feat: theme dashboard charts and expose admin UI on HF Spaces

feat: track local-path usage and enrich analytics dashboard

feat: add usage tracking with live throughput rates and analytics dashboard

feat: surface saved endpoint models and revamp the admin UI

fix: cache-bust admin UI and show the running version

fix: make model combobox editable and searchable in Model Routing

feat: fetch models from OpenAI-compatible endpoints in admin UI

feat: numbered OpenAI-compatible endpoints admin page

feat: admin dedicated pages, pool key management, keypool quotas (#1350)