chore: bump version to 4.4.7-ba7opf.3 (versionCode 473)

WAZ/DXCC award rings are stored with the closing edge implicit (the renderer
close()s single-segment rings). Rings that straddle ±180° are split into
multiple segments, and multi-segment rings must not be close()d (each close()
would draw a spurious chord across the map), so the implicit closing edge
was never drawn -> the shared boundary between WAZ zones 31/32 (165E,-8 ->
180,-12), and the closing edges of Russia's main ring / Fiji / Russia's
Chukotka tip in DXCC, stayed open.

Fix: store every ring explicitly closed (append first point). splitRingAt
Antimeridian then cuts the closing edge at ±180 exactly like any other edge,
so each segment ends on the correct side and the boundary lines render.

README.md

@@ -6,11 +6,15 @@
 
 ## 本仓库特色功能
 
+- **网格地图模式（Grid Mode）** — 地图页内置 VUCC 网格覆盖图：已通联网格绿色填充、漫游网格蓝色 45° 斜纹（疏朗半透明样式）、当前所在方格淡黄加粗框；点击已通联网格弹出该网格内通联明细弹窗；进入网格模式默认 VUCC 视图
+- **奖状边界模式（Award Boundaries）** — 在网格地图上叠加 DXCC / WAPC / WAJA / WAZ / WAS 国界·省界·分区边界，已确认区域绿色填充
+- **LoTW 网格同步** — 直连 ARRL Logbook（账号密码验证）下载确认报告，worked / roamed 网格自动更新（兼容任意字段顺序的 ADIF 解析）；同步失败按凭据错误/限流/超时分类提示
 - **双站过境匹配（Mutual Pass）** — 输入友台经纬度/网格，筛选双方同时可见的卫星过境，在地图上同时显示双方仰角曲线和地面轨迹，支持一键跳转雷达页查看详情
 - **线性卫星转发器频率计算器** — 在雷达页的 Calculator 标签页中，支持 TX/RX 双向多普勒频率计算，以及下行频率偏移（offset）输入，方便操作带偏移的线性卫星
-- **CW 解码器** — 集成 Morse Expert 解码引擎，支持瀑布图、实时解码文本
-- **Passband 模式** — 支持通过位置滑块（Passband）自动计算 TX/RX 频率，避免切换时跳变
-- **AMSAT 状态页** — 实时查看卫星的业余无线电转发器状态（开启/关闭/待机），支持 72 小时历史记录回放
+- **CW 解码器** — 集成 Morse Expert 解码引擎，支持瀑布图、实时解码文本（arm64 + armeabi-v7a 双架构）
+- **AMSAT 状态页** — 实时查看卫星的业余无线电转发器状态（开启/关闭/待机），支持 72 小时历史记录回放，启动时预取缓存
+- **应用内更新检查** — 设置页一键检查 GitHub 最新 Release，展示版本说明并直接下载安装
+- **自定义 TLE 数据源** — 可添加自定义 TLE/Celestrak CSV 数据源，长按拖拽排序，数据源启停开关与 HTTP 状态码显示
 - **中文界面优化** — 翻译修正、UI 布局调整，系统语言自动切换
 
 ## 上游仓库

app/build.gradle.kts

@@ -18,7 +18,12 @@ android {
     namespace = libs.versions.packageName.get()
     defaultConfig {
         applicationId = "cn.ba7opf.look4sat"
-        ndk { abiFilters.add("armeabi-v7a") }
+        // CW decoder ships for both ABIs (see feature/cw jniLibs); the APK must
+        // not be pinned to 32-bit only or 64-bit devices fall back to ARM32.
+        ndk {
+            abiFilters.add("armeabi-v7a")
+            abiFilters.add("arm64-v8a")
+        }
     }
     signingConfigs {
         create("release") {

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

@@ -51,7 +51,6 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
@@ -94,16 +93,11 @@ import com.rtbishop.look4sat.feature.status.SatStatusDestination
 fun NavRoot(deeplink: String? = null) {
     val rootBackStack = rememberNavBackStack(Screen.Passes)
     val deeplinkResolver = DeeplinkResolver()
-    var openMapRequest by remember { mutableIntStateOf(0) }
     LaunchedEffect(deeplink) {
         deeplink?.let { rootBackStack.add(deeplinkResolver.resolve(it)) }
     }
     val navigateBack: () -> Unit = { rootBackStack.removeLastOrNull() }
     val navigateToRadar: () -> Unit = { rootBackStack.add(RadarDestination) }
-    val navigateToMap: () -> Unit = {
-        while (rootBackStack.size > 1) rootBackStack.removeAt(rootBackStack.size - 1)
-        openMapRequest += 1
-    }
     // Incoming screen slides in from the right, outgoing drifts left at 1/3 speed (API35+ style)
     val pushTransition = slideInHorizontally(tween(300)) { it } togetherWith
         slideOutHorizontally(tween(300)) { -it / 3 }
@@ -124,9 +118,7 @@ fun NavRoot(deeplink: String? = null) {
         entryProvider = entryProvider {
             entry<Screen.Passes> {
                 MainScreen(
-                    navigateToRadar = navigateToRadar,
-                    openMapRequest = openMapRequest,
-                    onOpenMapRequestHandled = { openMapRequest = 0 }
+                    navigateToRadar = navigateToRadar
                 )
             }
             entry<RadarDestination> {
@@ -134,7 +126,7 @@ fun NavRoot(deeplink: String? = null) {
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.background
                 ) {
-                    RadarDestination(navigateUp = navigateBack, navigateToMap = navigateToMap)
+                    RadarDestination(navigateUp = navigateBack)
                 }
             }
         }
@@ -143,25 +135,16 @@ fun NavRoot(deeplink: String? = null) {
 
 @Composable
 fun MainScreen(
-    navigateToRadar: () -> Unit = {},
-    openMapRequest: Int = 0,
-    onOpenMapRequestHandled: () -> Unit = {}
+    navigateToRadar: () -> Unit = {}
 ) {
     val backStack = rememberNavBackStack(Screen.Passes)
     val currentKey = backStack.lastOrNull()
     val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
-    val navigateToMap: () -> Unit = {
-        while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
-        backStack.add(Screen.Map)
-    }
-    LaunchedEffect(openMapRequest) {
-        if (openMapRequest > 0) {
-            navigateToMap()
-            onOpenMapRequestHandled()
-        }
-    }
     val fadeTransition = fadeIn(animationSpec = tween(350)) togetherWith fadeOut(animationSpec = tween(350))
-    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.AMSAT, Screen.Mutual, Screen.Settings)
+    // Map sits at position 4 from the left, matching the upstream nav order
+    // (Satellites, Passes, AMSAT/Status, Map, ...), with the fork's Mutual tab
+    // appended before Settings.
+    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.AMSAT, Screen.Map, Screen.Mutual, Screen.Settings)
 
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
@@ -185,7 +168,7 @@ fun MainScreen(
                     val isSelected = when (currentKey) {
                         is Screen.Satellites -> screen is Screen.Satellites
                         is Screen.Passes -> screen is Screen.Passes
-                        is Screen.Map -> screen is Screen.Passes
+                        is Screen.Map -> screen is Screen.Map
                         is Screen.AMSAT -> screen is Screen.AMSAT
                         is Screen.Mutual -> screen is Screen.Mutual
                         is Screen.Settings -> screen is Screen.Settings
@@ -196,7 +179,7 @@ fun MainScreen(
                         label = { Text(stringResource(screen.titleResId)) },
                         selected = isSelected,
                         onClick = {
-                            if (isSelected && !(currentKey is Screen.Map && screen is Screen.Passes)) return@item
+                            if (isSelected) return@item
                             while (backStack.size > 1) backStack.removeAt(backStack.size - 1)
                             if (screen !is Screen.Passes) backStack.add(screen)
                         }
@@ -236,8 +219,7 @@ fun MainScreen(
                                     container.setMutualPassData(MutualPassData())
                                     container.satelliteRepo.selectPass(catNum, aosTime)
                                     navigateToRadar()
-                                },
-                                navigateToMap = navigateToMap
+                                }
                             )
                         }
                         entry<Screen.Map> {

core/data/src/main/java/com/rtbishop/look4sat/core/data/database/Look4SatDao.kt

@@ -60,4 +60,7 @@ interface Look4SatDao {
 
     @Query("DELETE FROM radios")
     suspend fun deleteRadios()
+
+    @Query("DELETE FROM radios WHERE isCustom = 0")
+    suspend fun deleteManagedRadios()
 }

core/data/src/main/java/com/rtbishop/look4sat/core/data/database/Look4SatDb.kt

@@ -19,19 +19,21 @@ package com.rtbishop.look4sat.core.data.database
 
 import androidx.room.Database
 import androidx.room.RoomDatabase
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
 import com.rtbishop.look4sat.core.data.database.entity.SatEntry
 import com.rtbishop.look4sat.core.data.database.entity.SatRadio
 
-@Database(entities = [SatEntry::class, SatRadio::class], version = 1, exportSchema = false)
+@Database(entities = [SatEntry::class, SatRadio::class], version = 2, exportSchema = false)
 abstract class Look4SatDb : RoomDatabase() {
     abstract fun look4SatDao(): Look4SatDao
 }
 
-//val MIGRATION_1_2 = object : Migration(1, 2) {
-//    override fun migrate(database: SupportSQLiteDatabase) {
-//        database.execSQL("CREATE TABLE entries_backup (name TEXT NOT NULL, epoch REAL NOT NULL, meanmo REAL NOT NULL, eccn REAL NOT NULL, incl REAL NOT NULL, raan REAL NOT NULL, argper REAL NOT NULL, meanan REAL NOT NULL, catnum INTEGER NOT NULL, bstar REAL NOT NULL, xincl REAL NOT NULL, xnodeo REAL NOT NULL, omegao REAL NOT NULL, xmo REAL NOT NULL, xno REAL NOT NULL, orbitalPeriod REAL NOT NULL, isDeepSpace INTEGER NOT NULL, comment TEXT, PRIMARY KEY(catnum))")
-//        database.execSQL("INSERT INTO entries_backup (name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar, xincl, xnodeo, omegao, xmo, xno, orbitalPeriod, isDeepSpace, comment) SELECT name, epoch, meanmo, eccn, incl, raan, argper, meanan, catnum, bstar, xincl, xnodeo, omegao, xmo, xno, 1440 / meanmo, 1440 / meanmo >= 225.0, comment FROM entries")
-//        database.execSQL("DROP TABLE entries")
-//        database.execSQL("ALTER TABLE entries_backup RENAME TO entries")
-//    }
-//}
+/** Adds the mean motion derivative, needed to tell decayed satellites apart, and marks the
+ * transceivers that were imported from a file, so that remote updates leave them alone. */
+val MIGRATION_1_2 = object : Migration(1, 2) {
+    override fun migrate(db: SupportSQLiteDatabase) {
+        db.execSQL("ALTER TABLE entries ADD COLUMN ndot REAL NOT NULL DEFAULT 0.0")
+        db.execSQL("ALTER TABLE radios ADD COLUMN isCustom INTEGER NOT NULL DEFAULT 0")
+    }
+}

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

@@ -30,5 +30,6 @@ data class SatEntry(
     val argper: Double,
     val meanan: Double,
     val catnum: Int,
-    val bstar: Double
+    val bstar: Double,
+    val ndot: Double = 0.0
 )

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

@@ -32,5 +32,7 @@ data class SatRadio(
     val uplinkHigh: Long?,
     val uplinkMode: String?,
     val isInverted: Boolean,
-    val catnum: Int?
+    val catnum: Int?,
+    /** Set for manually imported transceivers, which remote updates must not replace. */
+    val isCustom: Boolean = false
 )

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

@@ -24,6 +24,7 @@ import android.hardware.display.DisplayManager
 import android.location.LocationManager
 import androidx.room.Room
 import com.rtbishop.look4sat.core.data.database.Look4SatDb
+import com.rtbishop.look4sat.core.data.database.MIGRATION_1_2
 import com.rtbishop.look4sat.core.data.framework.BluetoothReporter
 import com.rtbishop.look4sat.core.data.framework.Ft817Controller
 import com.rtbishop.look4sat.core.data.framework.Ic705Controller
@@ -167,7 +168,10 @@ class MainContainer(private val context: Context) : IMainContainer {
 
     private fun provideLocalSource(): ILocalSource {
         val builder = Room.databaseBuilder(context, Look4SatDb::class.java, "Look4SatDBv400")
-        val database = builder.fallbackToDestructiveMigration(false).build()
+        val database = builder
+            .addMigrations(MIGRATION_1_2)
+            .fallbackToDestructiveMigration(false)
+            .build()
         return LocalSource(database.look4SatDao())
     }
 

