chore: bump version to 4.4.6-ba7opf.9.8

- LoTW sync now stores per-QSO detail (call/time/sat/mode/bands) grouped by
  gridsquare (PROP_MODE=SAT only), single JSON blob in SharedPreferences
- GridQso model derives band label (V/U, U/V, V/A...) from BAND_RX/BAND
- Tap detection via osmdroid MapEventsOverlay; selected grid outlined green
- Centered dialog: calls sorted by first-contact time, first-QSO summary,
  expandable call rows list subsequent QSOs in that grid; tap outside closes

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

@@ -57,15 +57,25 @@ class LoTWRepository : ILoTWRepository {
             }
             try {
                 val connection = URL("$BASE_URL?$query").openConnection() as HttpURLConnection
-                connection.connectTimeout = 15_000
-                connection.readTimeout = 60_000
+                // ARRL can be slow to accept connections from mobile networks
+                // (long TLS handshakes across the Pacific, occasional server-side
+                // queueing). 30s connect + 120s read gives the request enough
+                // headroom; the sync button stays disabled meanwhile so users
+                // see progress rather than a hung dialog.
+                connection.connectTimeout = 30_000
+                connection.readTimeout = 120_000
                 connection.requestMethod = "GET"
+                connection.setRequestProperty("Accept-Encoding", "gzip")
+                connection.instanceFollowRedirects = true
                 val code = connection.responseCode
                 if (code !in 200..299) {
                     connection.disconnect()
                     return@withContext null
                 }
-                val body = connection.inputStream.bufferedReader().use { it.readText() }
+                val stream = connection.inputStream
+                val body = ("gzip".equals(connection.contentEncoding, ignoreCase = true))
+                    .let { gz -> if (gz) java.util.zip.GZIPInputStream(stream) else stream }
+                    .bufferedReader().use { it.readText() }
                 connection.disconnect()
                 if (body.contains(" password=") && !body.startsWith("ARRL")) return@withContext null
                 parseConfirmedGrids(body)
@@ -75,6 +85,145 @@ class LoTWRepository : ILoTWRepository {
             }
         }
 
+    override suspend fun fetchConfirmedGridQsos(
+        callsign: String,
+        password: String
+    ): Pair<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>>? {
+        // Single report fetch: grids are derived from the same body as the
+        // per-QSO detail (avoids a second ARRL hit and keeps the two datasets
+        // perfectly consistent).
+        val body = fetchReportBody(callsign, password) ?: return null
+        val grids = parseConfirmedGrids(body) ?: return null
+        val qsos = parseConfirmedGridQsos(body) ?: return null
+        return grids to qsos
+    }
+
+    private fun fetchReportBody(callsign: String, password: String): String? {
+        val call = callsign.trim().uppercase()
+        val pwd = password.trim()
+        if (call.isBlank() || pwd.isBlank()) return null
+        val since = "2000-01-01"
+        val query = buildString {
+            append("login=").append(URLEncoder.encode(call, "UTF-8"))
+            append("&password=").append(URLEncoder.encode(pwd, "UTF-8"))
+            append("&qso_query=1&qso_qsl=yes&qso_qsldetail=yes&qso_mydetail=yes")
+            append("&qso_qslsince=").append(URLEncoder.encode(since, "UTF-8"))
+        }
+        return try {
+            val connection = URL("$BASE_URL?$query").openConnection() as HttpURLConnection
+            connection.connectTimeout = 30_000
+            connection.readTimeout = 120_000
+            connection.requestMethod = "GET"
+            connection.setRequestProperty("Accept-Encoding", "gzip")
+            connection.instanceFollowRedirects = true
+            val code = connection.responseCode
+            if (code !in 200..299) {
+                connection.disconnect()
+                return null
+            }
+            val stream = connection.inputStream
+            val body = ("gzip".equals(connection.contentEncoding, ignoreCase = true))
+                .let { gz -> if (gz) java.util.zip.GZIPInputStream(stream) else stream }
+                .bufferedReader().use { it.readText() }
+            connection.disconnect()
+            if (body.contains(" password=") && !body.startsWith("ARRL")) return null
+            body
+        } catch (e: Exception) {
+            println("LoTWRepository fetch failure: $e")
+            null
+        }
+    }
+
+    internal fun parseConfirmedGridQsos(
+        body: String
+    ): Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>? {
+        if (!body.contains("<eoh>", ignoreCase = true)) return null
+        // One ADIF record = fields up to <EOR>. We buffer the fields we care
+        // about, then emit a GridQso on <EOR> when the record is a satellite
+        // QSO (PROP_MODE=SAT) carrying a grid.
+        val result = mutableMapOf<String, MutableList<com.rtbishop.look4sat.core.domain.model.GridQso>>()
+        var propMode: String? = null
+        var call = ""
+        var qsoDate = ""
+        var timeOn = ""
+        var satName = ""
+        var mode = ""
+        var bandUp = ""
+        var bandDown = ""
+        val gridsInRecord = mutableListOf<String>()
+
+        fun emitRecord() {
+            if (propMode != "SAT" || gridsInRecord.isEmpty()) return
+            val epochMs = adifTimestampToEpoch(qsoDate, timeOn)
+            val qso = com.rtbishop.look4sat.core.domain.model.GridQso(
+                call = call, epochMs = epochMs, satName = satName,
+                mode = mode, bandUp = bandUp, bandDown = bandDown
+            )
+            for (grid in gridsInRecord) {
+                result.getOrPut(grid) { mutableListOf() }.add(qso)
+            }
+        }
+
+        fun resetRecord() {
+            propMode = null; call = ""; qsoDate = ""; timeOn = ""
+            satName = ""; mode = ""; bandUp = ""; bandDown = ""
+            gridsInRecord.clear()
+        }
+
+        for (raw in body.lineSequence()) {
+            val line = raw.trim()
+            when {
+                line.equals("<EOR>", ignoreCase = true) -> {
+                    emitRecord()
+                    resetRecord()
+                }
+                line.startsWith("<PROP_MODE:") ->
+                    propMode = adifValue(line).uppercase()
+                line.startsWith("<CALL:") ->
+                    call = adifValue(line).uppercase()
+                line.startsWith("<QSO_DATE:") ->
+                    qsoDate = adifValue(line)
+                line.startsWith("<TIME_ON:") ->
+                    timeOn = adifValue(line)
+                line.startsWith("<SAT_NAME:") ->
+                    satName = adifValue(line)
+                line.startsWith("<MODE:") ->
+                    mode = adifValue(line)
+                line.startsWith("<BAND_RX:") ->
+                    bandUp = adifValue(line).uppercase()
+                line.startsWith("<BAND:") && !line.startsWith("<BAND_RX:") ->
+                    bandDown = adifValue(line).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
+                    // several squares; split and keep every 4-char field.
+                    adifValue(line).split(',').forEach { grid ->
+                        val field = grid.trim().uppercase()
+                        if (field.length >= 4) gridsInRecord.add(field.take(4))
+                    }
+                }
+            }
+        }
+        return result
+    }
+
+    /** ADIF field value: "<GRIDSQUARE:4>OL62" -> "OL62". */
+    private fun adifValue(line: String): String =
+        line.substringAfter('>').substringBefore("E<").trim()
+
+    /** "20260820" + "1130" (or "113000") -> UTC epoch ms; 0 when unparseable. */
+    private fun adifTimestampToEpoch(date: String, time: String): Long = try {
+        val d = date.trim()
+        val t = time.trim().padEnd(6, '0').take(6)
+        val fmt = java.time.format.DateTimeFormatterBuilder()
+            .appendPattern("yyyyMMddHHmmss")
+            .toFormatter()
+            .withZone(java.time.ZoneOffset.UTC)
+        java.time.Instant.from(fmt.parse(d + t)).toEpochMilli()
+    } catch (_: Exception) {
+        0L
+    }
+
     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
@@ -84,14 +233,33 @@ class LoTWRepository : ILoTWRepository {
         // (LoTW writes it lowercase). Match case-insensitively to be safe.
         if (!body.contains("<eoh>", ignoreCase = true)) return null
         val grids = mutableSetOf<String>()
+        // ADIF fields of one QSO record span multiple lines and are terminated by
+        // <EOR>. Satellite QSOs carry <PROP_MODE:3>SAT (plus <SAT_NAME>); ground
+        // 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.
+        var propMode: String? = null
         for (raw in body.lineSequence()) {
             val line = raw.trim()
-            val value = when {
-                line.startsWith("<GRIDSQUARE:") -> line.substringAfter('>')
-                line.startsWith("<VUCC_GRIDS:") -> line.substringAfter('>')
-                else -> continue
-            }.substringBefore("E<").trim().uppercase()
-            if (value.length >= 4) grids.add(value.take(4))
+            when {
+                line.equals("<EOR>", ignoreCase = true) -> propMode = null
+                line.startsWith("<PROP_MODE:") -> {
+                    propMode = line.substringAfter('>').substringBefore("E<").trim().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))
+                        }
+                    }
+                }
+            }
         }
         return grids
     }

