Always send webcam frames regardless of tracking state

Move webcam send block above the `if not START: continue` gate
so the operator always has a live camera feed, even when arm
tracking is paused. Non-webcam image sources remain gated on
tracking state.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

teleop/teleop_hand_and_arm.py

@@ -534,27 +534,28 @@ if __name__ == '__main__':
                                f"Robot L={robot_ref_left[:3,3]}, R={robot_ref_right[:3,3]}")
             prev_start = START
 
+            # Webcam: always send regardless of tracking state
+            if webcam_cap is not None:
+                if current_time - webcam_last_send >= webcam_send_interval:
+                    ret, webcam_frame = webcam_cap.read()
+                    if ret:
+                        head_img = webcam_frame
+                        tv_wrapper.render_to_xr(webcam_frame)
+                        webcam_last_send = current_time
+
             # Skip arm tracking while paused (buttons + reset still work)
             if not START:
                 i_error_left = np.zeros(3)
                 i_error_right = np.zeros(3)
                 i_rot_error_left = np.zeros(3)
                 i_rot_error_right = np.zeros(3)
-                current_time = time.time()
                 time_elapsed = current_time - start_time
                 sleep_time = max(0, (1 / args.frequency) - time_elapsed)
                 time.sleep(sleep_time)
                 continue
 
-            # get image (webcam: non-blocking, rate-limited to save bandwidth)
-            if webcam_cap is not None:
-                if current_time - webcam_last_send >= webcam_send_interval:
-                    ret, webcam_frame = webcam_cap.read()
-                    if ret:
-                        head_img = webcam_frame
-                        tv_wrapper.render_to_xr(webcam_frame)
-                        webcam_last_send = current_time
-            else:
+            # get image (non-webcam sources, only during tracking)
+            if webcam_cap is None:
                 if camera_config['head_camera']['enable_zmq']:
                     if args.record or xr_need_local_img:
                         head_img = img_client.get_head_frame()