Derive new_status from new_trajectory; fix sidebar check mark; fix question for incomplete

Remove debug traceback from reload error; add fix_readme_features script

Add traceback to reload error response for debugging

Fix reload: delete cached dataset dir before reloading

Fix reload endpoint to force-redownload when schema changed

Add question, correct answer, and accuracy to Selected Tools tab

Fix selected_indices parsing for new datasets (stored as JSON string)

Relabel selected tools variants; remove traj_summary_ext; rename gemini/less-chars

Add 11 test300 Selected Tools variants extracted from trajectory_summary tag

Add traj_summary_orig_ext variant to Selected Tools tab with variant switcher

Add Selected Tools tab with side-by-side excerpt/trajectory viewer