fix: require pin when app resumes

app/src/main/java/to/bitkit/ui/Locals.kt

@@ -21,6 +21,9 @@ val LocalBalances = compositionLocalOf { BalanceState() }
 val LocalCurrencies = compositionLocalOf { CurrencyState() }
 val LocalIs24HourFormat = compositionLocalOf { false }
 
+/** True while the PIN screen covers the wallet; dialogs owning their own window must not render. */
+val LocalIsAppLocked = compositionLocalOf { false }
+
 // Statics
 val LocalDrawerState = staticCompositionLocalOf<DrawerState?> { null }
 val LocalBottomSheetOverlayState = staticCompositionLocalOf<BottomSheetOverlayState?> { null }

app/src/main/java/to/bitkit/ui/MainActivity.kt

@@ -9,15 +9,18 @@ import android.os.Looper
 import androidx.activity.compose.setContent
 import androidx.activity.viewModels
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.animation.fadeIn
+import androidx.compose.animation.EnterTransition
 import androidx.compose.animation.fadeOut
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalFocusManager
+import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.testTagsAsResourceId
 import androidx.core.content.IntentCompat
@@ -129,6 +132,9 @@ class MainActivity : FragmentActivity() {
                 val hazeState = rememberHazeState(blurEnabled = true)
                 val bottomSheetOverlayState = remember { BottomSheetOverlayState() }
                 val authSheetOverlayState = remember { BottomSheetOverlayState() }
+                val isAuthenticated by appViewModel.isAuthenticated.collectAsState()
+                val focusManager = LocalFocusManager.current
+                val keyboardController = LocalSoftwareKeyboardController.current
 
                 LaunchedEffect(
                     walletExists,
@@ -155,26 +161,32 @@ class MainActivity : FragmentActivity() {
                         walletViewModel = walletViewModel,
                     )
                 } else {
-                    val isAuthenticated by appViewModel.isAuthenticated.collectAsStateWithLifecycle()
-
                     IsOnlineTracker(appViewModel)
-                    ContentView(
-                        appViewModel = appViewModel,
-                        walletViewModel = walletViewModel,
-                        blocktankViewModel = blocktankViewModel,
-                        currencyViewModel = currencyViewModel,
-                        activityListViewModel = activityListViewModel,
-                        transferViewModel = transferViewModel,
-                        settingsViewModel = settingsViewModel,
-                        backupsViewModel = backupsViewModel,
-                        hazeState = hazeState,
-                        bottomSheetOverlayState = bottomSheetOverlayState,
-                        modifier = Modifier.hazeSource(hazeState, zIndex = 0f),
-                    )
+                    LaunchedEffect(isAuthenticated) {
+                        if (!isAuthenticated) {
+                            focusManager.clearFocus(force = true)
+                            keyboardController?.hide()
+                        }
+                    }
+                    CompositionLocalProvider(LocalIsAppLocked provides !isAuthenticated) {
+                        ContentView(
+                            appViewModel = appViewModel,
+                            walletViewModel = walletViewModel,
+                            blocktankViewModel = blocktankViewModel,
+                            currencyViewModel = currencyViewModel,
+                            activityListViewModel = activityListViewModel,
+                            transferViewModel = transferViewModel,
+                            settingsViewModel = settingsViewModel,
+                            backupsViewModel = backupsViewModel,
+                            hazeState = hazeState,
+                            bottomSheetOverlayState = bottomSheetOverlayState,
+                            modifier = Modifier.hazeSource(hazeState, zIndex = 0f),
+                        )
+                    }
 
                     AnimatedVisibility(
                         visible = !isAuthenticated,
-                        enter = fadeIn(),
+                        enter = EnterTransition.None,
                         exit = fadeOut(),
                     ) {
                         AuthCheckView(
@@ -208,7 +220,7 @@ class MainActivity : FragmentActivity() {
                 }
 
                 val transactionSheetDetails by appViewModel.transactionSheet.collectAsStateWithLifecycle()
-                if (transactionSheetDetails != NewTransactionSheetDetails.EMPTY) {
+                if (isAuthenticated && transactionSheetDetails != NewTransactionSheetDetails.EMPTY) {
                     NewTransactionSheet(
                         appViewModel = appViewModel,
                         bottomSheetOverlayState = bottomSheetOverlayState,
@@ -299,6 +311,11 @@ class MainActivity : FragmentActivity() {
         intent.launchKey()?.let { outState.putString(KEY_CONSUMED_LAUNCH_INTENT, it) }
     }
 
+    override fun onStop() {
+        super.onStop()
+        if (!isChangingConfigurations) appViewModel.lockOnBackground()
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         if (!settingsViewModel.notificationsGranted.value) {

app/src/main/java/to/bitkit/ui/scaffold/AppAlertDialog.kt

@@ -15,6 +15,7 @@ import androidx.compose.ui.semantics.testTagsAsResourceId
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.window.DialogProperties
 import to.bitkit.R
+import to.bitkit.ui.LocalIsAppLocked
 import to.bitkit.ui.components.BodyM
 import to.bitkit.ui.components.BodyMSB
 import to.bitkit.ui.components.Title
@@ -71,6 +72,7 @@ fun AppAlertDialog(
     ),
     textContent: @Composable () -> Unit,
 ) {
+    if (LocalIsAppLocked.current) return
     AlertDialog(
         onDismissRequest = onDismissRequest,
         confirmButton = {