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

@@ -179,6 +179,57 @@ class SettingsRepo(
         preferences.edit { putString(keyWorkedGrids, array.toString()) }
     }
 
+    // Confirmed satellite QSOs per worked gridsquare, persisted as a single JSON
+    // object: {"OL62":[{"c":call,"t":epochMs,"s":sat,"m":mode,"bu":up,"bd":down}]}.
+    private val keyWorkedGridQsos = "workedGridQsos"
+
+    override fun getWorkedGridQsos(): Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>> {
+        val json = preferences.getString(keyWorkedGridQsos, null).orEmpty()
+        if (json.isBlank()) return emptyMap()
+        return try {
+            val root = org.json.JSONObject(json)
+            val result = mutableMapOf<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>()
+            for (grid in root.keys()) {
+                val array = root.optJSONArray(grid) ?: continue
+                val list = (0 until array.length()).mapNotNull { i ->
+                    val o = array.optJSONObject(i) ?: return@mapNotNull null
+                    com.rtbishop.look4sat.core.domain.model.GridQso(
+                        call = o.optString("c"),
+                        epochMs = o.optLong("t"),
+                        satName = o.optString("s"),
+                        mode = o.optString("m"),
+                        bandUp = o.optString("bu"),
+                        bandDown = o.optString("bd")
+                    )
+                }
+                if (list.isNotEmpty()) result[grid] = list
+            }
+            result
+        } catch (_: Exception) {
+            emptyMap()
+        }
+    }
+
+    override fun setWorkedGridQsos(qsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>) {
+        val root = org.json.JSONObject()
+        for ((grid, list) in qsos) {
+            val array = org.json.JSONArray()
+            for (q in list) {
+                array.put(
+                    org.json.JSONObject()
+                        .put("c", q.call)
+                        .put("t", q.epochMs)
+                        .put("s", q.satName)
+                        .put("m", q.mode)
+                        .put("bu", q.bandUp)
+                        .put("bd", q.bandDown)
+                )
+            }
+            root.put(grid, array)
+        }
+        preferences.edit { putString(keyWorkedGridQsos, root.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/repository/UpdateRepository.kt

@@ -58,6 +58,14 @@ class UpdateRepository(
         val title = Regex("<title>(.*?)</title>", RegexOption.DOT_MATCHES_ALL)
             .find(html)?.groupValues?.get(1)?.trim()
             ?.substringBefore("·")?.removePrefix("Release")?.trim() ?: tag
+        // Release notes live in the page's markdown-body section (first occurrence
+        // is the release description). Strip HTML tags for plain-text display.
+        val raw = Regex("<div[^>]*class=\"[^\"]*markdown-body[^\"]*\"[^>]*>(.*?)</div>", RegexOption.DOT_MATCHES_ALL)
+            .find(html)?.groupValues?.get(1) ?: ""
+        val body = raw.replace(Regex("<[^>]+>"), "")
+            .replace("&lt;", "<").replace("&gt;", ">").replace("&amp;", "&")
+            .replace("&quot;", "\"").replace("&#39;", "'")
+            .trim()
         // The release APK asset follows the fixed naming scheme used by the build:
         // Look4Sat-<tag without leading v>-release.apk. When the page was fetched
         // through an accelerator mirror (https://<mirror>/https://github.com/...),
@@ -72,7 +80,7 @@ class UpdateRepository(
         return LatestRelease(
             versionTag = tag,
             title = title,
-            body = "",
+            body = body,
             apkUrl = apkUrl
         )
     }

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

@@ -19,6 +19,7 @@ package com.rtbishop.look4sat.core.data.repository
 
 import com.rtbishop.look4sat.core.domain.model.DataSourcesSettings
 import com.rtbishop.look4sat.core.domain.model.DatabaseState
+import com.rtbishop.look4sat.core.domain.model.GridQso
 import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
@@ -214,7 +215,10 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     )
 
     override val otherSettings: StateFlow<OtherSettings> = MutableStateFlow(
-        OtherSettings(false, false, false, false, false, false, false, false)
+        OtherSettings(
+            false, false, false, false, false, false, false,
+            shouldSeeWarning = false, shouldSeeWhatsNew = false
+        )
     )
 
     override val dataSourcesSettings: MutableStateFlow<DataSourcesSettings> = MutableStateFlow(dataSources)
@@ -270,6 +274,28 @@ private class FakeSettingsRepo(dataSources: DataSourcesSettings = defaultDataSou
     override fun getAmSatCallsign(): String = ""
 
     override fun setAmSatCallsign(callsign: String) = Unit
+
+    override val wavelogSettings: StateFlow<com.rtbishop.look4sat.core.domain.model.WavelogSettings> =
+        MutableStateFlow(com.rtbishop.look4sat.core.domain.model.WavelogSettings())
+
+    override fun updateWavelogSettings(settings: com.rtbishop.look4sat.core.domain.model.WavelogSettings) = Unit
+
+    override fun getWorkedGrids(): Set<String> = emptySet()
+
+    private val workedGrids = MutableStateFlow(emptySet<String>())
+
+    override fun setWorkedGrids(grids: Set<String>) {
+        workedGrids.value = grids
+    }
+
+    override val lotwSettings: StateFlow<com.rtbishop.look4sat.core.domain.model.LoTWSettings> =
+        MutableStateFlow(com.rtbishop.look4sat.core.domain.model.LoTWSettings())
+
+    override fun updateLoTWSettings(settings: com.rtbishop.look4sat.core.domain.model.LoTWSettings) = Unit
+
+    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
 }
 
