test(mutual): 钉死 fixture 时间基准，消除时段性 flaky

fixture 用 2024-03-09 固定 ISS TLE + System.currentTimeMillis() 起点；SGP4 带阻力衰减 942 天后高度仅 ≈262km，12h 窗口内可能无广州过境 → 3 条依赖过境窗的用例时段性失败（Gradle 缓存 FROM-CACHE 会掩盖上一次的真跑）。

- TestOrbits.FIXTURE_BASE（2024-03-10T00:00Z，历元后约 18h）取代默认 System.currentTimeMillis()

- MutualViewModel 墙钟可注入：nowMillis: () -> Long = System::currentTimeMillis（第 4 个默认参数，生产行为逐位不变；工厂具名构造零改动）

- 断言里的 now 改用同一基准；prefill/scroll 测试不碰时间未动

修后：:feature:mutual 28/28，全量 ./gradlew test 451/451。

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

@@ -36,7 +36,7 @@ import java.util.Locale
 import java.util.zip.GZIPInputStream
 import javax.xml.parsers.DocumentBuilderFactory
 
-/** Bundled ARRL configuration 11.34 from https://lotw.arrl.org/lotw/config.tq6. */
+/** Bundled ARRL configuration 11.35 from https://lotw.arrl.org/lotw/config.tq6. */
 internal class LoTWConfig(input: InputStream) {
     private val root = input.use { source -> GZIPInputStream(source).use { gzip ->
         val xml = gzip.bufferedReader(Charsets.UTF_8).readText()

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

@@ -37,7 +37,12 @@ internal class LoTWSigner(private val config: LoTWConfig) {
         val call = record.theirCallsign.trim().uppercase(Locale.US)
         if (record.status != QsoStatus.COMPLETE || !call.matches(Regex("[A-Z0-9]+(/[A-Z0-9]+)*")) ||
             !call.any(Char::isLetter) || !call.any(Char::isDigit)) fail(LoTWProblem.INVALID_CONTACT, call)
-        if (!record.myCallsign.trim().equals(key.info.callsign, true)) fail(LoTWProblem.CALLSIGN_MISMATCH, call)
+        // Report the two callsigns the operator has to reconcile (record vs certificate). A generic
+        // sample — the opposite station's call — says nothing about which side is wrong, which is
+        // exactly what a "MY callsign does not match the certificate" message must tell.
+        if (!record.myCallsign.trim().equals(key.info.callsign, true)) {
+            fail(LoTWProblem.CALLSIGN_MISMATCH, "${record.myCallsign.trim()} ≠ ${key.info.callsign}")
+        }
         val date = utc(record.startUtcMillis, "yyyy-MM-dd")
         // A record dated after "now" gets its own message: it happens when the operator
         // logged against a pass that had not started yet (out-of-window flow), and "fix the

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

@@ -66,8 +66,17 @@ class SelectionRepo(
         }
     }
 
+    // Selected satellites are pinned to the top (matches upstream); ordering
+    // within each group stays name/catnum. Sits on the reactive chain, so
+    // ticking an entry re-sorts the visible list immediately.
     private val itemsWithQuery = currentQuery.flatMapLatest { query ->
-        itemsWithTypes.map { items -> filterByQuery(items, query) }
+        itemsWithTypes.map { items ->
+            filterByQuery(items, query).sortedWith(
+                compareByDescending<SatItem> { it.isSelected }
+                    .thenBy { it.name }
+                    .thenBy { it.catnum }
+            )
+        }
     }
 
     override fun getCurrentTypes() = currentTypes.value

core/data/src/test/java/com/rtbishop/look4sat/core/data/lotw/LoTWConfigTest.kt

@@ -87,6 +87,7 @@ class LoTWConfigTest {
         assertEquals("AO-91", config.resolveSatellite("FOX-1B"))
         assertEquals("IO-86", config.resolveSatellite("LAPAN-A2"))
         assertEquals("RS-44", config.resolveSatellite("DOSAAF-85"))
+        assertEquals("RS95S", config.resolveSatellite("QMR-KWT 2"))
         assertEquals("BO-102", config.resolveSatellite("CAS-7B"))
         assertEquals("SO-50", config.resolveSatellite("SO-50"))
     }

core/data/src/test/java/com/rtbishop/look4sat/core/data/lotw/LoTWUploadRepositoryPreviewTest.kt

@@ -22,6 +22,7 @@ import com.rtbishop.look4sat.core.domain.logbook.QsoStatus
 import com.rtbishop.look4sat.core.domain.repository.LoTWOperationException
 import com.rtbishop.look4sat.core.domain.repository.LoTWProblem
 import com.rtbishop.look4sat.core.domain.repository.LoTWStation
+import com.rtbishop.look4sat.core.domain.repository.LoTWUploadResult
 import java.io.File
 import kotlinx.coroutines.runBlocking
 import org.junit.Assert.assertEquals
@@ -120,6 +121,55 @@ class LoTWUploadRepositoryPreviewTest {
         }
     }
 
