fix: display uploaded avatars across profile and dashboards

feat: add talk feedback and public rating flow

feat: add role management, CFP, media, and privacy updates

feat: add speaker preparation checklist

chore: remove backend notes

feat: enforce role access and profile names

fix: sync frontend with backend contract

ci: update nginx conf

chore: polish speaker copy

feat: unify talk cards

feat: add ai video upload page

feat: switch dashboards to backend reports

fix: sync contract and polish mobile layouts

feat: switch frontend integration to backend api

fix: refine dashboard filter layout

fix: improve mobile dashboard layouts

feat: add public speaker portfolio page

docs: describe dashboard report calculations

feat: align dashboard filters and roles contract

feat: add two enums to openapi.yaml and change type of nps from integer to number

feat: expand openapi schema for dashboards

feat: add openapi scheme

fix: refine login page copy

fix: polish user-facing copy across pages

fix: align privacy policy with actual data processing

feat: add devrel and speaker dashboards

feat: improve privacy page and metadata

feat: align frontend with talks and lectures api

feat: add speaker and conference pages

docs: add repository guidelines

feat: add LICENSE file