Set initial anchor index.

app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt

@@ -366,7 +366,8 @@ class MainActivity : PassphraseRequiredActivity(), VoiceNoteMediaControllerOwner
         val listOnlyAnchor = PaneExpansionAnchor.Offset.fromEnd(contentLayoutData.detailPaddingEnd)
 
         val paneExpansionState = rememberPaneExpansionState(
-          anchors = listOf(detailOnlyAnchor, detailAndListAnchor, listOnlyAnchor)
+          anchors = listOf(detailOnlyAnchor, detailAndListAnchor, listOnlyAnchor),
+          initialAnchoredIndex = 1
         )
 
         val chatNavGraphState = ChatNavGraphState.remember(windowSizeClass)
@@ -429,12 +430,6 @@ class MainActivity : PassphraseRequiredActivity(), VoiceNoteMediaControllerOwner
           }
         }
 
-        LaunchedEffect(paneExpansionState.currentAnchor, detailAndListAnchor) {
-          if (paneExpansionState.currentAnchor == null) {
-            paneExpansionState.animateTo(detailAndListAnchor)
-          }
-        }
-
         LaunchedEffect(paneExpansionState.currentAnchor, detailOnlyAnchor, listOnlyAnchor, detailAndListAnchor) {
           val isFullScreenPane = when (paneExpansionState.currentAnchor) {
             listOnlyAnchor, detailOnlyAnchor -> {

app/src/main/java/org/thoughtcrime/securesms/main/MainActivityComponents.kt

@@ -25,7 +25,6 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.LocalViewModelStoreOwner