android: clear message selection when context sheet is dismissed

android/CHANGELOG.md

@@ -1004,3 +1004,8 @@
 - Fix applied:
   - introduced dedicated app theme `Theme.Messenger` with parent `Theme.AppCompat.DayNight.NoActionBar`,
   - switched `AndroidManifest.xml` application theme to `@style/Theme.Messenger`.
+
+### Step 136 - Message context menu dismiss selection fix
+- Fixed chat bug after closing message context menu by tapping outside:
+  - selection state now clears on `ModalBottomSheet` dismiss,
+  - prevents stale single-selection action bar from appearing after menu close.

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt

@@ -745,7 +745,10 @@ fun ChatScreen(
             val selected = actionMenuMessage
             if (selected != null) {
                 ModalBottomSheet(
-                    onDismissRequest = { actionMenuMessage = null },
+                    onDismissRequest = {
+                        actionMenuMessage = null
+                        onClearSelection()
+                    },
                     sheetState = actionSheetState,
                 ) {
                     Column(