cleanup desktop and mobile assets and icons

This fixes quirks for different platforms

js/mobile/app.config.ts

@@ -14,7 +14,7 @@ const config: ExpoConfig = {
   splash: {
     image: "./assets/icon.png",
     resizeMode: "contain",
-    backgroundColor: "#000000",
+    backgroundColor: "#2B2B2B",
   },
   ios: {
     supportsTablet: true,
@@ -23,6 +23,12 @@ const config: ExpoConfig = {
       ITSAppUsesNonExemptEncryption: false,
     },
   },
+  android: {
+    adaptiveIcon: {
+      foregroundImage: "./assets/icon.png",
+      backgroundColor: "#2B2B2B",
+    },
+  },
   plugins: [
     [
       "expo-build-properties",
@@ -53,7 +59,7 @@ const config: ExpoConfig = {
     [
       "expo-notifications",
       {
-        icon: "./assets/icon.png",
+        icon: "./assets/notification-icon.png",
         color: "#000000",
       },
     ],