Add researcher join analysis to eval detail

Add DuckDB shadow-read backend with source-metadata fix

Separate policy and researcher views

Add interpretive signals, corpus dashboard, and slice browser

improve ux

Improve eval/model UX, lite data paths, and leaderboard clarity

Add per-benchmark comparison histograms on model detail

Refresh eval cards UI and backend data flow

Fix survey submit: use correct HF commit API JSON format with files array

Fix survey submit: use multipart form data for HF commit API

Fix HF commit API field: summary not commit_message

Fix survey submission: use HF commit API instead of deprecated upload

Add survey submission and update survey text for public use

fix bugs

feat: refine model and benchmark exploration

redesigned