feat: Add dark mode toggle and update UI components with theme-aware styling.

feat: transition to google-only authentication and streamline UI

feat: Introduce a product request system allowing viewers to submit requests and creators to manage them via a new dashboard page.

feat: Add user navigation with dropdown menu and avatar components, and update related features and dependencies.

feat: Enable users to claim demo videos from the showcase page during sign-up.

Deployment fix for HF