Integrate draft session support with phase handling and real-time updates

- 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.

frontend/src/apps/draft/constants.js

@@ -0,0 +1,39 @@
+export const DraftMessage = {
+  // Server to Client
+  INFORM: {
+    PHASE_CHANGE: "inform.phase.change",
+    STATUS: "inform.status",
+    JOIN_USER: "inform.join.user",
+  },
+
+  // Client to Server
+  REQUEST: {
+    PHASE_CHANGE: "request.phase.change",
+    INFORM_STATUS: "request.inform.status",
+    JOIN_PARTICIPANT: "request.join.participant",
+    JOIN_ADMIN: "request.join.admin",
+    DETERMINE_DRAFT_ORDER: "request.determine.draft_order",
+  },
+
+  // Confirmation messages (Server to Client)
+  CONFIRM: {
+    PHASE_CHANGE: "confirm.phase.change",
+    JOIN_PARTICIPANT: "confirm.join.participant",
+    JOIN_ADMIN: "confirm.join.admin",
+    DETERMINE_DRAFT_ORDER: "confirm.determine.draft_order",
+  },
+
+  // Client-side notification (to server)
+  NOTIFY: {
+    JOIN_USER: "notify.join.user",
+  },
+};
+
+export const DraftPhase = {
+  WAITING: 0,
+  DETERMINE_ORDER: 10,
+  NOMINATION: 20,
+  BIDDING: 30,
+  AWARD: 40,
+  FINALIZE: 50,
+}