From 46672dfed8a3c7b784bf561b0d8a62009b388946 Mon Sep 17 00:00:00 2001
From: Alex Hart <alex@signal.org>
Date: Fri, 14 Nov 2025 09:48:04 -0400
Subject: [PATCH] Remember and restore last pane selection.

---
 .../java/org/thoughtcrime/securesms/MainActivity.kt   | 11 +++++++++--
 .../securesms/keyvalue/MiscellaneousValues.kt         |  3 +++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt b/app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt
index ae06517629..7088a44c76 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt
@@ -376,14 +376,21 @@ class MainActivity : PassphraseRequiredActivity(), VoiceNoteMediaControllerOwner
 
         val (detailOnlyAnchor, detailAndListAnchor, listOnlyAnchor) = anchors
 
+        val initialAnchorIndex = remember {
+          val index = SignalStore.misc.preferredMainActivityAnchorIndex
+          if (index >= 0) index else 1
+        }
+
         val paneExpansionState = rememberPaneExpansionState(
           key = wrappedNavigator.scaffoldValue.paneExpansionStateKey,
           anchors = anchors,
-          initialAnchoredIndex = 1
+          initialAnchoredIndex = initialAnchorIndex
         )
 
         val paneAnchorIndex = rememberSaveable(paneExpansionState.currentAnchor) {
-          anchors.indexOf(paneExpansionState.currentAnchor)
+          val index = anchors.indexOf(paneExpansionState.currentAnchor)
+          SignalStore.misc.preferredMainActivityAnchorIndex = index
+          index
         }
 
         LaunchedEffect(windowSizeClass) {
diff --git a/app/src/main/java/org/thoughtcrime/securesms/keyvalue/MiscellaneousValues.kt b/app/src/main/java/org/thoughtcrime/securesms/keyvalue/MiscellaneousValues.kt
index 02706ca9f2..77d6fc24cc 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/keyvalue/MiscellaneousValues.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/keyvalue/MiscellaneousValues.kt
@@ -42,6 +42,7 @@ class MiscellaneousValues internal constructor(store: KeyValueStore) : SignalSto
     private const val NEW_LINKED_DEVICE_ID = "misc.new_linked_device_id"
     private const val NEW_LINKED_DEVICE_CREATED_TIME = "misc.new_linked_device_created_time"
     private const val STARTED_QUOTE_THUMBNAIL_MIGRATION = "misc.started_quote_thumbnail_migration"
+    private const val PREFERRED_MAIN_ACTIVITY_ANCHOR_INDEX = "misc.preferred_main_activity_anchor_index"
   }
 
   public override fun onFirstEverAppLaunch() {
@@ -95,6 +96,8 @@ class MiscellaneousValues internal constructor(store: KeyValueStore) : SignalSto
 
   val isChangeNumberLocked: Boolean by booleanValue(CHANGE_NUMBER_LOCK, false)
 
+  var preferredMainActivityAnchorIndex: Int by integerValue(PREFERRED_MAIN_ACTIVITY_ANCHOR_INDEX, -1)
+
   fun lockChangeNumber() {
     putBoolean(CHANGE_NUMBER_LOCK, true)
     ChangeNumberConstraintObserver.onChange()