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

@@ -58,7 +58,7 @@ class DatabaseRepo(
         var importedCount = 0
         remoteSource.getFileStream(uri)?.let { stream ->
             val transceivers = dataParser.parseJSONStream(unwrapIfZipped(uri, stream))
-            localSource.insertRadios(transceivers)
+            localSource.insertRadios(transceivers, isCustom = true)
             importedCount = transceivers.size
         }
         setUpdateSuccessful(System.currentTimeMillis())
@@ -105,9 +105,16 @@ class DatabaseRepo(
             val normUrl = normalizeUrl(rawUrl)
             result.stream?.let { dataParser.parseJSONStream(unwrapIfZipped(normUrl, it)) }.orEmpty()
         }.filter { it.uuid.isNotBlank() }.distinctBy { it.uuid }
-        // insert parsed data into the database
-        localSource.insertEntries(importedEntries)
-        localSource.insertRadios(importedRadios)
+        // insert parsed data into the database.
+        // Transceivers are a full snapshot: sources publish active entries only, so a retired
+        // transceiver simply disappears from the feed and has to be dropped locally as well.
+        // Manually imported ones (isCustom) are kept: no source can refresh them, so nothing
+        // would bring them back if they were replaced here.
+        if (importedRadios.isNotEmpty()) {
+            localSource.deleteManagedRadios()
+            localSource.insertRadios(importedRadios)
+        }
+        if (importedEntries.isNotEmpty()) localSource.insertEntries(importedEntries)
         setUpdateSuccessful(System.currentTimeMillis())
     }
 

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

@@ -47,8 +47,11 @@ class LoTWRepository : ILoTWRepository {
     override suspend fun fetchConfirmedGrids(callsign: String, password: String): LoTWResult =
         withContext(Dispatchers.IO) {
             fetchReportBody(callsign, password).fold(
-                onSuccess = { body -> parseBoth(body)?.let { LoTWResult.Success(it.first, it.second) }
-                    ?: LoTWResult.RateLimited },
+                onSuccess = { body ->
+                    parseBoth(body)?.let { (grids, _, roamed) ->
+                        LoTWResult.Success(grids, emptyMap(), roamed)
+                    } ?: LoTWResult.RateLimited
+                },
                 onFailure = { toResult(it) }
             )
         }
@@ -58,8 +61,11 @@ class LoTWRepository : ILoTWRepository {
         password: String
     ): LoTWResult = withContext(Dispatchers.IO) {
         fetchReportBody(callsign, password).fold(
-            onSuccess = { body -> parseBoth(body)?.let { LoTWResult.Success(it.first, it.second) }
-                ?: LoTWResult.RateLimited },
+            onSuccess = { body ->
+                parseBoth(body)?.let { (grids, qsos, roamed) ->
+                    LoTWResult.Success(grids, qsos, roamed)
+                } ?: LoTWResult.RateLimited
+            },
             onFailure = { toResult(it) }
         )
     }
@@ -71,11 +77,14 @@ class LoTWRepository : ILoTWRepository {
         else -> LoTWResult.NetworkError(e.message ?: e.javaClass.simpleName)
     }
 
-    /** Single report fetch feeding both the grid set and the per-QSO detail. */
-    private fun parseBoth(body: String): Pair<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>>? {
+    /** Single report fetch feeding the grid set, the per-QSO detail and the roamed set. */
+    private fun parseBoth(
+        body: String
+    ): Triple<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>, Set<String>>? {
         val grids = parseConfirmedGrids(body) ?: return null
         val qsos = parseConfirmedGridQsos(body) ?: return null
-        return grids to qsos
+        val roamed = parseRoamedGrids(body) ?: return null
+        return Triple(grids, qsos, roamed)
     }
 
     private fun fetchReportBody(callsign: String, password: String): Result<String> {
@@ -160,6 +169,7 @@ class LoTWRepository : ILoTWRepository {
         var country: String? = null
         var cqz: Int? = null
         var state: String? = null
+        var myGrid: String? = null
         val gridsInRecord = mutableListOf<String>()
 
         fun emitRecord() {
@@ -168,7 +178,8 @@ class LoTWRepository : ILoTWRepository {
             val qso = com.rtbishop.look4sat.core.domain.model.GridQso(
                 call = call, epochMs = epochMs, satName = satName,
                 mode = mode, bandUp = bandUp, bandDown = bandDown,
-                dxcc = dxcc, country = country, cqz = cqz, state = state
+                dxcc = dxcc, country = country, cqz = cqz, state = state,
+                myGrid = myGrid
             )
             for (grid in gridsInRecord) {
                 result.getOrPut(grid) { mutableListOf() }.add(qso)
@@ -179,6 +190,7 @@ class LoTWRepository : ILoTWRepository {
             propMode = null; call = ""; qsoDate = ""; timeOn = ""
             satName = ""; mode = ""; bandUp = ""; bandDown = ""
             dxcc = null; country = null; cqz = null; state = null
+            myGrid = null
             gridsInRecord.clear()
         }
 
@@ -213,6 +225,13 @@ class LoTWRepository : ILoTWRepository {
                     cqz = adifValue(line).toIntOrNull()
                 line.startsWith("<STATE:") ->
                     state = adifValue(line).trim().ifBlank { null }?.let { normalizeState(it) }
+                line.startsWith("<MY_GRIDSQUARE:") -> {
+                    // Own-station grid (must not be confused with GRIDSQUARE —
+                    // the opposite station's grid). Recorded per QSO so awards
+                    // can be counted per operated grid.
+                    val value = adifValue(line)
+                    if (value.length >= 4) myGrid = value.take(4).uppercase()
+                }
                 line.startsWith("<GRIDSQUARE:") || line.startsWith("<VUCC_GRIDS:") -> {
                     // VUCC_GRIDS holds a comma-separated list of grids
                     // ("EN52en,EN53fa"), up to four for contacts spanning
@@ -255,9 +274,6 @@ class LoTWRepository : ILoTWRepository {
     }
 
     internal fun parseConfirmedGrids(body: String): Set<String>? {
-        // LoTW answers with ADIF text; on bad credentials it returns a short error page
-        // containing "password=?" or an <eoh>-less block. Treat anything without a header
-        // marker as failure so the caller can show a sensible message.
         // LoTW answers with ADIF text; on bad credentials it returns a short error
         // page without an <eoh> header terminator. Real reports always carry <eoh>
         // (LoTW writes it lowercase). Match case-insensitively to be safe.
@@ -268,25 +284,34 @@ class LoTWRepository : ILoTWRepository {
         // QSOs omit it. Grid fields (GRIDSQUARE / VUCC_GRIDS) must only be
         // collected for records whose PROP_MODE is SAT, otherwise the map mixes
         // in terrestrial contacts.
+        //
+        // Buffered per-record pattern (same as parseConfirmedGridQsos): field order
+        // is NOT reliable — ADIF producers (incl. LoTW) emit fields alphabetically,
+        // so <GRIDSQUARE> (G) arrives BEFORE <PROP_MODE> (P) within a record. A
+        // sequential gate ("only add while propMode == SAT") silently drops every
+        // grid on real reports. Buffer the record and decide at <EOR> instead.
         var propMode: String? = null
+        var pendingGrids = mutableListOf<String>()
         for (raw in body.lineSequence()) {
             val line = raw.trim()
             when {
-                line.equals("<EOR>", ignoreCase = true) -> propMode = null
+                line.equals("<EOR>", ignoreCase = true) -> {
+                    if (propMode == "SAT") grids.addAll(pendingGrids)
+                    propMode = null
+                    pendingGrids = mutableListOf()
+                }
                 line.startsWith("<PROP_MODE:") -> {
-                    propMode = line.substringAfter('>').substringBefore("E<").trim().uppercase()
+                    propMode = adifValue(line).uppercase()
                 }
                 line.startsWith("<GRIDSQUARE:") || line.startsWith("<VUCC_GRIDS:") -> {
-                    if (propMode == "SAT") {
-                        // VUCC_GRIDS holds a comma-separated PAIR of grids
-                        // ("EN52en,EN53fa") for contacts spanning two squares —
-                        // split on ',' and take the 4-char field of each, or the
-                        // second grid is silently dropped.
-                        val value = line.substringAfter('>').substringBefore("E<")
-                        value.split(',').forEach { grid ->
-                            val field = grid.trim().uppercase()
-                            if (field.length >= 4) grids.add(field.take(4))
-                        }
+                    // VUCC_GRIDS holds a comma-separated PAIR of grids
+                    // ("EN52en,EN53fa") for contacts spanning two squares —
+                    // split on ',' and take the 4-char field of each, or the
+                    // second grid is silently dropped.
+                    val value = adifValue(line)
+                    value.split(',').forEach { grid ->
+                        val field = grid.trim().uppercase()
+                        if (field.length >= 4) pendingGrids.add(field.take(4))
                     }
                 }
             }
@@ -294,6 +319,47 @@ class LoTWRepository : ILoTWRepository {
         return grids
     }
 
+    /**
+     * Distinct 4-char gridsquares the account itself operated from, taken from
+     * ADIF <MY_GRIDSQUARE> of satellite QSO records only. This is the
+     * "roamed / activated" set shown as blue stripes on the map — the grids
+     * where the operator's own station was located during confirmed QSOs (a
+     * rover may log several distinct grids; the home grid is included too).
+     * Returns null when the body is not an ADIF report (mirrors the other parsers).
+     */
+    internal fun parseRoamedGrids(body: String): Set<String>? {
+        if (!body.contains("<eoh>", ignoreCase = true)) return null
+        val grids = mutableSetOf<String>()
+        // Buffered per-record pattern (same as parseConfirmedGridQsos): field
+        // order is NOT reliable — ADIF producers (incl. LoTW) emit fields
+        // alphabetically, so <MY_GRIDSQUARE> (M) arrives BEFORE <PROP_MODE> (P)
+        // within a record. A sequential gate ("only add while propMode == SAT")
+        // would silently drop every own grid on real reports; buffer the record
+        // and decide at <EOR> instead.
+        var propMode: String? = null
+        var myGrid: String? = null
+        for (raw in body.lineSequence()) {
+            val line = raw.trim()
+            when {
+                line.equals("<EOR>", ignoreCase = true) -> {
+                    if (propMode == "SAT" && myGrid != null) grids.add(myGrid)
+                    propMode = null
+                    myGrid = null
+                }
+                line.startsWith("<PROP_MODE:") -> {
+                    propMode = adifValue(line).uppercase()
+                }
+                line.startsWith("<MY_GRIDSQUARE:") -> {
+                    // MY_GRIDSQUARE must not be mistaken for GRIDSQUARE (the
+                    // opposite station's grid) — only own-station grids count.
+                    val value = adifValue(line)
+                    if (value.length >= 4) myGrid = value.take(4)
+                }
+            }
+        }
+        return grids
+    }
+
     private companion object {
         const val BASE_URL = "https://lotw.arrl.org/lotwuser/lotwreport.adi"
     }

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

@@ -35,6 +35,8 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.withContext
 import java.util.TimeZone
@@ -66,8 +68,11 @@ class SatelliteRepo(
     override suspend fun initRepository() = withContext(dispatcher) {
         combine(
             settingsRepo.selectedIds,
-            settingsRepo.stationPosition
-        ) { selectedIds, _ -> selectedIds }
+            settingsRepo.stationPosition,
+            // Recalculate passes when the UTC display toggle changes, so an existing
+            // AOS time window is reapplied in the newly selected timezone.
+            settingsRepo.otherSettings.map { it.stateOfUtc }.distinctUntilChanged()
+        ) { selectedIds, _, _ -> selectedIds }
             .collect { selectedIds ->
                 _satellites.update { localStorage.getEntriesWithIds(selectedIds) }
                 val settings = settingsRepo.passesSettings.value
@@ -175,7 +180,16 @@ class SatelliteRepo(
         aosEndMinute: Int,
         invertAosTimeWindow: Boolean
     ): Boolean {
-        val offsetMillis = TimeZone.getDefault().getOffset(aosTime).toLong()
+        // Follow the UTC display toggle: with UTC enabled the window is interpreted
+        // in UTC, otherwise in the device's local timezone. Otherwise the pass list
+        // shows UTC times while the filter silently uses local time — the two
+        // disagree by the timezone offset (e.g. 8h for China).
+        val tz = if (settingsRepo.otherSettings.value.stateOfUtc) {
+            TimeZone.getTimeZone("UTC")
+        } else {
+            TimeZone.getDefault()
+        }
+        val offsetMillis = tz.getOffset(aosTime).toLong()
         val localMillis = Math.floorMod(aosTime + offsetMillis, 24L * 60L * 60L * 1000L)
         val aosMinute = (localMillis / 60_000L).toInt()
         val inRange = if (aosStartMinute <= aosEndMinute) {

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

@@ -204,7 +204,9 @@ class SettingsRepo(
                         dxcc = o.optInt("dx", 0).takeIf { it > 0 },
                         country = o.optString("cty").ifBlank { null },
                         cqz = o.optInt("cq", 0).takeIf { it > 0 },
-                        state = o.optString("st").ifBlank { null }
+                        state = o.optString("st").ifBlank { null },
+                        // Own-grid field: absent in pre-myGrid data -> null.
+                        myGrid = o.optString("mg").ifBlank { null }
                     )
                 }
                 if (list.isNotEmpty()) result[grid] = list
@@ -232,6 +234,7 @@ class SettingsRepo(
                         .put("cty", q.country ?: "")
                         .put("cq", q.cqz ?: 0)
                         .put("st", q.state ?: "")
+                        .put("mg", q.myGrid ?: "")
                 )
             }
             root.put(grid, array)
@@ -239,6 +242,29 @@ class SettingsRepo(
         preferences.edit { putString(keyWorkedGridQsos, root.toString()) }
     }
 
