docs: update SESSION_CONTEXT for Phase 1.6 heats system backend

docs/SESSION_CONTEXT.md

@@ -15,9 +15,10 @@
 
 ## Current Status
 
-**Phase:** 1.5 (Email Verification & WSDC Integration + User Profiles + Security) - ✅ COMPLETED
-**Progress:** ~65%
-**Next Goal:** Phase 2 - Core Features (Matches API, Ratings, WebRTC signaling)
+**Phase:** 1.6 (Competition Heats System) - ⏳ IN PROGRESS (Backend ✅ Complete, Frontend ⏳ Pending)
+**Previous Phase:** 1.5 (Email & WSDC & Profiles & Security & QR Check-in) - ✅ COMPLETED
+**Progress:** ~70%
+**Next Goal:** Complete Phase 1.6 Frontend, then Phase 2 - Core Features (Matches API, Ratings, WebRTC signaling)
 
 ### What Works Now
 - ✅ Docker Compose (nginx:8080 + frontend + backend + PostgreSQL)
@@ -130,9 +131,11 @@
 - `backend/src/controllers/auth.js` - Register, login, email verification, password reset
 - `backend/src/controllers/user.js` - **UPDATED: Profile updates (social, location) - Phase 1.5**
 - `backend/src/controllers/wsdc.js` - WSDC API proxy for dancer lookup
-- `backend/src/routes/events.js` - **UPDATED: QR check-in endpoints (checkin, details, leave), participant verification - Phase 1.5**
+- `backend/src/routes/events.js` - **UPDATED: Heats management endpoints (POST/GET/DELETE /heats) - Phase 1.6**
+- `backend/src/routes/divisions.js` - **NEW: List all divisions - Phase 1.6**
+- `backend/src/routes/competitionTypes.js` - **NEW: List all competition types - Phase 1.6**
 - `backend/src/routes/users.js` - **UPDATED: Public profile endpoint - Phase 1.5**
-- `backend/src/socket/index.js` - **UPDATED: Participant verification before room join, security fix - Phase 1.5**
+- `backend/src/socket/index.js` - **UPDATED: heats_updated broadcast event, getIO export - Phase 1.6**
 - `backend/src/utils/email.js` - AWS SES email service with HTML templates
 - `backend/src/utils/auth.js` - Token generation utilities
 - `backend/src/middleware/auth.js` - Email verification middleware
@@ -152,7 +155,7 @@
 
 ## Database Schema (Implemented - Prisma)
 
-8 tables with relations:
+11 tables with relations:
 - `users` - **EXTENDED in Phase 1.5:**
   - Base: id, username, email, password_hash, avatar, created_at, updated_at
   - **WSDC:** first_name, last_name, wsdc_id
@@ -163,6 +166,9 @@
 - `events` - id, **slug (unique)**, name, location, start_date, end_date, description, worldsdc_id, participants_count
 - `event_participants` - **NEW in Phase 1.5:** id, user_id, event_id, joined_at (many-to-many)
 - `event_checkin_tokens` - **NEW in Phase 1.5:** id, event_id (unique), token (cuid, unique), created_at
+- `divisions` - **NEW in Phase 1.6:** id, name, abbreviation, display_order (Newcomer, Novice, Intermediate, Advanced, All-Star, Champion)
+- `competition_types` - **NEW in Phase 1.6:** id, name, abbreviation (Jack & Jill, Strictly)
+- `event_user_heats` - **NEW in Phase 1.6:** id, user_id, event_id, division_id, competition_type_id, heat_number (1-9), role (Leader/Follower/NULL)
 - `chat_rooms` - id, event_id, match_id, type (event/private), created_at
 - `messages` - id, room_id, user_id, content, type, created_at
 - `matches` - id, user1_id, user2_id, event_id, room_id, status, created_at
@@ -173,8 +179,9 @@
 - `20251113151534_add_wsdc_and_email_verification` - Phase 1.5 (email, WSDC, social, location)
 - `20251113202500_add_event_slug` - **Phase 1.5 (event security - unique slugs)**
 - `20251114125544_add_event_checkin_tokens` - **Phase 1.5 (QR code check-in system)**
+- `20251114142504_add_competition_heats_system` - **Phase 1.6 (competition heats for matchmaking)**
 
-**Seed data:** 3 events, 2 users, event chat rooms
+**Seed data:** 4 events, 6 divisions, 2 competition types, event chat rooms
 
 ---
 
@@ -373,4 +380,9 @@ RUN apk add --no-cache openssl
   - Event participation tracking
   - Event security (unique slugs, no ID enumeration)
   - **QR code event check-in system** (physical presence required, dev mode bypass)
+**Phase 1.6 Status:** ⏳ IN PROGRESS - Competition Heats System
+  - ✅ Backend Complete: 3 new tables (divisions, competition_types, event_user_heats)
+  - ✅ API endpoints (GET /divisions, GET /competition-types, heats CRUD)
+  - ✅ Socket.IO heats_updated broadcast
+  - ⏳ Frontend Pending: HeatsBanner component, EventChatPage updates, badges, filtering
 **Next Phase:** Phase 2 - Core Features (Matches API + Ratings + WebRTC)