+    /** Nothing signable at all: the preview still comes back (count 0) with the conflicts listed,
+     *  so the UI can offer the rewrite / use-another-certificate actions instead of a dead end. */
+    @Test
+    fun `fully blocked batch still returns a preview with the conflicts`() {
+        runBlocking {
+            val storage = MemStorage()
+            val repo = LoTWUploadRepository(
+                storage,
+                { LoTWConfig(File("src/main/assets/lotw/config.tq6").inputStream()) },
+                now = { System.currentTimeMillis() }
+            )
+            repo.importCertificate(fixture("test_tqsl_empty.p12"), charArrayOf())
+            repo.saveStation(LoTWStation(grid = "OL62TI"))
+            val start = 1_787_000_000_000L
+            val preview = repo.prepare(
+                listOf(
+                    sampleRecord(start, "BH6RJD", "XX0YY"),
+                    sampleRecord(start + 60_000L, "BG7QBL", "XX0ZZ")
+                ),
+                resubmit = false
+            )
+            assertEquals(0, preview.count)
+            assertEquals(2, preview.unavailableSkipped)
+            assertEquals(listOf(start, start + 60_000L), preview.callsignConflicts)
+            assertEquals(2, preview.unavailableReasons[LoTWProblem.CALLSIGN_MISMATCH])
+            assertEquals(0, preview.missingCallsign)
+            // No payload was prepared: confirming this preview must fail as expired, not crash.
+            assertTrue(repo.upload(preview.id) is LoTWUploadResult.ExpiredPreview)
+        }
+    }
+
+    /** The mismatch reason names both callsigns (record vs certificate). The old detail showed the
+     *  opposite station's call, which told the operator nothing about which side to fix. */
+    @Test
+    fun `callsign mismatch detail names the record and the certificate callsign`() {
+        runBlocking {
+            val storage = MemStorage()
+            val repo = LoTWUploadRepository(
+                storage,
+                { LoTWConfig(File("src/main/assets/lotw/config.tq6").inputStream()) },
+                now = { System.currentTimeMillis() }
+            )
+            repo.importCertificate(fixture("test_tqsl_empty.p12"), charArrayOf())
+            repo.saveStation(LoTWStation(grid = "OL62TI"))
+            val audit = repo.audit(listOf(sampleRecord(1_787_000_000_000L, "BH6RJD", "XX0YY")))
+            assertEquals("XX0YY ≠ BA7OPF", audit.details[LoTWProblem.CALLSIGN_MISMATCH])
+        }
+    }
+
     private fun sampleRecord(start: Long, call: String, myCallsign: String) = QsoRecord(
         id = start,
         startUtcMillis = start,

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

@@ -284,6 +284,24 @@ class SelectionRepoSearchTest {
         assertEquals(sampleItems.map { it.catnum }.toSet(), results.map { it.catnum }.toSet())
     }
 
+    @Test
+    fun `selected satellites are shown first`() = runTest {
+        // Pinning ported from upstream: ticked satellites sort above the rest,
+        // each group keeping the name order.
+        val repo = createRepo(
+            items = listOf(
+                SatItem(catnum = 44444, name = "Zeta"),
+                SatItem(catnum = 25544, name = "Alpha"),
+                SatItem(catnum = 40967, name = "Beta")
+            )
+        )
+        val flow = repo.getEntriesFlow()
+        repo.setSelection(listOf(40967), true)
+        val results = flow.first()
+        assertEquals(listOf(40967, 25544, 44444), results.map { it.catnum })
+        assertEquals(listOf(true, false, false), results.map { it.isSelected })
+    }
+
     private fun createRepo(
         items: List<SatItem>,
         sstvIds: List<Int> = emptyList()

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

@@ -14,9 +14,15 @@ import java.util.Date
 import java.util.Locale
 import java.util.TimeZone
 
-/** Small ADI codec for the logbook's actual field set (ADIF 3.1.7). */
+/**
+ * Small ADI codec for the logbook's actual field set (ADIF 3.1.7).
+ *
+ * Grid directions follow ADIF: the un-prefixed fields (GRIDSQUARE, VUCC_GRIDS) belong to
+ * the OPPOSITE station, the MY_* fields (MY_GRIDSQUARE, MY_VUCC_GRIDS) to the operator.
+ */
 object AdifCodec {
     private val utc = TimeZone.getTimeZone("UTC")
+    private val gridPattern = Regex("[A-R]{2}[0-9]{2}([A-X]{2}([0-9]{2})?)?")
 
     fun encode(records: List<QsoRecord>, includeStationCallsign: Boolean = true): String = buildString {
         append(field("ADIF_VER", "3.1.7"))
@@ -36,7 +42,17 @@ object AdifCodec {
             appendOptional("MODE", record.mode)
             appendOptional("SUBMODE", record.submode)
             appendOptional("GRIDSQUARE", record.theirGrid)
+            // The OPPOSITE station's multi-grid set (2+ grids: a grid line or corner).
+            // A single grid is carried by GRIDSQUARE; one value inside the VUCC field
+            // makes Wavelog flag the record in its QSO view.
+            if (record.theirVuccGrids.size > 1) {
+                appendOptional("VUCC_GRIDS", record.theirVuccGrids.joinToString(","))
+            }
             appendOptional("MY_GRIDSQUARE", record.myGrid)
+            // The grid set this qso went out under (own operated grids, stamped at
+            // upload). ADIF's MY_VUCC_GRIDS is its home — not VUCC_GRIDS, which belongs
+            // to the opposite station and drives Wavelog's grid/distance/QRB display.
+            appendOptional("MY_VUCC_GRIDS", record.vuccGrids.joinToString(","))
             appendOptional("RST_SENT", record.sentReport)
             appendOptional("RST_RCVD", record.receivedReport)
             record.txFrequencyHz?.let { append(field("FREQ", hzToMhz(it))) }
@@ -49,7 +65,6 @@ object AdifCodec {
             if (record.lotwConfirmed) append(field("LOTW_QSL_RCVD", "Y"))
             if (record.lotwReceived) append(field("LOTW_QSL_SENT", "Y"))
             appendOptional("LOTW_QSLRDATE", record.lotwQslDate)
-            appendOptional("VUCC_GRIDS", record.vuccGrids.joinToString(","))
             record.dxcc?.let { append(field("DXCC", it.toString())) }
             appendOptional("COUNTRY", record.country)
             record.cqZone?.let { append(field("CQZ", it.toString())) }
@@ -80,7 +95,9 @@ object AdifCodec {
             theirCallsign = call,
             myCallsign = values["STATION_CALLSIGN"].orEmpty().uppercase(Locale.US),
             theirGrid = values["GRIDSQUARE"].orEmpty().uppercase(Locale.US),
+            theirVuccGrids = decodeGrids(values["VUCC_GRIDS"]),
             myGrid = values["MY_GRIDSQUARE"].orEmpty().uppercase(Locale.US),
+            vuccGrids = decodeGrids(values["MY_VUCC_GRIDS"]),
             sentReport = values["RST_SENT"].orEmpty(),
             receivedReport = values["RST_RCVD"].orEmpty(),
             txFrequencyHz = mhzToHz(values["FREQ"]),
@@ -100,8 +117,6 @@ object AdifCodec {
             lotwConfirmed = values["LOTW_QSL_RCVD"].equals("Y", true),
             lotwReceived = values["LOTW_QSL_SENT"].equals("Y", true),
             lotwQslDate = values["LOTW_QSLRDATE"].orEmpty(),
-            vuccGrids = values["VUCC_GRIDS"].orEmpty().split(',').map { it.trim().uppercase(Locale.US) }
-                .filter { it.matches(Regex("[A-R]{2}[0-9]{2}([A-X]{2}([0-9]{2})?)?")) }.distinct(),
             dxcc = values["DXCC"]?.toIntOrNull(),
             country = values["COUNTRY"].orEmpty(),
             cqZone = values["CQZ"]?.toIntOrNull()?.takeIf { it in 1..40 },
@@ -140,6 +155,12 @@ object AdifCodec {
         return records
     }
 