+    // Distinct 4-char gridsquares the account operated from (LoTW <MY_GRIDSQUARE>,
+    // satellite QSOs only). Stored as a JSONArray like workedGrids.
+    private val keyRoamedGrids = "roamedGrids"
+
+    override fun getRoamedGrids(): Set<String> {
+        val json = preferences.getString(keyRoamedGrids, null).orEmpty()
+        if (json.isBlank()) return emptySet()
+        return try {
+            val array = org.json.JSONArray(json)
+            (0 until array.length()).mapNotNull { i ->
+                array.optString(i).takeIf { it.isNotBlank() }
+            }.toSet()
+        } catch (_: Exception) {
+            emptySet()
+        }
+    }
+
+    override fun setRoamedGrids(grids: Set<String>) {
+        val array = org.json.JSONArray()
+        grids.sorted().forEach { array.put(it) }
+        preferences.edit { putString(keyRoamedGrids, array.toString()) }
+    }
+
     // LoTW credentials (stored locally on the device only)
     private val keyLoTWCall = "lotwCallsign"
     private val keyLoTWPass = "lotwPassword"

core/data/src/main/java/com/rtbishop/look4sat/core/data/source/LocalSource.kt

@@ -51,12 +51,12 @@ class LocalSource(private val look4SatDao: Look4SatDao) : ILocalSource {
 
     private fun FrameworkEntry.toDomain() = OrbitalData(
         this.name, this.epoch, this.meanmo, this.eccn, this.incl,
-        this.raan, this.argper, this.meanan, this.catnum, this.bstar
+        this.raan, this.argper, this.meanan, this.catnum, this.bstar, this.ndot
     )
 
     private fun OrbitalData.toEntity() = FrameworkEntry(
         this.name, this.epoch, this.meanmo, this.eccn, this.incl,
-        this.raan, this.argper, this.meanan, this.catnum, this.bstar
+        this.raan, this.argper, this.meanan, this.catnum, this.bstar, this.ndot
     )
 
     private fun List<OrbitalData>.toEntity() = this.map { item -> item.toEntity() }
@@ -73,20 +73,22 @@ class LocalSource(private val look4SatDao: Look4SatDao) : ILocalSource {
         return look4SatDao.getRadiosWithId(id).toDomainRadios()
     }
 
-    override suspend fun insertRadios(radios: List<SatRadio>) {
-        look4SatDao.insertRadios(radios.toFrameworkRadios())
+    override suspend fun insertRadios(radios: List<SatRadio>, isCustom: Boolean) {
+        look4SatDao.insertRadios(radios.map { it.copy(isCustom = isCustom) }.toFrameworkRadios())
     }
 
+    override suspend fun deleteManagedRadios() = look4SatDao.deleteManagedRadios()
+
     override suspend fun deleteRadios() = look4SatDao.deleteRadios()
 
     private fun DomainRadio.toFramework() = FrameworkRadio(
         this.uuid, this.info, this.isAlive, this.downlinkLow, this.downlinkHigh, this.downlinkMode,
-        this.uplinkLow, this.uplinkHigh, this.uplinkMode, this.isInverted, this.catnum
+        this.uplinkLow, this.uplinkHigh, this.uplinkMode, this.isInverted, this.catnum, this.isCustom
     )
 
     private fun FrameworkRadio.toDomain() = DomainRadio(
         this.uuid, this.info, this.isAlive, this.downlinkLow, this.downlinkHigh, this.downlinkMode,
-        this.uplinkLow, this.uplinkHigh, this.uplinkMode, this.isInverted, this.catnum
+        this.uplinkLow, this.uplinkHigh, this.uplinkMode, this.isInverted, this.catnum, this.isCustom
     )
 
     private fun List<DomainRadio>.toFrameworkRadios() = this.map { radio -> radio.toFramework() }

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

@@ -185,8 +185,12 @@ private class FakeLocalSource : ILocalSource {
 
     override suspend fun getRadiosWithId(id: Int): List<SatRadio> = emptyList()
 
-    override suspend fun insertRadios(radios: List<SatRadio>) {
-        insertedRadios += radios
+    override suspend fun insertRadios(radios: List<SatRadio>, isCustom: Boolean) {
+        insertedRadios += radios.map { it.copy(isCustom = isCustom) }
+    }
+
+    override suspend fun deleteManagedRadios() {
+        insertedRadios.removeAll { !it.isCustom }
     }
 
     override suspend fun deleteRadios() {
@@ -296,6 +300,14 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     override fun getWorkedGridQsos(): Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>> = emptyMap()
 
     override fun setWorkedGridQsos(qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>) = Unit
+
+    override fun getRoamedGrids(): Set<String> = emptySet()
+
+    private val roamedGrids = MutableStateFlow(emptySet<String>())
+
+    override fun setRoamedGrids(grids: Set<String>) {
+        roamedGrids.value = grids
+    }
 }
 
 private fun defaultDataSourcesSettings(): DataSourcesSettings {

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

@@ -3,6 +3,7 @@ package com.rtbishop.look4sat.core.data.repository
 import com.rtbishop.look4sat.core.domain.repository.LoTWResult
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
 import org.junit.Test
 
 class LoTWRepositoryTest {
@@ -61,6 +62,28 @@ class LoTWRepositoryTest {
         assertEquals(setOf("OL62"), result)
     }
 
+    @Test
+    fun parseHandlesAlphabeticalFieldOrder() {
+        // Real lotwreport.adi emits fields in ALPHABETICAL order: GRIDSQUARE (G)
+        // and VUCC_GRIDS come BEFORE PROP_MODE (P) inside each record. The old
+        // sequential gate (add only while propMode == SAT) dropped every grid on
+        // real reports — the buffered parser must collect them regardless of
+        // field order and filter at <EOR>.
+        val satQso = "<CALL:6>BA7OPF\n" +
+            "<GRIDSQUARE:4>NL47\n" +
+            "<MODE:3>FM\n" +
+            "<PROP_MODE:3>SAT\n" +
+            "<SAT_NAME:5>FO-29\n" +
+            "<VUCC_GRIDS:11>EN52en,EN53fa\n" +
+            "<EOR>\n"
+        val groundQso = "<CALL:6>BA7OPF\n" +
+            "<GRIDSQUARE:4>PM95\n" +
+            "<QSO_DATE:8>20260821\n" +
+            "<EOR>\n"
+        val result = repo.parseConfirmedGrids(report(satQso, groundQso))
+        assertEquals(setOf("NL47", "EN52", "EN53"), result)
+    }
+
     @Test
     fun parseReturnsEmptySetForReportWithoutGrids() {
         val satQso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>AO-07\n<EOR>\n"
@@ -128,6 +151,79 @@ class LoTWRepositoryTest {
         assertNull(repo.parseConfirmedGridQsos("<HTML>Username/password incorrect</HTML>"))
     }
 
+    @Test
+    fun parseQsosCapturesOwnGridPerQso() {
+        // MY_GRIDSQUARE arrives BEFORE PROP_MODE (ADIF fields are emitted
+        // alphabetically); the per-record buffer must still attach it to the QSO.
+        val qso1 = "<CALL:5>A50QO\n<QSO_DATE:8>20260820\n<MY_GRIDSQUARE:4>OL62\n" +
+            "<PROP_MODE:3>SAT\n<SAT_NAME:5>FO-29\n<MODE:2>CW\n" +
+            "<BAND:3>70CM\n<BAND_RX:3>2M\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        val qso2 = "<CALL:6>BG7ZFK\n<QSO_DATE:8>20260819\n<MY_GRIDSQUARE:4>OL72\n" +
+            "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n<MODE:3>FM\n" +
+            "<BAND:3>70CM\n<BAND_RX:3>2M\n<GRIDSQUARE:4>OK48\n<EOR>\n"
+        val result = repo.parseConfirmedGridQsos(report(qso1, qso2))!!
+        assertEquals("OL62", result["NL47"]!!.first().myGrid)
+        assertEquals("OL72", result["OK48"]!!.first().myGrid)
+        // Ground QSO (no PROP_MODE=SAT) must not leak its MY_GRIDSQUARE.
+        val ground = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260821\n<MY_GRIDSQUARE:4>OL62\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        assertTrue(repo.parseConfirmedGridQsos(report(qso1, ground))!!.values.all { it.all { q -> q.myGrid == "OL62" } })
+    }
+
+    // endregion
+
+    // region parseRoamedGrids (MY_GRIDSQUARE = grids the account operated from)
+
+    @Test
+    fun parseRoamedGridsCollectsOwnStationGrids() {
+        // Satellite QSOs carry MY_GRIDSQUARE = the grid the account itself
+        // operated from (the "roamed/activated" set shown as blue stripes).
+        val qso1 = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260820\n<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n" +
+            "<MY_GRIDSQUARE:4>OL62\n<GRIDSQUARE:4>PM95\n<EOR>\n"
+        val qso2 = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260901\n<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n" +
+            "<MY_GRIDSQUARE:4>OL72\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        assertEquals(setOf("OL62", "OL72"), repo.parseRoamedGrids(report(qso1, qso2)))
+    }
+
+    @Test
+    fun parseRoamedGridsIgnoresGroundQsos() {
+        val ground = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260821\n<MY_GRIDSQUARE:4>OL72\n<EOR>\n"
+        assertEquals(emptySet<String>(), repo.parseRoamedGrids(report(ground)))
+    }
+
+    @Test
+    fun parseRoamedGridsDoesNotConfuseGridsquareWithMyGridsquare() {
+        // GRIDSQUARE (opposite station's grid) must never leak into the roamed set.
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n<MY_GRIDSQUARE:4>OL62\n" +
+            "<GRIDSQUARE:6>OM60IL\n<EOR>\n"
+        assertEquals(setOf("OL62"), repo.parseRoamedGrids(report(qso)))
+    }
+
+    @Test
+    fun parseRoamedGridsTruncatesSixCharToFour() {
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>IO-86\n<MY_GRIDSQUARE:6>OL62AA\n<EOR>\n"
+        assertEquals(setOf("OL62"), repo.parseRoamedGrids(report(qso)))
+    }
+
+    @Test
+    fun parseRoamedGridsHandlesAlphabeticalFieldOrder() {
+        // Real lotwreport.adi emits fields alphabetically, so <MY_GRIDSQUARE>
+        // (M) arrives BEFORE <PROP_MODE> (P). The old sequential gate (add only
+        // while propMode == SAT) silently returned an EMPTY set on real reports —
+        // this is the exact bug that made the blue roamed stripes never appear.
+        val qso = "<CALL:6>BA7OPF\n" +
+            "<GRIDSQUARE:4>PM95\n" +
+            "<MY_GRIDSQUARE:6>OL72XX\n" +
+            "<PROP_MODE:3>SAT\n" +
+            "<SAT_NAME:5>IO-86\n" +
+            "<EOR>\n"
+        assertEquals(setOf("OL72"), repo.parseRoamedGrids(report(qso)))
+    }
+
+    @Test
+    fun parseRoamedGridsRejectsBodyWithoutEoh() {
+        assertNull(repo.parseRoamedGrids("<HTML>Username/password incorrect</HTML>"))
+    }
+
     // endregion
 
     // region failure classification (fetchReportBody -> LoTWResult mapping)

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

@@ -48,7 +48,9 @@ data class GridQso(
     val dxcc: Int? = null,
     val country: String? = null,
     val cqz: Int? = null,
-    val state: String? = null
+    val state: String? = null,
+    /** 4-char grid the station itself operated from (ADIF MY_GRIDSQUARE). */
+    val myGrid: String? = null
 ) {
     /** 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/model/SatRadio.kt

@@ -32,5 +32,7 @@ data class SatRadio(
     @SerialName("uplink_high") val uplinkHigh: Long?,
     @SerialName("uplink_mode") val uplinkMode: String?,
     @SerialName("invert") val isInverted: Boolean,
-    @SerialName("norad_cat_id") val catnum: Int?
+    @SerialName("norad_cat_id") val catnum: Int?,
+    /** Set for manually imported transceivers, which remote updates must not replace. */
+    val isCustom: Boolean = false
 )

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

@@ -102,6 +102,9 @@ interface ISettingsRepo {
     /** Confirmed satellite QSOs grouped by worked 4-char gridsquare (map tap detail). */
     fun getWorkedGridQsos(): Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>
     fun setWorkedGridQsos(qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>)
+    /** Distinct 4-char gridsquares the account operated from (LoTW <MY_GRIDSQUARE>). */
+    fun getRoamedGrids(): Set<String>
+    fun setRoamedGrids(grids: Set<String>)
     //endregion
 
     //region # LoTW confirmed-grids settings

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

@@ -23,7 +23,10 @@ sealed class LoTWResult {
     /** Report downloaded and parsed successfully. */
     data class Success(
         val grids: Set<String>,
-        val qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>
+        val qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>,
+        /** Distinct 4-char gridsquares the account itself operated from
+         *  (ADIF <MY_GRIDSQUARE>, satellite QSOs only) — "roamed/activated" grids. */
+        val roamedGrids: Set<String> = emptySet()
     ) : LoTWResult()
 
     /** HTTP 200 but LoTW replied with its login-error page (bad callsign/password). */

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/source/ILocalSource.kt

@@ -31,6 +31,9 @@ interface ILocalSource {
     suspend fun getIdsWithModes(modes: List<String>): List<Int>
     suspend fun getRadiosTotal(): Int
     suspend fun getRadiosWithId(id: Int): List<SatRadio>
-    suspend fun insertRadios(radios: List<SatRadio>)
+    suspend fun insertRadios(radios: List<SatRadio>, isCustom: Boolean = false)
+
+    /** Delete all non-custom transceivers, keeping manually imported ones. */
+    suspend fun deleteManagedRadios()
     suspend fun deleteRadios()
 }

