Fix compose previews

composeApp/src/androidMain/kotlin/org/ooni/probe/ui/shared/CalculateWindowSizeClass.android.kt

@@ -1,10 +1,15 @@
 package org.ooni.probe.ui.shared
 
-import android.app.Activity
 import androidx.activity.compose.LocalActivity
 import androidx.compose.material3.windowsizeclass.WindowSizeClass
 import androidx.compose.material3.windowsizeclass.calculateWindowSizeClass
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
 
 @Composable
-actual fun calculateWindowSizeClass(): WindowSizeClass = calculateWindowSizeClass(LocalActivity.current as Activity)
+actual fun calculateWindowSizeClass(): WindowSizeClass =
+    LocalActivity.current
+        ?.let { calculateWindowSizeClass(it) }
+        // Generic default size
+        ?: WindowSizeClass.calculateFromSize(DpSize(360.dp, 800.dp))

composeApp/src/commonMain/kotlin/org/ooni/probe/ui/choosewebsites/ChooseWebsitesScreen.kt

@@ -50,7 +50,9 @@ import ooniprobe.composeapp.generated.resources.ic_timer
 import org.jetbrains.compose.resources.painterResource
 import org.jetbrains.compose.resources.pluralStringResource
 import org.jetbrains.compose.resources.stringResource
+import org.jetbrains.compose.ui.tooling.preview.Preview
 import org.ooni.probe.ui.shared.TopBar
+import org.ooni.probe.ui.theme.AppTheme
 
 @Composable
 fun ChooseWebsitesScreen(
@@ -205,3 +207,14 @@ private fun BackConfirmationDialog(
         },
     )
 }
+
+@Preview
+@Composable
+fun ChooseWebsitesScreenPreview() {
+    AppTheme {
+        ChooseWebsitesScreen(
+            state = ChooseWebsitesViewModel.State(),
+            onEvent = {},
+        )
+    }
+}

composeApp/src/commonMain/kotlin/org/ooni/probe/ui/dashboard/DashboardScreen.kt

@@ -195,3 +195,11 @@ fun DashboardScreenPreview() {
         )
     }
 }
+
+@Preview
+@Composable
+fun VpnWarningPreview() {
+    AppTheme {
+        VpnWarning()
+    }
+}

composeApp/src/commonMain/kotlin/org/ooni/probe/ui/dashboard/RunBackgroundStateSection.kt

@@ -33,10 +33,12 @@ import ooniprobe.composeapp.generated.resources.Results_UploadingMissing
 import ooniprobe.composeapp.generated.resources.ic_timer
 import org.jetbrains.compose.resources.painterResource
 import org.jetbrains.compose.resources.stringResource
+import org.jetbrains.compose.ui.tooling.preview.Preview
 import org.ooni.probe.data.models.RunBackgroundState
 import org.ooni.probe.domain.UploadMissingMeasurements
 import org.ooni.probe.ui.shared.relativeDateTime
 import org.ooni.probe.ui.shared.shortFormat
+import org.ooni.probe.ui.theme.AppTheme
 import org.ooni.probe.ui.theme.customColors
 
 @Composable
@@ -230,3 +232,49 @@ private fun RunningTests(
         }
     }
 }
+
+@Preview
+@Composable
+fun RunBackgroundIdlePreview() {
+    AppTheme {
+        Idle(
+            state = RunBackgroundState.Idle(),
+            onEvent = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+fun RunBackgroundUploadingMissingResultsPreview() {
+    AppTheme {
+        UploadingMissingResults(
+            state = RunBackgroundState.UploadingMissingResults(
+                UploadMissingMeasurements.State.Uploading(
+                    uploaded = 2,
+                    failedToUpload = 1,
+                    total = 10,
+                ),
+            ),
+        )
+    }
+}
+
+@Preview
+@Composable
+fun RunBackgroundRunningTestsPreview() {
+    AppTheme {
+        RunningTests(
+            state = RunBackgroundState.RunningTests(),
+            onEvent = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+fun RunBackgroundStoppingPreview() {
+    AppTheme {
+        Stopping()
+    }
+}