+    /** Splits an ADIF grid list on commas, keeping only valid 4/6/8-char locators. */
+    private fun decodeGrids(value: String?): List<String> = value.orEmpty().split(',')
+        .map { it.trim().uppercase(Locale.US) }
+        .filter { it.matches(gridPattern) }
+        .distinct()
+
     private fun StringBuilder.appendOptional(name: String, value: String) {
         if (value.isNotBlank()) append(field(name, value))
     }

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

@@ -34,6 +34,8 @@ import java.util.Locale
  *  - live SatNOGS 3LE names and Celestrak amateur names joined to the same NORAD id,
  *  - designator tokens of the config.tq6 satellite descriptions (e.g. CAS-7B -> BO-102),
  *  - the ISS family, which SatNOGS does not list under its ARRL name "ARISS".
+ * Added 2026-10-08: config.tq6 v11.35 lists QMR-KWT 2 as "RS95S"; SatNOGS DB carries it as
+ * "QMR-KWT 2" (alias "RS95S") and other sources spell it "RS-95S", hence the identity entry.
  * Placeholder names ("OBJECT AY" and friends) are deliberately NOT mapped: they are recycled
  * between objects and would sign the wrong satellite. LoTWConfigTest asserts that every target
  * here is a real config.tq6 name.
@@ -79,11 +81,11 @@ object LoTWSatelliteAliases {
         "OSCAR16PACSAT" to "AO-16", "OSCAR19LUSAT" to "LO-19", "OSCAR64" to "DO-64",
         "OSCAR7" to "AO-7", "PACSAT" to "AO-16", "PARKINSONSAT" to "NO-84",
         "PCSAT" to "NO-44", "PHILLIPINESOSCAR101" to "PO-101", "PO101" to "PO-101",
-        "PSAT" to "NO-84", "PSAT2" to "NO-104", "QB50P1" to "EO-79",
+        "PSAT" to "NO-84", "PSAT2" to "NO-104", "QB50P1" to "EO-79", "QMRKWT2" to "RS95S",
         "QO100" to "QO-100", "RADFXSAT" to "AO-91", "RADIOROSTO" to "RS-15",
         "RS0ISS" to "ARISS", "RS14" to "AO-21", "RS15" to "RS-15",
-        "RS44" to "RS-44", "RS64S" to "AO-123", "SAUDISAT1C" to "SO-50",
+        "RS44" to "RS-44", "RS64S" to "AO-123", "RS95S" to "RS95S",
-        "SO121" to "SO-121", "SO124" to "SO-124", "SO125" to "SO-125",
+        "SAUDISAT1C" to "SO-50", "SO121" to "SO-121", "SO124" to "SO-124", "SO125" to "SO-125",
         "SO50" to "SO-50", "SOLUTUSNANOSATTELITE" to "SONATE", "SONATE2" to "SONATE",
         "TAURUS1" to "TAURUS", "TEVEL21" to "TEV2-1", "TEVEL22" to "TEV2-2",
         "TEVEL23" to "TEV2-3", "TEVEL24" to "TEV2-4", "TEVEL25" to "TEV2-5",

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

@@ -18,6 +18,7 @@
 package com.rtbishop.look4sat.core.domain.logbook
 
 import com.rtbishop.look4sat.core.domain.repository.LoTWProblem
+import com.rtbishop.look4sat.core.domain.repository.LoTWUploadAudit
 
 /**
  * Wording for the reasons a QSO cannot be signed for LoTW.
@@ -69,3 +70,14 @@ fun unavailableUploadSummary(
     val detail = parts.joinToString(", ").ifBlank { "check the logbook" }
     return "$subject — $detail"
 }
+
+/**
+ * True when a batch that has nothing uploadable still has to reach the preview dialog.
+ *
+ * The preview is the only place that carries the callsign-conflict actions (rewrite the records, or
+ * upload them under another certificate). Short-circuiting such a batch into the plain "can't be
+ * uploaded" message strands exactly the records the operator needs to act on — the message has no
+ * buttons to get out of, so those QSOs could never be uploaded.
+ */
+fun LoTWUploadAudit.needsPreviewForConflicts(): Boolean =
+    pending == 0 && (reasons[LoTWProblem.CALLSIGN_MISMATCH] ?: 0) > 0

