Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

amethyst/src/main/java/com/vitorpamplona/amethyst/AppModules.kt

@@ -117,6 +117,12 @@ class AppModules(
         OtsSharedPreferences(appContext, applicationIOScope)
     }
 
+    init {
+        applicationIOScope.launch {
+            // Eagerly initialize OtsSharedPreferences off the main thread
+            otsPrefs
+        }
+    }
     // App services that should be run as soon as there are subscribers to their flows
     val locationManager = LocationState(appContext, applicationIOScope)
     val connManager = ConnectivityManager(appContext, applicationIOScope)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/settings/OtsSettingsSection.kt

@@ -234,7 +234,7 @@ private fun CustomExplorerInput(
     onSave: (String?) -> Unit,
 ) {
     var input by rememberSaveable(currentUrl) { mutableStateOf(currentUrl ?: "") }
-    var validationError by remember { mutableStateOf<String?>(null) }
+    var validationError by remember(currentUrl) { mutableStateOf<String?>(null) }
     val kb = LocalSoftwareKeyboardController.current
 
     fun trySave() {