fix up export

- action now also available when only validation done (as it should be)
- exporting of plane gaze not available if there are no trials, even if action was successful (e.g. for validation plane)

Author: dcnieho

src/gazeMapper/GUI/_impl/callbacks.py

@@ -336,7 +336,7 @@ def show_export_config(g, path: str|pathlib.Path, sessions: list[str]):
         if s is None:
             continue
         if 'plane gaze' not in to_export:
-            if any((s.recordings[r].state[process.Action.GAZE_TO_PLANE]==process.State.Completed for r in s.recordings)):
+            if annotation.Event.Trial in g.study_config.planes_per_episode and any((s.recordings[r].state[process.Action.GAZE_TO_PLANE]==process.State.Completed for r in s.recordings)):
                 to_export['plane gaze'] = True
         if recs:=[s.recordings[r].info.working_directory for r in s.recordings if s.recordings[r].state[process.Action.RUN_VALIDATION]==process.State.Completed]:
             to_export['validation'] = True

src/gazeMapper/process/__init__.py

@@ -123,7 +123,7 @@ def is_action_possible_given_config(action: Action, study_config: 'config.Study'
         case Action.RUN_VALIDATION:
             return annotation.Event.Validate in study_config.planes_per_episode
         case Action.EXPORT_TRIALS:
-            return annotation.Event.Trial in study_config.planes_per_episode
+            return annotation.Event.Trial in study_config.planes_per_episode or annotation.Event.Validate in study_config.planes_per_episode
         case Action.MAKE_MAPPED_GAZE_VIDEO:
             return not not study_config.video_make_which