fixed onboarding screen issues (#657)

ui-lib/src/main/java/co/electriccoin/zcash/ui/screen/onboarding/view/OnboardingView.kt

@@ -19,6 +19,7 @@ import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
@@ -29,6 +30,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.scale
 import androidx.compose.ui.graphics.painter.Painter
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.res.painterResource
@@ -173,7 +175,7 @@ private fun BottomNav(
     onCreateWallet: () -> Unit,
     onImportWallet: () -> Unit
 ) {
-    Column {
+    Column(Modifier.background(MaterialTheme.colorScheme.surface)) {
         if (currentStage == OnboardingStage.Wallet) {
             WalletStageBottomNav(onCreateWallet = onCreateWallet, onImportWallet)
         } else {
@@ -262,23 +264,30 @@ private fun Wallet(paddingValues: PaddingValues) {
     }
 }
 
+@Suppress("LongParameterList")
 @Composable
 private fun Content(
     image: Painter,
     imageContentDescription: String?,
     headline: String,
     body: String,
-    paddingValues: PaddingValues
+    paddingValues: PaddingValues,
+    imageScale: Float = 0.8f
 ) {
     val scrollState = rememberScrollState()
     Column(
         Modifier
             .fillMaxWidth()
-            .padding(ZcashTheme.paddings.padding)
             .verticalScroll(scrollState)
     ) {
-        Column(Modifier.padding(bottom = paddingValues.calculateBottomPadding())) {
-            Image(image, imageContentDescription)
+        Column(
+            Modifier.padding(
+                start = ZcashTheme.paddings.padding,
+                end = ZcashTheme.paddings.padding,
+                bottom = paddingValues.calculateBottomPadding()
+            )
+        ) {
+            Image(modifier = Modifier.scale(imageScale), painter = image, contentDescription = imageContentDescription)
             Header(headline)
             Body(body)
         }