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/predict/CelestialComputerTest.kt

@@ -0,0 +1,79 @@
+/*
+ * 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.predict
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.time.Instant
+import kotlin.math.abs
+
+class CelestialComputerTest {
+
+    private data class RiseSetCase(
+        val name: String,
+        val observer: GeoPos,
+        val startIso: String
+    )
+
+    @Test
+    fun `findSunRiseSet returns distinct sunrise and sunset for representative locations`() {
+        val cases = listOf(
+            RiseSetCase("Equator at March equinox", GeoPos(0.0, 0.0), "2026-03-20T00:00:00Z"),
+            RiseSetCase("Equator at September equinox", GeoPos(0.0, 0.0), "2026-09-23T00:00:00Z"),
+            RiseSetCase("Sydney winter", GeoPos(-33.8688, 151.2093), "2026-06-21T00:00:00Z"),
+            RiseSetCase("Buenos Aires winter", GeoPos(-34.6037, -58.3816), "2026-06-21T00:00:00Z"),
+            RiseSetCase("Cape Town winter", GeoPos(-33.9249, 18.4241), "2026-06-21T00:00:00Z"),
+            RiseSetCase("London summer", GeoPos(51.5074, -0.1278), "2026-06-21T00:00:00Z")
+        )
+
+        cases.forEach { testCase ->
+            val result = CelestialComputer.findSunRiseSet(testCase.observer, testCase.startIso.toMillis())
+            val daylightDuration = result.setTimeMillis - result.riseTimeMillis
+
+            assertTrue("${testCase.name}: sunrise should be non-zero", result.riseTimeMillis > 0L)
+            assertTrue("${testCase.name}: sunset should be non-zero", result.setTimeMillis > 0L)
+            assertTrue("${testCase.name}: sunset should be after sunrise", result.setTimeMillis > result.riseTimeMillis)
+            assertTrue("${testCase.name}: daylight duration should be longer than 1 hour", daylightDuration > HOUR_MILLIS)
+            assertTrue("${testCase.name}: daylight duration should be shorter than 24 hours", daylightDuration < DAY_MILLIS)
+
+            val riseElevation = CelestialComputer.getSunPosition(testCase.observer, result.riseTimeMillis).elevation
+            val setElevation = CelestialComputer.getSunPosition(testCase.observer, result.setTimeMillis).elevation
+            assertEquals("${testCase.name}: sunrise should converge near the standard threshold", SUNRISE_SET_THRESHOLD, riseElevation, 0.02)
+            assertEquals("${testCase.name}: sunset should converge near the standard threshold", SUNRISE_SET_THRESHOLD, setElevation, 0.02)
+        }
+    }
+
+    @Test
+    fun `findSunRiseSet does not return the same instant for equinox regression cases`() {
+        listOf("2026-03-20T00:00:00Z", "2026-09-23T00:00:00Z").forEach { startIso ->
+            val result = CelestialComputer.findSunRiseSet(GeoPos(0.0, 0.0), startIso.toMillis())
+            val separationMillis = abs(result.setTimeMillis - result.riseTimeMillis)
+
+            assertTrue("$startIso: sunrise and sunset should be separated", separationMillis > HOUR_MILLIS)
+        }
+    }
+
+    private fun String.toMillis(): Long = Instant.parse(this).toEpochMilli()
+
+    private companion object {
+        private const val SUNRISE_SET_THRESHOLD = -0.8333
+        private const val HOUR_MILLIS = 60L * 60L * 1000L
+        private const val DAY_MILLIS = 24L * HOUR_MILLIS
+    }
+}

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

@@ -122,6 +122,8 @@
     <string name="map_visibility">能见度：%s</string>
     <!-- Worked-grid QSO dialog -->
     <string name="grid_qso_calls_count">%d 个呼号 · %d 次通联</string>
+    <string name="grid_qso_count_one">%d QSO</string>
+    <string name="grid_qso_count_many">%d QSOs</string>
     <string name="grid_qso_first">首通</string>
     <string name="grid_qso_no_sat">卫星未知</string>
     <string name="map_visible">日照中</string>

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

@@ -147,6 +147,8 @@
     <string name="map_visibility">Visibility: %s</string>
     <!-- Worked-grid QSO dialog -->
     <string name="grid_qso_calls_count">%d callsigns · %d QSOs</string>
+    <string name="grid_qso_count_one">%d QSO</string>
+    <string name="grid_qso_count_many">%d QSOs</string>
     <string name="grid_qso_first">First</string>
     <string name="grid_qso_no_sat">satellite unknown</string>
     <string name="map_visible">Visible</string>

feature/cw/build.gradle.kts

@@ -10,10 +10,11 @@ android {
     compileOptions {
         encoding = "UTF-8"
     }
-    // 照搬 Morse Expert 1.15: native 解码器仅 armeabi-v7a
+    // Morse Expert 1.15 官方 Play 分包提供 ARM32/ARM64 原生解码器
+    // (jniLibs/armeabi-v7a + arm64-v8a), 两个 ABI 都打进 APK
     defaultConfig {
         ndk {
-            abiFilters += listOf("armeabi-v7a")
+            abiFilters += listOf("armeabi-v7a", "arm64-v8a")
         }
     }
 }

feature/map/src/main/assets/awards/dxcc.json

@@ -1 +1 @@
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feature/map/src/main/assets/awards/waja.json

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Line truncated
+{"type":"waz","regions":[{"id":1,"code":"1","name":"1","label_lon":-140,"label_lat":75,"rings":[[[-109.0,85.0],[-109.0,77.5],[-103.2588,75.2824],[-103.4495,72.3827],[-99.2896,70.6113],[-102.0,68.0],[-102.0,60.0],[-139.0569,60.0001],[-138.7074,59.9061],[-138.6686,59.8091],[-138.626,59.7686],[-137.6062,59.2436],[-137.5007,58.9835],[-137.5266,58.9059],[-137.4512,58.9081],[-137.281,59.001],[-136.8272,59.1604],[-136.5843,59.166],[-136.4897,59.2595],[-136.4956,59.2754],[-136.4695,59.284],[-136.4771,59.4656],[-136.3681,59.449],[-136.3055,59.4644],[-136.2387,59.5242],[-136.2393,59.5592],[-136.3538,59.5998],[-136.1933,59.6401],[-135.9529,59.6622],[-135.4793,59.798],[-135.3601,59.7376],[-135.2336,59.6962],[-135.2198,59.6627],[-135.1575,59.6257],[-135.1179,59.6231],[-135.0289,59.5637],[-135.0275,59.4748],[-135.101,59.4276],[-134.9897,59.3871],[-135.0305,59.3466],[-134.9596,59.2808],[-134.7007,59.2489],[-134.6793,59.1925],[-134.5659,59.1312],[-134.4831,59.1316],[-134.3821,59.0386],[-134.4072,58.9796],[-134.3138,58.962],[-134.3365,58.9235],[-134.2579,58.8612],[-133.8404,58.7293],[-133.7068,58.6117],[-133.3772,58.4303],[-133.462,58.3879],[-133.346,58.2769],[-133.1722,58.1536],[-133.0701,58.0002],[-132.8689,57.8393],[-132.7512,57.6962],[-132.5542,57.4971],[-132.37,57.35],[-132.2487,57.2116],[-132.3688,57.0917],[-132.0449,57.045],[-132.1237,56.8739],[-131.8735,56.806],[-131.9009,56.7537],[-131.8604,56.703],[-131.8353,56.5994],[-131.5815,56.6123],[-131.4716,56.5523],[-131.1726,56.4494],[-131.0884,56.4062],[-130.7825,56.3671],[-130.6242,56.2672],[-130.4683,56.2431],[-130.4264,56.1415],[-130.2468,56.0966],[-130.104,56.1229],[-130.0037,56.0081],[-130.0178,55.9119],[-130.0041,55.9074],[-130.1524,55.7664],[-130.1481,55.7152],[-130.1118,55.6829],[-130.1281,55.5809],[-130.09,55.498],[-130.0413,55.4517],[-130.0211,55.3379],[-129.9742,55.282],[-130.1029,55.1926],[-130.1876,55.0629],[-130.346,54.9177],[-130.5682,54.7922],[-130.6591,54.7631],[-130.6257,54.7381],[-130.6156,54.7074],[-134.5376,54.2944],[-140.0,50.0],[-140.0,40.0],[-190.0,40.0],[-190.0,53.0],[-167.6871,66.6671],[-180.0,75.0],[-180.0,85.0],[-109.0,85.0]]]},{"id":2,"code":"2","name":"2","label_lon":-82.5,"label_lat":70,"rings":[[[-109.0,85.0],[-109.0,77.5],[-103.2588,75.2824],[-103.4495,72.3827],[-99.2896,70.6113],[-102.0,68.0],[-102.0,60.0],[-85.0,60.0],[-80.8725,54.5159],[-79.7772,51.8514],[-79.6522,51.6179],[-79.5157,51.4606],[-79.5176,50.0],[-60.0,50.0],[-55.9546,51.7455],[-55.4041,51.765],[-49.0,53.0],[-52.2437,59.5838],[-57.8076,67.1394],[-67.854,74.2269],[-74.0332,75.4972],[-74.8618,77.4191],[-73.5809,78.5637],[-69.8831,79.5013],[-68.2947,80.439],[-60.0073,82.2668],[-60.0,85.0],[-109.0,85.0]]]},{"id":3,"code":"3","name":"3","label_lon":-125,"label_lat":45,"rings":[[[-120.0,60.0],[-139.0569,60.0001],[-138.7074,59.9061],[-138.6686,59.8091],[-138.626,59.7686],[-137.6062,59.2436],[-137.5007,58.9835],[-137.5266,58.9059],[-137.4512,58.9081],[-137.281,59.001],[-136.8272,59.1604],[-136.5843,59.166],[-136.4897,59.2595],[-136.4956,59.2754],[-136.4695,59.284],[-136.4771,59.4656],[-136.3681,59.449],[-136.3055,59.4644],[-136.2387,59.5242],[-136.2393,59.5592],[-136.3538,59.5998],[-136.1933,59.6401],[-135.9529,59.6622],[-135.4793,59.798],[-135.3601,59.7376],[-135.2336,59.6962],[-135.2198,59.6627],[-135.1575,59.6257],[-135.1179,59.6231],[-135.0289,59.5637],[-135.0275,59.4748],[-135.101,59.4276],[-134.9897,59.3871],[-135.0305,59.3466],[-134.9596,59.2808],[-134.7007,59.2489],[-134.6793,59.1925],[-134.5659,59.1312],[-134.4831,59.1316],[-134.3821,59.0386],[-134.4072,58.9796],[-134.3138,58.962],[-134.3365,58.9235],[-134.2579,58.8612],[-133.8404,58.7293],[-133.7068,58.6117],[-133.3772,58.4303],[-133.462,58.3879],[-133.346,58.2769],[-133.1722,58.1536],[-133.0701,58.0002],[-132.8689,57.8393],[-132.7512,57.6962],[-132.5542,57.4971],[-132.37,57.35],[-132.2487,57.2116],[-132.3688,57.0917],[-132.0449,57.045],[-132.1237,56.8739],[-131.8735,56.806],[-131.9009,56.7537],[-131.8604,56.703],[-131.8353,56.5994],[-131.5815,56.6123],[-131.4716,56.5523],[-131.1726,56.4494],[-131.0884,56.4062],[-130.7825,56.3671],[-130.6242,56.2672],[-130.4683,56.2431],[-130.4264,56.1415],[-130.2468,56.0966],[-130.104,56.1229],[-130.0037,56.0081],[-130.0178,55.9119],[-130.0041,55.9074],[-130.1524,55.7664],[-130.1481,55.7152],[-130.1118,55.6829],[-130.1281,55.5809],[-130.09,55.498],[-130.0413,55.4517],[-130.0211,55.3379],[-129.9742,55.282],[-130.1029,55.1926],[-130.1876,55.0629],[-130.346,54.9177],[-130.5682,54.7922],[-130.6591,54.7631],[-130.6257,54.7381],[-130.6156,54.7074],[-134.5376,54.2944],[-140.0,50.0],[-140.0,40.0],[-130.0,40.0],[-130.0,32.5],[-120.0,32.5],[-117.1249,32.534],[-114.7197,32.7187],[-114.7643,32.6427],[-114.8087,32.6191],[-114.7997,32.5924],[-114.8137,32.5613],[-114.7932,32.5696],[-114.7916,32.5558],[-114.8057,32.5467],[-114.8135,32.4943],[-111.0748,31.3322],[-109.05,31.3325],[-109.0501,41.0007],[-111.0467,40.9979],[-111.049,44.474],[-111.1227,44.4937],[-111.1394,44.5171],[-111.1317,44.5326],[-111.17Line truncated

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

@@ -35,7 +35,8 @@ import kotlin.math.min
  * One administrative/boundary region loaded from the award GeoJSON assets.
  *
  * @param code     match key against award statistics (e.g. "GD", "34", "24", "CA", "318")
- * @param name     display label (province/prefecture/state/country name)
+ * @param name     display label in the source language (province/prefecture/state/country name)
+ * @param nameEn   optional English display label (null when the source already is English)
  * @param labelLon/labelLat preferred label anchor (usually the region centroid)
  * @param rings    polygon exterior rings as lon/lat pairs; the overlay projects
  *                 them per frame with the same projection helpers as the grid overlay
@@ -43,6 +44,7 @@ import kotlin.math.min
 data class AwardRegion(
     val code: String,
     val name: String,
+    val nameEn: String? = null,
     val labelLon: Double,
     val labelLat: Double,
     val rings: List<List<DoubleArray>>,
@@ -93,6 +95,7 @@ object AwardBoundaryData {
                     AwardRegion(
                         code = o.optString("code"),
                         name = o.optString("name"),
+                        nameEn = o.optString("name_en").takeIf { it.isNotEmpty() },
                         labelLon = o.optDouble("label_lon", 0.0),
                         labelLat = o.optDouble("label_lat", 0.0),
                         rings = rings,
@@ -184,6 +187,10 @@ class AwardBoundaryOverlay : Overlay() {
         labelPaint.textAlign = Paint.Align.CENTER
         val fontMetrics = labelPaint.fontMetrics
         val textHalfHeight = (fontMetrics.descent + fontMetrics.ascent) / 2f
+        // Label language follows the system: Chinese UI keeps the source
+        // (Chinese/Japanese) names; any other UI language uses the English
+        // name when the asset provides one (falls back to the source name).
+        val useEnglishLabels = mapView.context.resources.configuration.locales[0].language != "zh"
 
         for (i in regions.indices) {
             val region = regions[i]
@@ -236,7 +243,8 @@ class AwardBoundaryOverlay : Overlay() {
             // anchor sits out on the sea where there is room for the text.
             val regionH = (projectionToY(projection, b[3]) ?: 0f) - (projectionToY(projection, b[1]) ?: 0f)
             if (abs(regionH) < MIN_LABEL_REGION_PX && !region.forceLabel) continue
-            canvas.drawText(region.name, lx, ly - textHalfHeight, labelPaint)
+            val label = if (useEnglishLabels) region.nameEn ?: region.name else region.name
+            canvas.drawText(label, lx, ly - textHalfHeight, labelPaint)
         }
     }
 

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

@@ -56,10 +56,19 @@ class MaidenheadGridOverlay : Overlay() {
         style = android.graphics.Paint.Style.FILL
         color = Color.argb(90, 76, 217, 100)
     }
-    private val ownLinePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
-        strokeWidth = 4.5f
+    private val roamStripePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
         style = Paint.Style.STROKE
-        color = Color.argb(255, 90, 200, 255)
+        strokeWidth = 14f
+        // Same alpha as the green worked fill (90) — user req: stripe opacity
+        // must match the green grid. Wide 14f stripes at 44f spacing read as a
+        // sparse GridMaster-style zebra (user picked spacing 44 / width 14).
+        color = Color.argb(90, 66, 133, 244)
+    }
+    private val ownLinePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        strokeWidth = 6f
+        style = Paint.Style.STROKE
+        // 与普通网格线同色(淡黄), 仅加粗 — 用户要求当前网格框线不换色
+        color = Color.argb(160, 255, 224, 130)
     }
     private val selectedLinePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
         strokeWidth = 4.5f
@@ -70,6 +79,12 @@ class MaidenheadGridOverlay : Overlay() {
     /** Worked gridsquares (4-char, uppercase) to highlight, e.g. {"OL62", "PM95"}. */
     var workedGrids: Set<String> = emptySet()
 
+    /**
+     * Gridsquares the station operated from (4-char, uppercase) — drawn with
+     * blue 45° stripes (GridMaster-style zebra), e.g. {"OL62", "PM95"}.
+     */
+    var roamedGrids: Set<String> = emptySet()
+
     /** The station's own 4-char gridsquare, drawn with a distinct outline. */
     var ownGrid: String? = null
 
@@ -120,9 +135,13 @@ class MaidenheadGridOverlay : Overlay() {
         val worldTurns = ceil(((rightLon - leftLon) / 360.0) - 1e-9).toInt().coerceAtLeast(0)
         val colRepeats = if (worldTurns > 0) worldTurns else 0
 
-        // The station's own grid square (4-char, only meaningful at sub-square zoom)
-        val ownCell = ownGrid?.takeIf { zoom >= GRID_ZOOM_SUB }
-        // The tapped worked grid gets a distinct outline (same zoom gate).
+        // The station's own grid: always keep a bold outline of the 4-char
+        // square. At sub-square zoom it matches the visible cell grid; at field
+        // zoom (2-char labels) the own 2°x1° square is drawn on top of the
+        // field grid so the operator still sees exactly where they are (user
+        // req: "field zoom must also draw the own 4-char grid, bolded").
+        val ownCell = ownGrid
+        // The tapped worked grid gets a distinct outline (sub-square zoom only).
         val selectedCell = selectedGrid?.takeIf { zoom >= GRID_ZOOM_SUB }
 
         // Worked-grid highlight fills.
@@ -182,6 +201,57 @@ class MaidenheadGridOverlay : Overlay() {
             }
         }
 
+        // Roamed/activated grid stripes: blue 45° zebra (GridMaster style) over
+        // every cell the station operated from. Drawn AFTER the worked fills so
+        // a worked+roamed cell shows blue stripes with green between them — the
+        // stripe paint is fully opaque, so the two colors never alpha-blend
+        // into a teal/green mix. Same geometry as the worked fills (per-4-char
+        // cell at both zoom levels). The station's OWN grid is excluded: it
+        // already carries the bold outline and must not be striped (user req).
+        if (roamedGrids.isNotEmpty()) {
+            if (zoom >= GRID_ZOOM_SUB) {
+                for (row in firstRow..lastRow) {
+                    val lat = row * cellLat
+                    if (lat < -90.0 || lat >= 90.0) continue
+                    val topLatCell = lat + cellLat
+                    if (topLatCell > 90.0) continue
+                    val yTop = projectionToY(projection, topLatCell) ?: continue
+                    val yBottom = projectionToY(projection, lat) ?: continue
+                    for (turn in -colRepeats..colRepeats) for (col in firstCol..lastCol) {
+                        val lon = col * cellLon
+                        val xLeftBase = projectionToX(projection, lon, centerLon, worldWidthPx) ?: continue
+                        val xRightBase = projectionToX(projection, lon + cellLon, centerLon, worldWidthPx) ?: continue
+                        val xLeft = xLeftBase + turn * worldWidthPx.toFloat()
+                        val xRight = xRightBase + turn * worldWidthPx.toFloat()
+                        if (xRight < 0f || xLeft > canvas.width) continue
+                        val label = cellLabel(lat, lon, zoom)
+                        if (label in roamedGrids && label != ownGrid) {
+                            drawStripes(canvas, xLeft, yTop, xRight, yBottom)
+                        }
+                    }
+                }
+            } else {
+                for (grid in roamedGrids) {
+                    // The own grid keeps only its bold outline — no stripes.
+                    if (grid == ownGrid) continue
+                    val cell = gridCellBounds(grid) ?: continue
+                    for (turn in -colRepeats..colRepeats) {
+                        val dLon = turn * 360.0
+                        if (cell.lonRight + dLon <= leftLon || cell.lonLeft + dLon >= rightLon) continue
+                        val yTop = projectionToY(projection, cell.latTop) ?: continue
+                        val yBottom = projectionToY(projection, cell.latBottom) ?: continue
+                        val xLeftBase = projectionToX(projection, cell.lonLeft, centerLon, worldWidthPx) ?: continue
+                        val xRightBase = projectionToX(projection, cell.lonRight, centerLon, worldWidthPx) ?: continue
+                        val xLeft = xLeftBase + turn * worldWidthPx.toFloat()
+                        val xRight = xRightBase + turn * worldWidthPx.toFloat()
+                        if (xRight < 0f || xLeft > canvas.width) continue
+                        if (yBottom < 0f || yTop > canvas.height) continue
+                        drawStripes(canvas, xLeft, yTop, xRight, yBottom)
+                    }
+                }
+            }
+        }
+
         // Vertical lines (meridians). Worked-grid cells are NOT excluded:
         // the boundary lines between adjacent worked squares must stay visible
         // so the grid structure remains readable (reverted 2026-09-09 — the
@@ -225,22 +295,50 @@ class MaidenheadGridOverlay : Overlay() {
         // The station's own grid square: redraw its four borders thicker on top.
         // The tapped worked grid gets the same treatment in a different color.
         if (ownCell != null || selectedCell != null) {
-            for (row in firstRow..lastRow) {
-                val lat = row * cellLat
-                if (lat < -90.0 || lat >= 90.0) continue
-                for (col in firstCol..lastCol) {
-                    val lon = col * cellLon
-                    val label = cellLabel(lat, lon, zoom)
-                    if (label != ownCell && label != selectedCell) continue
-                    val yTop = projectionToY(projection, lat + cellLat) ?: continue
-                    val yBottom = projectionToY(projection, lat) ?: continue
-                    val xLeft = projectionToX(projection, lon, centerLon, worldWidthPx) ?: continue
-                    val xRight = projectionToX(projection, lon + cellLon, centerLon, worldWidthPx) ?: continue
-                    val paint = if (label == selectedCell) selectedLinePaint else ownLinePaint
-                    canvas.drawLine(xLeft, yTop, xRight, yTop, paint)
-                    canvas.drawLine(xLeft, yBottom, xRight, yBottom, paint)
-                    canvas.drawLine(xLeft, yTop, xLeft, yBottom, paint)
-                    canvas.drawLine(xRight, yTop, xRight, yBottom, paint)
+            if (zoom >= GRID_ZOOM_SUB) {
+                for (row in firstRow..lastRow) {
+                    val lat = row * cellLat
+                    if (lat < -90.0 || lat >= 90.0) continue
+                    for (col in firstCol..lastCol) {
+                        val lon = col * cellLon
+                        val label = cellLabel(lat, lon, zoom)
+                        if (label != ownCell && label != selectedCell) continue
+                        val yTop = projectionToY(projection, lat + cellLat) ?: continue
+                        val yBottom = projectionToY(projection, lat) ?: continue
+                        val xLeft = projectionToX(projection, lon, centerLon, worldWidthPx) ?: continue
+                        val xRight = projectionToX(projection, lon + cellLon, centerLon, worldWidthPx) ?: continue
+                        val paint = if (label == selectedCell) selectedLinePaint else ownLinePaint
+                        canvas.drawLine(xLeft, yTop, xRight, yTop, paint)
+                        canvas.drawLine(xLeft, yBottom, xRight, yBottom, paint)
+                        canvas.drawLine(xLeft, yTop, xLeft, yBottom, paint)
+                        canvas.drawLine(xRight, yTop, xRight, yBottom, paint)
+                    }
+                }
+            } else {
+                // Field zoom: the visible grid shows 2-char fields only, but the
+                // station's own 2°x1° square still gets its bold outline drawn
+                // on top of the field grid (user req). selectedCell is null here.
+                val grid = ownCell
+                if (grid != null) {
+                    val cell = gridCellBounds(grid)
+                    if (cell != null) {
+                        for (turn in -colRepeats..colRepeats) {
+                            val dLon = turn * 360.0
+                            if (cell.lonRight + dLon <= leftLon || cell.lonLeft + dLon >= rightLon) continue
+                            val yTop = projectionToY(projection, cell.latTop) ?: continue
+                            val yBottom = projectionToY(projection, cell.latBottom) ?: continue
+                            val xLeftBase = projectionToX(projection, cell.lonLeft, centerLon, worldWidthPx) ?: continue
+                            val xRightBase = projectionToX(projection, cell.lonRight, centerLon, worldWidthPx) ?: continue
+                            val xLeft = xLeftBase + turn * worldWidthPx.toFloat()
+                            val xRight = xRightBase + turn * worldWidthPx.toFloat()
+                            if (xRight < 0f || xLeft > canvas.width) continue
+                            if (yBottom < 0f || yTop > canvas.height) continue
+                            canvas.drawLine(xLeft, yTop, xRight, yTop, ownLinePaint)
+                            canvas.drawLine(xLeft, yBottom, xRight, yBottom, ownLinePaint)
+                            canvas.drawLine(xLeft, yTop, xLeft, yBottom, ownLinePaint)
+                            canvas.drawLine(xRight, yTop, xRight, yBottom, ownLinePaint)
+                        }
+                    }
                 }
             }
         }
@@ -270,8 +368,14 @@ class MaidenheadGridOverlay : Overlay() {
             if (topLatCell > 90.0) continue
             val yTop = projectionToY(projection, topLatCell) ?: continue
             val yBottom = projectionToY(projection, lat) ?: continue
-            val yCenter = (yTop + yBottom) / 2f - textHalfHeight
-            if (yBottom < 0f || yTop > canvas.height) continue
+            // Polar bands (80..90 / -90..-80) extend beyond the map's latitude
+            // limit, so their geometric center falls off-screen and the label
+            // would never be visible. Center the label in the VISIBLE part of
+            // the cell instead; fully off-screen cells are still skipped.
+            val visTop = maxOf(yTop, 0f)
+            val visBottom = minOf(yBottom, canvas.height.toFloat())
+            if (visBottom < 0f || visTop > canvas.height) continue
+            val yCenter = (visTop + visBottom) / 2f - textHalfHeight
             for (turn in -colRepeats..colRepeats) for (col in firstCol..lastCol) {
                 val lon = col * cellLon
                 // World-repeat copies: keep the turn offset in pixels (same
@@ -287,6 +391,26 @@ class MaidenheadGridOverlay : Overlay() {
         }
     }
 