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

@@ -48,6 +48,8 @@ data class QsoRecord(
     val wavelogStation: String = "",
     val lotwReceived: Boolean = false,
     val lotwQslDate: String = "",
+    /** Own operated grid set this QSO went out under — uploaded as ADIF MY_VUCC_GRIDS
+     *  (never VUCC_GRIDS, which belongs to the opposite station). Stamped at upload. */
     val vuccGrids: List<String> = emptyList(),
     val dxcc: Int? = null,
     val country: String = "",

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/LoTWSatelliteAliasesTest.kt

@@ -27,7 +27,7 @@ import org.junit.Test
 /** Alias table that maps tracker catalogue names onto the names ARRL's config.tq6 uses. */
 class LoTWSatelliteAliasesTest {
 
-    private val catalogue = listOf("SO-50", "ARISS", "PO-101", "BO-102", "AO-91", "RS-44", "IO-117")
+    private val catalogue = listOf("SO-50", "ARISS", "PO-101", "BO-102", "AO-91", "RS-44", "IO-117", "RS95S")
 
     @Test
     fun `lookup maps SatNOGS catalogue names to ARRL names`() {
@@ -37,6 +37,7 @@ class LoTWSatelliteAliasesTest {
         assertEquals("AO-91", LoTWSatelliteAliases.lookup("FOX-1B"))
         assertEquals("RS-44", LoTWSatelliteAliases.lookup("DOSAAF-85"))
         assertEquals("IO-117", LoTWSatelliteAliases.lookup("GREENCUBE"))
+        assertEquals("RS95S", LoTWSatelliteAliases.lookup("QMR-KWT 2"))
     }
 
     @Test
@@ -59,6 +60,8 @@ class LoTWSatelliteAliasesTest {
         assertEquals("SO-50", LoTWSatelliteAliases.resolve("SAUDISAT 1C (SO-50)", catalogue))
         assertEquals("ARISS", LoTWSatelliteAliases.resolve("ISS (ZARYA)", catalogue))
         assertEquals("AO-91", LoTWSatelliteAliases.resolve("AO-91 (RadFxSat)", catalogue))
+        assertEquals("RS95S", LoTWSatelliteAliases.resolve("RS-95S", catalogue))
+        assertEquals("RS95S", LoTWSatelliteAliases.resolve("QMR-KWT 2", catalogue))
     }
 
     @Test

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

@@ -10,6 +10,7 @@
 package com.rtbishop.look4sat.core.domain.logbook
 
 import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Test
 
@@ -22,8 +23,10 @@ class AdifCodecTest {
             endUtcMillis = 1_700_000_000_100L,
             theirCallsign = "BG5JVM",
             myCallsign = "BA7OPF",
-            theirGrid = "OM60",
+            theirGrid = "EN52",
+            theirVuccGrids = listOf("EN52", "EN53"),
             myGrid = "OL62TI",
+            vuccGrids = listOf("OL62", "OL61"),
             sentReport = "59",
             receivedReport = "59",
             txFrequencyHz = 145_850_000L,
@@ -36,8 +39,7 @@ class AdifCodecTest {
             propagationMode = "SAT",
             status = QsoStatus.COMPLETE,
             lotwConfirmed = true,
-            lotwQslDate = "2026-09-20",
+            lotwQslDate = "2026-09-20"
-            vuccGrids = listOf("OM60", "OM50")
         )
         val decoded = AdifCodec.decode(AdifCodec.encode(listOf(record))).single()
         assertEquals(record.startUtcMillis, decoded.startUtcMillis)
@@ -47,12 +49,18 @@ class AdifCodecTest {
         assertEquals("2M", decoded.band)
         assertEquals("70CM", decoded.rxBand)
         assertTrue(decoded.lotwConfirmed)
-        assertEquals(listOf("OM60", "OM50"), decoded.vuccGrids)
+        // Grid directions survive a round trip: the opposite's set stays theirs,
+        // the operator's own set stays theirs.
+        assertEquals("EN52", decoded.theirGrid)
+        assertEquals(listOf("EN52", "EN53"), decoded.theirVuccGrids)
+        assertEquals("OL62TI", decoded.myGrid)
+        assertEquals(listOf("OL62", "OL61"), decoded.vuccGrids)
     }
 
     @Test
     fun decode_lotwStyleReportFields() {
-        // LoTW report subset: lowercase eor, alphabetical fields, VUCC_GRIDS list.
+        // LoTW report subset: lowercase eor, alphabetical fields. The un-prefixed
+        // grid fields belong to the OPPOSITE station, MY_* fields to the operator.
         val adi = """
             <EOH>
             <CALL:6>BH6RJD
@@ -64,8 +72,9 @@ class AdifCodecTest {
             <BAND:3>2M
             <BAND_RX:4>70CM
             <GRIDSQUARE:4>OM60
-            <MY_GRIDSQUARE:8>OM60IL70
             <VUCC_GRIDS:9>OM60,OM50
+            <MY_GRIDSQUARE:6>OL62TI
+            <MY_VUCC_GRIDS:9>OL62,OL61
             <STATION_CALLSIGN:6>BH6RJD
             <DXCC:3>318
             <COUNTRY:5>China
@@ -78,12 +87,27 @@ class AdifCodecTest {
         assertEquals("BH6RJD", record.theirCallsign)
         assertEquals("SO-50", record.satelliteName)
         assertEquals("FM", record.displayMode)
-        assertEquals("OM60IL70", record.myGrid)
+        assertEquals("OM60", record.theirGrid)
-        assertEquals(listOf("OM60", "OM50"), record.vuccGrids)
+        assertEquals(listOf("OM60", "OM50"), record.theirVuccGrids)
+        assertEquals("OL62TI", record.myGrid)
+        assertEquals(listOf("OL62", "OL61"), record.vuccGrids)
         assertTrue(record.lotwConfirmed)
         assertTrue(record.isSatellite)
     }
 
+    @Test
+    fun decodeWavelogPullStyleRecordKeepsGridDirections() {
+        // Wavelog's export: the OPPOSITE station's grids un-prefixed, the station
+        // profile's grid under MY_*. A pull must not flip them into each other.
+        val adi = "<EOH><CALL:6>BG5JVM<QSO_DATE:8>20260916<TIME_ON:4>0745" +
+            "<VUCC_GRIDS:9>EN52,EN53<MY_GRIDSQUARE:6>OL62TI<MY_VUCC_GRIDS:9>OL62,OL61" +
+            "<MODE:2>FM<PROP_MODE:3>SAT<SAT_NAME:5>SO-50<EOR>"
+        val record = AdifCodec.decode(adi).single()
+        assertEquals(listOf("EN52", "EN53"), record.theirVuccGrids)
+        assertEquals("OL62TI", record.myGrid)
+        assertEquals(listOf("OL62", "OL61"), record.vuccGrids)
+    }
+
     @Test
     fun encodeOmitsStationCallsignForWavelog() {
         val record = QsoRecord(
@@ -99,4 +123,44 @@ class AdifCodecTest {
         assertTrue(adif.contains("<CALL:6>N0CALL"))
         assertTrue(adif.contains("<SAT_NAME:5>SO-50"))
     }
+
+    @Test
+    fun encodeKeepsOwnGridsOutOfTheOppositeVuccField() {
+        // The reported defect: an operator's stamped own grid set must never land in
+        // VUCC_GRIDS — Wavelog displays that field as the OPPOSITE station's grid.
+        val record = QsoRecord(
+            startUtcMillis = 1_700_000_000_000L,
+            theirCallsign = "N0CALL",
+            myCallsign = "BA7OPF",
+            myGrid = "OL62TI",
+            vuccGrids = listOf("OL62"),
+            satelliteName = "SO-50"
+        )
+        val adif = AdifCodec.encode(listOf(record), includeStationCallsign = false)
+        assertTrue(adif.contains("<MY_VUCC_GRIDS:4>OL62"))
+        assertFalse(adif.contains("<VUCC_GRIDS:"))
+        assertFalse(adif.contains("<GRIDSQUARE:"))
+    }
+
+    @Test
+    fun encodeWritesTheOppositeMultiGridSetToVuccGrids() {
+        val multi = QsoRecord(
+            startUtcMillis = 1_700_000_000_000L,
+            theirCallsign = "N0CALL",
+            myCallsign = "BA7OPF",
+            theirGrid = "EN52",
+            theirVuccGrids = listOf("EN52", "EN53"),
+            satelliteName = "SO-50"
+        )
+        val multiAdif = AdifCodec.encode(listOf(multi), false)
+        assertTrue(multiAdif.contains("<GRIDSQUARE:4>EN52"))
+        assertTrue(multiAdif.contains("<VUCC_GRIDS:9>EN52,EN53"))
+
+        // A single opposite grid rides in GRIDSQUARE only; one value inside the VUCC
+        // field would trigger Wavelog's single-grid warning in its QSO view.
+        val single = multi.copy(theirVuccGrids = listOf("EN52"))
+        val singleAdif = AdifCodec.encode(listOf(single), false)
+        assertTrue(singleAdif.contains("<GRIDSQUARE:4>EN52"))
+        assertFalse(singleAdif.contains("<VUCC_GRIDS:"))
+    }
 }

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

@@ -0,0 +1,59 @@
+/*
+ * 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.logbook
+
+import com.rtbishop.look4sat.core.domain.repository.LoTWProblem
+import com.rtbishop.look4sat.core.domain.repository.LoTWUploadAudit
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * The preview dialog is the only place carrying the callsign-conflict actions (rewrite / use another
+ * certificate), so a conflict-only batch must NOT be short-circuited into the plain
+ * "can't be uploaded" message: that dialog has no buttons to get out of.
+ */
+class LoTWUploadMessagesTest {
+
+    @Test
+    fun `conflict-only batch asks for the preview even with nothing pending`() {
+        assertTrue(audit(pending = 0, mismatch = 107, satellite = 1).needsPreviewForConflicts())
+    }
+
+    @Test
+    fun `blocked batch without conflicts keeps the plain message`() {
+        assertFalse(audit(pending = 0, mismatch = 0, satellite = 3).needsPreviewForConflicts())
+    }
+
+    @Test
+    fun `batch with something to upload never takes the conflict fallback`() {
+        assertFalse(audit(pending = 5, mismatch = 2, satellite = 1).needsPreviewForConflicts())
+    }
+
+    private fun audit(pending: Int, mismatch: Int, satellite: Int) = LoTWUploadAudit(
+        total = 108,
+        pending = pending,
+        uploaded = 0,
+        unknown = 0,
+        unavailable = 108 - pending,
+        reasons = buildMap {
+            if (mismatch > 0) put(LoTWProblem.CALLSIGN_MISMATCH, mismatch)
+            if (satellite > 0) put(LoTWProblem.SATELLITE, satellite)
+        }
+    )
+}

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

@@ -19,6 +19,10 @@
     <string name="sat_search_clear">Vaciar</string>
     <string name="sat_clear_all">Vaciar todo</string>
     <string name="sat_select_all">Seleccionar todo</string>
+    <string name="sat_group_selected">Seleccionados</string>
+    <string name="sat_group_available">Disponibles</string>
+    <string name="sat_group_selected_count">Seleccionados (%1$d)</string>
+    <string name="sat_group_available_count">Disponibles (%1$d)</string>
     <string name="sat_empty_list_message">
         Asegúrese de que su consulta de búsqueda sea correcta y que la base de datos esté actualizada</string>
     <string name="sat_warning_title">Alarma\!</string>

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

@@ -19,6 +19,10 @@
     <string name="sat_search_clear">Очистить</string>
     <string name="sat_clear_all">Очистить</string>
     <string name="sat_select_all">Выбрать</string>
+    <string name="sat_group_selected">Выбранные</string>
+    <string name="sat_group_available">Доступные</string>
+    <string name="sat_group_selected_count">Выбранные (%1$d)</string>
+    <string name="sat_group_available_count">Доступные (%1$d)</string>
     <string name="sat_empty_list_message">Убедитесь, что ваш поисковый запрос верен и база данных обновлена</string>
     <string name="sat_warning_title">Внимание\!</string>
     <string name="sat_warning_message">

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

@@ -19,6 +19,10 @@
     <string name="sat_search_clear">පිරිසිදු ක°</string>
     <string name="sat_clear_all">සියල්ල පිරිසිදු ක°</string>
     <string name="sat_select_all">සියල්ල තෝරන්න</string>
+    <string name="sat_group_selected">තෝරාගත්</string>
+    <string name="sat_group_available">තිබෙන</string>
+    <string name="sat_group_selected_count">තෝරාගත් (%1$d)</string>
+    <string name="sat_group_available_count">තිබෙන (%1$d)</string>
     <string name="sat_empty_list_message">
         ඔබගේ සෙවුම් විමසුම නිවැරදි බවත් දත්ත සමුදාය යාවත්කාලීන කර ඇති බවත් සහතික කර ගන්න</string>
     <string name="sat_warning_title">අවවාදයයි\!</string>

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

@@ -20,6 +20,10 @@
     <string name="sat_search_clear">Temizle</string>
     <string name="sat_clear_all">Tümünü temizle</string>
     <string name="sat_select_all">Tümünü seç</string>
+    <string name="sat_group_selected">Seçilenler</string>
+    <string name="sat_group_available">Kullanılabilir</string>
+    <string name="sat_group_selected_count">Seçilenler (%1$d)</string>
+    <string name="sat_group_available_count">Kullanılabilir (%1$d)</string>
     <string name="sat_empty_list_message">"Arama sorgunuzun doğru olduğundan ve veritabanının güncellendiğinden emin olun"</string>
     <string name="sat_warning_title">Uyarı\!</string>
     <string name="sat_warning_message">

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

@@ -19,6 +19,10 @@
     <string name="sat_search_clear">Очистити</string>
     <string name="sat_clear_all">Очистити всі</string>
     <string name="sat_select_all">Вибрати всі</string>
+    <string name="sat_group_selected">Обрані</string>
+    <string name="sat_group_available">Доступні</string>
+    <string name="sat_group_selected_count">Обрані (%1$d)</string>
+    <string name="sat_group_available_count">Доступні (%1$d)</string>
     <string name="sat_empty_list_message">
         Переконайтеся, що ваш пошуковий запит правильний, а база даних оновлена</string>
     <string name="sat_warning_title">Увага\!</string>

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

@@ -20,6 +20,10 @@
     <string name="sat_search_clear">清空</string>
     <string name="sat_clear_all">全部清空</string>
     <string name="sat_select_all">全选</string>
+    <string name="sat_group_selected">已选择</string>
+    <string name="sat_group_available">可用</string>
+    <string name="sat_group_selected_count">已选择（%1$d）</string>
+    <string name="sat_group_available_count">可用（%1$d）</string>
     <string name="sat_empty_list_message">请确保您的搜索查询正确且数据库已更新</string>
     <string name="sat_warning_title">警告\!</string>
     <string name="sat_warning_message">此应用收录了超过9000颗卫星信息\n同时追踪所有卫星并不现实\n建议始终通过搜索和分类筛选功能仅勾选您感兴趣的卫星</string>

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

@@ -21,6 +21,10 @@
     <string name="sat_search_clear">Clear</string>
     <string name="sat_clear_all">Clear all</string>
     <string name="sat_select_all">Select all</string>
+    <string name="sat_group_selected">Selected</string>
+    <string name="sat_group_available">Available</string>
+    <string name="sat_group_selected_count">Selected (%1$d)</string>
+    <string name="sat_group_available_count">Available (%1$d)</string>
     <string name="sat_empty_list_message">"Make sure your search query is correct and the DB is updated"</string>
     <string name="sat_warning_title">Warning\!</string>
     <string name="sat_warning_message">

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

@@ -82,7 +82,10 @@ class MutualViewModel(
     private val settingsRepo: ISettingsRepo,
     // Injected so unit tests can run the pass computation on a test dispatcher;
     // production callers keep the CPU-bound pool default.
-    private val computeDispatcher: CoroutineDispatcher = Dispatchers.Default
+    private val computeDispatcher: CoroutineDispatcher = Dispatchers.Default,
+    // Injected so unit tests can pin the wall clock to the fixture TLE epoch and
+    // stay deterministic; production callers keep the real clock default.
+    private val nowMillis: () -> Long = System::currentTimeMillis
 ) : ViewModel() {
 
     private val _uiState = MutableStateFlow(MutualUiState())
@@ -303,7 +306,7 @@ class MutualViewModel(
         queryGeneration += 1
 
         viewModelScope.launch {
-            val now = System.currentTimeMillis()
+            val now = nowMillis()
             // 转发器类型筛选: 使用硬编码 AMSAT Live 清单 (见 Sources):
             // FM = {SO-50, ISS ZARYA, AO-123}, Linear = {RS-44, FO-29,
             // AO-7, AO-73, JO-97}. 不再依赖 AMSAT 网页同步: 任何网络下都

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

@@ -53,7 +53,9 @@ class MutualViewModelTest {
     ): MutualViewModel = MutualViewModel(
         satelliteRepo = FakeSatelliteRepo(satellites, passes),
         settingsRepo = FakeSettingsRepo(position),
-        computeDispatcher = StandardTestDispatcher(mainDispatcherRule.dispatcher.scheduler)
+        computeDispatcher = StandardTestDispatcher(mainDispatcherRule.dispatcher.scheduler),
+        // Pin the clock to the fixture base so results never depend on wall time.
+        nowMillis = { TestOrbits.FIXTURE_BASE }
     )
 
     private fun TestScope.queryAndSettle(vm: MutualViewModel) {
@@ -219,7 +221,7 @@ class MutualViewModelTest {
         assertTrue(state.mutualPasses.all { it.catNum == 25544 })
         assertTrue(state.mutualPasses.all { it.name == "ISS (ZARYA)" })
         // AOS/LOS within the searched horizon
-        val now = System.currentTimeMillis()
+        val now = TestOrbits.FIXTURE_BASE
         assertTrue(state.mutualPasses.all { it.startTime >= now - 120_000L })
         assertTrue(state.mutualPasses.all { it.endTime <= now + 12 * 3600_000L + 120_000L })
     }

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

@@ -48,6 +48,15 @@ object TestOrbits {
         )
     )
 
+    /**
+     * Fixed wall-clock base for every fixture computation: 2024-03-10T00:00Z,
+     * ~18 h after [ISS]'s TLE epoch, so SGP4 propagates an accurate, healthy
+     * orbit. Tests pin the ViewModel clock to this value as well
+     * (MutualViewModel.nowMillis), which makes pass windows deterministic
+     * instead of rotting as the fixture ages against System.currentTimeMillis().
+     */
+    val FIXTURE_BASE: Long = 1710028800000L
+
     /** Guangzhou (default BA7OPF grid OL62/OL63 area). */
     val GUANGZHOU = GeoPos(23.13, 113.26)
 
@@ -85,7 +94,7 @@ object TestOrbits {
     fun findPassWindows(
         sat: OrbitalObject = ISS,
         pos: GeoPos = GUANGZHOU,
-        time: Long = System.currentTimeMillis(),
+        time: Long = FIXTURE_BASE,
         hoursAhead: Int = 12
     ): List<OrbitalPass> {
         if (!sat.willBeSeen(pos)) return emptyList()

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

@@ -431,7 +431,10 @@ private fun UploadPreviewDialog(
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
                 Text("${preview.callsign}  DXCC ${preview.dxcc}  Grid ${preview.grid}", fontSize = 13.sp)
-                Text("${preview.count} QSO(s) · ${
+                val range = if (preview.firstUtc.isBlank()) {
+                    // A blocked batch (shown for its conflict actions) has no date range to show.
+                    "${preview.count} QSO(s)"
+                } else "${preview.count} QSO(s) · ${
                     java.text.SimpleDateFormat("MM-dd HH:mm", java.util.Locale.US).apply {
                         timeZone = java.util.TimeZone.getTimeZone("UTC")
                     }.format(java.util.Date(preview.firstUtc.let {
@@ -447,7 +450,8 @@ private fun UploadPreviewDialog(
                             timeZone = java.util.TimeZone.getTimeZone("UTC")
                         }.parse(it).time }.getOrDefault(System.currentTimeMillis())
                     }))
-                }Z", fontSize = 13.sp)
+                }Z"
+                Text(range, fontSize = 13.sp)
                 if (preview.skipped > 0 || preview.unknownSkipped > 0 || preview.unavailableSkipped > 0) {
                     val parts = buildList {
                         // skipped counts every record left out of this batch: previously-uploaded
@@ -498,7 +502,8 @@ private fun UploadPreviewDialog(
             }
         },
         confirmButton = {
-            TextButton(onClick = onConfirm, enabled = !busy) { Text("确认上传") }
+            // Nothing uploadable (a conflict-only batch): the actions above are the way out.
+            TextButton(onClick = onConfirm, enabled = !busy && preview.count > 0) { Text("确认上传") }
         },
         dismissButton = {
             TextButton(onClick = onDismiss) { Text("Cancel") }

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

@@ -18,6 +18,7 @@ import com.rtbishop.look4sat.core.domain.logbook.QsoRecord
 import com.rtbishop.look4sat.core.domain.logbook.QsoStatus
 import com.rtbishop.look4sat.core.domain.logbook.displayMode
 import com.rtbishop.look4sat.core.domain.logbook.frequencyBand
+import com.rtbishop.look4sat.core.domain.logbook.needsPreviewForConflicts
 import com.rtbishop.look4sat.core.domain.logbook.officialSatelliteName
 import com.rtbishop.look4sat.core.domain.logbook.satelliteIdentity
 import com.rtbishop.look4sat.core.domain.logbook.unavailableUploadSummary
@@ -286,7 +287,10 @@ class LogViewModel(
                 // LoTW-imported confirmations are the feedback side.
                 val pending = all.filter { !it.lotwConfirmed && !it.lotwUploaded && it.status == QsoStatus.COMPLETE }
                 val audit = lotwUploadRepository.audit(pending)
-                if (audit.pending == 0) {
+                // A batch held back only by callsign conflicts still gets the preview: that dialog
+                // carries the rewrite / use-another-certificate actions. Without this the operator
+                // gets a dead-end message and those records can never be uploaded.
+                if (audit.pending == 0 && !audit.needsPreviewForConflicts()) {
                     val msg = when {
                         audit.unavailable > 0 -> unavailableUploadSummary(
                             audit.unavailable, audit.reasons, audit.details, audit.duplicates, audit.incomplete

feature/satellites/src/main/java/com/rtbishop/look4sat/feature/satellites/SatellitesScreen.kt

@@ -326,9 +326,52 @@ private fun SatellitesPreview() {
 
 @Composable
 private fun SatellitesCard(items: List<SatItem>, onSelected: (Int, Boolean) -> Unit) {
+    val selectedItems = items.filter { it.isSelected }
+    val availableItems = items.filterNot { it.isSelected }
+
     LazyVerticalGrid(columns = GridCells.Adaptive(320.dp)) {
-        items(items = items, key = { item -> item.catnum }) { entry ->
+        stickyHeader(key = "sat_summary_header") {
-            Satellite(entry, onSelected, Modifier.animateItem())
+            SummaryHeader(
+                selectedText = stringResource(R.string.sat_group_selected_count, selectedItems.size),
+                availableText = stringResource(R.string.sat_group_available_count, availableItems.size)
+            )
+        }
+
+        if (selectedItems.isNotEmpty()) {
+            items(items = selectedItems, key = { item -> item.catnum }) { entry ->
+                Satellite(entry, onSelected, Modifier.animateItem())
+            }
+        }
+
+        if (availableItems.isNotEmpty()) {
+            items(items = availableItems, key = { item -> item.catnum }) { entry ->
+                Satellite(entry, onSelected, Modifier.animateItem())
+            }
         }
     }
 }
+
+@Composable
+private fun SummaryHeader(selectedText: String, availableText: String) {
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.SpaceBetween,
+        modifier = Modifier
+            .fillMaxWidth()
+            .background(MaterialTheme.colorScheme.surfaceContainerHighest)
+            .padding(horizontal = 12.dp, vertical = 4.dp)
+    ) {
+        Text(
+            text = selectedText,
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.SemiBold,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Text(
+            text = availableText,
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.SemiBold,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+    }
+}

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

@@ -299,7 +299,9 @@ private fun LogbookUploadPreviewDialog(
             Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
                 Text("${preview.callsign}  DXCC ${preview.dxcc}  Grid ${preview.grid}", fontSize = 13.sp)
                 Text(
-                    "${preview.count} QSO(s) · ${preview.firstUtc} – ${preview.lastUtc}",
+                    // A blocked batch (shown for its conflict actions) has no date range to show.
+                    if (preview.firstUtc.isBlank()) "${preview.count} QSO(s)"
+                    else "${preview.count} QSO(s) · ${preview.firstUtc} – ${preview.lastUtc}",
                     fontSize = 13.sp
                 )
                 if (preview.skipped > 0 || preview.unknownSkipped > 0 || preview.unavailableSkipped > 0) {
@@ -357,7 +359,9 @@ private fun LogbookUploadPreviewDialog(
             }
         },
         confirmButton = {
-            TextButton(onClick = onConfirm, enabled = !busy) {
+            // Nothing uploadable (a conflict-only batch): the actions above are the way out, so the
+            // upload button stays disabled instead of failing with an expired preview.
+            TextButton(onClick = onConfirm, enabled = !busy && preview.count > 0) {
                 Text(stringResource(R.string.prefs_logbook_upload_confirm))
             }
         },

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

@@ -46,6 +46,7 @@ import com.rtbishop.look4sat.core.domain.repository.WavelogUploadOutcome
 import com.rtbishop.look4sat.core.domain.repository.WavelogUploadPreview
 import com.rtbishop.look4sat.core.domain.usecase.IShowToast
 import com.rtbishop.look4sat.core.domain.utility.VersionComparator
+import com.rtbishop.look4sat.core.domain.logbook.needsPreviewForConflicts
 import com.rtbishop.look4sat.core.domain.logbook.resubmitCandidates
 import com.rtbishop.look4sat.core.domain.logbook.toConfirmedRecord
 import com.rtbishop.look4sat.core.domain.logbook.unavailableUploadSummary
@@ -576,7 +577,10 @@ class SettingsViewModel(
                 // LoTW-imported confirmations are the feedback side.
                 val pending = all.filter { !it.lotwConfirmed && !it.lotwUploaded && it.status == com.rtbishop.look4sat.core.domain.logbook.QsoStatus.COMPLETE }
                 val audit = lotwUploadRepository.audit(pending)
-                if (audit.pending == 0) {
+                // A batch held back only by callsign conflicts still gets the preview: that dialog
+                // carries the rewrite / use-another-certificate actions. Without this the operator
+                // gets a dead-end message and those records can never be uploaded.
+                if (audit.pending == 0 && !audit.needsPreviewForConflicts()) {
                     val msg = when {
                         audit.unavailable > 0 -> com.rtbishop.look4sat.core.domain.logbook.unavailableUploadSummary(
                             audit.unavailable, audit.reasons, audit.details, audit.duplicates, audit.incomplete

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "578"
+appVersionCode = "580"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.8-ba7opf.11.3"
+appVersionName = "4.4.8-ba7opf.11.5"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry