v0.2.15

Fixed

• The phone no longer opens on a black screen: the web shell paints its first frame in the phone's light or dark color, and the Android app's WebView background follows the phone's mode instead of a fixed dark value.
• Reopening the app after Android killed its process shows the page again: it loads the saved relay address instead of restoring a blank WebView state, keeps the sign-in cookie on disk, and reloads the page on a pull from the top.