+    /**
+     * Draws 45° diagonal stripes (GridMaster-style zebra) clipped to the cell
+     * rectangle, from top-left to bottom-right. The paint is nearly opaque so
+     * stripes stay blue even over a green worked fill underneath.
+     */
+    private fun drawStripes(canvas: Canvas, xLeft: Float, yTop: Float, xRight: Float, yBottom: Float) {
+        if (xRight <= xLeft || yBottom <= yTop) return
+        canvas.save()
+        canvas.clipRect(xLeft, yTop, xRight, yBottom)
+        val height = yBottom - yTop
+        // Start one stripe-width left of the cell so the top-left corner is
+        // always covered; each stripe runs from (x, top) to (x+height, bottom).
+        var x = xLeft - height
+        while (x < xRight) {
+            canvas.drawLine(x, yTop, x + height, yBottom, roamStripePaint)
+            x += STRIPE_SPACING_PX
+        }
+        canvas.restore()
+    }
+
     /** X pixel for a longitude (meridians are vertical in Web Mercator). */
     private fun projectionToX(projection: Projection, lon: Double, centerLon: Double, worldWidthPx: Double): Float? {
         // Do NOT use osmdroid's toPixels() here: at low zoom its wrap-around
@@ -304,7 +428,15 @@ class MaidenheadGridOverlay : Overlay() {
 
     /** Y pixel for a latitude, or null when outside the viewport. */
     private fun projectionToY(projection: Projection, lat: Double): Float? {
-        val geo = org.osmdroid.util.GeoPoint(lat, 0.0)
+        // Web Mercator is undefined beyond ±85.0511° (osmdroid clamps the world
+        // to TileSystemWebMercator limits). Projecting the polar field rows
+        // (lat=±90: Maidenhead row R = 80..90°N, row A = -90..-80°S) yields
+        // ±9.2e18 pixel coordinates that the canvas cannot rasterize, so the
+        // polar grid lines silently vanish. Clamp to the Mercator limit: the
+        // polar rows then project onto the screen edge and their lines are
+        // drawn (the off-limit sliver beyond 85.05° is invisible anyway).
+        val clamped = lat.coerceIn(-MAX_MERCATOR_LAT, MAX_MERCATOR_LAT)
+        val geo = org.osmdroid.util.GeoPoint(clamped, 0.0)
         val p = projection.toPixels(geo, null)
         return p.y.toFloat()
     }
@@ -360,6 +492,9 @@ class MaidenheadGridOverlay : Overlay() {
         const val FIELD_LON = 20.0
         const val SUB_SQUARE_LAT = 1.0
         const val SUB_SQUARE_LON = 2.0
+        // Web Mercator latitude limit (osmdroid TileSystemWebMercator): projecting
+        // beyond it produces ±9.2e18 pixel coordinates the canvas cannot draw.
+        const val MAX_MERCATOR_LAT = 85.05112877980658
         // Zoom at which the 2°x1° sub-square grid lines/fills appear.
         // 5.0 → 6.0: at zoom 5 a full field spans too little screen width and
         // the sub-square grid is too dense to read; 6 roughly doubles the
@@ -370,5 +505,9 @@ class MaidenheadGridOverlay : Overlay() {
         const val LABEL_ZOOM_SUB = 6.5
         const val MIN_LABEL_CELL_PX = 48f
         const val MAX_OVERSHOOT_PX = 64
+        /** Center-to-center spacing of the roamed-grid zebra stripes, in px. */
+        // 44f spacing (was 16f — too dense per user) with 14f-wide stripes;
+        // sparse GridMaster-style zebra.
+        const val STRIPE_SPACING_PX = 44f
     }
 }

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

@@ -21,6 +21,7 @@ import android.graphics.Canvas
 import android.graphics.Color
 import android.graphics.Paint
 import android.graphics.RectF
+import org.osmdroid.util.GeoPoint
 import org.osmdroid.views.MapView
 import org.osmdroid.views.overlay.Overlay
 import kotlin.math.cos
@@ -39,9 +40,11 @@ import kotlin.math.sin
  * exceeds 90°, i.e. the dot product of the two unit vectors is negative:
  *   dot = sin(lat)*sin(sunLat) + cos(lat)*cos(sunLat)*cos(lon - sunLon) < 0
  *
- * Performance: we sample one column per [stepPx] pixels (default 4) and draw
+ * Performance: we sample one column per stepPx pixels (default 4) and draw
  * filled vertical rectangles.  On a 1080-wide screen this means ~270 trig
- * evaluations per row, which is imperceptible.
+ * evaluations per row, which is imperceptible.  draw() is called on every
+ * frame, so it must stay allocation-free — all fromPixels() calls reuse a
+ * single GeoPoint instance.
  */
 class MapNightOverlay : Overlay() {
 
@@ -58,6 +61,9 @@ class MapNightOverlay : Overlay() {
 
     private val rect = RectF()
 
+    /** Reused across every fromPixels() call — draw() runs on every frame, so it must not allocate */
+    private val reusableGeoPoint = GeoPoint(0.0, 0.0)
+
     override fun draw(canvas: Canvas, mapView: MapView, shadow: Boolean) {
         if (shadow) return
 
@@ -71,6 +77,15 @@ class MapNightOverlay : Overlay() {
         val h = mapView.height
         val stepPx = 4 // sample every N pixels — balance quality vs CPU
 
+        // The map is never rotated, so latitude depends only on y and longitude only on x.
+        // Resolve the top/bottom latitudes once instead of once per column.
+        val latTopRad = Math.toRadians((proj.fromPixels(0, 0, reusableGeoPoint) ?: return).latitude)
+        val latBotRad = Math.toRadians((proj.fromPixels(0, h - 1, reusableGeoPoint) ?: return).latitude)
+        val sinLatTop = sin(latTopRad)
+        val cosLatTop = cos(latTopRad)
+        val sinLatBot = sin(latBotRad)
+        val cosLatBot = cos(latBotRad)
+
         // We scan column by column. For each column we determine the longitude,
         // then find the latitude range that is in night and shade it.
         // Since longitude is constant along a vertical strip and the day/night
@@ -79,22 +94,14 @@ class MapNightOverlay : Overlay() {
 
         var x = 0
         while (x < w) {
-            // Get the geographic coordinate at the top and bottom of this column.
-            val geoTop = proj.fromPixels(x, 0) ?: run { x += stepPx; continue }
-            val geoBot = proj.fromPixels(x, h - 1) ?: run { x += stepPx; continue }
-
+            val geoTop = proj.fromPixels(x, 0, reusableGeoPoint) ?: run { x += stepPx; continue }
             val lonRad = Math.toRadians(geoTop.longitude)
             val cosLonDiff = cos(lonRad - sunLonRad)
 
-            // Top pixel geographic lat
-            val latTopRad = Math.toRadians(geoTop.latitude)
-            // Bottom pixel geographic lat (osmdroid: y=0 is top of screen, higher y = lower lat)
-            val latBotRad = Math.toRadians(geoBot.latitude)
-
             // dot(sunVec, pointVec) < 0 → night
             // dot = sin(lat)*sinSunLat + cos(lat)*cosSunLat*cosLonDiff
-            val dotTop = sin(latTopRad) * sinSunLat + cos(latTopRad) * cosSunLat * cosLonDiff
-            val dotBot = sin(latBotRad) * sinSunLat + cos(latBotRad) * cosSunLat * cosLonDiff
+            val dotTop = sinLatTop * sinSunLat + cosLatTop * cosSunLat * cosLonDiff
+            val dotBot = sinLatBot * sinSunLat + cosLatBot * cosSunLat * cosLonDiff
 
             when {
                 dotTop < 0 && dotBot < 0 -> {
@@ -142,7 +149,7 @@ class MapNightOverlay : Overlay() {
         var hi = yBot
         while (hi - lo > 1) {
             val mid = (lo + hi) / 2
-            val geo = proj.fromPixels(x, mid) ?: return mid
+            val geo = proj.fromPixels(x, mid, reusableGeoPoint) ?: return mid
             val latRad = Math.toRadians(geo.latitude)
             val dot = sin(latRad) * sinSunLat + cos(latRad) * cosSunLat * cosLonDiff
             if (dot < 0) hi = mid else lo = mid

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

@@ -90,6 +90,10 @@ import com.rtbishop.look4sat.core.presentation.TopBar
 import com.rtbishop.look4sat.core.presentation.isVerticalLayout
 import com.rtbishop.look4sat.core.presentation.layoutPadding
 import org.osmdroid.tileprovider.tilesource.XYTileSource
+import org.osmdroid.events.DelayedMapListener
+import org.osmdroid.events.MapListener
+import org.osmdroid.events.ScrollEvent
+import org.osmdroid.events.ZoomEvent
 import org.osmdroid.util.GeoPoint
 import org.osmdroid.views.CustomZoomButtonsController
 import org.osmdroid.views.MapView
@@ -145,6 +149,21 @@ fun MapDestination() {
     val viewModel: MapViewModel = viewModel(factory = MapViewModel.factory(container))
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
     val mapView = rememberMapViewWithLifecycle()
+    val lifecycle = LocalLifecycleOwner.current.lifecycle
+    DisposableEffect(lifecycle) {
+        val observer = LifecycleEventObserver { _, event ->
+            when (event) {
+                Lifecycle.Event.ON_START -> viewModel.onAction(MapAction.SetVisible(true))
+                Lifecycle.Event.ON_STOP -> viewModel.onAction(MapAction.SetVisible(false))
+                else -> {}
+            }
+        }
+        lifecycle.addObserver(observer)
+        onDispose {
+            lifecycle.removeObserver(observer)
+            viewModel.onAction(MapAction.SetVisible(false))
+        }
+    }
     MapScreen(uiState, viewModel::onAction, mapView)
 }
 
@@ -157,15 +176,43 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
     // Tapped worked grid -> centered QSO dialog. Local UI state: the map is the
     // only consumer and it resets when leaving the page.
     var selectedGrid by remember { mutableStateOf<String?>(null) }
-    // Selected award filter (null = "All" = plain worked-grid view).
-    var selectedAward by remember { mutableStateOf<AwardType?>(null) }
+    // Selected award filter. Entering grid mode defaults to VUCC (the plain
+    // worked-grid view); the reset effect below re-asserts that on every entry.
+    var selectedAward by remember { mutableStateOf<AwardType?>(AwardType.VUCC) }
     // Six-award progress derived from the confirmed QSO store; recomputed when
     // the store changes (LoTW/Wavelog sync).
-    val awardProgress: List<AwardProgress> = remember(uiState.workedGridQsos) {
-        AwardCalculator.calculate(uiState.workedGridQsos)
+    // Per operated-grid VUCC breakdown: myGrid -> set of worked grids worked from it.
+    val vuccByMyGrid: Map<String, Set<String>> = remember(uiState.workedGridQsos) {
+        val m = mutableMapOf<String, MutableSet<String>>()
+        for ((grid, qsos) in uiState.workedGridQsos) {
+            for (q in qsos) {
+                val mg = q.myGrid ?: continue
+                m.getOrPut(mg) { mutableSetOf() }.add(grid)
+            }
+        }
+        m
+    }
+    // Selected operated grid for VUCC counting; defaults to the grid with the
+    // most worked grids. Null when the store carries no per-QSO myGrid data
+    // (requires a LoTW resync) — then VUCC falls back to the global count.
+    var selectedMyGrid by remember(vuccByMyGrid) {
+        mutableStateOf(vuccByMyGrid.maxByOrNull { it.value.size }?.key)
+    }
+    val awardProgress: List<AwardProgress> = remember(uiState.workedGridQsos, vuccByMyGrid, selectedMyGrid) {
+        val vuccGrids = selectedMyGrid?.let { vuccByMyGrid[it].orEmpty() }
+        val base = AwardCalculator.calculate(uiState.workedGridQsos)
+        if (vuccGrids == null) base
+        else base.map { p ->
+            if (p.type == AwardType.VUCC) p.copy(workedKeys = vuccGrids, count = vuccGrids.size) else p
+        }
+    }
+    // Worked grids drawn on the map: filtered by the selected operated grid
+    // (null = all operated grids). Drives both the green fills and the tap
+    // listener below, so switching the selector changes which cells are green.
+    val workedGrids = remember(uiState.workedGrids, vuccByMyGrid, selectedMyGrid) {
+        if (selectedMyGrid == null) uiState.workedGrids
+        else vuccByMyGrid[selectedMyGrid] ?: emptySet()
     }
-    // Attach the tap listener whenever grid mode / worked grids change.
-    val workedGrids = uiState.workedGrids
     val isGridMode = uiState.isGridMode
     DisposableEffect(isGridMode, workedGrids) {
         val receiver = object : org.osmdroid.events.MapEventsReceiver {
@@ -192,6 +239,11 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
         (mapView.overlays.getOrNull(OVERLAY_GRID) as? MaidenheadGridOverlay)?.selectedGrid = selectedGrid
         mapView.invalidate()
     }
+    // Re-assert the VUCC default each time grid mode is entered; while already
+    // in grid mode the user's chip choice is preserved.
+    LaunchedEffect(uiState.isGridMode) {
+        if (uiState.isGridMode) selectedAward = AwardType.VUCC
+    }
 
