Stop rotation from reloading the WebView (closes #14)

[jim-daf]

Stop rotation from reloading the WebView

Closes #14

What changed

wrapper/src/main/AndroidManifest.xml

Add the orientation, screen size, and related configuration changes to the existing android:configChanges attribute on MainActivity. With these in place, Android no longer destroys and recreates the activity when the device rotates, so the hosted WebView keeps its document, its JavaScript state, and any signed-in user.

Key snippet

<activity
    android:name=".MainActivity"
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode"
    android:exported="true"
    android:theme="@style/Theme.Wwwallet">

Why these flags

• orientation and screenSize are the pair Android requires to suppress activity recreation on rotation since API 13.
• screenLayout and smallestScreenSize cover foldables and split-screen transitions.
• uiMode covers system theme switches (day, night, car), which would otherwise also reset the WebView.

[Copilot]

Pull request overview

This PR updates the Android MainActivity manifest configuration to prevent activity recreation on device rotation (and related configuration changes), ensuring the embedded WebView keeps its document/JS/session state as reported in #14.

Changes:

• Expand android:configChanges on MainActivity to include orientation and screen/UX-related configuration flags.

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