Add retained paints and shared text selection

app-rust/examples/phone.rs

@@ -88,7 +88,7 @@ impl DefaultAppState for Client {
             }
             Err(message) => {
                 let text = wtext(format!("Couldn't fold the bench fixture: {message}"))
-                    .color(Color::WHITE)
+                    .color(PaintId::WHITE)
                     .wrap(true)
                     .pad(dp(16))
                     .add_strong(rsc)