traj_ext: fix 1.1GB response — lazy-load formatted_prompt, truncate tool results in list

traj_ext: add 'direct' badge when n_tool_calls == 0

fix: use correct index.html from fresh build (was stale from rebase conflict)

traj_ext: add run selector, run_name badge, prompt-on-top in both view; load bcp-full-runs-v1

Show selected step indices in header

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

Add Traj Ext viewer tab with trajectory block rendering and HF dataset

Deploy research dashboard