fix: AMSAT live page timeouts wiped FM/Linear lists; add fallback

Root cause of the recurring empty AMSAT Live filters: OkHttp defaults to a
10s read timeout and amsat.org's live pages take 7-10s+ from many
networks — every sync timed out, fmNames/linearNames stayed empty, and
(with no previous list, e.g. right after clearing data) the filters were
written as EMPTY. The stale pre-whitelist FM list survived only because
older syncs had occasionally succeeded and the failure path preserved it.

Fix:
1. OkHttp timeouts raised (connect 20s / read 30s / write 30s / call 60s)
   in MainContainer.provideRemoteSource so slow AMSAT pages actually load.
2. updateAmSatLiveLists gains a last-resort fallback: when the AMSAT page
   is down AND there is no previous list to clean, derive FM/Linear from
   the local transceivers (FM / SSB,CW,USB,LSB modes) intersected with
   the amateur whitelist, so a network timeout never wipes the filters.
   ISS module aliases stay excluded by the whitelist intersection.

Regression test: page fails + empty previous list -> fallback yields
{25544} (26700 excluded by whitelist).

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

@@ -74,6 +74,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import okhttp3.OkHttpClient
+import java.util.concurrent.TimeUnit
 
 class MainContainer(private val context: Context) : IMainContainer {
 
@@ -177,7 +178,16 @@ class MainContainer(private val context: Context) : IMainContainer {
     }
 
     private fun provideRemoteSource(): IRemoteSource {
-        return RemoteSource(Dispatchers.IO, context.contentResolver, OkHttpClient.Builder().build())
+        // amsat.org live pages are slow (7-10s+ from some networks); the
+        // OkHttp defaults (10s read timeout) made every AMSAT Live update
+        // time out, silently keeping stale FM/Linear lists forever.
+        val client = OkHttpClient.Builder()
+            .connectTimeout(20, TimeUnit.SECONDS)
+            .readTimeout(30, TimeUnit.SECONDS)
+            .writeTimeout(30, TimeUnit.SECONDS)
+            .callTimeout(60, TimeUnit.SECONDS)
+            .build()
+        return RemoteSource(Dispatchers.IO, context.contentResolver, client)
     }
 
     private fun provideSatelliteRepo(): ISatelliteRepo {

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

@@ -181,10 +181,20 @@ class DatabaseRepo(
                 previous.mapNotNull { catnum ->
                     nameToCatnum.entries.firstOrNull { it.value == catnum }?.key
                 }.flatMap { resolvePerName(it) }.toSet()
+            // Last-resort fallback when the AMSAT page is down AND there is no
+            // previous list to clean (e.g. right after clearing data): derive
+            // the FM/Linear sets from the local transceivers intersected with
+            // the amateur whitelist, so a network timeout never wipes the
+            // filters to empty.
+            val fmFallback = localSource.getIdsWithModes(listOf("FM")).toSet().intersect(activeCatnums)
+            val linearFallback = localSource
+                .getIdsWithModes(listOf("SSB", "CW", "USB", "LSB")).toSet().intersect(activeCatnums)
             val fmCatnums = fmNames.flatMap { resolvePerName(it) }.toSet()
                 .ifEmpty { cleanStaleList(settingsRepo.getAmSatFmCatnums()) }
+                .ifEmpty { fmFallback }
             val linearCatnums = linearNames.flatMap { resolvePerName(it) }.toSet()
                 .ifEmpty { cleanStaleList(settingsRepo.getAmSatLinearCatnums()) }
+                .ifEmpty { linearFallback }
             settingsRepo.setAmSatCatnums(fmCatnums, linearCatnums)
             println("AMSAT live lists updated: FM=${fmCatnums.size}, Linear=${linearCatnums.size}, Active=${activeCatnums.size}")
         }.onFailure {

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

@@ -270,6 +270,35 @@ class DatabaseRepoTest {
         assertEquals(setOf(25544), settingsRepo.amSatFm)
     }
 
+    @Test
+    fun `amsat fm list falls back to local FM transceivers when page fails and no previous list`() =
+        runTest(dispatcher) {
+            // After clearing data, the previous FM list is empty AND the AMSAT
+            // page is down (timeout) -> the filter must fall back to local FM
+            // transceivers intersected with the whitelist, never stay empty.
+            val satnogsUrl = Sources.satelliteDataUrls.getValue("SatNOGS")
+            val localSource = FakeLocalSource().apply {
+                idsWithModes = listOf(25544, 26700, 39444) // local FM-transceiver sats
+            }
+            val remoteSource = FakeRemoteSource().apply {
+                networkStreams[satnogsUrl] = { issModulesCsvStream() }
+                // FM/Linear pages NOT registered -> 404 -> fetch fails.
+            }
+            val settingsRepo = FakeSettingsRepo(
+                dataSources = DataSourcesSettings(
+                    satelliteUrls = listOf(satnogsUrl),
+                    transceiversUrls = emptyList()
+                )
+            ).apply { amSatActive = setOf(25544) } // whitelist has only ZARYA
+            val repository = DatabaseRepo(dispatcher, dataParser, localSource, remoteSource, settingsRepo)
+
+            repository.updateFromRemote()
+
+            // Fallback = local FM ids ∩ whitelist = {25544}; ISS module aliases
+            // (26700) are excluded by the whitelist.
+            assertEquals(setOf(25544), settingsRepo.amSatFm)
+        }
+
     private fun amsatFmPageWithUnknownStream(): InputStream = """
         <table>
         <thead><tr><th>Satellite</th><th>Uplink</th><th>Downlink</th><th>Comment</th></tr></thead>
@@ -320,6 +349,7 @@ private class FakeRemoteSource : IRemoteSource {
 private class FakeLocalSource : ILocalSource {
     val insertedEntries = mutableListOf<OrbitalData>()
     private val insertedRadios = mutableListOf<SatRadio>()
+    var idsWithModes: List<Int> = emptyList()
 
     override suspend fun getEntriesTotal(): Int = insertedEntries.size
 
@@ -336,8 +366,8 @@ private class FakeLocalSource : ILocalSource {
         insertedEntries.clear()
     }
 
-    override suspend fun getIdsWithModes(modes: List<String>): List<Int> = emptyList()
-    override suspend fun getIdsWithModesAndUplink(modes: List<String>): List<Int> = emptyList()
+    override suspend fun getIdsWithModes(modes: List<String>): List<Int> = idsWithModes
+    override suspend fun getIdsWithModesAndUplink(modes: List<String>): List<Int> = idsWithModes
     override suspend fun getIdsWithModesAndAmateur(modes: List<String>): List<Int> = emptyList()
 
     override suspend fun getRadiosTotal(): Int = insertedRadios.size