 private fun defaultDataSourcesSettings(): DataSourcesSettings {

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

@@ -0,0 +1,131 @@
+package com.rtbishop.look4sat.core.data.repository
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class LoTWRepositoryTest {
+
+    private val repo = LoTWRepository()
+
+    private fun report(vararg records: String): String =
+        buildString {
+            append("<ADIF_VERS:5>3.1.4\n")
+            append("<PROGRAMID:8>look4sat\n")
+            append("<eoh>\n")
+            records.forEach { append(it).append("\n") }
+        }
+
+    @Test
+    fun parseRejectsBodyWithoutEoh() {
+        assertNull(repo.parseConfirmedGrids("<HTML>Username/password incorrect</HTML>"))
+    }
+
+    @Test
+    fun parseCollectsOnlySatelliteGrids() {
+        // Satellite QSO: PROP_MODE SAT, confirmed, opponent grid.
+        val satQso = "<CALL:6>BA7OPF\n" +
+            "<QSO_DATE:8>20260820\n" +
+            "<PROP_MODE:3>SAT\n" +
+            "<SAT_NAME:5>FO-29\n" +
+            "<GRIDSQUARE:4>NL47\n" +
+            "<EOR>\n"
+        // Ground QSO: same grid but no PROP_MODE -> must be excluded.
+        val groundQso = "<CALL:6>BA7OPF\n" +
+            "<QSO_DATE:8>20260821\n" +
+            "<GRIDSQUARE:4>NL47\n" +
+            "<EOR>\n"
+        val result = repo.parseConfirmedGrids(report(satQso, groundQso))
+        assertEquals(setOf("NL47"), result)
+    }
+
+    @Test
+    fun parseSupportsVuccGridPairsAndSixCharGrids() {
+        val satQso = "<PROP_MODE:3>SAT\n" +
+            "<SAT_NAME:5>SO-50\n" +
+            "<GRIDSQUARE:6>OM60IL\n" +
+            "<VUCC_GRIDS:11>EN52en,EN53fa\n" +
+            "<EOR>\n"
+        val result = repo.parseConfirmedGrids(report(satQso))
+        assertEquals(setOf("OM60", "EN52", "EN53"), result)
+    }
+
+    @Test
+    fun parsePropModeDoesNotLeakAcrossRecords() {
+        // PROP_MODE SAT record first, then a ground QSO with a grid — the second
+        // record must not inherit the satellite flag after its own <EOR>.
+        val satQso = "<PROP_MODE:3>SAT\n<GRIDSQUARE:4>OL62\n<EOR>\n"
+        val groundQso = "<GRIDSQUARE:4>PM00\n<EOR>\n"
+        val result = repo.parseConfirmedGrids(report(satQso, groundQso))
+        assertEquals(setOf("OL62"), result)
+    }
+
+    @Test
+    fun parseReturnsEmptySetForReportWithoutGrids() {
+        val satQso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>AO-07\n<EOR>\n"
+        assertEquals(emptySet<String>(), repo.parseConfirmedGrids(report(satQso)))
+    }
+
+    // region parseConfirmedGridQsos
+
+    private val satQsoFull = "<CALL:5>A50QO\n" +
+        "<QSO_DATE:8>20260820\n" +
+        "<TIME_ON:6>113045\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"
+
+    @Test
+    fun parseQsosExtractsSatelliteDetail() {
+        val result = repo.parseConfirmedGridQsos(report(satQsoFull))!!
+        val qsos = result["NL47"]!!
+        assertEquals(1, qsos.size)
+        val qso = qsos[0]
+        assertEquals("A50QO", qso.call)
+        assertEquals("FO-29", qso.satName)
+        assertEquals("CW", qso.mode)
+        assertEquals("2M", qso.bandUp)
+        assertEquals("70CM", qso.bandDown)
+        assertEquals("V/U", qso.bandLabel)
+        assertEquals(2026, java.time.Instant.ofEpochMilli(qso.epochMs).atZone(java.time.ZoneOffset.UTC).year)
+    }
+
+    @Test
+    fun parseQsosExcludesGroundQsos() {
+        val groundQso = "<CALL:6>BA7OPF\n<QSO_DATE:8>20260821\n<GRIDSQUARE:4>NL47\n<EOR>\n"
+        val result = repo.parseConfirmedGridQsos(report(satQsoFull, groundQso))!!
+        assertEquals(1, result["NL47"]!!.size)
+    }
+
+    @Test
+    fun parseQsosVuccPairFeedsBothGrids() {
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n" +
+            "<QSO_DATE:8>20260819\n<TIME_ON:4>1231\n" +
+            "<VUCC_GRIDS:11>EN52en,EN53fa\n<EOR>\n"
+        val result = repo.parseConfirmedGridQsos(report(qso))!!
+        assertEquals(setOf("EN52", "EN53"), result.keys)
+        assertEquals(result["EN52"]!!.first(), result["EN53"]!!.first())
+    }
+
+    @Test
+    fun parseQsosVuccQuadrupleFeedsAllFourGrids() {
+        // VUCC allows up to four grids in one contact.
+        val qso = "<PROP_MODE:3>SAT\n<SAT_NAME:5>SO-50\n" +
+            "<QSO_DATE:8>20260819\n<TIME_ON:4>1231\n" +
+            "<VUCC_GRIDS:23>EN52en,EN53fa,EN42gj,EN43kh\n<EOR>\n"
+        val result = repo.parseConfirmedGridQsos(report(qso))!!
+        assertEquals(setOf("EN52", "EN53", "EN42", "EN43"), result.keys)
+        result.values.forEach { assertEquals(1, it.size) }
+    }
+
+    @Test
+    fun parseQsosRejectsBodyWithoutEoh() {
+        assertNull(repo.parseConfirmedGridQsos("<HTML>Username/password incorrect</HTML>"))
+    }
+
+    // endregion
+}

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

@@ -0,0 +1,64 @@
+/*
+ * 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.model
+
+/**
+ * One confirmed satellite QSO as reported by LoTW, kept per worked gridsquare
+ * so the map can show, for any worked grid, which callsigns were worked there
+ * and when.
+ *
+ * @param call      opposite station callsign (as logged by the opposite op)
+ * @param epochMs   QSO date+time in UTC milliseconds
+ * @param satName   satellite name (e.g. "FO-29")
+ * @param mode      ADIF mode (FM / CW / SSB ...)
+ * @param bandUp    uplink band as reported by LoTW (BAND_RX: "70CM", "2M", "10M"...)
+ * @param bandDown  downlink band (BAND: "2M", "70CM"...) — may be empty when
+ *                  LoTW did not include it
+ */
+data class GridQso(
+    val call: String,
+    val epochMs: Long,
+    val satName: String,
+    val mode: String,
+    val bandUp: String,
+    val bandDown: String
+) {
+    /** Short uplink/downlink band label ("U/V", "V/A"), or "" when unknown. */
+    val bandLabel: String
+        get() {
+            val up = bandAbbrev(bandUp)
+            val down = bandAbbrev(bandDown)
+            return when {
+                up.isNotEmpty() && down.isNotEmpty() -> "$up/$down"
+                up.isNotEmpty() -> up
+                else -> ""
+            }
+        }
+
+    private fun bandAbbrev(band: String): String = when (band.trim().uppercase()) {
+        "70CM" -> "U"
+        "2M" -> "V"
+        "10M" -> "A"
+        "6M" -> "V"
+        "1.2G" -> "L"
+        "2.4G" -> "S"
+        "23CM" -> "L"
+        "13CM" -> "S"
+        else -> band.trim().uppercase()
+    }
+}

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

@@ -25,4 +25,14 @@ interface ILoTWRepository {
      * Returns the 4-char grid set, or null on any failure (network / bad credentials).
      */
     suspend fun fetchConfirmedGrids(callsign: String, password: String): Set<String>?
+
+    /**
+     * Same report, but keeps the per-QSO detail of every confirmed satellite
+     * QSO (call / time / satellite / mode / bands), grouped by worked 4-char
+     * gridsquare. Returns null on any failure.
+     */
+    suspend fun fetchConfirmedGridQsos(
+        callsign: String,
+        password: String
+    ): Pair<Set<String>, Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>>>?
 }

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

@@ -99,6 +99,9 @@ interface ISettingsRepo {
     fun updateWavelogSettings(settings: WavelogSettings)
     fun getWorkedGrids(): Set<String>
     fun setWorkedGrids(grids: Set<String>)
+    /** 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>>)
     //endregion
 
     //region # LoTW confirmed-grids settings

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

@@ -210,12 +210,20 @@ fun RowScope.NextPassRow(pass: OrbitalPass, modifier: Modifier = Modifier, isUtc
 }
 
 @Composable
-fun CardButton(onClick: () -> Unit, text: String, modifier: Modifier = Modifier) {
+fun CardButton(
+    onClick: () -> Unit,
+    text: String,
+    modifier: Modifier = Modifier,
+    isEnabled: Boolean = true
+) {
     ElevatedButton(
         onClick = onClick,
+        enabled = isEnabled,
         colors = ButtonDefaults.buttonColors(
             containerColor = MaterialTheme.colorScheme.surfaceVariant,
-            contentColor = MaterialTheme.colorScheme.onSurfaceVariant
+            contentColor = MaterialTheme.colorScheme.onSurfaceVariant,
+            disabledContainerColor = MaterialTheme.colorScheme.surfaceVariant,
+            disabledContentColor = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.4f)
         ),
         shape = MaterialTheme.shapes.small,
         modifier = modifier,
@@ -316,9 +324,21 @@ fun InfoDialog(
 
 @Composable
 fun SharedDialog(
-    title: String, onCancel: () -> Unit, onAccept: () -> Unit, content: @Composable () -> Unit
+    title: String,
+    onCancel: () -> Unit,
+    onAccept: () -> Unit,
+    acceptText: String? = null,
+    acceptEnabled: Boolean = true,
+    content: @Composable () -> Unit
 ) {
-    SharedDialog(title = title, onDismissRequest = onCancel, onCancel = onCancel, onAccept = onAccept) { _ ->
+    SharedDialog(
+        title = title,
+        onDismissRequest = onCancel,
+        onCancel = onCancel,
+        onAccept = onAccept,
+        acceptText = acceptText,
+        acceptEnabled = acceptEnabled
+    ) { _ ->
         content()
     }
 }
@@ -329,6 +349,8 @@ fun SharedDialog(
     onDismissRequest: () -> Unit,
     onCancel: (() -> Unit)? = null,
     onAccept: (() -> Unit)? = null,
+    acceptText: String? = null,
+    acceptEnabled: Boolean = true,
     titleFontSize: Int = 16,
     titleTextAlign: TextAlign = if (onCancel != null && onAccept != null) TextAlign.Center else TextAlign.Start,
     content: @Composable (padding: Dp) -> Unit
@@ -356,7 +378,11 @@ fun SharedDialog(
                     .padding(horizontal = if (onCancel != null && onAccept != null) padding else 0.dp)
             )
             if (onAccept != null) {
-                CardButton(onClick = onAccept, text = stringResource(R.string.btn_accept))
+                CardButton(
+                    onClick = onAccept,
+                    text = acceptText ?: stringResource(R.string.btn_accept),
+                    isEnabled = acceptEnabled
+                )
             }
         }
         content(padding)