     LaunchedEffect(uiState.track) {
         // In grid mode the map is centered on the local grid square; following
@@ -249,8 +301,9 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
                         // stationPosition would swallow the centering forever.
                         val shouldCenter = uiState.isGridMode && !prevGridMode
                         setGridMode(
-                            uiState.isGridMode, uiState.workedGrids, view,
-                            if (shouldCenter) uiState.stationPosition else null
+                            uiState.isGridMode, workedGrids, uiState.roamedGrids, view,
+                            uiState.stationPosition,
+                            centerOnStation = shouldCenter
                         )
                         if (!shouldCenter || uiState.stationPosition != null) {
                             prevGridMode = uiState.isGridMode
@@ -272,6 +325,19 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
                         if (isVertical) MapDataCard(mapData) else MapDataCards(mapData)
                     }
                 }
+                // Top-left: operated-grid selector for VUCC counting (grid mode only).
+                // Shown whenever per-grid QSO data exists; "All" (null) is available.
+                if (uiState.isGridMode && selectedAward == AwardType.VUCC && vuccByMyGrid.isNotEmpty()) {
+                    VuccGridSelector(
+                        options = vuccByMyGrid,
+                        allCount = uiState.workedGrids.size,
+                        selected = selectedMyGrid,
+                        onSelect = { selectedMyGrid = it },
+                        modifier = Modifier
+                            .align(Alignment.TopStart)
+                            .padding(8.dp)
+                    )
+                }
                 GridModeToggle(
                     isGridMode = uiState.isGridMode,
                     onToggle = { onAction(MapAction.ToggleGridMode(it)) },
@@ -374,18 +440,36 @@ private fun WorkedGridCallRow(
                 style = MaterialTheme.typography.titleMedium,
                 fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
                 color = MaterialTheme.colorScheme.tertiary,
+                maxLines = 1,
+                overflow = androidx.compose.ui.text.style.TextOverflow.Ellipsis,
                 modifier = Modifier.weight(1f)
             )
             Text(
-                text = formatDate(first.epochMs, isUtc),
+                // Plurals resources don't work for zh (only 'other' matches), so
+                // pick the singular/plural string explicitly.
+                text = if (callQsos.size == 1) stringResource(R.string.grid_qso_count_one, 1)
+                else stringResource(R.string.grid_qso_count_many, callQsos.size),
                 style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant
-            )
-            Text(
-                text = if (expanded) " ▴" else " ▾",
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.primary
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                textAlign = androidx.compose.ui.text.style.TextAlign.Center,
+                modifier = Modifier.weight(1f)
             )
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.End,
+                modifier = Modifier.weight(1f)
+            ) {
+                Text(
+                    text = formatDate(first.epochMs, isUtc),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                Text(
+                    text = if (expanded) " ▴" else " ▾",
+                    fontSize = 18.sp,
+                    color = MaterialTheme.colorScheme.primary
+                )
+            }
         }
         // First-QSO summary line, always visible.
         Text(
@@ -553,6 +637,93 @@ private fun AwardChipsRow(
     }
 }
 
+/**
+ * Compact pill toggle for switching between satellite view and grid mode,
+ * floated over the map's top-right corner. The label reflects the active
+ * mode ("Grid mode" when ON, "Satellite mode" when OFF). Semi-transparent
+ * background keeps the map readable underneath.
+ */
+@Composable
+private fun VuccGridSelector(
+    options: Map<String, Set<String>>,
+    allCount: Int,
+    selected: String?,
+    onSelect: (String?) -> Unit,
+    modifier: Modifier = Modifier
+) {
+    var expanded by remember { mutableStateOf(false) }
+    // Most-worked grid first; selection is made on tap. "All" sits last.
+    val sorted = remember(options) { options.entries.sortedByDescending { it.value.size } }
+    Surface(
+        color = ComposeColor.Black.copy(alpha = 0.45f),
+        shape = RoundedCornerShape(8.dp),
+        modifier = modifier
+    ) {
+        Column {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .clickable { expanded = !expanded }
+                    .padding(start = 10.dp, end = 6.dp, top = 4.dp, bottom = 4.dp)
+            ) {
+                Text(
+                    text = if (selected == null) "All ($allCount)"
+                    else "$selected (${options[selected]?.size ?: 0})",
+                    color = ComposeColor.White,
+                    fontSize = 12.sp,
+                    fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+                )
+                Text(
+                    text = if (expanded) " ▴" else " ▾",
+                    fontSize = 18.sp,
+                    color = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.padding(start = 4.dp)
+                )
+            }
+            if (expanded) {
+                androidx.compose.material3.HorizontalDivider(color = ComposeColor.White.copy(alpha = 0.2f))
+                sorted.forEach { (grid, grids) ->
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .clickable {
+                                onSelect(grid)
+                                expanded = false
+                            }
+                            .padding(horizontal = 10.dp, vertical = 3.dp)
+                    ) {
+                        Text(
+                            text = "$grid (${grids.size})",
+                            color = if (grid == selected) MaterialTheme.colorScheme.primary else ComposeColor.White,
+                            fontSize = 12.sp,
+                            fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+                        )
+                    }
+                }
+                // "All" always listed last: shows every worked grid combined.
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .clickable {
+                            onSelect(null)
+                            expanded = false
+                        }
+                        .padding(horizontal = 10.dp, vertical = 3.dp)
+                ) {
+                    Text(
+                        text = "All ($allCount)",
+                        color = if (selected == null) MaterialTheme.colorScheme.primary else ComposeColor.White,
+                        fontSize = 12.sp,
+                        fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+                    )
+                }
+            }
+        }
+    }
+}
+
 /**
  * Compact pill toggle for switching between satellite view and grid mode,
  * floated over the map's top-right corner. The label reflects the active
@@ -631,19 +802,26 @@ private fun setAwardMode(award: AwardType, workedCodes: Set<String>, mapView: Ma
 private fun setGridMode(
     gridMode: Boolean,
     workedGrids: Set<String>,
+    roamedGrids: Set<String>,
     mapView: MapView,
-    stationPosition: GeoPos?
+    stationPosition: GeoPos?,
+    centerOnStation: Boolean = false
 ) {
     try {
         val gridOverlay = mapView.overlays[OVERLAY_GRID]
         if (gridOverlay is MaidenheadGridOverlay) {
             gridOverlay.isEnabled = gridMode
             gridOverlay.workedGrids = workedGrids
+            gridOverlay.roamedGrids = roamedGrids
+            // ownGrid must be set on EVERY update — the position is available
+            // regardless of whether this frame centers (centering happens only
+            // on entry, but passing null here would wipe the bold outline).
             gridOverlay.ownGrid = ownGridOf(stationPosition)
         } else {
             mapView.overlays[OVERLAY_GRID] = MaidenheadGridOverlay().apply {
                 isEnabled = gridMode
                 this.workedGrids = workedGrids
+                this.roamedGrids = roamedGrids
                 this.ownGrid = ownGridOf(stationPosition)
             }
         }
@@ -657,7 +835,7 @@ private fun setGridMode(
         // first composition this runs before MapView's first layout, and a
         // setCenter issued pre-layout is discarded when the view lays out —
         // the map then keeps its default center forever.
-        if (gridMode) {
+        if (gridMode && centerOnStation) {
             val pos = stationPosition ?: return
             val lat = pos.latitude
             val lon = pos.longitude
@@ -717,6 +895,27 @@ private fun setStationPosition(stationPos: GeoPos, mapView: MapView) {
     }
 }
 
+/** Above this many satellites inside the viewport labels are dropped in favor of a single
+ * shared dot icon. Per-satellite label bitmaps cost ~90KB each, so drawing thousands of them
+ * exhausts memory and stalls the UI thread — and overlapping labels are unreadable anyway. */
+private const val LABEL_LIMIT = 128
+
+/** Degrees of space around the viewport so markers don't pop in at the edges */
+private const val VIEWPORT_MARGIN = 8.0
+
+/** Debounce for viewport-driven marker refreshes, in milliseconds */
+private const val MAP_LISTENER_DELAY = 128L
+
+/** Shared dot icon used when too many satellites are visible to label them */
+private var dotIcon: Drawable? = null
+
+/** Scratch list reused every frame to avoid per-tick allocation */
+private val visibleSats = ArrayList<Pair<OrbitalObject, GeoPos>>()
+
+/** Last emitted positions, replayed on scroll/zoom so culled markers appear without waiting for a tick */
+private var lastPositions: Map<OrbitalObject, GeoPos>? = null
+private var lastAction: ((OrbitalObject) -> Unit)? = null
+
 /** Pool of reusable Marker objects keyed by satellite name, to avoid re-creation every frame */
 private val markerPool = HashMap<String, Marker>()
 private var lastMapView: MapView? = null
@@ -727,13 +926,20 @@ private fun setPositions(
     action: (OrbitalObject) -> Unit
 ) {
     try {
+        lastPositions = posMap
+        lastAction = action
         // Clear caches when the MapView instance changes (e.g. config change)
         if (lastMapView !== mapView) {
             lastMapView = mapView
             markerPool.clear()
             iconCache.evictAll()
+            dotIcon = null
             footprintPolyline = null
             footprintPoints = null
+            mapView.addMapListener(DelayedMapListener(object : MapListener {
+                override fun onScroll(event: ScrollEvent?) = refreshPositions(mapView)
+                override fun onZoom(event: ZoomEvent?) = refreshPositions(mapView)
+            }, MAP_LISTENER_DELAY))
         }
         // Reuse the existing FolderOverlay — creating a new one and replacing it
         // causes osmdroid to detach shared Marker objects, making them invisible.
@@ -742,17 +948,48 @@ private fun setPositions(
         }
         folder.items.clear()
 
-        val activeNames = HashSet<String>(posMap.size)
-        posMap.forEach { (satellite, geoPos) ->
+        // Cull satellites outside the viewport: only meaningful once zoomed in, but that is
+        // exactly when marker labels are shown and drawing is most expensive.
+        visibleSats.clear()
+        if (mapView.width > 0 && mapView.height > 0) {
+            val box = mapView.boundingBox
+            val latNorth = box.latNorth + VIEWPORT_MARGIN
+            val latSouth = box.latSouth - VIEWPORT_MARGIN
+            val lonWest = box.lonWest - VIEWPORT_MARGIN
+            val lonEast = box.lonEast + VIEWPORT_MARGIN
+            val wrapsDateLine = box.lonWest > box.lonEast
+            for ((satellite, geoPos) in posMap) {
+                val lat = geoPos.latitude
+                if (lat !in latSouth..latNorth) continue
+                val lon = geoPos.longitude
+                val isLonVisible = if (wrapsDateLine) lon >= lonWest || lon <= lonEast
+                else lon in lonWest..lonEast
+                if (isLonVisible) visibleSats.add(satellite to geoPos)
+            }
+        } else {
+            for (entry in posMap) visibleSats.add(entry.key to entry.value)
+        }
+
+        val showLabels = visibleSats.size <= LABEL_LIMIT
+        val activeNames = HashSet<String>(visibleSats.size)
+        for ((satellite, geoPos) in visibleSats) {
             val name = satellite.data.name
             activeNames.add(name)
             val marker = markerPool.getOrPut(name) {
                 Marker(mapView).apply {
                     setInfoWindow(null)
                     setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_CENTER)
-                    icon = getCachedTextIcon(name, mapView)
+                    // Resolve the satellite via relatedObject so the listener is allocated
+                    // once per marker instead of once per satellite per tick
+                    setOnMarkerClickListener { clicked, _ ->
+                        (clicked.relatedObject as? OrbitalObject)?.let(action)
+                        true
+                    }
                 }
             }
+            marker.relatedObject = satellite
+            val icon = if (showLabels) getCachedTextIcon(name, mapView) else getDotIcon(mapView)
+            if (marker.icon !== icon) marker.icon = icon
             // Update position in-place — reuse existing GeoPoint if available
             val pos = marker.position
             if (pos != null) {
@@ -761,22 +998,34 @@ private fun setPositions(
             } else {
                 marker.position = GeoPoint(geoPos.latitude, geoPos.longitude)
             }
-            marker.setOnMarkerClickListener { _, _ ->
-                action(satellite)
-                true
-            }
             folder.add(marker)
         }
-        // Evict markers for satellites no longer tracked
-        val iter = markerPool.keys.iterator()
-        while (iter.hasNext()) {
-            if (iter.next() !in activeNames) iter.remove()
-        }
+        // Evict markers that are no longer tracked or no longer visible
+        markerPool.keys.retainAll(activeNames)
+        visibleSats.clear()
     } catch (e: Exception) {
         println(e)
     }
 }
 
+/** Re-applies the last known positions against the new viewport after a pan or zoom */
+private fun refreshPositions(mapView: MapView): Boolean {
+    // Grid mode disables the satellite layer — don't re-populate markers off-screen
+    if (mapView.overlays.getOrNull(OVERLAY_POSITIONS)?.isEnabled == false) return true
+    val posMap = lastPositions ?: return false
+    val action = lastAction ?: return false
+    setPositions(posMap, mapView, action)
+    mapView.invalidate()
+    return true
+}
+
+private fun getDotIcon(mapView: MapView): Drawable = dotIcon ?: run {
+    val size = 20
+    val bitmap = createBitmap(size, size)
+    Canvas(bitmap).drawCircle(size / 2f, size / 2f, size / 2f - 2f, textPaint)
+    bitmap.toDrawable(mapView.context.resources).also { dotIcon = it }
+}
+
 private fun getCachedTextIcon(name: String, mapView: MapView): Drawable {
     iconCache[name]?.let { return it }
     val labelRect = Rect()
@@ -927,6 +1176,11 @@ private fun rememberMapViewWithLifecycle(): MapView {
         MapView(context).apply {
             setMultiTouchControls(true)
             setUseDataConnection(false)
+            // Vertical map repetition wraps points below the viewport up to the
+            // top edge (osmdroid Y-wrap). Antarctica's full-circle ring then
+            // draws a full-height artifact line whenever its X range crosses
+            // the screen at low zoom. The map must never repeat vertically.
+            setVerticalMapRepetitionEnabled(false)
             setTileSource(tileSource)
             minZoomLevel = getMinZoom(resources.displayMetrics.heightPixels, isVertical)
             maxZoomLevel = 7.0
@@ -947,9 +1201,23 @@ private fun rememberMapViewWithLifecycle(): MapView {
         lifecycle.addObserver(lifecycleObserver)
         onDispose { lifecycle.removeObserver(lifecycleObserver) }
     }
+    // The overlay caches below are file-level (shared across MapView instances), so they must be
+    // released with the MapView or they keep the Activity and its bitmaps alive after disposal.
+    DisposableEffect(mapView) {
+        onDispose { clearMapCaches() }
+    }
     return mapView
 }
 
+private fun clearMapCaches() {
+    markerPool.clear()
+    iconCache.evictAll()
+    dotIcon = null
+    lastPositions = null
+    lastAction = null
+    lastMapView = null
+}
+
 @Composable
 private fun rememberMapViewLifecycleObserver(mapView: MapView) = remember(mapView) {
     LifecycleEventObserver { _, event ->

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

@@ -29,6 +29,8 @@ data class MapState(
     val isGridMode: Boolean = false,
     val workedGrids: Set<String> = emptySet(),
     val workedGridQsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>> = emptyMap(),
+    /** 4-char gridsquares the station operated from (LoTW MY_GRIDSQUARE) — blue stripes. */
+    val roamedGrids: Set<String> = emptySet(),
     val stationPosition: GeoPos? = null,
     val orbitalPass: OrbitalPass,
     val track: List<List<GeoPos>>? = null,
@@ -46,6 +48,7 @@ sealed interface MapAction {
     data class SelectItem(val item: OrbitalObject) : MapAction
     data class SelectDefaultItem(val catnum: Int) : MapAction
     data class ToggleGridMode(val value: Boolean) : MapAction
+    data class SetVisible(val isVisible: Boolean) : MapAction
 }
 
 data class MapData(

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

@@ -37,6 +37,7 @@ import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import com.rtbishop.look4sat.core.domain.utility.toTimerString
 import com.rtbishop.look4sat.core.presentation.getDefaultPass
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.cancelAndJoin
@@ -45,6 +46,7 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
@@ -69,6 +71,9 @@ class MapViewModel(
     private var dataUpdateJob: Job? = null
     private var dataUpdateRate = 1000L
     private var selectedOrbitalObject: OrbitalObject? = null
+
+    /** Gates the prediction loop so it doesn't burn CPU while the map isn't on screen */
+    private val isScreenVisible = MutableStateFlow(true)
     val uiState: StateFlow<MapState> = _uiState
 
     init {
@@ -82,7 +87,8 @@ class MapViewModel(
                 _uiState.update {
                     it.copy(
                         workedGrids = settingsRepo.getWorkedGrids(),
-                        workedGridQsos = settingsRepo.getWorkedGridQsos()
+                        workedGridQsos = settingsRepo.getWorkedGridQsos(),
+                        roamedGrids = settingsRepo.getRoamedGrids()
                     )
                 }
             }
@@ -99,6 +105,7 @@ class MapViewModel(
             is MapAction.SelectItem -> selectSatellite(action.item)
             is MapAction.SelectDefaultItem -> selectDefaultSatellite(action.catnum)
             is MapAction.ToggleGridMode -> settingsRepo.updateOtherSettings { it.copy(stateOfMapGrid = action.value) }
+            is MapAction.SetVisible -> isScreenVisible.value = action.isVisible
         }
     }
 
@@ -136,7 +143,11 @@ class MapViewModel(
         selectedOrbitalObject = orbitalObject
         viewModelScope.launch {
             dataUpdateJob?.cancelAndJoin()
-            dataUpdateJob = launch {
+            // Default dispatcher is mandatory: viewModelScope is Main.immediate, and every
+            // satelliteRepo call internally hops to Default and resumes back on the caller's
+            // dispatcher. On Main that posts one continuation per satellite per tick, which
+            // floods the looper and ANRs for users tracking thousands of objects.
+            dataUpdateJob = launch(Dispatchers.Default) {
                 val dateNow = Date()
                 getStationPosition()
                 getSatTrack(orbitalObject, stationPos, dateNow)
@@ -147,6 +158,8 @@ class MapViewModel(
                     else -> updateFreq
                 }
                 while (isActive) {
+                    // Suspends while the map is off-screen instead of predicting into the void
+                    isScreenVisible.first { it }
                     dateNow.time = System.currentTimeMillis()
                     updateMapState(orbitalObject, allSatellites, stationPos, dateNow)
                     delay(effectiveRate)

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesScreen.kt

@@ -85,22 +85,20 @@ import java.util.TimeZone
 
 @Composable
 fun PassesDestination(
-    navigateToRadar: (Int, Long) -> Unit,
-    navigateToMap: () -> Unit
+    navigateToRadar: (Int, Long) -> Unit
 ) {
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val viewModel: PassesViewModel = viewModel(factory = PassesViewModel.factory(container))
     val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
-    PassesScreen(uiState, viewModel::onAction, navigateToRadar, navigateToMap)
+    PassesScreen(uiState, viewModel::onAction, navigateToRadar)
 }
 
 @Composable
 private fun PassesScreen(
     uiState: PassesState,
     onAction: (PassesAction) -> Unit,
-    navigateToRadar: (Int, Long) -> Unit,
-    navigateToMap: () -> Unit
+    navigateToRadar: (Int, Long) -> Unit
 ) {
     if (uiState.isPassesDialogShown) {
         PassesFilterDialog(
@@ -158,7 +156,7 @@ private fun PassesScreen(
             TopBar(
                 isVerticalLayout = isVerticalLayout,
                 startAction = {
-                    IconCard(action = { onAction(PassesAction.TogglePassesDialog) }, resId = R.drawable.ic_filter)
+                    IconCard(action = { onAction(PassesAction.ToggleRadiosDialog) }, resId = R.drawable.ic_radios)
                 },
                 topInfo = {
                     TimerRow(timeString = uiState.nextTime, isTimeAos = uiState.isNextTimeAos)
@@ -167,7 +165,7 @@ private fun PassesScreen(
                     NextPassRow(pass = uiState.nextPass, isUtc = uiState.isUtc)
                 },
                 endAction = {
-                    IconCard(action = navigateToMap, resId = R.drawable.ic_map)
+                    IconCard(action = { onAction(PassesAction.TogglePassesDialog) }, resId = R.drawable.ic_filter)
                 }
             )
         }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesViewModel.kt

@@ -175,9 +175,12 @@ class PassesViewModel(
         val sdfDate = dateFormat(tz)
         val sdfTime = SimpleDateFormat("HH:mm", Locale.getDefault()).also { it.timeZone = tz }
         val result = LinkedHashMap<String, Pair<String, String>>()
-        // DeepSpace group always shows today's sun times
+        // DeepSpace group always shows today's sun times.
+        // The natural-day anchor is the DEVICE timezone, not the display timezone:
+        // UTC midnight is 08:00 local for UTC+8 stations, when the sun is already
+        // up — that would trip the white-night guard and render "--:--".
         if (passes.any { it.isDeepSpace }) {
-            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(System.currentTimeMillis(), tz))
+            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(System.currentTimeMillis(), TimeZone.getDefault()))
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result["DeepSpace (period >225min)"] = rise to set
@@ -186,7 +189,7 @@ class PassesViewModel(
             if (pass.isDeepSpace) continue
             val label = sdfDate.format(Date(pass.aosTime))
             if (label in result) continue
-            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(pass.aosTime, tz))
+            val riseSet = findTodaySunRiseSet(stationPos, startOfDayMillis(pass.aosTime, TimeZone.getDefault()))
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result[label] = rise to set

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

@@ -32,8 +32,11 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.asPaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.navigationBars
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.pager.HorizontalPager
 import androidx.compose.foundation.pager.rememberPagerState
@@ -84,7 +87,7 @@ private enum class RadarPage(val title: String) {
 }
 
 @Composable
-fun RadarDestination(navigateUp: () -> Unit, navigateToMap: () -> Unit) {
+fun RadarDestination(navigateUp: () -> Unit) {
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val viewModel: RadarViewModel = viewModel(factory = RadarViewModel.factory(container))
@@ -96,12 +99,6 @@ fun RadarDestination(navigateUp: () -> Unit, navigateToMap: () -> Unit) {
         }
         navigateUp()
     }
-    val navigateToMapAndClearMutual = {
-        if (container.mutualPassData.value.endTime > 0L) {
-            container.setMutualPassData(MutualPassData())
-        }
-        navigateToMap()
-    }
     LaunchedEffect(mutualData.endTime) {
         if (mutualData.endTime <= 0L) return@LaunchedEffect
         while (true) {
@@ -127,7 +124,7 @@ fun RadarDestination(navigateUp: () -> Unit, navigateToMap: () -> Unit) {
         viewModel.onAction(RadarAction.SstvPermissionResult(granted))
         viewModel.onAction(RadarAction.CwPermissionResult(granted))
     }
-    RadarScreen(uiState, viewModel::onAction, navigateUpAndClearMutual, navigateToMapAndClearMutual, mutualData, requestMicPermission = {
+    RadarScreen(uiState, viewModel::onAction, navigateUpAndClearMutual, mutualData, requestMicPermission = {
         permissionLauncher.launch(Manifest.permission.RECORD_AUDIO)
     })
 }
@@ -137,11 +134,14 @@ private fun RadarScreen(
     uiState: RadarState,
     onAction: (RadarAction) -> Unit,
     navigateUp: () -> Unit,
-    navigateToMap: () -> Unit,
     mutualData: MutualPassData,
     requestMicPermission: () -> 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)
+    val addToCalendar: () -> Unit = {
+        uiState.currentPass?.let { onAction(RadarAction.AddToCalendar(it.name, it.aosTime, it.losTime)) }
+    }
     // Station-B overlay: full track line (only where B's elevation > 0) + live position dot
     // at the current moment, same display mode as the local station.
     val trackB = remember(mutualData.trackSamples) {
@@ -169,6 +169,7 @@ private fun RadarScreen(
     Column(
         modifier = Modifier
             .layoutPadding()
+            .padding(bottom = WindowInsets.navigationBars.asPaddingValues().calculateBottomPadding())
             .keepScreenOn(),
         verticalArrangement = Arrangement.spacedBy(6.dp)
     ) {
@@ -177,7 +178,7 @@ private fun RadarScreen(
             TopBar {
                 IconCard(action = navigateUp, resId = R.drawable.ic_back)
                 TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isTimeAos)
-                IconCard(action = navigateToMap, resId = R.drawable.ic_map)
+                IconCard(action = addToCalendar, resId = R.drawable.ic_calendar)
             }
             TopBar { NextPassRow(pass = upcomingPass, isUtc = uiState.isUtc) }
         } else {
@@ -185,7 +186,7 @@ private fun RadarScreen(
                 IconCard(action = navigateUp, resId = R.drawable.ic_back)
                 TimerRow(timeString = uiState.currentTime, isTimeAos = uiState.isTimeAos)
                 NextPassRow(pass = upcomingPass, modifier = Modifier.weight(1f), isUtc = uiState.isUtc)
-                IconCard(action = navigateToMap, resId = R.drawable.ic_map)
+                IconCard(action = addToCalendar, resId = R.drawable.ic_calendar)
             }
         }
         if (isVertical) {

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

@@ -48,6 +48,8 @@ import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.navigationBars
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material3.Button
 import androidx.compose.material3.FilterChip
@@ -78,6 +80,7 @@ import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.TextStyle
@@ -123,7 +126,21 @@ fun TransceiversPage(
                 }
             }
         }
-        LazyColumn(modifier = modifier.fillMaxSize(), state = listState) {
+        // contentPadding for the system navigation bar: the radar page is a
+        // full-screen destination, so on gesture-nav devices the translucent
+        // nav bar floats over the list bottom and covers the CW decoder's
+        // decoded-text output when the panel is scrolled to the end. Padding
+        // the last item above the bar fixes it (three-button nav already
+        // resizes the window, where this padding is a harmless no-op).
+        LazyColumn(
+            modifier = modifier.fillMaxSize(),
+            state = listState,
+            contentPadding = PaddingValues(
+                bottom = with(LocalDensity.current) {
+                    (WindowInsets.navigationBars.getBottom(this) / density).dp
+                }
+            )
+        ) {
             itemsIndexed(items = transceivers, key = { _, radio -> radio.uuid }) { _, radio ->
                 val isExpanded = radio.uuid == selectedUuid
                 TransceiverItem(

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

@@ -207,6 +207,7 @@ class SettingsViewModel(
                     // synced set fully replaces the stored worked grids.
                     settingsRepo.setWorkedGrids(result.grids)
                     settingsRepo.setWorkedGridQsos(result.qsos)
+                    settingsRepo.setRoamedGrids(result.roamedGrids)
                     _uiState.update { state ->
                         state.copy(
                             lotwSyncing = false, workedGridsCount = result.grids.size,

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "468"
+appVersionCode = "473"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.6-ba7opf.9.18"
+appVersionName = "4.4.7-ba7opf.3"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry