.rtbishop.look4sat.core.data.database.MIGRATION_QSO_1_2
+import com.rtbishop.look4sat.core.data.database.MIGRATION_QSO_2_3
 import com.rtbishop.look4sat.core.data.database.QsoDatabase
 import com.rtbishop.look4sat.core.data.framework.BluetoothReporter
 import com.rtbishop.look4sat.core.data.framework.Ft817Controller
@@ -103,7 +104,7 @@ class MainContainer(private val context: Context) : IMainContainer {
     override val lotwRepo: ILoTWRepository by lazy { LoTWRepository() }
     override val qsoRepository: IQsoRepository by lazy {
         val database = Room.databaseBuilder(context, QsoDatabase::class.java, "Look4SatQsoDB")
-            .addMigrations(MIGRATION_QSO_1_2)
+            .addMigrations(MIGRATION_QSO_1_2, MIGRATION_QSO_2_3)
             .build()
         QsoRepository(database.qsoDao(), Dispatchers.IO)
     }

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

@@ -39,7 +39,14 @@ internal class LoTWSigner(private val config: LoTWConfig) {
             !call.any(Char::isLetter) || !call.any(Char::isDigit)) fail(LoTWProblem.INVALID_CONTACT, call)
         if (!record.myCallsign.trim().equals(key.info.callsign, true)) fail(LoTWProblem.CALLSIGN_MISMATCH, call)
         val date = utc(record.startUtcMillis, "yyyy-MM-dd")
-        if (date < key.info.firstQsoDate || (key.info.lastQsoDate.isNotBlank() && date > key.info.lastQsoDate) || record.startUtcMillis > now) {
+        // A record dated after "now" gets its own message: it happens when the operator
+        // logged against a pass that had not started yet (out-of-window flow), and "fix the
+        // time" is the actionable advice. Reporting it as "outside the certificate" sent one
+        // operator hunting the certificate while the culprit was the record's future time.
+        if (record.startUtcMillis > now) {
+            fail(LoTWProblem.QSO_FUTURE, "$call @ ${utc(record.startUtcMillis, "MM-dd HH:mm'Z'")}")
+        }
+        if (date < key.info.firstQsoDate || (key.info.lastQsoDate.isNotBlank() && date > key.info.lastQsoDate)) {
             fail(LoTWProblem.QSO_DATE, call)
         }
         fun mhz(hz: Long?): String = hz?.let { BigDecimal.valueOf(it, 6).stripTrailingZeros().toPlainString() }.orEmpty()

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

@@ -279,6 +279,13 @@ class LoTWUploadRepository internal constructor(
                     else -> contact
                 }
             }
+            // The station-location grids this batch is signed with: the primary grid plus the
+            // MY_VUCC_GRIDS set (1 inside a grid, 2 on a line, 4 on a corner — see [LoTWConfig]).
+            val locationGrids = buildList {
+                signing.location["GRIDSQUARE"]?.takeIf(String::isNotBlank)?.let(::add)
+                signing.location["MY_VUCC_GRIDS"]?.split(',')
+                    ?.map(String::trim)?.filter(String::isNotBlank)?.let(::addAll)
+            }.distinct()
             val preview = LoTWUploadPreview(
                 UUID.randomUUID().toString(), signing.key.info.callsign, signing.key.info.dxcc, signing.location.getValue("GRIDSQUARE"),
                 contacts.size, skipped,
@@ -289,7 +296,9 @@ class LoTWUploadRepository internal constructor(
                 unavailable,
                 reasons.toMap(),
                 duplicates,
-                contacts.map { it.record.id }
+                contacts.map { it.record.id },
+                locationGrids,
+                resubmit
             )
             if (contacts.isNotEmpty()) pending = Pending(
                 preview,

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

@@ -285,7 +285,9 @@ class LoTWRepository : ILoTWRepository {
                 myGrid = myGrids.firstOrNull(),
                 myGrids = myGrids,
                 myCallsign = myCallsign,
-                stationKey = stationKey
+                stationKey = stationKey,
+                // Copy, never the live buffer — resetRecord() clears it.
+                theirGrids = gridsInRecord.distinct().toList()
             )
             for (grid in gridsInRecord) {
                 result.getOrPut(grid) { mutableListOf() }.add(qso)

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

@@ -16,8 +16,11 @@ import com.rtbishop.look4sat.core.domain.logbook.AdifImportResult
 import com.rtbishop.look4sat.core.domain.logbook.IQsoRepository
 import com.rtbishop.look4sat.core.domain.logbook.QsoRecord
 import com.rtbishop.look4sat.core.domain.logbook.QsoStatus
+import com.rtbishop.look4sat.core.domain.logbook.bandsMatchOrMirror
+import com.rtbishop.look4sat.core.domain.logbook.contentScore
 import com.rtbishop.look4sat.core.domain.logbook.displayMode
 import com.rtbishop.look4sat.core.domain.logbook.sameConfirmedContact
+import com.rtbishop.look4sat.core.domain.logbook.sameContactIdentity
 import com.rtbishop.look4sat.core.domain.logbook.satelliteIdentity
 import com.rtbishop.look4sat.core.domain.logbook.splitConfirmationPairs
 import com.rtbishop.look4sat.core.domain.logbook.withConfirmation
@@ -54,14 +57,14 @@ class QsoRepository(
                 dao.save(record.copy(
                     id = 0L,
                     lotwUploaded = false, lotwConfirmed = false, lotwReceived = false,
-                    lotwQslDate = "", vuccGrids = emptyList(),
+                    lotwQslDate = "", vuccGrids = emptyList(), theirVuccGrids = emptyList(),
                     dxcc = null, country = "", cqZone = null, region = ""
                 ).toEntity())
             } else {
                 val saved = if (previous?.lotwConfirmed == true && sameConfirmedContact(record, previous)) {
                     record.withConfirmation(previous)
                 } else if (previous?.lotwConfirmed == true) record.copy(
-                    lotwConfirmed = false, lotwQslDate = "", vuccGrids = emptyList(),
+                    lotwConfirmed = false, lotwQslDate = "", vuccGrids = emptyList(), theirVuccGrids = emptyList(),
                     dxcc = null, country = "", cqZone = null, region = ""
                 ) else record
                 val received = if (previous != null && (
@@ -76,9 +79,18 @@ class QsoRepository(
 
     override suspend fun delete(id: Long) = withContext(dispatcher) { importMutex.withLock { dao.delete(id) } }
 
-    override suspend fun markUploaded(ids: List<Long>) = withContext(dispatcher) {
+    override suspend fun markUploaded(ids: List<Long>, grids: List<String>) = withContext(dispatcher) {
         if (ids.isEmpty()) return@withContext
         dao.markUploaded(ids)
+        // Stamp the station grid set this batch went out under (a line/corner prefill from
+        // the grid finder carries 2–4 grids). The logbook row shows it after the timestamp.
+        val normalized = grids.map { it.trim().uppercase(Locale.US).take(4) }
+            .filter { it.length >= 4 }.distinct().sorted()
+        if (normalized.isEmpty()) return@withContext
+        val stamped = ids.mapNotNull { id ->
+            dao.find(id)?.toDomain()?.takeIf { it.vuccGrids != normalized }?.copy(vuccGrids = normalized)
+        }
+        if (stamped.isNotEmpty()) dao.saveBatch(stamped.map { it.toEntity() })
     }
 
     override suspend fun exportAdi(ids: Set<Long>?, includeIncomplete: Boolean): String = withContext(dispatcher) {
@@ -132,9 +144,7 @@ class QsoRepository(
         val renames = rewriteOfficialNames(working)
         val lookup = working.indices.groupBy { working[it].confirmationLookupKey() }
             .mapValues { it.value.toMutableList() }.toMutableMap()
-        val keyIndex = working.indices.groupBy { stableQsoKey(working[it]) }
-            .mapValues { it.value.toMutableList() }.toMutableMap()
-        val knownKeys = keyIndex.keys.toMutableSet()
+        val knownKeys = working.map { stableQsoKey(it) }.toMutableSet()
         val changes = linkedMapOf<Int, QsoRecord>().apply {
             putAll(consolidation.merged)
             putAll(renames)
@@ -149,27 +159,38 @@ class QsoRepository(
             val exact = candidates.filter { working[it].startUtcMillis == remote.startUtcMillis }
             val match = exact.singleOrNull() ?: candidates.singleOrNull()
             if (match == null) {
-                // A confirmation downloaded by the pre-fix parser sits as its own row with the
-                // band direction read mirrored (the downlink was stored as the uplink). It has no
-                // local partner (so nothing folds it) and its dedupe key equals the fresh report,
-                // so it would otherwise be skipped forever, keeping the wrong band on display.
-                // When the bands are exactly mirrored, adopt the report's direction instead.
-                val stale = if (fromLoTW) keyIndex[stableQsoKey(remote)]?.firstOrNull()
-                    ?.takeIf { index -> working[index].lotwConfirmed &&
-                        working[index].band.equals(remote.rxBand, true) &&
-                        working[index].rxBand.equals(remote.band, true) } else null
-                if (stale != null) {
-                    val fixed = working[stale].copy(band = remote.band, rxBand = remote.rxBand)
-                    working[stale] = fixed
-                    changes[stale] = fixed
-                    updated++
+                // A confirmation downloaded by an early release sits as its own row with the
+                // band direction read mirrored (the downlink was stored as the uplink). The
+                // strict lookup above cannot see it: its bands fail the comparison, and its
+                // dedupe key can differ too (fields written by older releases — timestamp
+                // precision, FT4 sub-mode spelling, missing callsign — so it is not treated
+                // as known either). Fold the report into the richest mirrored row instead of
+                // inserting a second row next to it; left as two rows, neither consolidation
+                // nor a later sync could reliably heal them.
+                val mirroredRows = if (fromLoTW) lookup[remote.confirmationLookupKey()].orEmpty().filter { index ->
+                    working[index].band.isNotBlank() && remote.band.isNotBlank() &&
+                        !working[index].band.equals(remote.band, true) &&
+                        sameContactIdentity(working[index], remote) &&
+                        bandsMatchOrMirror(working[index], remote)
+                } else emptyList()
+                if (mirroredRows.isNotEmpty()) {
+                    val target = mirroredRows.maxBy { contentScore(working[it]) }
+                    mirroredRows.forEach { index ->
+                        val healed = working[index].copy(
+                            band = remote.band.ifBlank { working[index].band },
+                            rxBand = remote.rxBand.ifBlank { working[index].rxBand }
+                        )
+                        val folded = if (index == target) healed.withConfirmation(remote) else healed
+                        working[index] = folded
+                        changes[index] = folded
+                    }
+                    updated += mirroredRows.size
                     return@forEach
                 }
                 if (stableQsoKey(remote) in knownKeys) { skipped++; return@forEach }
                 val added = remote.copy(id = 0L, satelliteName = officialSatelliteName(remote.satelliteName))
                 changes[working.size] = added
                 lookup.getOrPut(added.confirmationLookupKey()) { mutableListOf() }.add(working.size)
-                keyIndex.getOrPut(stableQsoKey(added)) { mutableListOf() }.add(working.size)
                 knownKeys += stableQsoKey(added)
                 working += added
                 imported++
@@ -268,6 +289,7 @@ private fun QsoEntity.toDomain() = QsoRecord(
     lotwReceived = lotwReceived,
     lotwQslDate = lotwQslDate,
     vuccGrids = vuccGrids.split(',').filter(String::isNotBlank),
+    theirVuccGrids = theirVuccGrids.split(',').filter(String::isNotBlank),
     dxcc = dxcc,
     country = country,
     cqZone = cqZone,
@@ -304,6 +326,7 @@ private fun QsoRecord.toEntity() = QsoEntity(
     lotwReceived = lotwReceived,
     lotwQslDate = lotwQslDate,
     vuccGrids = vuccGrids.joinToString(","),
+    theirVuccGrids = theirVuccGrids.joinToString(","),
     dxcc = dxcc,
     country = country,
     cqZone = cqZone,

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/LoTWRepositoryTest.kt

@@ -167,6 +167,29 @@ class LoTWRepositoryTest {
         result.values.forEach { assertEquals(1, it.size) }
     }
 
+    @Test
+    fun parseQsosCapturesOppositeGridSet() {
+        // The opposite station's grids (GRIDSQUARE + VUCC_GRIDS) must ride on the
+        // GridQso so the logbook can show multi-grid confirmations in its QSL slot.
+        val single = "<PROP_MODE:3>SAT\n<SAT_NAME:5>FO-29\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        assertEquals(
+            listOf("NL47"),
+            repo.parseConfirmedGridQsos(report(single))!!["NL47"]!!.first().theirGrids
+        )
+        val pair = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n<VUCC_GRIDS:11>EN52en,EN53fa\n<EOR>\n"
+        assertEquals(
+            listOf("EN52", "EN53"),
+            repo.parseConfirmedGridQsos(report(pair))!!["EN52"]!!.first().theirGrids
+        )
+        // A 6-char GRIDSQUARE plus a VUCC pair: every field, truncated to 4 chars, in order.
+        val six = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n" +
+            "<GRIDSQUARE:6>OM60IL\n<VUCC_GRIDS:11>EN52en,EN53fa\n<EOR>\n"
+        assertEquals(
+            listOf("OM60", "EN52", "EN53"),
+            repo.parseConfirmedGridQsos(report(six))!!["OM60"]!!.first().theirGrids
+        )
+    }
+
     @Test
     fun parseQsosRejectsBodyWithoutEoh() {
         assertNull(repo.parseConfirmedGridQsos("<HTML>Username/password incorrect</HTML>"))

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

@@ -52,6 +52,9 @@ class QsoRepositoryTest {
         // The row is also renamed to the ARRL spelling while it is merged.
         assertEquals("SO-50", rows.first().satelliteName)
         assertEquals(145_850_000L, rows.first().txFrequencyHz)
+        // The opposite station's grid set from the report lands on the row.
+        assertEquals("EN52", rows.first().theirGrid)
+        assertEquals("EN52,EN53", rows.first().theirVuccGrids)
     }
 
     @Test
@@ -124,6 +127,106 @@ class QsoRepositoryTest {
         assertEquals(setOf("SO-50", "FOO-1"), dao.getAll().map { it.satelliteName }.toSet())
     }
 
+    @Test
+    fun consolidateConfirmations_foldsADoubledConfirmedPairKeepingTheRicherRow() = runBlocking {
+        // The mirrored import the old parser created (no frequencies, no report-side grids —
+        // the pre-fix parser filled neither — band direction reversed)... seeded FIRST so it
+        // carries the lower id.
+        dao.save(
+            reportConfirmation(satName = "SO-50")
+                .copy(band = "70CM", rxBand = "2M", theirGrid = "", theirVuccGrids = emptyList())
+                .toEntity()
+        )
+        // ...plus the app row that was confirmed on its own later (frequencies, upload state).
+        val localId = dao.save(
+            loggedInApp("SO-50", lotwUploaded = true).copy(lotwConfirmed = true).toEntity()
+        )
+
+        assertEquals(1, repository.consolidateConfirmations())
+
+        val rows = dao.getAll()
+        assertEquals(1, rows.size)
+        assertEquals(localId, rows.first().id)
+        // The surviving row keeps the correct uplink-first bands and gains the report fills.
+        assertEquals("2M", rows.first().band)
+        assertEquals("70CM", rows.first().rxBand)
+        assertEquals("OL62", rows.first().myGrid)
+        assertEquals(318, rows.first().dxcc)
+        assertEquals("China", rows.first().country)
+        assertTrue(rows.first().lotwUploaded)
+    }
+
+    @Test
+    fun mergeLoTW_healsADoubledMirroredContact() = runBlocking {
+        // Two mirrored copies of one confirmation (as the pre-fix parser imported on separate
+        // syncs — no frequencies, no report-side grids): the full sync must consolidate them
+        // into one row with the report's direction.
+        val stale = reportConfirmation(satName = "SO-50")
+            .copy(band = "70CM", rxBand = "2M", theirGrid = "", theirVuccGrids = emptyList())
+        dao.save(stale.toEntity())
+        dao.save(stale.copy(id = 0L).toEntity())
+
+        repository.mergeLoTW(listOf(reportConfirmation(satName = "SO-50")))
+
+        val rows = dao.getAll()
+        assertEquals(1, rows.size)
+        assertEquals("2M", rows.first().band)
+        assertEquals("70CM", rows.first().rxBand)
+        // The report's fills land on the healed row.
+        assertEquals("EN52", rows.first().theirGrid)
+    }
+
+    @Test
+    fun mergeLoTW_healsAMirroredRowWhoseDedupeKeyDivergedFromTheReport() = runBlocking {
+        // The doubled contacts of the reported bug: a mirrored row written by an older release
+        // (millisecond-precision timestamp here — enough to make the dedupe key, which holds
+        // the exact time, differ from the report's) used to gain a second row next to it
+        // instead of being healed, because every net relied on the key or the strict bands.
+        val staleId = dao.save(
+            reportConfirmation(satName = "SO-50")
+                .copy(
+                    band = "70CM", rxBand = "2M", theirGrid = "", theirVuccGrids = emptyList(),
+                    startUtcMillis = qsoStart + 456L
+                )
+                .toEntity()
+        )
+
+        repository.mergeLoTW(listOf(reportConfirmation(satName = "SO-50")))
+
+        val rows = dao.getAll()
+        assertEquals(1, rows.size)
+        assertEquals(staleId, rows.first().id)
+        assertEquals("2M", rows.first().band)
+        assertEquals("70CM", rows.first().rxBand)
+        assertTrue(rows.first().lotwConfirmed)
+        assertEquals("EN52", rows.first().theirGrid)
+    }
+
+    @Test
+    fun mergeLoTW_foldsAMirroredRowSpelledAsPlainMfskIntoItsFt4Report() = runBlocking {
+        // Releases that persisted no sub-mode stored FT4 rows as plain MFSK while the report
+        // carries MFSK + FT4. The spelling difference must not block the heal either.
+        dao.save(
+            reportConfirmation(satName = "SO-50")
+                .copy(
+                    band = "70CM", rxBand = "2M", mode = "MFSK", submode = "",
+                    theirGrid = "", theirVuccGrids = emptyList()
+                )
+                .toEntity()
+        )
+
+        repository.mergeLoTW(
+            listOf(reportConfirmation(satName = "SO-50").copy(mode = "MFSK", submode = "FT4"))
+        )
+
+        val rows = dao.getAll()
+        assertEquals(1, rows.size)
+        assertEquals("2M", rows.first().band)
+        assertEquals("70CM", rows.first().rxBand)
+        assertTrue(rows.first().lotwConfirmed)
+        assertEquals("EN52", rows.first().theirGrid)
+    }
+
     @Test
     fun mergeLoTW_fixesBandDirectionOfAStaleConfirmationRow() = runBlocking {
         // A confirmation downloaded by the pre-fix parser: ARRL name but the band direction
@@ -221,7 +324,8 @@ class QsoRepositoryTest {
         cqz = 24,
         state = "GD",
         myGrid = "OL62",
-        myGrids = setOf("OL62", "OL63")
+        myGrids = setOf("OL62", "OL63"),
+        theirGrids = listOf("EN52", "EN53")
     ).toConfirmedRecord("BA7OPF")
 
     private fun QsoRecord.toEntity() = QsoEntity(
@@ -254,6 +358,7 @@ class QsoRepositoryTest {
         lotwReceived = lotwReceived,
         lotwQslDate = lotwQslDate,
         vuccGrids = vuccGrids.joinToString(","),
+        theirVuccGrids = theirVuccGrids.joinToString(","),
         dxcc = dxcc,
         country = country,
         cqZone = cqZone,

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/logbook/IQsoRepository.kt

@@ -17,7 +17,12 @@ interface IQsoRepository {
     suspend fun find(id: Long): QsoRecord?
     suspend fun save(record: QsoRecord): Long
     suspend fun delete(id: Long)
-    suspend fun markUploaded(ids: List<Long>)
+    /**
+     * Marks the batch as uploaded and stamps the station-location grids the batch was
+     * signed with (1–4 gridsquares: inside a grid / on a line / on a corner), so the
+     * logbook row can show which grids the QSO went out under.
+     */
+    suspend fun markUploaded(ids: List<Long>, grids: List<String> = emptyList())
     suspend fun exportAdi(ids: Set<Long>? = null, includeIncomplete: Boolean = false): String
     suspend fun importAdi(content: String): AdifImportResult
     suspend fun mergeConfirmed(records: List<QsoRecord>): AdifImportResult

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/logbook/LoTWReportBridge.kt

@@ -27,6 +27,8 @@ fun GridQso.toConfirmedRecord(accountCallsign: String): QsoRecord = QsoRecord(
     startUtcMillis = epochMs,
     theirCallsign = call,
     myCallsign = accountCallsign.trim().uppercase(),
+    theirGrid = theirGrids.firstOrNull().orEmpty(),
+    theirVuccGrids = theirGrids,
     myGrid = (myGrids.firstOrNull() ?: myGrid).orEmpty(),
     vuccGrids = myGrids.toList(),
     band = bandUp,

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/logbook/LoTWUploadMessages.kt

@@ -31,6 +31,7 @@ fun LoTWProblem.label(): String = when (this) {
     LoTWProblem.SATELLITE -> "satellite name not in ARRL's list"
     LoTWProblem.MODE -> "mode not accepted by LoTW"
     LoTWProblem.QSO_DATE -> "date outside the certificate"
+    LoTWProblem.QSO_FUTURE -> "record time is in the future"
     LoTWProblem.CALLSIGN_MISMATCH -> "MY callsign does not match the certificate"
     LoTWProblem.INVALID_CONTACT -> "invalid callsign/record"
     LoTWProblem.STATION_GRID -> "station grid missing"

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/logbook/LogbookResubmit.kt

@@ -0,0 +1,20 @@
+/*
+ * 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.logbook
+
+/**
+ * The records a resubmit actually re-signs: whatever the operator checked, complete rows only.
+ *
+ * Unlike a normal upload this deliberately keeps already-uploaded and confirmed records —
+ * the point is to send them again under a corrected station location, and LoTW treats an
+ * identical contact (call/band/mode/time/satellite) as an update of the existing record.
+ */
+fun resubmitCandidates(records: List<QsoRecord>, selectedIds: Set<Long>): List<QsoRecord> =
+    records.filter { it.id in selectedIds && it.status == QsoStatus.COMPLETE }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/logbook/QsoConfirmationMerge.kt

@@ -80,7 +80,7 @@ fun sameContactIdentity(local: QsoRecord, remote: QsoRecord): Boolean {
         local.theirCallsign.trim().equals(remote.theirCallsign.trim(), true) &&
         (local.myCallsign.isBlank() || remote.myCallsign.isBlank() || local.myCallsign.equals(remote.myCallsign, true)) &&
         local.isSatellite == remote.isSatellite &&
-        local.displayMode == remote.displayMode &&
+        local.matchableMode == remote.matchableMode &&
         abs(local.startUtcMillis - remote.startUtcMillis) < 60_000L
 }
 
@@ -93,45 +93,100 @@ fun sameConfirmedContact(local: QsoRecord, remote: QsoRecord): Boolean =
     sameContactIdentity(local, remote) && sameBandOrBlank(local.band, remote.band)
 
 fun QsoRecord.confirmationLookupKey(): String = listOf(
-    theirCallsign.trim().uppercase(Locale.US), satelliteIdentity(satelliteName), displayMode
+    theirCallsign.trim().uppercase(Locale.US), satelliteIdentity(satelliteName), matchableMode
 ).joinToString("|")
 
-/** A local row and the confirmation row that belongs to it, as indices into one list. */
+/** A row to keep and the duplicate row to fold into it (then delete), as indices into one list. */
 data class SplitConfirmationPair(val localIndex: Int, val confirmationIndex: Int)
 
 /**
- * Rows that a confirmation should have been folded into but was not, so they can be
- * consolidated back into one.
+ * Rows that should have been one row but were not, so they can be consolidated back into one.
  *
- * Confirmations merged before the identity fix landed as their own rows: the tracker
- * name vs ARRL name comparison failed, and the band direction of the report was read
- * mirrored (BAND_RX was taken as the uplink), so even satellites with matching names
- * were stored twice. The pair is only accepted when the contact identity matches and
- * the bands are either identical or exactly mirrored — the signature of that second
- * mismatch — which keeps unrelated QSOs of the same operator and minute apart.
+ * Two known holes leave a contact stored twice:
+ *
+ * 1. Confirmations merged before the identity fix landed as their own rows: the tracker name
+ *    vs ARRL name comparison failed, and the band direction of the report was read mirrored
+ *    (BAND_RX taken as the uplink) — so an unconfirmed local row and its confirmation stayed
+ *    apart. Pass 1 folds the confirmation into the local row.
+ * 2. A contact can also end up with TWO confirmed rows: a mirrored import the old parser
+ *    created plus the row that was confirmed on its own later, or a duplicate import added
+ *    while ambiguous candidates made the match fail. Pass 1 cannot fold those — both sides
+ *    are confirmed — so pass 2 pairs confirmed rows with each other.
+ *
+ * Both passes accept a pair only when the contact identity matches and the bands are either
+ * identical or exactly mirrored — the mirror being the fingerprint of the pre-fix parser —
+ * which keeps unrelated QSOs of the same operator and minute apart. In pass 2 the row with
+ * more content is kept (frequencies/grids/reports beat an empty mirrored import) and the
+ * other one is folded into it, so no data is lost.
  */
 fun splitConfirmationPairs(records: List<QsoRecord>): List<SplitConfirmationPair> {
-    val pendingIndices = records.indices.filter { !records[it].lotwConfirmed }
     val taken = mutableSetOf<Int>()
-    return records.indices.filter { records[it].lotwConfirmed }.mapNotNull { confirmationIndex ->
+    val pairs = mutableListOf<SplitConfirmationPair>()
+    // Pass 1: fold a downloaded confirmation into the unconfirmed local row it belongs to.
+    val pendingIndices = records.indices.filter { !records[it].lotwConfirmed }
+    records.indices.filter { records[it].lotwConfirmed }.forEach { confirmationIndex ->
         val confirmation = records[confirmationIndex]
         val localIndex = pendingIndices.firstOrNull { index ->
             index !in taken && sameContactIdentity(records[index], confirmation) &&
                 bandsMatchOrMirror(records[index], confirmation)
-        } ?: return@mapNotNull null
+        } ?: return@forEach
         taken += localIndex
-        SplitConfirmationPair(localIndex, confirmationIndex)
+        taken += confirmationIndex
+        pairs += SplitConfirmationPair(localIndex, confirmationIndex)
     }
+    // Pass 2: two CONFIRMED rows describing the same contact (mirrored import + the confirmed
+    // row it never folded into, or a duplicate import). Keep the richer row, drop the other.
+    val confirmedLeft = records.indices.filter { records[it].lotwConfirmed && it !in taken }
+    confirmedLeft.forEach { index ->
+        if (index in taken) return@forEach
+        val cluster = mutableListOf(index)
+        confirmedLeft.forEach { candidate ->
+            if (candidate != index && candidate !in taken &&
+                cluster.all {
+                    sameContactIdentity(records[it], records[candidate]) &&
+                        bandsMatchOrMirror(records[it], records[candidate])
+                }
+            ) {
+                cluster += candidate
+            }
+        }
+        if (cluster.size < 2) return@forEach
+        cluster.forEach { taken += it }
+        val keep = cluster.maxBy { contentScore(records[it]) }
+        cluster.filter { it != keep }.forEach { pairs += SplitConfirmationPair(keep, it) }
+    }
+    return pairs
+}
+
+/** More operator/report detail first — decides which row survives a pass-2 fold. */
+fun contentScore(record: QsoRecord): Int {
+    var score = 0
+    // Frequencies are the strongest operator-entered signal; a band label consistent with its
+    // frequency (frequencyBand(tx) == band) beats the mirrored parser output, whose labels
+    // contradict the side they describe.
+    record.txFrequencyHz?.let { hz -> score += 2; if (record.band == frequencyBand(hz)) score += 1 }
+    record.rxFrequencyHz?.let { hz -> score += 2; if (record.rxBand == frequencyBand(hz)) score += 1 }
+    score += listOf(record.sentReport, record.receivedReport, record.myGrid, record.theirGrid, record.comment)
+        .count { it.isNotBlank() }
+    score += record.vuccGrids.size
+    score += record.theirVuccGrids.size
+    if (record.lotwUploaded) score += 1
+    if (record.lotwReceived) score += 1
+    if (record.dxcc != null) score += 1
+    if (record.country.isNotBlank()) score += 1
+    if (record.lotwQslDate.isNotBlank()) score += 1
+    return score
 }
 
 /** Same band on both sides, or the mirrored pair the pre-fix parser produced. */
-private fun bandsMatchOrMirror(local: QsoRecord, confirmation: QsoRecord): Boolean =
+fun bandsMatchOrMirror(local: QsoRecord, confirmation: QsoRecord): Boolean =
     (sameBandOrBlank(local.band, confirmation.band) && sameBandOrBlank(local.rxBand, confirmation.rxBand)) ||
         (sameBandOrBlank(local.band, confirmation.rxBand) && sameBandOrBlank(local.rxBand, confirmation.band))
 
 fun QsoRecord.withConfirmation(confirmed: QsoRecord): QsoRecord = copy(
     myCallsign = myCallsign.ifBlank { confirmed.myCallsign },
     theirGrid = confirmed.theirGrid.ifBlank { theirGrid },
+    theirVuccGrids = confirmed.theirVuccGrids.ifEmpty { theirVuccGrids },
     myGrid = myGrid.ifBlank { confirmed.myGrid },
     sentReport = sentReport.ifBlank { confirmed.sentReport },
     receivedReport = receivedReport.ifBlank { confirmed.receivedReport },
@@ -159,6 +214,12 @@ val QsoRecord.displayMode: String
         return label.trim().uppercase(Locale.US)
     }
 
+/** The mode label as the merge compares it: satellite FT4 is written as MFSK + FT4, and
+ *  releases that dropped the sub-mode persisted plain MFSK — the same mode, spelled
+ *  differently, so both spellings must match. */
+val QsoRecord.matchableMode: String
+    get() = displayMode.let { if (it == "MFSK") "FT4" else it }
+
 val QsoRecord.isSatellite: Boolean
     get() = propagationMode.equals("SAT", true) || (propagationMode.isBlank() && satelliteName.isNotBlank())
 

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/logbook/QsoModels.kt

@@ -18,6 +18,10 @@ data class QsoRecord(
     val theirCallsign: String,
     val myCallsign: String,
     val theirGrid: String = "",
+    /** Every 4-char grid the OPPOSITE station logged this QSO under (ADIF
+     *  <GRIDSQUARE> + <VUCC_GRIDS>; 1–4 grids). [theirGrid] keeps the first;
+     *  the logbook's QSL slot shows the abbreviated set. */
+    val theirVuccGrids: List<String> = emptyList(),
     val myGrid: String = "",
     val sentReport: String = "",
     val receivedReport: String = "",

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/GridQso.kt

@@ -72,7 +72,13 @@ data class GridQso(
      *  MY_STATE + MY_CQ_ZONE + MY_ITU_ZONE + MY_IOTA + MY_COUNTRY), so the
      *  operated-grid selector can group QSOs per 台址 and show each 台址 with
      *  its full grid set. Null for data synced before this field existed. */
-    val stationKey: String? = null
+    val stationKey: String? = null,
+    /** Every 4-char grid of the OPPOSITE station for this QSO — ADIF
+     *  <GRIDSQUARE> plus every field of <VUCC_GRIDS> (comma-separated when
+     *  the contact spans several squares; up to four in one QSO). The logbook
+     *  shows the set in the QSL slot of a confirmed row; [myGrids] is the
+     *  same thing for the user's own side. */
+    val theirGrids: List<String> = emptyList()
 ) {
     /** Short uplink/downlink band label ("U/V", "V/A"), or "" when unknown. */
     val bandLabel: String

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

@@ -19,6 +19,7 @@
 package com.rtbishop.look4sat.core.domain.repository
 
 import com.rtbishop.look4sat.core.domain.logbook.QsoRecord
+import java.util.Locale
 
 interface ILoTWUploadRepository {
     suspend fun certificate(): LoTWCertificate?
@@ -96,7 +97,23 @@ data class LoTWUploadPreview(
     val duplicateSkipped: Int = 0,
     /** Ids of the records that actually made it into this TQ8 batch. Only these
      *  may be marked "uploaded" after an accepted POST — never the full candidate list. */
-    val submittedIds: List<Long> = emptyList()
+    val submittedIds: List<Long> = emptyList(),
+    /** The full station-location grid set this batch is signed with (1 inside a grid,
+     *  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(),
+    /** 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 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>
 )
 
 /** Why the un-uploadable records of a selection cannot be signed, and what was left out. */
@@ -128,7 +145,25 @@ class LoTWOperationException(val reason: LoTWProblem, val detail: String = "") :
 
 enum class LoTWProblem {
     CERTIFICATE_PASSWORD, CERTIFICATE_INVALID, CERTIFICATE_EXPIRED, CERTIFICATE_MISSING,
-    CERTIFICATE_FORMAT, STORAGE, EMPTY_SELECTION, CALLSIGN_MISMATCH, QSO_DATE, STATION_GRID,
+    CERTIFICATE_FORMAT, STORAGE, EMPTY_SELECTION, CALLSIGN_MISMATCH, QSO_DATE, QSO_FUTURE, STATION_GRID,
     STATION_REGION, STATION_ZONE, STATION_IOTA, MODE, BAND, SATELLITE, INVALID_CONTACT,
     LOCATION_MISMATCH, TOO_MANY_CONTACTS
 }
+
+/**
+ * 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 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
+    if (current in station) return null
+    return LoTWPositionWarning(current, station.sorted())
+}
+
+/** 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/logbook/LogbookMergeTest.kt

@@ -40,7 +40,8 @@ class LogbookMergeTest {
         propagationMode = "SAT",
         status = QsoStatus.COMPLETE,
         lotwConfirmed = true,
-        vuccGrids = listOf("OM60", "OM50")
+        vuccGrids = listOf("OM60", "OM50"),
+        theirVuccGrids = listOf("EN52", "EN53")
     )
 
     @Test
@@ -73,12 +74,24 @@ class LogbookMergeTest {
         assertEquals(local.confirmationLookupKey(), confirmed.confirmationLookupKey())
     }
 
+    @Test
+    fun confirmationLookupKey_groupsMfskAndFt4Spellings() {
+        // Satellite FT4 is MFSK + FT4; a row persisted by an older release as plain MFSK is
+        // the same mode and must resolve to the same contact.
+        val plainMfsk = confirmed.copy(mode = "MFSK", submode = "")
+        val ft4 = confirmed.copy(mode = "MFSK", submode = "FT4")
+        assertEquals(plainMfsk.confirmationLookupKey(), ft4.confirmationLookupKey())
+        assertTrue(sameContactIdentity(plainMfsk, ft4))
+    }
+
     @Test
     fun withConfirmation_marksConfirmedAndMergesVuccGrids() {
         val merged = local.withConfirmation(confirmed)
         assertTrue(merged.lotwConfirmed)
         assertTrue(merged.lotwReceived)
         assertEquals(listOf("OM60", "OM50"), merged.vuccGrids)
+        // The opposite station's grid set arrives with the confirmation too.
+        assertEquals(listOf("EN52", "EN53"), merged.theirVuccGrids)
         // Local myCallsign is kept when present; only blanks are backfilled.
         assertEquals("ba7opf", merged.myCallsign)
     }
@@ -97,13 +110,16 @@ class LogbookMergeTest {
             cqz = 24,
             state = "GD",
             myGrid = "OM60",
-            myGrids = setOf("OM60", "OM50")
+            myGrids = setOf("OM60", "OM50"),
+            theirGrids = listOf("EN52", "EN53")
         )
         val record = qso.toConfirmedRecord("ba7opf")
         assertEquals("BH6RJD", record.theirCallsign)
         assertEquals("BA7OPF", record.myCallsign)
         assertEquals("OM60", record.myGrid)
         assertEquals(listOf("OM60", "OM50"), record.vuccGrids)
+        assertEquals("EN52", record.theirGrid)
+        assertEquals(listOf("EN52", "EN53"), record.theirVuccGrids)
         assertTrue(record.lotwConfirmed)
         assertTrue(record.isSatellite)
         assertEquals("70CM", record.band)
@@ -198,6 +214,30 @@ class LogbookMergeTest {
         assertEquals(1, pairs.first().confirmationIndex)
     }
 
+    @Test
+    fun splitConfirmationPairs_foldsTwoConfirmedRowsAndKeepsTheRicher() {
+        // A contact stored twice with BOTH sides confirmed: the mirrored import the old parser
+        // created (no frequencies, report-only fills) plus the app row that was confirmed on
+        // its own later (frequencies, upload state). Pass 1 cannot fold those; without pass 2
+        // they stay doubled in the logbook forever.
+        val mirroredImport = reportedRecord("SO-50", band = "70CM", rxBand = "2M").copy(id = 1L)
+        val confirmedLocal = loggedRecord("SAUDISAT 1C", 145_850_000L, 436_795_000L)
+            .copy(id = 2L, lotwConfirmed = true)
+        val pairs = splitConfirmationPairs(listOf(mirroredImport, confirmedLocal))
+        assertEquals(1, pairs.size)
+        // The richer row (frequencies + consistent bands + upload state) is the survivor.
+        assertEquals(1, pairs.first().localIndex)
+        assertEquals(0, pairs.first().confirmationIndex)
+    }
+
+    @Test
+    fun splitConfirmationPairs_keepsTwoConfirmedRowsOfDifferentMinutesApart() {
+        val one = reportedRecord("SO-50", band = "70CM", rxBand = "2M").copy(id = 1L)
+        val otherMinute = reportedRecord("SO-50", band = "2M", rxBand = "70CM")
+            .copy(id = 2L, startUtcMillis = REPORTED_START + 90_000L)
+        assertTrue(splitConfirmationPairs(listOf(one, otherMinute)).isEmpty())
+    }
+
     @Test
     fun splitConfirmationPairs_keepsUnrelatedRowsApart() {
         val uploaded = loggedRecord("SAUDISAT 1C", 145_850_000L, 436_795_000L)

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/logbook/LogbookResubmitTest.kt

@@ -0,0 +1,61 @@
+/*
+ * 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.logbook
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class LogbookResubmitTest {
+
+    private fun record(
+        id: Long,
+        status: QsoStatus = QsoStatus.COMPLETE,
+        uploaded: Boolean = false,
+        confirmed: Boolean = false
+    ) = QsoRecord(
+        id = id,
+        startUtcMillis = 1_760_000_000_000L + id,
+        theirCallsign = "BG5JSB",
+        myCallsign = "BA7OPF",
+        mode = "FM",
+        satelliteName = "SO-50",
+        status = status,
+        lotwUploaded = uploaded,
+        lotwConfirmed = confirmed
+    )
+
+    @Test
+    fun keepsUploadedAndConfirmedRecords() {
+        // The whole point of a resubmit: rows already on LoTW must not be filtered out.
+        val records = listOf(record(1, uploaded = true), record(2, confirmed = true), record(3))
+        assertEquals(listOf(1L, 2L, 3L), resubmitCandidates(records, setOf(1, 2, 3)).map { it.id })
+    }
+
+    @Test
+    fun dropsRecordsOutsideTheSelection() {
+        val records = listOf(record(1), record(2), record(3))
+        assertEquals(listOf(2L), resubmitCandidates(records, setOf(2)).map { it.id })
+    }
+
+    @Test
+    fun dropsIncompleteRecords() {
+        val records = listOf(
+            record(1, status = QsoStatus.DRAFT),
+            record(2, status = QsoStatus.ABORTED),
+            record(3, status = QsoStatus.COMPLETE)
+        )
+        assertEquals(listOf(3L), resubmitCandidates(records, setOf(1, 2, 3)).map { it.id })
+    }
+
+    @Test
+    fun emptySelectionYieldsNothing() {
+        assertEquals(emptyList<Long>(), resubmitCandidates(listOf(record(1)), emptySet()).map { it.id })
+    }
+}

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/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/Components.kt

@@ -492,6 +492,7 @@ fun SwipeRevealRow(
     controller: SwipeController,
     modifier: Modifier = Modifier,
     revealWidth: Dp = 64.dp,
+    gesturesEnabled: Boolean = true,
     revealAction: () -> Unit,
     revealButton: @Composable () -> Unit = {
         Box(
@@ -555,7 +556,9 @@ fun SwipeRevealRow(
             modifier = Modifier
                 .fillMaxWidth()
                 .graphicsLayer { translationX = offsetX }
-                .pointerInput(revealPx) {
+                .pointerInput(revealPx, gesturesEnabled) {
+                    // Selection mode turns reveals off; rows must not shift under the checkboxes.
+                    if (!gesturesEnabled) return@pointerInput
                     detectHorizontalDragGestures(
                         onDragStart = { settleJob?.cancel() },
                         onHorizontalDrag = { change, dragAmount ->

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

@@ -0,0 +1,42 @@
+/*
+ * 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.presentation
+
+import java.util.Locale
+
+/**
+ * Grid sets abbreviated the way operators read them: a grid is shortened to its
+ * last two characters while its field (first two characters) stays the same as
+ * the previous grid's; a field change is spelled out — "OL61/62" (same field)
+ * but "OM91/PM01" (a shared prefix would read as OM01, the wrong square).
+ * Used for the station grids a QSO was uploaded under (logbook rows and the
+ * radar log page) and for the opposite station's confirmed grid set.
+ */
+fun gridsLabel(grids: List<String>): String {
+    val clean = grids.map { it.trim().uppercase(Locale.US).take(4) }
+        .filter { it.length >= 4 }.distinct().sorted()
+    if (clean.isEmpty()) return ""
+    return buildString {
+        append(clean.first())
+        for (index in 1 until clean.size) {
+            val grid = clean[index]
+            if (grid.take(2) == clean[index - 1].take(2)) append('/').append(grid.takeLast(2))
+            else append('/').append(grid)
+        }
+    }
+}

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

@@ -0,0 +1,62 @@
+/*
+ * 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.presentation
+
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Text
+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.LoTWPositionWarning
+
+/**
+ * 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 LoTWPositionWarningDialog(
+    warning: LoTWPositionWarning,
+    onFixStation: () -> Unit,
+    onIgnore: () -> Unit
+) {
+    AlertDialog(
+        onDismissRequest = onIgnore,
+        shape = sheetDialogShape(),
+        containerColor = sheetDialogContainerColor(),
+        title = { SheetDialogTitle(stringResource(R.string.lotw_upload_grid_title)) },
+        text = {
+            Text(
+                text = stringResource(
+                    R.string.lotw_upload_grid_mismatch,
+                    warning.currentGrid,
+                    gridsLabel(warning.stationGrids)
+                ),
+                fontSize = 14.sp
+            )
+        },
+        confirmButton = {
+            TextButton(onClick = onFixStation) { Text(stringResource(R.string.lotw_upload_grid_fix)) }
+        },
+        dismissButton = {
+            TextButton(onClick = onIgnore) { Text(stringResource(R.string.lotw_upload_grid_ignore)) }
+        }
+    )
+}