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

@@ -0,0 +1,142 @@
+package com.rtbishop.look4sat.core.presentation
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.graphics.drawscope.rotate
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import kotlin.math.atan2
+import kotlin.math.cos
+import kotlin.math.sin
+import kotlin.math.sqrt
+
+/**
+ * Format a Maidenhead locator for display. Per IARU convention and the user's
+ * preference: field letters (1-2) and square digits (3-4) uppercase, sub-square
+ * letters (5-6 of a 6/8-char locator) lowercase, e.g. "OL62" / "OL62kl".
+ */
+fun formatGridDisplay(grid: String): String? {
+    val g = grid.trim().uppercase()
+    if (g.length !in listOf(4, 6, 8) || g.any { !it.isLetterOrDigit() }) return null
+    if (g.length == 4) return g
+    if (g.length == 6) return g.take(4) + g.drop(4).lowercase()
+    return g.take(4) + g.drop(4).take(2).lowercase() + g.drop(6)
+}
+
+/**
+ * Top-bar chip for the mutual-match screen: navigation needle (rotated by the
+ * great-circle bearing to the target grid, 0 deg = north), grid locator and
+ * distance. Shows a dimmed placeholder when no target grid is entered.
+ */
+@Composable
+fun GridTargetChip(
+    grid: String?,
+    distanceKm: Double?,
+    bearingDeg: Double?,
+    modifier: Modifier = Modifier
+) {
+    val configured = grid != null && distanceKm != null && bearingDeg != null
+    // The app's signature accent yellow (MaterialTheme primary in both themes).
+    val accent = MaterialTheme.colorScheme.primary
+    val placeholder = MaterialTheme.colorScheme.onSurfaceVariant
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(8.dp),
+        modifier = modifier
+            .height(36.dp)
+            .background(
+                color = MaterialTheme.colorScheme.surface.copy(alpha = if (configured) 0.9f else 0.45f),
+                shape = RoundedCornerShape(12.dp)
+            )
+            .padding(horizontal = 12.dp)
+    ) {
+        NavigationNeedle(
+            bearingDeg = bearingDeg ?: 0.0,
+            color = if (configured) accent else placeholder,
+            dimmed = !configured,
+            modifier = Modifier.size(22.dp)
+        )
+        Text(
+            text = grid?.let { formatGridDisplay(it) } ?: "----",
+            fontSize = 15.sp,
+            fontWeight = FontWeight.Bold,
+            fontFamily = FontFamily.Monospace,
+            color = if (configured) accent else placeholder,
+            letterSpacing = 1.sp
+        )
+        Text(
+            text = distanceKm?.let { "${"%,.0f".format(it)} km" } ?: "-- km",
+            fontSize = 14.sp,
+            color = MaterialTheme.colorScheme.onSurface,
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 2.dp)
+        )
+    }
+}
+
+/**
+ * Map-style navigation needle: slim triangular pointer whose tip points at
+ * [bearingDeg] (0 = north/up, clockwise positive).
+ */
+@Composable
+private fun NavigationNeedle(
+    bearingDeg: Double,
+    color: Color,
+    dimmed: Boolean,
+    modifier: Modifier = Modifier
+) {
+    Canvas(modifier = modifier) {
+        val cx = size.width / 2f
+        val cy = size.height / 2f
+        val r = size.minDimension / 2f
+        if (dimmed) {
+            drawCircle(color = color, radius = r * 0.92f, style = Stroke(width = 1.5f))
+        }
+        rotate(degrees = bearingDeg.toFloat(), pivot = Offset(cx, cy)) {
+            val path = Path().apply {
+                moveTo(cx, cy - r * 0.9f)          // tip (north before rotation)
+                lineTo(cx - r * 0.42f, cy + r * 0.55f)
+                lineTo(cx, cy + r * 0.28f)
+                lineTo(cx + r * 0.42f, cy + r * 0.55f)
+                close()
+            }
+            drawPath(path, color = color)
+        }
+    }
+}
+
+/** Great-circle distance in km between two positions. */
+fun greatCircleDistanceKm(lat1: Double, lon1: Double, lat2: Double, lon2: Double): Double {
+    val rad = Math.PI / 180.0
+    val dLat = (lat2 - lat1) * rad
+    val dLon = (lon2 - lon1) * rad
+    val a = sin(dLat / 2) * sin(dLat / 2) +
+        cos(lat1 * rad) * cos(lat2 * rad) * sin(dLon / 2) * sin(dLon / 2)
+    return 6371.0 * 2 * kotlin.math.atan2(kotlin.math.sqrt(a), kotlin.math.sqrt(1 - a))
+}
+
+/** Initial great-circle bearing in degrees (0 = north, clockwise). */
+fun greatCircleBearingDeg(lat1: Double, lon1: Double, lat2: Double, lon2: Double): Double {
+    val rad = Math.PI / 180.0
+    val dLon = (lon2 - lon1) * rad
+    val y = sin(dLon) * cos(lat2 * rad)
+    val x = cos(lat1 * rad) * sin(lat2 * rad) -
+        sin(lat1 * rad) * cos(lat2 * rad) * cos(dLon)
+    return (Math.atan2(y, x) / rad + 360.0) % 360.0
+}

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

@@ -118,6 +118,10 @@
     <string name="map_period">周期：% .0f min</string>
     <string name="map_velocity">速度：%.2f km/s</string>
     <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_first">首通</string>
+    <string name="grid_qso_no_sat">卫星未知</string>
     <string name="map_visible">日照中</string>
 
     <!-- Settings screen -->
@@ -151,8 +155,8 @@
     <string name="prefs_lotw_title">LoTW 已确认网格</string>
     <string name="prefs_lotw_callsign">LoTW 呼号</string>
     <string name="prefs_lotw_password">LoTW 密码</string>
-    <string name="prefs_lotw_hint">直接从 ARRL LoTW 拉取已确认 QSO 的网格并与 Wavelog 网格合并（当前 %1$d 个）。密码仅保存在手机本地。填好直接点同步，会自动保存并拉取。</string>
-    <string name="prefs_lotw_sync">立即同步</string>
+    <string name="prefs_lotw_hint">直接从 ARRL LoTW 拉取该呼号已确认 QSO 的网格并覆盖本地已存集合（当前 %1$d 个）。密码仅保存在手机本地。点"同步"会自动保存凭据并拉取。</string>
+    <string name="prefs_lotw_sync">同步</string>
     <string name="prefs_lotw_syncing">同步中…</string>
     <string name="prefs_lotw_configured">已从 LoTW 同步 — 共 %1$d 个网格</string>
     <string name="prefs_lotw_not_configured">未配置 — 直接登录 ARRL LoTW 拉取已确认 QSO 的网格，无需自建服务器</string>

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

@@ -143,6 +143,10 @@
     <string name="map_period">Period: %.0f min</string>
     <string name="map_velocity">Velocity: %.2f km/s</string>
     <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_first">First</string>
+    <string name="grid_qso_no_sat">satellite unknown</string>
     <string name="map_visible">Visible</string>
 
     <!-- Settings screen -->
@@ -186,8 +190,8 @@
     <string name="prefs_lotw_title">LoTW confirmed grids</string>
     <string name="prefs_lotw_callsign">LoTW callsign</string>
     <string name="prefs_lotw_password">LoTW password</string>
-    <string name="prefs_lotw_hint">Fetch confirmed-QSO grids directly from ARRL LoTW and merge them with Wavelog grids (currently %1$d). The password is stored on this device only. Just tap Sync — credentials are saved automatically.</string>
-    <string name="prefs_lotw_sync">Sync now</string>
+    <string name="prefs_lotw_hint">Fetch confirmed-QSO grids directly from ARRL LoTW for this callsign and replace the stored set (currently %1$d). The password is stored on this device only. Tapping Sync saves the credentials and fetches in one step.</string>
+    <string name="prefs_lotw_sync">Sync</string>
     <string name="prefs_lotw_syncing">Syncing…</string>
     <string name="prefs_lotw_configured">Synced from LoTW — %1$d grids total</string>
     <string name="prefs_lotw_not_configured">Not configured — pull confirmed grids directly from ARRL LoTW, no self-hosted server needed</string>

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

@@ -56,6 +56,16 @@ 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
+        style = Paint.Style.STROKE
+        color = Color.argb(255, 90, 200, 255)
+    }
+    private val selectedLinePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        strokeWidth = 4.5f
+        style = Paint.Style.STROKE
+        color = Color.argb(255, 76, 217, 100)
+    }
 
     /** Worked gridsquares (4-char, uppercase) to highlight, e.g. {"OL62", "PM95"}. */
     var workedGrids: Set<String> = emptySet()
@@ -63,10 +73,17 @@ class MaidenheadGridOverlay : Overlay() {
     /** The station's own 4-char gridsquare, drawn with a distinct outline. */
     var ownGrid: String? = null
 
+    /** The currently tapped worked grid (4-char) highlighted with a distinct outline, or null. */
+    var selectedGrid: String? = null
+
+    /** Viewport width, refreshed each draw; used by projectionToX bounds. */
+    private var canvasWidthPx = 1080f
+
     override fun draw(canvas: Canvas, mapView: MapView, shadow: Boolean) {
         if (shadow || !isEnabled) return
         val projection = mapView.projection
         val zoom = mapView.zoomLevelDouble
+        canvasWidthPx = canvas.width.toFloat()
         val cellLat = if (zoom >= GRID_ZOOM_SUB) SUB_SQUARE_LAT else FIELD_LAT
         val cellLon = if (zoom >= GRID_ZOOM_SUB) SUB_SQUARE_LON else FIELD_LON
 
@@ -75,8 +92,19 @@ class MaidenheadGridOverlay : Overlay() {
         val south = projection.fromPixels(canvas.width, canvas.height)
         val topLat = max(north.latitude, south.latitude).coerceIn(-90.0, 90.0)
         val bottomLat = min(north.latitude, south.latitude).coerceIn(-90.0, 90.0)
-        val leftLon = min(north.longitude, south.longitude)
-        val rightLon = max(north.longitude, south.longitude)
+        // Longitude: osmdroid normalizes to [-180, 180), so when the view
+        // straddles the antimeridian (e.g. left edge 170°E, right edge 170°W)
+        // the raw min/max swap sides and the bounding box spans the wrong way
+        // (center on the Pacific → grid painted 180° off-screen). Unwrap by
+        // shifting one edge by +360° so left < right again.
+        var lonA = north.longitude
+        var lonB = south.longitude
+        if (lonA > lonB) {
+            val t = lonA; lonA = lonB; lonB = t
+        }
+        if (lonB - lonA > 180.0) lonA += 360.0
+        val leftLon = lonA
+        val rightLon = lonB
 
         val firstRow = floor(bottomLat / cellLat).toInt()
         val lastRow = ceil(topLat / cellLat).toInt()
@@ -85,23 +113,60 @@ class MaidenheadGridOverlay : Overlay() {
         val firstCol = floor(leftLon / cellLon).toInt()
         val lastCol = ceil(rightLon / cellLon).toInt()
         val centerLon = (leftLon + rightLon) / 2.0
+        // World width in screen pixels for the current zoom (256 px per tile,
+        // 2^zoom tiles across the whole 360° world). Used by the custom
+        // Mercator-X computation in projectionToX.
+        val worldWidthPx = 256.0 * Math.pow(2.0, zoom)
+        // At low zoom the world is narrower than the viewport and osmdroid shows
+        // repeating copies on both sides. The visible bounding box spans more
+        // than 360° of longitude there; extend the column range by whole world
+        // turns so meridians, fills and labels tile across the repeats too.
+        val worldTurns = ceil(((rightLon - leftLon) / 360.0) - 1e-9).toInt().coerceAtLeast(0)
+        val colRepeats = if (worldTurns > 0) worldTurns else 0
 
-        // Worked-grid highlight fills (only meaningful at sub-square zoom)
-        if (workedGrids.isNotEmpty() && 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)
-                val yBottom = projectionToY(projection, lat)
-                if (yTop == null || yBottom == null) continue
-                for (col in firstCol..lastCol) {
-                    val lon = col * cellLon
-                    val xLeft = projectionToX(projection, lon, centerLon) ?: continue
-                    val xRight = projectionToX(projection, lon + cellLon, centerLon) ?: continue
-                    if (xRight < 0f || xLeft > canvas.width) continue
-                    if (cellLabel(lat, lon, zoom) in workedGrids) {
+        // 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).
+        val selectedCell = selectedGrid?.takeIf { zoom >= GRID_ZOOM_SUB }
+
+        // Worked-grid highlight fills.
+        //  - Sub-square zoom: fill each worked 4-char cell directly.
+        //  - Field zoom (two-char labels): do NOT fill whole fields; instead fill
+        //    the individual 2°x1° squares that were worked, without drawing the
+        //    square grid lines — so you see green patches inside the field.
+        if (workedGrids.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)
+                    val yBottom = projectionToY(projection, lat)
+                    if (yTop == null || yBottom == null) continue
+                    for (turn in -colRepeats..colRepeats) for (col in firstCol..lastCol) {
+                        val lon = col * cellLon
+                        val xLeft = projectionToX(projection, lon, centerLon, worldWidthPx) ?: continue
+                        val xRight = projectionToX(projection, lon + cellLon, centerLon, worldWidthPx) ?: continue
+                        if (xRight < 0f || xLeft > canvas.width) continue
+                        if (cellLabel(lat, lon, zoom) in workedGrids) {
+                            canvas.drawRect(xLeft, yTop, xRight, yBottom, workedPaint)
+                        }
+                    }
+                }
+            } else {
+                for (grid in workedGrids) {
+                    val cell = gridCellBounds(grid) ?: continue
+                    for (turn in -colRepeats..colRepeats) {
+                        // Shift the cell by whole world turns to cover repeats.
+                        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 xLeft = projectionToX(projection, cell.lonLeft + dLon, centerLon, worldWidthPx) ?: continue
+                        val xRight = projectionToX(projection, cell.lonRight + dLon, centerLon, worldWidthPx) ?: continue
+                        if (xRight < 0f || xLeft > canvas.width) continue
+                        if (yBottom < 0f || yTop > canvas.height) continue
                         canvas.drawRect(xLeft, yTop, xRight, yBottom, workedPaint)
                     }
                 }
@@ -109,9 +174,9 @@ class MaidenheadGridOverlay : Overlay() {
         }
 
         // Vertical lines (meridians)
-        for (col in firstCol..lastCol) {
+        for (turn in -colRepeats..colRepeats) for (col in firstCol..lastCol) {
             val lon = col * cellLon
-            val x = projectionToX(projection, lon, centerLon)
+            val x = projectionToX(projection, lon, centerLon, worldWidthPx)
             if (x == null) continue
             canvas.drawLine(x, 0f, x, canvas.height.toFloat(), linePaint)
         }
@@ -124,13 +189,35 @@ class MaidenheadGridOverlay : Overlay() {
             canvas.drawLine(0f, y, canvas.width.toFloat(), y, linePaint)
         }
 
-        // Labels: centered in each cell, only when the cell is large enough on
-        // screen to hold a label (avoid clutter at low zoom)
-        val showLabels = when {
-            zoom >= GRID_ZOOM_SUB -> true
-            zoom >= FIELD_ZOOM_LABELS -> true
-            else -> false
+        // 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)
+                }
+            }
         }
+
+        // Labels: centered in each cell, only when the cell is large enough on
+        // screen to hold a label (avoid clutter at low zoom).
+        // Field (2-char) labels show at every zoom, subject only to the pixel-
+        // size check below; sub-square (4-char) labels only from LABEL_ZOOM_SUB
+        // (one level above the grid lines, so zoom 6 shows lines but no names).
+        val showLabels = zoom >= LABEL_ZOOM_SUB || cellLat == FIELD_LAT
         if (!showLabels) return
         // Estimate on-screen cell height to avoid clutter at low zoom:
         // project two points 1° apart in latitude and measure the pixel distance.
@@ -152,10 +239,10 @@ class MaidenheadGridOverlay : Overlay() {
             val yBottom = projectionToY(projection, lat) ?: continue
             val yCenter = (yTop + yBottom) / 2f - textHalfHeight
             if (yBottom < 0f || yTop > canvas.height) continue
-            for (col in firstCol..lastCol) {
+            for (turn in -colRepeats..colRepeats) for (col in firstCol..lastCol) {
                 val lon = col * cellLon
-                val xLeft = projectionToX(projection, lon, centerLon) ?: continue
-                val xRight = projectionToX(projection, lon + cellLon, centerLon) ?: continue
+                val xLeft = projectionToX(projection, lon, centerLon, worldWidthPx) ?: continue
+                val xRight = projectionToX(projection, lon + cellLon, centerLon, worldWidthPx) ?: continue
                 if (xRight < 0f || xLeft > canvas.width) continue
                 val label = cellLabel(lat, lon, zoom)
                 canvas.drawText(label, (xLeft + xRight) / 2f, yCenter, labelPaint)
@@ -164,18 +251,18 @@ class MaidenheadGridOverlay : Overlay() {
     }
 
     /** X pixel for a longitude (meridians are vertical in Web Mercator). */
-    private fun projectionToX(projection: Projection, lon: Double, centerLon: Double): Float? {
-        // osmdroid clips Mercator X to [0, mapSize], which destroys the projection of
-        // longitudes outside the [0, 360) window of the current view (visible at low
-        // zoom where the whole world is narrower than the viewport). Normalizing the
-        // longitude to the equivalent value closest to the view center keeps every
-        // meridian's X near the center, safely inside the clip window.
-        var normalized = lon
-        while (normalized < centerLon - 180.0) normalized += 360.0
-        while (normalized > centerLon + 180.0) normalized -= 360.0
-        val geo = org.osmdroid.util.GeoPoint(0.0, normalized)
+    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
+        // logic (getCloserPixel) mis-projects longitudes far from the view
+        // center, which makes meridians vanish while panning. Mercator X is
+        // linear in longitude, so compute it directly:
+        //   x = screenCenterX + (lon - centerLon) / 360 * worldWidthPx
+        var delta = lon - centerLon
+        while (delta > 180.0) delta -= 360.0
+        while (delta < -180.0) delta += 360.0
+        val geo = org.osmdroid.util.GeoPoint(0.0, centerLon)
         val p = projection.toPixels(geo, null)
-        return if (p.x in -MAX_OVERSHOOT_PX..MAX_OVERSHOOT_PX + 4096) p.x.toFloat() else null
+        return (p.x + delta / 360.0 * worldWidthPx).toFloat()
     }
 
     /** Y pixel for a latitude, or null when outside the viewport. */
@@ -200,6 +287,30 @@ class MaidenheadGridOverlay : Overlay() {
         return "$field$squareLon$squareLat"
     }
 
+    /**
+     * Geographic bounds of a 4-char Maidenhead square (e.g. "OL62"):
+     * 2° wide in longitude, 1° tall in latitude.
+     */
+    private fun gridCellBounds(grid: String): CellBounds? {
+        val g = grid.trim().uppercase()
+        if (g.length < 4) return null
+        val fieldLon = g[0] - 'A'
+        val fieldLat = g[1] - 'A'
+        val sqLon = g[2] - '0'
+        val sqLat = g[3] - '0'
+        if (fieldLon !in 0..17 || fieldLat !in 0..17 || sqLon !in 0..9 || sqLat !in 0..9) return null
+        val lonLeft = -180.0 + fieldLon * FIELD_LON + sqLon * SUB_SQUARE_LON
+        val latBottom = -90.0 + fieldLat * FIELD_LAT + sqLat * SUB_SQUARE_LAT
+        return CellBounds(lonLeft, lonLeft + SUB_SQUARE_LON, latBottom, latBottom + SUB_SQUARE_LAT)
+    }
+
+    private data class CellBounds(
+        val lonLeft: Double,
+        val lonRight: Double,
+        val latBottom: Double,
+        val latTop: Double
+    )
+
     private fun normalizeLon(lon: Double): Double {
         var l = lon % 360.0
         if (l >= 180.0) l -= 360.0
@@ -207,13 +318,19 @@ class MaidenheadGridOverlay : Overlay() {
         return l
     }
 
-    private companion object {
+    internal companion object {
         const val FIELD_LAT = 10.0
         const val FIELD_LON = 20.0
         const val SUB_SQUARE_LAT = 1.0
         const val SUB_SQUARE_LON = 2.0
-        const val GRID_ZOOM_SUB = 5.0
-        const val FIELD_ZOOM_LABELS = 3.0
+        // 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
+        // on-screen size of each square.
+        const val GRID_ZOOM_SUB = 6.0
+        // Zoom at which the 4-char sub-square names appear (one level above the
+        // grid lines: zoom 6 = lines only, zoom 7+ = lines + names).
+        const val LABEL_ZOOM_SUB = 7.0
         const val MIN_LABEL_CELL_PX = 48f
         const val MAX_OVERSHOOT_PX = 64
     }

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

@@ -25,14 +25,18 @@ import android.graphics.Paint
 import android.graphics.Rect
 import android.graphics.drawable.Drawable
 import androidx.collection.LruCache
+import androidx.compose.foundation.clickable
 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.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.ElevatedCard
@@ -138,7 +142,41 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
     val timeString = uiState.mapData?.aosTime ?: "00:00:00"
     val isTimeAos = uiState.mapData?.isTimeAos ?: true
 
+    // 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) }
+    // 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 {
+            override fun singleTapConfirmedHelper(p: GeoPoint?): Boolean {
+                if (!isGridMode || p == null) return false
+                val zoom = mapView.zoomLevelDouble
+                if (zoom < MaidenheadGridOverlay.LABEL_ZOOM_SUB) return false
+                val grid = gridOfPoint(p.latitude, p.longitude) ?: return false
+                if (grid !in workedGrids) return false
+                selectedGrid = grid
+                return true
+            }
+
+            override fun longPressHelper(p: GeoPoint?): Boolean = false
+        }
+        val eventsOverlay = org.osmdroid.views.overlay.MapEventsOverlay(receiver)
+        mapView.overlays.add(eventsOverlay)
+        onDispose { mapView.overlays.remove(eventsOverlay) }
+    }
+    // Keep the overlay's selected highlight in sync with the dialog.
+    LaunchedEffect(selectedGrid) {
+        (mapView.overlays.getOrNull(OVERLAY_GRID) as? MaidenheadGridOverlay)?.selectedGrid = selectedGrid
+        mapView.invalidate()
+    }
+
     LaunchedEffect(uiState.track) {
+        // In grid mode the map is centered on the local grid square; following
+        // the satellite subpoint here would override that centering on every
+        // track update, so skip the tracking animation entirely.
+        if (uiState.isGridMode) return@LaunchedEffect
         val firstPos = uiState.track?.firstOrNull()?.firstOrNull() ?: return@LaunchedEffect
         mapView.controller.animateTo(GeoPoint(firstPos.latitude, firstPos.longitude))
     }
@@ -161,15 +199,22 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
         }
         ElevatedCard(modifier = Modifier.weight(1f)) {
             Box(contentAlignment = Alignment.BottomCenter) {
-                // Track grid-mode transitions so the map only re-centers when the
-                // mode is switched ON, not on every recomposition.
-                var prevGridMode by remember { mutableStateOf(uiState.isGridMode) }
+                // Track grid-mode transitions; initial value false so that entering
+                // the map page with grid mode already ON also centers the map.
+                var prevGridMode by remember { mutableStateOf(false) }
                 AndroidView({ mapView }) { view ->
+                    // Center on the station grid whenever entering grid mode.
+                    // Only mark the transition as consumed once a real position
+                    // was available; otherwise a first frame with a null
+                    // stationPosition would swallow the centering forever.
+                    val shouldCenter = uiState.isGridMode && !prevGridMode
                     setGridMode(
                         uiState.isGridMode, uiState.workedGrids, view,
-                        if (uiState.isGridMode && !prevGridMode) uiState.stationPosition else null
+                        if (shouldCenter) uiState.stationPosition else null
                     )
-                    prevGridMode = uiState.isGridMode
+                    if (!shouldCenter || uiState.stationPosition != null) {
+                        prevGridMode = uiState.isGridMode
+                    }
                     if (!uiState.isGridMode) {
                         uiState.stationPosition?.let { setStationPosition(it, view) }
                         uiState.track?.let { setSatelliteTrack(it, view) }
@@ -189,8 +234,155 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
             }
         }
     }
+    // Centered dialog listing the tapped worked grid's confirmed satellite QSOs.
+    // Dismissed by tapping outside (no explicit close button).
+    selectedGrid?.let { grid ->
+        WorkedGridQsoDialog(
+            grid = grid,
+            qsos = uiState.workedGridQsos[grid].orEmpty().sortedBy { it.epochMs },
+            isUtc = uiState.isUtc,
+            onDismiss = { selectedGrid = null }
+        )
+    }
 }
 
+// region Worked-grid QSO dialog
+
+@Composable
+private fun WorkedGridQsoDialog(
+    grid: String,
+    qsos: List<com.rtbishop.look4sat.core.domain.model.GridQso>,
+    isUtc: Boolean,
+    onDismiss: () -> Unit
+) {
+    androidx.compose.ui.window.Dialog(onDismissRequest = onDismiss) {
+        // Centered card, ~85% width, internal scroll for long lists.
+        Card(
+            colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainerLow),
+            modifier = Modifier.fillMaxWidth(0.88f)
+        ) {
+            Column {
+                // Header: grid + counts
+                Column(Modifier.padding(horizontal = 16.dp, vertical = 10.dp)) {
+                    Text(
+                        text = grid,
+                        style = MaterialTheme.typography.titleLarge,
+                        color = MaterialTheme.colorScheme.primary,
+                        fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+                    )
+                    val distinctCalls = qsos.map { it.call }.distinct().size
+                    Text(
+                        text = stringResource(R.string.grid_qso_calls_count, distinctCalls, qsos.size),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+                androidx.compose.material3.HorizontalDivider()
+                if (qsos.isEmpty()) {
+                    Text(
+                        text = stringResource(R.string.grid_qso_no_sat),
+                        style = MaterialTheme.typography.bodySmall,
+                        modifier = Modifier.padding(16.dp)
+                    )
+                } else {
+                    // Group by callsign preserving first-contact order (list is
+                    // already sorted oldest-first); expandable rows.
+                    val grouped = remember(qsos) {
+                        qsos.groupBy { it.call }.entries.sortedBy { it.value.first().epochMs }
+                    }
+                    Column(
+                        Modifier
+                            .heightIn(max = 380.dp)
+                            .verticalScroll(rememberScrollState())
+                    ) {
+                        grouped.forEach { (call, callQsos) ->
+                            WorkedGridCallRow(call, callQsos = callQsos, isUtc = isUtc)
+                            androidx.compose.material3.HorizontalDivider(color = MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.3f))
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun WorkedGridCallRow(
+    call: String,
+    callQsos: List<com.rtbishop.look4sat.core.domain.model.GridQso>,
+    isUtc: Boolean,
+) {
+    var expanded by remember { mutableStateOf(false) }
+    val first = callQsos.first()
+    Column(Modifier.fillMaxWidth().padding(horizontal = 16.dp, vertical = 8.dp)) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable { expanded = !expanded }
+        ) {
+            Text(
+                text = call,
+                style = MaterialTheme.typography.titleMedium,
+                fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
+                color = MaterialTheme.colorScheme.tertiary,
+                modifier = Modifier.weight(1f)
+            )
+            Text(
+                text = formatDate(first.epochMs, isUtc),
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+            Text(
+                text = if (expanded) " ▴" else " ▾",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.primary
+            )
+        }
+        // First-QSO summary line, always visible.
+        Text(
+            text = stringResource(R.string.grid_qso_first) + " · " + qsoSummary(first, isUtc),
+            style = MaterialTheme.typography.bodySmall,
+            modifier = Modifier.padding(top = 3.dp)
+        )
+        // Subsequent QSOs in this grid, revealed on expand.
+        if (expanded && callQsos.size > 1) {
+            callQsos.drop(1).forEachIndexed { index, qso ->
+                val ordinal = "${index + 2}"
+                Text(
+                    text = "$ordinal " + qsoSummary(qso, isUtc),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 3.dp)
+                )
+            }
+        }
+    }
+}
+
+private fun qsoSummary(qso: com.rtbishop.look4sat.core.domain.model.GridQso, isUtc: Boolean): String {
+    val sat = qso.satName.ifBlank { "?" }
+    val mode = qso.mode.ifBlank { "?" }
+    val band = qso.bandLabel
+    val time = formatTime(qso.epochMs, isUtc)
+    return listOf(sat, mode, band, time).filter { it.isNotBlank() }.joinToString(" · ")
+}
+
+private fun formatDate(epochMs: Long, isUtc: Boolean): String {
+    if (epochMs <= 0L) return "--"
+    val zone = if (isUtc) java.time.ZoneOffset.UTC else java.time.ZoneId.systemDefault()
+    return java.time.Instant.ofEpochMilli(epochMs).atZone(zone)
+        .format(java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd"))
+}
+
+private fun formatTime(epochMs: Long, isUtc: Boolean): String {
+    if (epochMs <= 0L) return "--:--"
+    val zone = if (isUtc) java.time.ZoneOffset.UTC else java.time.ZoneId.systemDefault()
+    return java.time.Instant.ofEpochMilli(epochMs).atZone(zone)
+        .format(java.time.format.DateTimeFormatter.ofPattern(if (isUtc) "HH:mm'Z'" else "HH:mm"))
+}
+// endregion
+
 // region Map data composables
 @Composable
 private fun MapDataCard(data: MapData) {
@@ -289,10 +481,12 @@ private fun setGridMode(
         if (gridOverlay is MaidenheadGridOverlay) {
             gridOverlay.isEnabled = gridMode
             gridOverlay.workedGrids = workedGrids
+            gridOverlay.ownGrid = ownGridOf(stationPosition)
         } else {
             mapView.overlays[OVERLAY_GRID] = MaidenheadGridOverlay().apply {
                 isEnabled = gridMode
                 this.workedGrids = workedGrids
+                this.ownGrid = ownGridOf(stationPosition)
             }
         }
         // Satellite-related layers are hidden in grid mode; the grid overlay
@@ -301,7 +495,10 @@ private fun setGridMode(
             mapView.overlays.getOrNull(index)?.isEnabled = !gridMode
         }
         // Entering grid mode: center on the station's current grid square,
-        // keeping the current zoom level unchanged.
+        // keeping the current zoom level unchanged. post{} is essential: on the
+        // 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) {
             val pos = stationPosition ?: return
             val lat = pos.latitude
@@ -310,13 +507,36 @@ private fun setGridMode(
             val fieldLon = ((lon + 180.0) / 20.0).toInt().coerceIn(0, 17)
             val centerLat = fieldLat * 10.0 + 5.0
             val centerLon = fieldLon * 20.0 + 10.0
-            mapView.controller.setCenter(GeoPoint(centerLat, centerLon))
+            mapView.post { mapView.controller.setCenter(GeoPoint(centerLat, centerLon)) }
         }
     } catch (e: Exception) {
         println(e)
     }
 }
 
+/** The station's 4-char Maidenhead gridsquare, e.g. "OL62", or null without a position. */
+private fun ownGridOf(stationPosition: GeoPos?): String? {
+    val pos = stationPosition ?: return null
+    val lat = pos.latitude
+    val lon = pos.longitude
+    val fieldLat = ((lat + 90.0) / 10.0).toInt().coerceIn(0, 17)
+    val fieldLon = ((lon + 180.0) / 20.0).toInt().coerceIn(0, 17)
+    val subLat = ((lat + 90.0) % 10.0).toInt()
+    val subLon = ((lon + 180.0) % 20.0 / 2.0).toInt()
+    return "${'A' + fieldLon}${'A' + fieldLat}$subLon$subLat"
+}
+
+/** The 4-char Maidenhead gridsquare containing the given point, or null outside the grid. */
+private fun gridOfPoint(latitude: Double, longitude: Double): String? {
+    if (latitude < -90.0 || latitude >= 90.0) return null
+    val lon = ((longitude + 180.0) % 360.0 + 360.0) % 360.0 - 180.0
+    val fieldLat = ((latitude + 90.0) / 10.0).toInt().coerceIn(0, 17)
+    val fieldLon = ((lon + 180.0) / 20.0).toInt().coerceIn(0, 17)
+    val subLat = ((latitude + 90.0) % 10.0).toInt()
+    val subLon = ((lon + 180.0) % 20.0 / 2.0).toInt()
+    return "${'A' + fieldLon}${'A' + fieldLat}$subLon$subLat"
+}
+
 private fun setStationPosition(stationPos: GeoPos, mapView: MapView) {
     try {
         val overlay = mapView.overlays[OVERLAY_STATION]

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

@@ -28,6 +28,7 @@ data class MapState(
     val isUtc: Boolean = false,
     val isGridMode: Boolean = false,
     val workedGrids: Set<String> = emptySet(),
+    val workedGridQsos: Map<String, List<com.rtbishop.look4sat.core.domain.model.GridQso>> = emptyMap(),
     val stationPosition: GeoPos? = null,
     val orbitalPass: OrbitalPass,
     val track: List<List<GeoPos>>? = null,

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

@@ -79,7 +79,12 @@ class MapViewModel(
         }
         viewModelScope.launch {
             settingsRepo.wavelogSettings.collectLatest { _ ->
-                _uiState.update { it.copy(workedGrids = settingsRepo.getWorkedGrids()) }
+                _uiState.update {
+                    it.copy(
+                        workedGrids = settingsRepo.getWorkedGrids(),
+                        workedGridQsos = settingsRepo.getWorkedGridQsos()
+                    )
+                }
             }
         }
         val (selectedCatNum, _) = satelliteRepo.selectedPass.value

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/MutualScreen.kt

@@ -63,6 +63,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.repository.MutualPassData
 import com.rtbishop.look4sat.core.domain.repository.TrackSampleData
+import com.rtbishop.look4sat.core.presentation.GridTargetChip
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.ScreenColumn
 import com.rtbishop.look4sat.core.presentation.TopBar
@@ -88,7 +89,8 @@ fun MutualScreen(
                     Text(
                         text = stringResource(R.string.mutual_title),
                         style = MaterialTheme.typography.titleMedium,
-                        fontWeight = FontWeight.Bold
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(start = 12.dp)
                     )
                 },
                 bottomInfo = {
@@ -98,7 +100,9 @@ fun MutualScreen(
                         color = MaterialTheme.colorScheme.onSurfaceVariant,
                         maxLines = 1,
                         overflow = TextOverflow.Ellipsis,
-                        modifier = Modifier.weight(1f)
+                        modifier = Modifier
+                            .weight(1f)
+                            .padding(start = 12.dp)
                     )
                 },
                 endAction = {
@@ -114,7 +118,29 @@ fun MutualScreen(
                                 strokeWidth = 2.dp
                             )
                         }
-                        MutualStatusChip(state)
+                        // Target-grid chip: station B grid (station A defaults to
+                        // the user's own position), bearing/distance from A to B.
+                        val gridB = state.stationBGrid.trim().uppercase()
+                        val posA = com.rtbishop.look4sat.core.domain.utility.qthToPosition(state.stationAGrid)
+                            ?: state.stationALat.toDoubleOrNull()?.let { lat ->
+                                state.stationALon.toDoubleOrNull()?.let { lon ->
+                                    com.rtbishop.look4sat.core.domain.predict.GeoPos(lat, lon)
+                                }
+                            }
+                        val posB = com.rtbishop.look4sat.core.domain.utility.qthToPosition(gridB)
+                        if (posA != null && posB != null) {
+                            GridTargetChip(
+                                grid = gridB,
+                                distanceKm = com.rtbishop.look4sat.core.presentation.greatCircleDistanceKm(
+                                    posA.latitude, posA.longitude, posB.latitude, posB.longitude
+                                ),
+                                bearingDeg = com.rtbishop.look4sat.core.presentation.greatCircleBearingDeg(
+                                    posA.latitude, posA.longitude, posB.latitude, posB.longitude
+                                )
+                            )
+                        } else {
+                            GridTargetChip(grid = null, distanceKm = null, bearingDeg = null)
+                        }
                     }
                 }
             )

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

@@ -238,10 +238,13 @@ fun LoTWDialog(
     SharedDialog(
         title = stringResource(R.string.prefs_lotw_title),
         onCancel = dismiss,
+        // The confirm button IS the sync action: saving credentials and
+        // fetching confirmed grids happen in one step.
         onAccept = {
-            onSave(com.rtbishop.look4sat.core.domain.model.LoTWSettings(call.value, pass.value))
-            dismiss()
-        }
+            onSync(com.rtbishop.look4sat.core.domain.model.LoTWSettings(call.value, pass.value))
+        },
+        acceptText = stringResource(if (isSyncing) R.string.prefs_lotw_syncing else R.string.prefs_lotw_sync),
+        acceptEnabled = !isSyncing
     ) {
         OutlinedTextField(
             value = call.value,
@@ -273,20 +276,6 @@ fun LoTWDialog(
                 modifier = Modifier.padding(horizontal = LocalSpacing.current.large)
             )
         }
-        // Sync uses the values typed in the fields directly — saving and syncing
-        // happen in one step, no need to close and reopen the dialog.
-        Row(
-            horizontalArrangement = Arrangement.End,
-            modifier = Modifier.fillMaxWidth().padding(horizontal = LocalSpacing.current.large)
-        ) {
-            TextButton(
-                onClick = { onSync(com.rtbishop.look4sat.core.domain.model.LoTWSettings(call.value, pass.value)) },
-                enabled = !isSyncing
-            ) {
-                Text(text = if (isSyncing) stringResource(R.string.prefs_lotw_syncing)
-                else stringResource(R.string.prefs_lotw_sync))
-            }
-        }
         Spacer(modifier = Modifier.height(0.dp))
     }
 }

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

@@ -203,18 +203,6 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
             onSave = { onAction(SettingsAction.UpdateRadioControl(it)) }
         )
     }
-    if (dialogs.wavelog) {
-        WavelogDialog(
-            initialSettings = uiState.wavelogSettings,
-            workedGridsCount = uiState.workedGridsCount,
-            isSyncing = uiState.wavelogSyncing,
-            message = uiState.wavelogMessage,
-            dismiss = { dialogs.wavelog = false },
-            onSave = { onAction(SettingsAction.UpdateWavelog(it)) },
-            onSync = { onAction(SettingsAction.SyncWorkedGrids(it)) }
-        )
-    }
-
     if (dialogs.lotw) {
         LoTWDialog(
             initialSettings = uiState.lotwSettings,
@@ -330,13 +318,6 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                     onRadioControlClick = { dialogs.radioControl = true }
                 )
             }
-            item {
-                WavelogCard(
-                    settings = uiState.wavelogSettings,
-                    workedGridsCount = uiState.workedGridsCount,
-                    showWavelogDialog = { dialogs.wavelog = true }
-                )
-            }
             item {
                 LoTWCard(
                     settings = uiState.lotwSettings,
@@ -581,44 +562,6 @@ private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: (Boole
     }
 }
 
-@Preview(showBackground = true)
-@Composable
-private fun WavelogCardPreview() = MainTheme {
-    WavelogCard(settings = WavelogSettings("http://192.168.1.10", "wl2_demo"), workedGridsCount = 42) {}
-}
-
-@Composable
-private fun WavelogCard(
-    settings: WavelogSettings,
-    workedGridsCount: Int,
-    showWavelogDialog: () -> Unit
-) {
-    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
-        Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
-            Text(
-                text = stringResource(id = R.string.prefs_wavelog_title),
-                color = MaterialTheme.colorScheme.primary
-            )
-            Spacer(modifier = Modifier.height(2.dp))
-            Text(
-                text = if (settings.isConfigured) {
-                    stringResource(R.string.prefs_wavelog_configured, workedGridsCount)
-                } else {
-                    stringResource(R.string.prefs_wavelog_not_configured)
-                },
-                style = MaterialTheme.typography.bodySmall,
-                maxLines = 2
-            )
-            Spacer(modifier = Modifier.height(4.dp))
-            CardButton(
-                onClick = showWavelogDialog,
-                text = stringResource(id = R.string.prefs_wavelog_configure),
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
-    }
-}
-
 @Composable
 private fun LoTWCard(
     settings: com.rtbishop.look4sat.core.domain.model.LoTWSettings,

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

@@ -201,15 +201,17 @@ class SettingsViewModel(
         settingsRepo.updateLoTWSettings(settings)
         _uiState.update { it.copy(lotwSyncing = true, lotwMessage = null) }
         viewModelScope.launch {
-            val lotwGrids = lotwRepo.fetchConfirmedGrids(settings.callsign, settings.password)
+            val lotwResult = lotwRepo.fetchConfirmedGridQsos(settings.callsign, settings.password)
             _uiState.update { state ->
-                if (lotwGrids == null) {
+                if (lotwResult == null) {
                     state.copy(lotwSyncing = false, lotwMessage = "LoTW sync failed — check callsign/password/network")
                 } else {
-                    // Merge with Wavelog grids: union of both sources, all confirmed/worked
-                    val merged = settingsRepo.getWorkedGrids() + lotwGrids
-                    settingsRepo.setWorkedGrids(merged)
-                    state.copy(lotwSyncing = false, workedGridsCount = merged.size, lotwMessage = null)
+                    // Wavelog entry removed: LoTW is now the only source, so the
+                    // synced set fully replaces the stored worked grids.
+                    val (grids, qsos) = lotwResult
+                    settingsRepo.setWorkedGrids(grids)
+                    settingsRepo.setWorkedGridQsos(qsos)
+                    state.copy(lotwSyncing = false, workedGridsCount = grids.size, lotwMessage = null)
                 }
             }
         }

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "455"
+appVersionCode = "459"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.6-ba7opf.9.3"
+appVersionName = "4.4.6-ba7opf.9.8"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry