update logos on SimpleX info page for dark mode (#880)

apps/android/app/src/main/java/chat/simplex/app/views/onboarding/SimpleXInfo.kt

@@ -3,6 +3,7 @@ package chat.simplex.app.views.onboarding
 import android.content.res.Configuration
 import androidx.annotation.StringRes
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.*
 import androidx.compose.material.*
 import androidx.compose.material.icons.Icons
@@ -76,7 +77,7 @@ fun SimpleXInfoLayout(
 @Composable
 fun SimpleXLogo() {
   Image(
-    painter = painterResource(R.drawable.logo),
+    painter = painterResource(if (isSystemInDarkTheme()) R.drawable.logo_light else R.drawable.logo),
     contentDescription = stringResource(R.string.image_descr_simplex_logo),
     modifier = Modifier
       .padding(vertical = 20.dp)

apps/ios/Shared/Assets.xcassets/logo-light.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "logo-light.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "logo-light@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "logo-light@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

apps/ios/Shared/Views/Onboarding/SimpleXInfo.swift

@@ -10,13 +10,14 @@ import SwiftUI
 
 struct SimpleXInfo: View {
     @EnvironmentObject var m: ChatModel
+    @Environment(\.colorScheme) var colorScheme: ColorScheme
     @State private var showHowItWorks = false
     var onboarding: Bool
 
     var body: some View {
         GeometryReader { g in
             VStack(alignment: .leading) {
-                Image("logo")
+                Image(colorScheme == .light ? "logo" : "logo-light")
                     .resizable()
                     .aspectRatio(contentMode: .fit)
                     .frame(width: g.size.width * 0.7)