Update header branding and remove tools footer

fix: stabilize benchmark leaders, model benchmark sorting, and HF bucket reads

feat: refine leaderboard metrics, metadata, and visualizations

chore: update agent workflow and Tailwind checks

fix: correct details matrix sticky layering and hover states

feat: refine leaderboard visualizations and CSV exports

feat: refine leaderboard metric presentation and bucket data handling

feat: integrate bucket-backed leaderboard data

feat: add HiveTrace leaderboard frontend