fix: darkmode switching

Author: marklawlor

example/app.config.json

@@ -1,11 +1,14 @@
 {
   "name": "example",
   "plugins": ["expo-dev-client"],
-  "android": {
-    "package": "com.css.example"
-  },
-  "ios": {
-    "bundleIdentifier": "com.css.example",
-    "buildFromSource": false
+  "expo": {
+    "userInterfaceStyle": "automatic",
+    "android": {
+      "package": "dev.reactnativecss"
+    },
+    "ios": {
+      "bundleIdentifier": "dev.reactnativecss",
+      "buildFromSource": false
+    }
   }
 }

src/runtime/native/reactivity.ts

@@ -233,11 +233,7 @@ export const vh = observable<number>(
 export const colorScheme = observable<ColorSchemeName>(
   Appearance.getColorScheme(),
 );
-colorScheme.set(Appearance.getColorScheme());
-colorScheme.get({
-  observers: new Set(),
-  run: () => Appearance.setColorScheme(colorScheme.get()),
-});
+Appearance.addChangeListener((event) => colorScheme.set(event.colorScheme));
 
 /** Containers ****************************************************************/