iris: move text state into shared resources

app/examples/phone.rs

@@ -56,7 +56,7 @@ impl DesktopAppState for Client {
         let screen = match ai_app::ui::fixture::open(rsc, &mut ui_state) {
             Ok(opened) => {
                 if let Some(message) = message_argv() {
-                    opened.screen.composer.field.edit(rsc).set(&message);
+                    (opened.screen.composer.field)(rsc).set(&message);
                 }
                 if let Some(text) = typed_argv() {
                     let field = opened.screen.composer.field;
@@ -66,8 +66,8 @@ impl DesktopAppState for Client {
                             ctx.update(move |state: &mut Client, rsc| {
                                 state.set_focus(Some(field));
                                 let end = rsc[field].text().len();
-                                let mut edit = field.edit(rsc);
-                                if edit.text.caret().is_none() {
+                                let edit = field(rsc);
+                                if edit.caret().is_none() {
                                     edit.set_cursor_byte(end);
                                 }
                                 edit.insert(&ch.to_string());