fix: resolve CI lint error and coroutines opt-in warnings

- Collect ConcordSession.state via collectAsStateWithLifecycle instead of
  reading StateFlow.value in composition (fixes StateFlowValueCalledInComposition
  lint error in GroupBottomBarEntries.kt).
- Add @OptIn(ExperimentalCoroutinesApi::class) for testScheduler.advanceTimeBy
  and runCurrent usages in ResourceUsageLedgerTest and RelayAuthPromptBusTest.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wx8SvzsWsru7rEQ1KcbSCW

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/bottombars/GroupBottomBarEntries.kt

@@ -46,6 +46,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.publicChannels.concor
 import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.RelayUrlNormalizer
 import com.vitorpamplona.quartz.nip29RelayGroups.GroupId
+import kotlinx.coroutines.flow.MutableStateFlow
 
 /**
  * The resolved presentation of a pinned chat/group [BottomBarEntry] — enough to render its avatar in
@@ -153,12 +154,8 @@ fun rememberConcordEntryDisplay(
     val communities by account.concordChannelList.liveCommunities.collectAsStateWithLifecycle()
 
     val session = remember(entry.communityId, revision) { account.concordSessions.sessionFor(entry.communityId) }
-    val metadata =
-        session
-            ?.state
-            ?.value
-            .takeIf { revision >= 0 }
-            ?.metadata
+    val state by (session?.state ?: remember { MutableStateFlow(null) }).collectAsStateWithLifecycle()
+    val metadata = state.takeIf { revision >= 0 }?.metadata
 
     val fallbackName = remember(communities, entry.communityId) { communities.firstOrNull { it.id == entry.communityId }?.name?.ifBlank { null } }
     val label = metadata?.name?.takeIf { it.isNotBlank() } ?: fallbackName ?: stringRes(R.string.concord_home_title)

amethyst/src/test/java/com/vitorpamplona/amethyst/service/relayClient/authCommand/model/RelayAuthPromptBusTest.kt

@@ -21,6 +21,7 @@
 package com.vitorpamplona.amethyst.service.relayClient.authCommand.model
 
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.async
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.test.runCurrent
@@ -70,6 +71,7 @@ class RelayAuthPromptBusTest {
             assertEquals(UserAuthChoice.DISMISS, bus.requestDecision(relay, emptyList()))
         }
 
+    @OptIn(ExperimentalCoroutinesApi::class)
     @Test
     fun retainsPromptForALateSubscriberSoItIsNotLost() =
         runTest {

amethyst/src/test/java/com/vitorpamplona/amethyst/service/resourceusage/ResourceUsageLedgerTest.kt

@@ -27,6 +27,7 @@ import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
 import com.vitorpamplona.quartz.nip57Zaps.LnZapPrivateEvent
 import com.vitorpamplona.quartz.nip57Zaps.LnZapRequestEvent
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.test.runTest
 import org.junit.Assert.assertEquals
@@ -142,6 +143,7 @@ class ResourceUsageAccountantTest {
             assertEquals(12L, store.allDays()[200]?.get("x"))
         }
 
+    @OptIn(ExperimentalCoroutinesApi::class)
     @Test
     fun hookAddsAreDrainedInPlaceAndNeverRearmTheFlushLoop() =
         runTest {