fix: add debug logging for frame processing in event loop

bridge/src/lib.rs

@@ -344,12 +344,12 @@ pub extern "C" fn sdxr_start(app_id: *const std::os::raw::c_char) -> i32 {
                     }
                 }
                 if frames.is_empty() { return; }
+                eprintln!("[bridge/event_loop] Processing {} frames, state has {} nodes", frames.len(), state.nodes.len());
                 for frame in frames {
                     if let Ok(ctrl) = CTRL.lock() { if let Some(shared) = &ctrl.shared_state { if let Ok(ss) = shared.lock() { state.nodes = ss.nodes.clone(); } } }
                     state.on_frame(&frame);
                     projector.frame(&context, &frame, &mut state);
                 }
-                eprintln!("[bridge/event_loop] Processing {} frames, updating projector with {} nodes", frames.len(), state.nodes.len());
                 projector.update(&context, &mut state);
                 if STOP_REQUESTED.load(Ordering::SeqCst) { flow.stop(); }
             });