Handle the back button on AboutScreen and LibrariesScreen

app/src/main/java/org/mydomain/myscan/view/AboutScreen.kt

@@ -14,6 +14,7 @@
  */
 package org.mydomain.myscan.view
 
+import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -60,6 +61,7 @@ import org.mydomain.myscan.ui.theme.MyScanTheme
 fun AboutScreen(onBack: () -> Unit, onViewLibraries: () -> Unit) {
     val showLicenseDialog = rememberSaveable { mutableStateOf(false) }
     val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    BackHandler { onBack() }
     Scaffold(
         topBar = {
             TopAppBar(

app/src/main/java/org/mydomain/myscan/view/DocumentScreen.kt

@@ -87,9 +87,7 @@ fun DocumentScreen(
         navigation.toCameraScreen()
         return
     }
-    BackHandler {
-        navigation.back()
-    }
+    BackHandler { navigation.back() }
 
     MyScaffold(
         toAboutScreen = navigation.toAboutScreen,

app/src/main/java/org/mydomain/myscan/view/LibrariesScreen.kt

@@ -14,6 +14,7 @@
  */
 package org.mydomain.myscan.view
 
+import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -34,6 +35,7 @@ import org.mydomain.myscan.R
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun LibrariesScreen(onBack: () -> Unit) {
+    BackHandler { onBack() }
     Scaffold(
         topBar = {
             TopAppBar(