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

@@ -197,6 +197,15 @@
     <string name="prefs_logbook_upload">上传</string>
     <string name="prefs_logbook_upload_title">上传到 LoTW</string>
     <string name="prefs_logbook_upload_confirm">确认上传</string>
+    <string name="prefs_logbook_resubmit">重传选中 (%1$d)</string>
+    <string name="prefs_logbook_selected">已选 %1$d 条</string>
+    <string name="prefs_logbook_select_hint">长按记录行可多选重传</string>
+    <string name="prefs_logbook_resubmit_note">已上传记录将按当前台址就地更新；已被奖项使用的旧网格可能被拒绝。</string>
+    <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">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$s</string>
     <string name="prefs_lotw_upload_not_configured">未配置 — 导入 TrustedQSL 证书后即可上传通联</string>
@@ -406,6 +415,9 @@
     <string name="qso_edit_comment">备注</string>
     <string name="qso_edit_save">保存</string>
     <string name="qso_edit_cancel">取消</string>
+    <string name="log_out_window_title">不在过境窗口</string>
+    <string name="log_out_window_message">当前时间不在该过境窗口内，将默认按过境中点 %1$s 录入；如需修改，请点击该条通联记录。</string>
+    <string name="log_out_window_confirm">录入</string>
     <string name="qso_edit_err_callsign">呼号不能为空</string>
     <string name="qso_edit_err_datetime">日期或时间格式不对 —— 应为 yyyy-MM-dd 与 HH:mm:ss（UTC）</string>
     <string name="qso_edit_err_frequency">频率格式不对 —— 请输入 MHz，例如 145.850</string>

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

@@ -226,6 +226,15 @@
     <string name="prefs_logbook_upload">Upload</string>
     <string name="prefs_logbook_upload_title">Upload to LoTW</string>
     <string name="prefs_logbook_upload_confirm">Upload</string>
+    <string name="prefs_logbook_resubmit">Resubmit (%1$d)</string>
+    <string name="prefs_logbook_selected">%1$d selected</string>
+    <string name="prefs_logbook_select_hint">Long-press a row to re-upload corrected records</string>
+    <string name="prefs_logbook_resubmit_note">Existing contacts will be updated in place — a grid already used for an award may be rejected.</string>
+    <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">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$s</string>
     <string name="prefs_lotw_upload_not_configured">Not configured — import your TrustedQSL certificate to upload QSOs</string>
@@ -434,6 +443,9 @@ Upstream: https://github.com/rt-bishop/Look4Sat</string>
     <string name="qso_edit_comment">Comment</string>
     <string name="qso_edit_save">Save</string>
     <string name="qso_edit_cancel">Cancel</string>
+    <string name="log_out_window_title">Outside pass window</string>
+    <string name="log_out_window_message">The current time is outside this pass window. The contact will be logged at the pass midpoint %1$s by default; tap the record afterwards to change the time if needed.</string>
+    <string name="log_out_window_confirm">Log it</string>
     <string name="qso_edit_err_callsign">Callsign is required</string>
     <string name="qso_edit_err_datetime">Invalid date/time — use yyyy-MM-dd and HH:mm:ss (UTC)</string>
     <string name="qso_edit_err_frequency">Invalid frequency — enter MHz, e.g. 145.850</string>

feature/cw/src/main/java/com/rtbishop/look4sat/feature/cw/CwSettingsDialog.kt

@@ -44,6 +44,9 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
+import com.rtbishop.look4sat.core.presentation.SheetDialogTitle
+import com.rtbishop.look4sat.core.presentation.sheetDialogContainerColor
+import com.rtbishop.look4sat.core.presentation.sheetDialogShape
 import com.ve3nea.morse_expert.MainActivity
 import kotlin.math.roundToInt
 
@@ -91,7 +94,9 @@ fun CwSettingsDialog(controller: MainActivity, onDismiss: () -> Unit) {
 
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text("CW Settings") },
+        shape = sheetDialogShape(),
+        containerColor = sheetDialogContainerColor(),
+        title = { SheetDialogTitle("CW Settings") },
         text = {
             Column(
                 modifier = Modifier

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapScreen.kt

@@ -93,10 +93,13 @@ import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.presentation.IconCard
 import com.rtbishop.look4sat.core.presentation.NextPassRow
 import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.SheetDialogTitle
 import com.rtbishop.look4sat.core.presentation.TimerRow
 import com.rtbishop.look4sat.core.presentation.TopBar
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import com.rtbishop.look4sat.core.presentation.layoutPadding
+import com.rtbishop.look4sat.core.presentation.sheetDialogContainerColor
+import com.rtbishop.look4sat.core.presentation.sheetDialogShape
 import org.osmdroid.tileprovider.MapTileProviderBasic
 import org.osmdroid.tileprovider.tilesource.OnlineTileSourceBase
 import org.osmdroid.tileprovider.tilesource.XYTileSource
@@ -676,7 +679,9 @@ private fun WorkedGridQsoDialog(
     if (showMarkInput) {
         androidx.compose.material3.AlertDialog(
             onDismissRequest = { showMarkInput = false },
-            title = { Text(stringResource(R.string.grid_mark_station)) },
+            shape = sheetDialogShape(),
+            containerColor = sheetDialogContainerColor(),
+            title = { SheetDialogTitle(stringResource(R.string.grid_mark_station)) },
             text = {
                 androidx.compose.material3.OutlinedTextField(
                     value = callInput,

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
@@ -40,6 +41,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardCapitalization
@@ -60,14 +62,18 @@ import com.rtbishop.look4sat.core.domain.utility.uplinkHz
 import com.rtbishop.look4sat.core.domain.utility.voiceRepeater
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.QsoEditDialog
+import com.rtbishop.look4sat.core.presentation.R
 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.LoTWPositionWarningDialog
 
 @Composable
 fun LogPage(
     uiState: RadarState,
     logViewModel: LogViewModel,
+    onFixGrid: (List<String>) -> Unit = {},
     modifier: Modifier = Modifier
 ) {
     val logUiState by logViewModel.uiState.collectAsStateWithLifecycle()
@@ -100,6 +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()
@@ -139,14 +151,28 @@ fun LogPage(
                     imeAction = ImeAction.Done
                 ),
                 keyboardActions = androidx.compose.foundation.text.KeyboardActions(onDone = {
-                    logViewModel.record(satName, mode, txHz, rxHz, logUiState.stationGrid)
+                    logViewModel.record(satName, mode, txHz, rxHz, logUiState.stationGrid, passWindow)
                 })
             )
             Button(
-                onClick = { logViewModel.record(satName, mode, txHz, rxHz, logUiState.stationGrid) },
+                onClick = { logViewModel.record(satName, mode, txHz, rxHz, logUiState.stationGrid, passWindow) },
                 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 ->
@@ -217,15 +243,29 @@ fun LogPage(
         )
     }
 
-    logUiState.preview?.let { preview ->
-        UploadPreviewDialog(
-            preview = preview,
-            busy = logUiState.busy,
-            onConfirm = logViewModel::confirmUpload,
-            onDismiss = logViewModel::dismissPreview
+    logUiState.uploadPositionWarning?.let { warning ->
+        LoTWPositionWarningDialog(
+            warning = warning,
+            onFixStation = {
+                logViewModel.abandonForGridFix()
+                onFixGrid(listOf(warning.currentGrid))
+            },
+            onIgnore = logViewModel::ignorePositionWarning
         )
     }
 
+    // The preview only opens once the position check is out of the way.
+    if (logUiState.uploadPositionWarning == null) {
+        logUiState.preview?.let { preview ->
+            UploadPreviewDialog(
+                preview = preview,
+                busy = logUiState.busy,
+                onConfirm = logViewModel::confirmUpload,
+                onDismiss = logViewModel::dismissPreview
+            )
+        }
+    }
+
     if (logUiState.message.isNotBlank()) {
         AlertDialog(
             onDismissRequest = logViewModel::clearMessage,
@@ -239,6 +279,34 @@ fun LogPage(
         )
     }
 
+    // Out-of-window notice: the clock is outside the current pass [aos, los], so the record
+    // would never show in the window-filtered list. Confirm first, then store it at the pass
+    // midpoint (there is always an edit dialog afterwards for the exact time).
+    logUiState.outOfWindowLog?.let { pending ->
+        val midpointText = remember(pending.midpointUtcMillis) {
+            java.text.SimpleDateFormat("HH:mm'Z'", java.util.Locale.US).apply {
+                timeZone = java.util.TimeZone.getTimeZone("UTC")
+            }.format(java.util.Date(pending.midpointUtcMillis))
+        }
+        AlertDialog(
+            onDismissRequest = logViewModel::dismissOutOfWindowLog,
+            shape = sheetDialogShape(),
+            containerColor = sheetDialogContainerColor(),
+            title = { SheetDialogTitle(stringResource(R.string.log_out_window_title)) },
+            text = { Text(stringResource(R.string.log_out_window_message, midpointText)) },
+            confirmButton = {
+                TextButton(onClick = logViewModel::confirmOutOfWindowLog) {
+                    Text(stringResource(R.string.log_out_window_confirm))
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = logViewModel::dismissOutOfWindowLog) {
+                    Text(stringResource(R.string.btn_cancel))
+                }
+            }
+        )
+    }
+
     editTarget?.let { target ->
         QsoEditDialog(
             record = target,
@@ -264,6 +332,8 @@ private fun LogRecordRow(
             timeZone = java.util.TimeZone.getTimeZone("UTC")
         }.format(java.util.Date(record.startUtcMillis))
     }
+    // Own station grid: the upload-stamped set, else the grid the QSO was logged under.
+    val ownGrids = gridsLabel(record.vuccGrids.ifEmpty { listOf(record.myGrid) })
     // 右划露出删除按钮（短信式）；整行点击不再删除。
     SwipeRevealRow(
         key = record.id.toString(),
@@ -289,6 +359,14 @@ private fun LogRecordRow(
                     maxLines = 1
                 )
                 Text(text = "  ${record.displayMode}", fontSize = 14.sp, maxLines = 1)
+                if (ownGrids.isNotBlank()) {
+                    Text(
+                        text = "  $ownGrids",
+                        fontSize = 14.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        maxLines = 1
+                    )
+                }
             }
             when {
                 record.lotwConfirmed -> Text("QSL", fontSize = 12.sp, color = MaterialTheme.colorScheme.primary, fontFamily = FontFamily.Monospace)

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

@@ -25,8 +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.LoTWUploadResult
+import com.rtbishop.look4sat.core.domain.repository.positionWarning
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -38,6 +40,23 @@ import java.util.Date
 import java.util.Locale
 import java.util.TimeZone
 
+/**
+ * A contact waiting for the operator to confirm logging while the clock is outside the
+ * current pass window (after LOS, before AOS, or against a pass card that is not the one
+ * being worked). Confirmed entries are stored at the pass midpoint — inside [aos, los] —
+ * so the window-filtered log page can show them; the exact time can be re-dated from the
+ * edit dialog afterwards.
+ */
+data class OutOfWindowLog(
+    val callsign: String,
+    val satName: String,
+    val mode: String,
+    val txHz: Long?,
+    val rxHz: Long?,
+    val myGrid: String,
+    val midpointUtcMillis: Long
+)
+
 data class LogUiState(
     val callsignInput: String = "",
     /** Current logbook mode for the selected satellite (FM/CW/SSB/FT4). */
@@ -49,10 +68,18 @@ 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 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,
-    val busy: Boolean = false
+    val busy: Boolean = false,
+    /** Out-of-window contact waiting for the operator's confirmation (null when closed). */
+    val outOfWindowLog: OutOfWindowLog? = null
 )
 
 class LogViewModel(
@@ -85,6 +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) =
@@ -101,19 +132,64 @@ class LogViewModel(
         settingsRepo.setSatelliteMode(catnum, mode)
     }
 
-    fun record(satName: String, mode: String, txHz: Long?, rxHz: Long?, myGrid: String) {
+    fun record(
+        satName: String,
+        mode: String,
+        txHz: Long?,
+        rxHz: Long?,
+        myGrid: String,
+        passWindow: ClosedRange<Long>?
+    ) {
         val call = _uiState.value.callsignInput.trim()
         if (call.isEmpty()) return
-        val normalizedMode = mode.ifBlank { "FM" }.uppercase(Locale.US)
         // Whole minutes (seconds zeroed): matches the edit dialog's HH:mm granularity and the
         // minute-resolution of LoTW reports, so re-saving an unchanged record never looks edited.
         val now = System.currentTimeMillis() / 60_000L * 60_000L
+        // Logging while the clock sits outside the current pass window (after LOS, before AOS,
+        // or against a pass card that is not the one being worked): the log page only shows
+        // records inside [aos, los], so a "now" timestamp could never appear there. Ask the
+        // operator first; the confirmed contact is stored at the pass midpoint (always inside
+        // the window) and can be re-dated later from the edit dialog.
+        if (passWindow != null && now !in passWindow) {
+            val midpoint = ((passWindow.start + passWindow.endInclusive) / 2L)
+                .let { it / 60_000L * 60_000L }
+                .coerceIn(passWindow.start, passWindow.endInclusive)
+            _uiState.update {
+                it.copy(outOfWindowLog = OutOfWindowLog(call, satName, mode, txHz, rxHz, myGrid, midpoint))
+            }
+            return
+        }
+        storeRecord(call, satName, mode, txHz, rxHz, myGrid, now)
+    }
+
+    /** The operator confirmed the out-of-window notice: store the contact at the pass midpoint. */
+    fun confirmOutOfWindowLog() {
+        val pending = _uiState.value.outOfWindowLog ?: return
+        storeRecord(
+            pending.callsign, pending.satName, pending.mode,
+            pending.txHz, pending.rxHz, pending.myGrid, pending.midpointUtcMillis
+        )
+        _uiState.update { it.copy(outOfWindowLog = null) }
+    }
+
+    fun dismissOutOfWindowLog() = _uiState.update { it.copy(outOfWindowLog = null) }
+
+    private fun storeRecord(
+        call: String,
+        satName: String,
+        mode: String,
+        txHz: Long?,
+        rxHz: Long?,
+        myGrid: String,
+        timeMillis: Long
+    ) {
+        val normalizedMode = mode.ifBlank { "FM" }.uppercase(Locale.US)
         // kHz granularity (3 decimals in MHz) — enough for operating and for the ADIF export.
         val tx = txHz?.let { (it + 500L) / 1000L * 1000L }
         val rx = rxHz?.let { (it + 500L) / 1000L * 1000L }
         val record = QsoRecord(
-            startUtcMillis = now,
-            endUtcMillis = now,
+            startUtcMillis = timeMillis,
+            endUtcMillis = timeMillis,
             theirCallsign = call,
             myCallsign = _uiState.value.certificateCallsign,
             myGrid = myGrid.take(6).uppercase(Locale.US),
@@ -200,7 +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) }
+                _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) {
@@ -215,8 +297,9 @@ class LogViewModel(
             _uiState.update { it.copy(busy = true) }
             val result = lotwUploadRepository.upload(preview.id)
             if (result is LoTWUploadResult.Accepted && lastUploadedIds.isNotEmpty()) {
-                // Mark the submitted QSOs as uploaded (distinct from confirmed).
-                qsoRepository.markUploaded(lastUploadedIds)
+                // Mark the submitted QSOs as uploaded (distinct from confirmed) and stamp
+                // the station grids this batch went out under.
+                qsoRepository.markUploaded(lastUploadedIds, preview.grids)
                 lastUploadedIds = emptyList()
             }
             val msg = when (result) {
@@ -231,6 +314,34 @@ class LogViewModel(
 
     fun dismissPreview() = _uiState.update { it.copy(preview = 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(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 = "") }
 
     companion object {

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

@@ -175,7 +175,7 @@ internal fun radarFillSizes(maxWidth: Dp, maxHeight: Dp): RadarFillSizes {
 }
 
 @Composable
-fun RadarDestination(navigateUp: () -> Unit) {
+fun RadarDestination(navigateUp: () -> Unit, onOpenLoTWStation: () -> Unit = {}) {
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val viewModel: RadarViewModel = viewModel(factory = RadarViewModel.factory(container))
@@ -216,9 +216,15 @@ fun RadarDestination(navigateUp: () -> Unit) {
         viewModel.onAction(RadarAction.SstvPermissionResult(granted))
         viewModel.onAction(RadarAction.CwPermissionResult(granted))
     }
+    // Grid-check "fix it" jump from the log page: hand the affected records' grids to the
+    // station-location page as its prefill (mirrors the Grid Finder's hand-off).
+    val openLoTWStationForGridFix: (List<String>) -> Unit = { grids ->
+        if (grids.isNotEmpty()) container.setPendingLoTWStationGrid(grids.joinToString(","))
+        onOpenLoTWStation()
+    }
     RadarScreen(uiState, viewModel::onAction, navigateUpAndClearMutual, mutualData, logViewModel, requestMicPermission = {
         permissionLauncher.launch(Manifest.permission.RECORD_AUDIO)
-    })
+    }, onFixGrid = openLoTWStationForGridFix)
 }
 
 @Composable
@@ -228,7 +234,8 @@ private fun RadarScreen(
     navigateUp: () -> Unit,
     mutualData: MutualPassData,
     logViewModel: LogViewModel,
-    requestMicPermission: () -> Unit
+    requestMicPermission: () -> Unit,
+    onFixGrid: (List<String>) -> Unit
 ) {
     val upcomingPass = uiState.currentPass ?: getDefaultPass()
     // 日程功能: 把当前过境写入系统日历(原仓库的 addToCalendar, ic_calendar 按钮)
@@ -308,16 +315,17 @@ private fun RadarScreen(
                         onAction = onAction,
                         logViewModel = logViewModel,
                         requestMicPermission = requestMicPermission,
+                        onFixGrid = onFixGrid,
                         modifier = Modifier.weight(1f)
                     )
                 } else {
                     RadarCard(uiState, trackB, trackBPosition, Modifier.weight(1f))
-                    PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.weight(1f))
+                    PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.weight(1f), onFixGrid = onFixGrid)
                 }
             } else {
                 Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
                     RadarCard(uiState, trackB, trackBPosition, Modifier.weight(1f))
-                    PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.weight(1f))
+                    PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.weight(1f), onFixGrid = onFixGrid)
                 }
             }
         }
@@ -338,6 +346,7 @@ private fun RadarFillArea(
     onAction: (RadarAction) -> Unit,
     logViewModel: LogViewModel,
     requestMicPermission: () -> Unit,
+    onFixGrid: (List<String>) -> Unit,
     modifier: Modifier = Modifier
 ) {
     BoxWithConstraints(modifier = modifier.fillMaxSize()) {
@@ -351,7 +360,7 @@ private fun RadarFillArea(
                 verticalArrangement = Arrangement.spacedBy(ROW_GAP)
             ) {
                 RadarCard(uiState, trackB, trackBPosition, Modifier.height(sizes.radarSide).fillMaxWidth())
-                PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.height(sizes.pagerSpace))
+                PagerCard(uiState, onAction, logViewModel, requestMicPermission, Modifier.height(sizes.pagerSpace), onFixGrid = onFixGrid)
             }
         } else {
             Box(modifier = Modifier.fillMaxSize()) {
@@ -361,6 +370,7 @@ private fun RadarFillArea(
                     onAction = onAction,
                     logViewModel = logViewModel,
                     requestMicPermission = requestMicPermission,
+                    onFixGrid = onFixGrid,
                     panelHeight = pagerPanelHeight,
                     modifier = Modifier.align(Alignment.BottomCenter)
                 )
@@ -380,6 +390,7 @@ private fun CompactPagerOverlay(
     onAction: (RadarAction) -> Unit,
     logViewModel: LogViewModel,
     requestMicPermission: () -> Unit,
+    onFixGrid: (List<String>) -> Unit,
     panelHeight: Dp,
     modifier: Modifier = Modifier
 ) {
@@ -420,6 +431,7 @@ private fun CompactPagerOverlay(
             onAction = onAction,
             logViewModel = logViewModel,
             requestMicPermission = requestMicPermission,
+            onFixGrid = onFixGrid,
             modifier = modifier
                 .fillMaxWidth()
                 .height(panelHeight),
@@ -453,7 +465,8 @@ private fun PagerCard(
     requestMicPermission: () -> Unit,
     modifier: Modifier = Modifier,
     startPage: RadarPage? = null,
-    onCollapse: (() -> Unit)? = null
+    onCollapse: (() -> Unit)? = null,
+    onFixGrid: (List<String>) -> Unit = {}
 ) {
     val pages = rememberRadarPages(uiState)
     val pagerState = rememberPagerState(
@@ -515,7 +528,8 @@ private fun PagerCard(
                     )
                     RadarPage.Log -> LogPage(
                         uiState = uiState,
-                        logViewModel = logViewModel
+                        logViewModel = logViewModel,
+                        onFixGrid = onFixGrid
                     )
                     RadarPage.Sstv -> SstvPage(
                         sstv = uiState.sstv,

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

@@ -9,7 +9,9 @@
  */
 package com.rtbishop.look4sat.feature.settings
 
+import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -26,6 +28,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -33,6 +36,8 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.hapticfeedback.HapticFeedbackType
+import androidx.compose.ui.platform.LocalHapticFeedback
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextOverflow
@@ -47,6 +52,8 @@ import com.rtbishop.look4sat.core.presentation.QsoEditDialog
 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.LoTWPositionWarningDialog
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.SharedDialog
 import com.rtbishop.look4sat.core.presentation.SwipeController
@@ -82,24 +89,39 @@ fun LogbookDialog(
     uploadBusy: Boolean,
     uploadMessage: String,
     preview: com.rtbishop.look4sat.core.domain.repository.LoTWUploadPreview?,
+    positionWarning: com.rtbishop.look4sat.core.domain.repository.LoTWPositionWarning? = null,
     onDismiss: () -> Unit,
     onDelete: (Long) -> Unit,
     onEdit: (QsoRecord) -> Unit,
     onUpload: () -> Unit,
     onConfirmUpload: () -> Unit,
     onDismissPreview: () -> Unit,
-    onDismissMessage: () -> Unit
+    onDismissMessage: () -> Unit,
+    onIgnorePositionWarning: () -> Unit = {},
+    onFixGrid: (List<String>) -> Unit = {},
+    selectionMode: Boolean = false,
+    selectedIds: Set<Long> = emptySet(),
+    onStartSelection: (Long) -> Unit = {},
+    onToggleSelection: (Long) -> Unit = {},
+    onExitSelection: () -> Unit = {},
+    onResubmitSelected: () -> Unit = {}
 ) {
     val swipeController = rememberSwipeController()
+    // Entering selection mode closes any row left swiped open — reveals are off there.
+    LaunchedEffect(selectionMode) { if (selectionMode) swipeController.close() }
     // Record currently open in the edit dialog (null when closed).
     var editTarget by remember { mutableStateOf<QsoRecord?>(null) }
     SharedDialog(
         title = stringResource(R.string.prefs_logbook_title),
         onDismissRequest = onDismiss,
-        onCancel = onDismiss,
-        onAccept = onUpload,
-        acceptText = stringResource(R.string.prefs_logbook_upload),
-        acceptEnabled = !uploadBusy
+        onCancel = if (selectionMode) onExitSelection else onDismiss,
+        onAccept = if (selectionMode) onResubmitSelected else onUpload,
+        acceptText = if (selectionMode) {
+            stringResource(R.string.prefs_logbook_resubmit, selectedIds.size)
+        } else {
+            stringResource(R.string.prefs_logbook_upload)
+        },
+        acceptEnabled = if (selectionMode) selectedIds.isNotEmpty() && !uploadBusy else !uploadBusy
     ) {
         Column(
             modifier = Modifier.fillMaxWidth().padding(horizontal = LocalSpacing.current.large),
@@ -108,6 +130,21 @@ fun LogbookDialog(
             if (records.isEmpty()) {
                 Text(stringResource(R.string.prefs_logbook_empty), fontSize = 14.sp)
             } else {
+                // Selection mode shows the checked count; otherwise a hint that long-press
+                // opens it (the path to resubmitting already-uploaded records).
+                if (selectionMode) {
+                    Text(
+                        text = stringResource(R.string.prefs_logbook_selected, selectedIds.size),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.primary
+                    )
+                } else {
+                    Text(
+                        text = stringResource(R.string.prefs_logbook_select_hint),
+                        fontSize = 11.sp,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
                 LazyColumn(
                     modifier = Modifier.fillMaxWidth().heightIn(max = 420.dp),
                     verticalArrangement = Arrangement.spacedBy(2.dp)
@@ -115,9 +152,16 @@ fun LogbookDialog(
                     items(records, key = { it.id }) { record ->
                         LogbookRow(
                             record = record,
+                            selectionMode = selectionMode,
+                            selected = record.id in selectedIds,
                             swipeController = swipeController,
                             onDelete = { onDelete(record.id) },
-                            onClick = { editTarget = record }
+                            onClick = {
+                                if (selectionMode) onToggleSelection(record.id) else editTarget = record
+                            },
+                            onLongClick = {
+                                if (selectionMode) onToggleSelection(record.id) else onStartSelection(record.id)
+                            }
                         )
                     }
                 }
@@ -125,7 +169,15 @@ fun LogbookDialog(
         }
     }
 
-    if (preview != null) {
+    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(
             preview = preview,
             busy = uploadBusy,
@@ -194,6 +246,15 @@ private fun LogbookUploadPreviewDialog(
                     }
                     Text(parts.joinToString(" · "), fontSize = 12.sp, color = MaterialTheme.colorScheme.error)
                 }
+                if (preview.resubmit) {
+                    // LoTW treats an identical contact as an update, except grids already
+                    // locked in by award credits — say so before the operator commits.
+                    Text(
+                        stringResource(R.string.prefs_logbook_resubmit_note),
+                        fontSize = 12.sp,
+                        color = MaterialTheme.colorScheme.primary
+                    )
+                }
                 Text(preview.contacts.joinToString("\n") { it }, fontSize = 12.sp, maxLines = 8)
             }
         },
@@ -208,12 +269,19 @@ private fun LogbookUploadPreviewDialog(
     )
 }
 
+/** Confirmed-grid colour: the map's worked-grid green, so "confirmed" reads the same everywhere. */
+private val ConfirmedGreen = Color(0xFF4CD964)
+
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 private fun LogbookRow(
     record: QsoRecord,
+    selectionMode: Boolean,
+    selected: Boolean,
     swipeController: SwipeController,
     onDelete: () -> Unit,
-    onClick: () -> Unit
+    onClick: () -> Unit,
+    onLongClick: () -> Unit
 ) {
     val time = remember(record.startUtcMillis) {
         SimpleDateFormat("MM-dd HH:mm'Z'", Locale.US).apply {
@@ -222,11 +290,13 @@ private fun LogbookRow(
     }
     val satShort = record.satelliteName.substringBefore('(').trim()
     val band = record.band.ifBlank { frequencyBand(record.txFrequencyHz) }
-    // 右划露出删除按钮（短信式）；整行点击不再删除。
+    val haptics = LocalHapticFeedback.current
+    // 右划露出删除按钮（短信式）；整行点击不再删除。选择模式下右划禁用、长按进入多选。
     SwipeRevealRow(
         key = record.id.toString(),
         controller = swipeController,
         revealAction = onDelete,
+        gesturesEnabled = !selectionMode,
         modifier = Modifier.fillMaxWidth()
     ) {
         // Row style mirrors the worked-grid QSO details on the map: callsign in
@@ -234,10 +304,30 @@ private fun LogbookRow(
         Column(
             modifier = Modifier
                 .fillMaxWidth()
-                .clickable { onClick() }
+                .combinedClickable(
+                    onClick = onClick,
+                    onLongClick = {
+                        haptics.performHapticFeedback(HapticFeedbackType.LongPress)
+                        onLongClick()
+                    }
+                )
                 .padding(horizontal = 4.dp, vertical = 8.dp)
         ) {
             Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.fillMaxWidth()) {
+                // Checkbox slot: only while picking records for a resubmit.
+                if (selectionMode) {
+                    Text(
+                        text = if (selected) "✓" else "○",
+                        fontSize = 15.sp,
+                        fontFamily = FontFamily.Monospace,
+                        color = if (selected) {
+                            MaterialTheme.colorScheme.primary
+                        } else {
+                            MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f)
+                        },
+                        modifier = Modifier.padding(end = 6.dp)
+                    )
+                }
                 Text(
                     text = record.theirCallsign,
                     style = MaterialTheme.typography.titleMedium,
@@ -247,14 +337,30 @@ private fun LogbookRow(
                     overflow = TextOverflow.Ellipsis,
                     modifier = Modifier.weight(1f)
                 )
+                // Confirmed contacts show the opposite station's grid set from the LoTW
+                // report (single or multi-grid, abbreviated) in the worked-grid green
+                // instead of the word QSL; without any grid the QSL text stays.
                 if (record.lotwConfirmed) {
-                    Text(text = "QSL", fontSize = 13.sp, color = MaterialTheme.colorScheme.primary, fontFamily = FontFamily.Monospace)
+                    val oppositeGrids = gridsLabel(
+                        record.theirVuccGrids.ifEmpty { listOf(record.theirGrid) }
+                    )
+                    if (oppositeGrids.isNotEmpty()) {
+                        Text(text = oppositeGrids, fontSize = 13.sp, color = ConfirmedGreen, fontFamily = FontFamily.Monospace)
+                    } else {
+                        Text(text = "QSL", fontSize = 13.sp, color = MaterialTheme.colorScheme.primary, fontFamily = FontFamily.Monospace)
+                    }
                 } else if (record.lotwUploaded) {
                     Text(text = "UP", fontSize = 13.sp, color = MaterialTheme.colorScheme.primary, fontFamily = FontFamily.Monospace)
                 }
             }
             Text(
-                text = listOf(satShort, record.displayMode, band, time).filter { it.isNotBlank() }.joinToString(" · "),
+                // Own station grid: the set the upload was stamped with, or — for rows from
+                // before the stamp existed — the grid the QSO was logged under, so every
+                // stored contact shows where the operator was.
+                text = listOf(
+                    satShort, record.displayMode, band, time,
+                    gridsLabel(record.vuccGrids.ifEmpty { listOf(record.myGrid) })
+                ).filter { it.isNotBlank() }.joinToString(" · "),
                 style = MaterialTheme.typography.bodySmall,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                 maxLines = 1,

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

@@ -94,14 +94,29 @@ fun SettingsDestination(onOpenGridFinder: () -> Unit = {}) {
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val viewModel: SettingsViewModel = viewModel(factory = SettingsViewModel.factory(container, context))
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
-    SettingsScreen(uiState, viewModel::onAction, onOpenGridFinder)
+    // Station-grid prefill for the "fix it" jump from the logbook grid check (single-use,
+    // mirrors the Grid Finder's "Set as LoTW station" hand-off).
+    val pendingStationGrid by container.pendingLoTWStationGrid.collectAsStateWithLifecycle()
+    SettingsScreen(
+        uiState = uiState,
+        onAction = viewModel::onAction,
+        onOpenGridFinder = onOpenGridFinder,
+        pendingStationGrid = pendingStationGrid.orEmpty(),
+        onFixStationGrid = { grids ->
+            if (grids.isNotEmpty()) container.setPendingLoTWStationGrid(grids.joinToString(","))
+        },
+        onClearStationGridPrefill = { container.setPendingLoTWStationGrid(null) }
+    )
 }
 
 @Composable
 private fun SettingsScreen(
     uiState: SettingsState,
     onAction: (SettingsAction) -> Unit,
-    onOpenGridFinder: () -> Unit
+    onOpenGridFinder: () -> Unit,
+    pendingStationGrid: String = "",
+    onFixStationGrid: (List<String>) -> Unit = {},
+    onClearStationGridPrefill: () -> Unit = {}
 ) {
     var showUpdateChecker by rememberSaveable { mutableStateOf(false) }
     var showMapSettings by rememberSaveable { mutableStateOf(false) }
@@ -277,13 +292,33 @@ private fun SettingsScreen(
             uploadBusy = uiState.logbookUploadBusy,
             uploadMessage = uiState.logbookUploadMessage,
             preview = uiState.logbookPreview,
-            onDismiss = { dialogs.logbook = false },
+            positionWarning = uiState.logbookPositionWarning,
+            onDismiss = {
+                // Leaving the logbook resets the resubmit selection: re-entering starts
+                // clean — the operator long-presses again to pick records.
+                onAction(SettingsAction.ExitLogbookSelection)
+                dialogs.logbook = false
+            },
             onDelete = { onAction(SettingsAction.DeleteLogbookRecord(it)) },
             onEdit = { onAction(SettingsAction.UpdateLogbookRecord(it)) },
             onUpload = { onAction(SettingsAction.PrepareLogbookUpload) },
             onConfirmUpload = { onAction(SettingsAction.ConfirmLogbookUpload) },
             onDismissPreview = { onAction(SettingsAction.DismissLogbookPreview) },
-            onDismissMessage = { onAction(SettingsAction.ClearLogbookMessage) }
+            onDismissMessage = { onAction(SettingsAction.ClearLogbookMessage) },
+            onIgnorePositionWarning = { onAction(SettingsAction.IgnoreLogbookPositionWarning) },
+            onFixGrid = { grids ->
+                onAction(SettingsAction.AbandonLogbookForGridFix)
+                onAction(SettingsAction.ExitLogbookSelection)
+                dialogs.logbook = false
+                onFixStationGrid(grids)
+                dialogs.lotwUpload = true
+            },
+            selectionMode = uiState.logbookSelectionMode,
+            selectedIds = uiState.logbookSelectedIds,
+            onStartSelection = { onAction(SettingsAction.StartLogbookSelection(it)) },
+            onToggleSelection = { onAction(SettingsAction.ToggleLogbookSelection(it)) },
+            onExitSelection = { onAction(SettingsAction.ExitLogbookSelection) },
+            onResubmitSelected = { onAction(SettingsAction.ResubmitSelectedLogbook) }
         )
     }
     if (dialogs.lotwUpload) {
@@ -294,7 +329,11 @@ private fun SettingsScreen(
             busy = uiState.lotwUploadBusy,
             error = uiState.lotwUploadError,
             errorDetail = uiState.lotwUploadErrorDetail,
-            onDismiss = { dialogs.lotwUpload = false },
+            initialGrid = pendingStationGrid,
+            onDismiss = {
+                dialogs.lotwUpload = false
+                onClearStationGridPrefill()
+            },
             onImport = { bytes, password -> onAction(SettingsAction.ImportLoTWCertificate(bytes, password)) },
             onRemove = { onAction(SettingsAction.RemoveLoTWCertificate) },
             onSaveStation = { onAction(SettingsAction.SaveLoTWStation(it)) }

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

@@ -85,9 +85,16 @@ 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 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 = "",
+    /** Logbook multi-select mode (entered by long-pressing a row); checked records can be
+     *  re-uploaded so a corrected station location updates them on LoTW (resubmit). */
+    val logbookSelectionMode: Boolean = false,
+    val logbookSelectedIds: Set<Long> = emptySet(),
     /** 指南针校准精度等级 (校准对话框进度条). */
     val compassAccuracy: CompassAccuracy = CompassAccuracy.UNRELIABLE,
     /** 校正后航向(度, 含磁偏角+手动偏置), 校准对话框实时显示. */
@@ -160,6 +167,16 @@ sealed interface SettingsAction {
     data object PrepareLogbookUpload : SettingsAction
     data object ConfirmLogbookUpload : SettingsAction
     data object DismissLogbookPreview : 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. */
+    data class StartLogbookSelection(val id: Long) : SettingsAction
+    data class ToggleLogbookSelection(val id: Long) : SettingsAction
+    data object ExitLogbookSelection : SettingsAction
+    /** Re-upload the checked records — uploaded/confirmed rows included (resubmit). */
+    data object ResubmitSelectedLogbook : SettingsAction
     data object ClearLogbookMessage : SettingsAction
 
     // LoTW upload configuration (certificate + station)

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

@@ -34,10 +34,13 @@ 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
+import com.rtbishop.look4sat.core.domain.logbook.resubmitCandidates
 import com.rtbishop.look4sat.core.domain.logbook.toConfirmedRecord
+import com.rtbishop.look4sat.core.domain.logbook.unavailableUploadSummary
 import com.rtbishop.look4sat.core.presentation.R
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -233,6 +236,12 @@ class SettingsViewModel(
             SettingsAction.PrepareLogbookUpload -> prepareLogbookUpload()
             SettingsAction.ConfirmLogbookUpload -> confirmLogbookUpload()
             SettingsAction.DismissLogbookPreview -> dismissLogbookPreview()
+            SettingsAction.IgnoreLogbookPositionWarning -> ignoreLogbookPositionWarning()
+            SettingsAction.AbandonLogbookForGridFix -> abandonLogbookForGridFix()
+            is SettingsAction.StartLogbookSelection -> startLogbookSelection(action.id)
+            is SettingsAction.ToggleLogbookSelection -> toggleLogbookSelection(action.id)
+            SettingsAction.ExitLogbookSelection -> exitLogbookSelection()
+            SettingsAction.ResubmitSelectedLogbook -> resubmitSelectedLogbook()
             SettingsAction.ClearLogbookMessage -> clearLogbookMessage()
             // LoTW upload configuration
             SettingsAction.LoadLoTWUploadStatus -> loadLoTWUploadStatus()
@@ -396,7 +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) }
+                _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) {
@@ -410,8 +425,9 @@ class SettingsViewModel(
         viewModelScope.launch {
             _uiState.update { it.copy(logbookUploadBusy = true) }
             val result = lotwUploadRepository.upload(preview.id)
-            if (result is com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult.Accepted && lastLogbookUploadIds.isNotEmpty()) {
-                qsoRepository.markUploaded(lastLogbookUploadIds)
+            val accepted = result is com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult.Accepted
+            if (accepted && lastLogbookUploadIds.isNotEmpty()) {
+                qsoRepository.markUploaded(lastLogbookUploadIds, preview.grids)
                 lastLogbookUploadIds = emptyList()
             }
             val msg = when (result) {
@@ -420,12 +436,87 @@ class SettingsViewModel(
                 com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult.Unknown -> "Unknown result — will not auto-retry"
                 com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult.ExpiredPreview -> "Preview expired — tap upload again"
             }
-            _uiState.update { it.copy(logbookUploadBusy = false, logbookPreview = null, logbookUploadMessage = msg) }
+            _uiState.update {
+                it.copy(
+                    logbookUploadBusy = false,
+                    logbookPreview = null,
+                    logbookUploadMessage = msg,
+                    // An accepted resubmit is done — drop the checks; a failed one keeps
+                    // them so retrying stays one tap away.
+                    logbookSelectionMode = if (accepted) false else it.logbookSelectionMode,
+                    logbookSelectedIds = if (accepted) emptySet() else it.logbookSelectedIds
+                )
+            }
         }
     }
 
     private fun dismissLogbookPreview() = _uiState.update { it.copy(logbookPreview = 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(logbookPositionWarning = null, logbookPreview = null) }
+    }
+
+    /** Long-press entry: selection mode with the pressed record checked. */
+    private fun startLogbookSelection(id: Long) = _uiState.update {
+        it.copy(logbookSelectionMode = true, logbookSelectedIds = setOf(id))
+    }
+
+    private fun toggleLogbookSelection(id: Long) = _uiState.update {
+        val selection = it.logbookSelectedIds.toMutableSet().apply { if (!add(id)) remove(id) }
+        it.copy(logbookSelectedIds = selection)
+    }
+
+    private fun exitLogbookSelection() = _uiState.update {
+        it.copy(logbookSelectionMode = false, logbookSelectedIds = emptySet())
+    }
+
+    /**
+     * Re-upload the checked records — already-uploaded and confirmed rows included — so a
+     * corrected station location reaches LoTW and the server updates the existing contacts.
+     * The rest is the normal prepare → preview → upload cycle, resubmit flag included.
+     */
+    private fun resubmitSelectedLogbook() {
+        if (_uiState.value.logbookUploadBusy) return
+        viewModelScope.launch {
+            _uiState.update { it.copy(logbookUploadBusy = true, logbookUploadMessage = "") }
+            try {
+                val selected = resubmitCandidates(qsoRepository.records.first(), _uiState.value.logbookSelectedIds)
+                if (selected.isEmpty()) {
+                    _uiState.update { it.copy(logbookUploadBusy = false, logbookUploadMessage = "No complete QSOs in the selection") }
+                    return@launch
+                }
+                val preview = lotwUploadRepository.prepare(selected, true)
+                if (preview.count == 0) {
+                    // Every checked record proved un-signable — say why instead of opening
+                    // a dead preview whose POST could only expire.
+                    val message = unavailableUploadSummary(
+                        preview.unavailableSkipped, preview.unavailableReasons, duplicates = preview.duplicateSkipped
+                    ).ifBlank { "No QSOs to resubmit" }
+                    _uiState.update { it.copy(logbookUploadBusy = false, logbookUploadMessage = message) }
+                    return@launch
+                }
+                lastLogbookUploadIds = preview.submittedIds
+                _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) {
+                _uiState.update { it.copy(logbookUploadBusy = false, logbookUploadMessage = "Upload failed") }
+            }
+        }
+    }
+
     private fun clearLogbookMessage() = _uiState.update { it.copy(logbookUploadMessage = "") }
 
     private fun loadLoTWUploadStatus() {

feature/status/src/main/java/com/rtbishop/look4sat/feature/status/SatStatusScreen.kt

@@ -81,7 +81,10 @@ import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.InfoDialog
 import com.rtbishop.look4sat.core.presentation.R
+import com.rtbishop.look4sat.core.presentation.SheetDialogTitle
 import com.rtbishop.look4sat.core.presentation.layoutPadding
+import com.rtbishop.look4sat.core.presentation.sheetDialogContainerColor
+import com.rtbishop.look4sat.core.presentation.sheetDialogShape
 import java.text.SimpleDateFormat
 import java.util.Calendar
 import java.util.Date
@@ -591,7 +594,9 @@ private fun AmSatUploadConfirmDialog(
     val grid = upload.gridSquare.ifBlank { stringResource(R.string.amsat_upload_grid_none) }
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.amsat_upload_confirm_title)) },
+        shape = sheetDialogShape(),
+        containerColor = sheetDialogContainerColor(),
+        title = { SheetDialogTitle(stringResource(R.string.amsat_upload_confirm_title)) },
         text = {
             Text(
                 text = stringResource(

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "549"
+appVersionCode = "555"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.8-ba7opf.2.4"
+appVersionName = "4.4.8-ba7opf.3"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry