feat(wavelog): group log entries by pass session (satellite + AOS timestamp)

User request: logs should be separated by satellite/pass. Each pass
session gets an ID = satellite name + AOS timestamp (the second the
elevation hits 0, from OrbitalPass.aosTime), e.g.
"ASRTU-1-20260804-2014". Log page groups entries by session:
group title (satellite - local time) + thick divider line between
groups (md --- style); legacy entries without sessionId fall into
"Ungrouped" at the end.

- WavelogQso: +sessionId (persisted in queue JSON)
- LogTab: sessionId built from satelliteName + aosTimeMs (radar page
  passes currentPass.aosTime)
- WavelogLogScreen: grouped rendering + wavelog_ungrouped string (4 locales)
- sessionId UTC yyyyMMdd-HHmm; display converts to local time

Verified: check_strings OK (9 files); :app:compileDebugKotlin
BUILD SUCCESSFUL. Not released (batched).

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

@@ -88,6 +88,7 @@ fun LogTab(
     wavelogConfigured: Boolean,
     showToast: (String) -> Unit,
     txBaseFrequencyHz: Long? = null,
+    aosTimeMs: Long = 0L,
     modifier: Modifier = Modifier
 ) {
     var selectedUuid by remember { mutableStateOf<String?>(null) }
@@ -159,6 +160,7 @@ fun LogTab(
                 queue = queue,
                 showToast = showToast,
                 txBaseFrequencyHz = txBaseFrequencyHz,
+                aosTimeMs = aosTimeMs,
                 onSaved = { refreshTick++ }
             )
         }
@@ -225,6 +227,7 @@ private fun ExpandedLogInput(
     queue: WavelogQueue,
     showToast: (String) -> Unit,
     txBaseFrequencyHz: Long? = null,
+    aosTimeMs: Long = 0L,
     onSaved: () -> Unit
 ) {
     var callsign by remember { mutableStateOf("") }
@@ -246,7 +249,8 @@ private fun ExpandedLogInput(
                 mode = mode.trim().ifBlank { "FM" }.uppercase(),
                 freqTxHz = tx,
                 freqRxHz = rx,
-                satName = satelliteName
+                satName = satelliteName,
+                sessionId = buildSessionId(satelliteName, aosTimeMs)
             )
         )
         callsign = ""
@@ -448,3 +452,14 @@ private fun formatLocalTime(utcMs: Long): String {
     cal.timeInMillis = utcMs
     return "%02d:%02d".format(cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE))
 }
+
+/** 场次 ID: 卫星名-AOS 时间戳(UTC yyyyMMdd-HHmm); 无 AOS 时用回车时刻 */
+private fun buildSessionId(satName: String, aosTimeMs: Long): String {
+    val cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+    cal.timeInMillis = if (aosTimeMs > 0) aosTimeMs else System.currentTimeMillis()
+    val stamp = "%04d%02d%02d-%02d%02d".format(
+        cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DAY_OF_MONTH),
+        cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)
+    )
+    return "$satName-$stamp"
+}

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

@@ -299,7 +299,8 @@ private fun PagerCard(
                         queue = wavelogQueue,
                         wavelogConfigured = wavelogConfigured,
                         showToast = showToast,
-                        txBaseFrequencyHz = uiState.radioControl.txBaseFrequencyHz
+                        txBaseFrequencyHz = uiState.radioControl.txBaseFrequencyHz,
+                        aosTimeMs = uiState.currentPass?.aosTime ?: 0L
                     )
                 }
             }

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

@@ -95,7 +95,27 @@ fun WavelogLogScreen(
                     modifier = Modifier.padding(horizontal = 10.dp, vertical = 12.dp)
                 )
             } else {
-                entries.forEachIndexed { index, entry ->
+                // 按场次分组(sessionId = 卫星名-AOS 时间戳); 空 sessionId 归"未分组"放最后
+                val groups = entries.groupBy { it.sessionId.ifBlank { UNGROUPED } }
+                    .toSortedMap(compareByDescending<String> { id ->
+                        entries.filter { it.sessionId.ifBlank { UNGROUPED } == id }.minOfOrNull { it.timeUtcMs } ?: 0L
+                    }.thenByDescending { it })
+                groups.forEach { (sessionId, groupEntries) ->
+                    // 组标题(场次名 + 本地时间)
+                    val (satPart, timePart) = parseSession(sessionId)
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            text = if (sessionId == UNGROUPED) stringResource(id = R.string.wavelog_ungrouped)
+                            else "$satPart - ${formatSessionTime(timePart)}",
+                            fontSize = 12.sp,
+                            fontWeight = FontWeight.Bold,
+                            color = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.padding(horizontal = 10.dp, vertical = 6.dp)
+                        )
+                    }
+                    // 组间横线(md --- 效果)
+                    HorizontalDivider(thickness = 1.5.dp, color = GridLineColor)
+                    groupEntries.forEach { entry ->
                     SwipeDeleteRow(
                         onDelete = {
                             queue.remove(entry.id)
@@ -133,6 +153,7 @@ fun WavelogLogScreen(
                         }
                     }
                 }
+                }
             }
         }
     }
@@ -173,6 +194,38 @@ private fun RowScope.Cell(text: String, width: Dp, weight: Float = 0f) {
     )
 }
 
+private const val UNGROUPED = "__ungrouped__"
+
+/** 解析场次 ID: "ASRTU-1-20260804-2014" → (卫星名, "20260804-2014") */
+private fun parseSession(sessionId: String): Pair<String, String> {
+    val parts = sessionId.split('-')
+    if (parts.size < 3) return sessionId to ""
+    val timePart = parts.takeLast(2).joinToString("-")
+    val satPart = parts.dropLast(2).joinToString("-")
+    return satPart to timePart
+}
+
+/** 场次时间(UTC "20260804-2014") → 本地 "MM-dd HH:mm" */
+private fun formatSessionTime(timePart: String): String {
+    if (timePart.length != 13 || timePart[8] != '-') return timePart
+    return try {
+        val year = timePart.substring(0, 4).toInt()
+        val month = timePart.substring(4, 6).toInt()
+        val day = timePart.substring(6, 8).toInt()
+        val hour = timePart.substring(9, 11).toInt()
+        val minute = timePart.substring(11, 13).toInt()
+        val cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+        cal.set(year, month - 1, day, hour, minute, 0)
+        cal.timeInMillis = cal.timeInMillis + TimeZone.getDefault().getOffset(cal.timeInMillis)
+        "%02d-%02d %02d:%02d".format(
+            cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DAY_OF_MONTH),
+            cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)
+        )
+    } catch (_: Exception) {
+        timePart
+    }
+}
+
 private fun formatLocalTime(utcMs: Long): String {
     val cal = Calendar.getInstance(TimeZone.getDefault())
     cal.timeInMillis = utcMs