* Rename WebSocket message types for better organization
* Improve state handling with dedicated methods like broadcast_state
* Restructure frontend components and remove unused code
- Added `bidding_duration` field to `DraftSessionSettings` model and migration.
- Updated `DraftStateManager` to manage bidding start/end times using session settings.
- Extended WebSocket payloads to include bidding timer data.
- Added `DraftCountdownClock` React component and integrated into admin and participant UIs.
- Created new `DraftDebug` view, template, and front-end component for real-time state debugging.
- Updated utility functions to handle new timer fields in draft state.
- Changed script tags in templates to load with `defer` for non-blocking execution.
- Added user authentication UI in the base template for navbar.
- Expanded `league.dj.html` to include a new "Draft Sessions" tab showing active drafts.
- Refactored Django views and models to support `DraftSession` with participants and movies.
- Replaced deprecated models like `DraftParticipant` and `DraftMoviePool` with a new schema using `DraftSessionParticipant`.
- Introduced WebSocket consumers (`DraftAdminConsumer`, `DraftParticipantConsumer`) with structured phase logic and caching.
- Added `DraftStateManager` for managing draft state in Django cache.
- Created frontend UI components in React for draft admin and participants, including phase control and WebSocket message logging.
- Updated SCSS styles for improved UI structure and messaging area.
