Expose draft updates to iOS bridge

crates/tele-ios-ffi/src/lib.rs

@@ -1303,6 +1303,13 @@ mod tests {
         assert_eq!(pinned[0].text, "Hello from fake TDLib");
         assert_eq!(session.download_photo(100).unwrap().path, "/tmp/fake-photo.jpg");
         assert_eq!(session.download_voice(200).unwrap().path, "/tmp/fake-voice.ogg");
+        session
+            .set_draft(chats[0].id, "Draft from Rust test".to_string())
+            .unwrap();
+        assert!(session.poll_events().iter().any(|event| matches!(
+            event,
+            IosEvent::DraftChanged { draft } if draft.text == "Draft from Rust test"
+        )));
 
         let sent = session
             .send_message(chats[0].id, "Hi from Swift".to_string(), None)