feat: Rebuild as Court Manager Dashboard v2

- Complete rewrite for single Court Manager user
- Feature 1: Player Management (CRUD, ELO, skill level)
- Feature 2: Court Reservation (timeline, override)
- Feature 3: Match Event Builder (3-step wizard)
  - Step 1: Event setup with player selection + stage calculator
  - Step 2: Stage configurator (Open/Skill/RR/Tournament)
  - Step 3: Auto bracket generation
- Feature 4: Live Court View (main dashboard, 2x2 grid)
- Event Control: score entry, bracket advancement, court assignment
- Screen view: TV display per court (/screen/:id)
- Seed: 8 players, 4 courts, 1 completed + 1 active event
- Routes: / players courts events events/new events/:id screen/:id

backend/requirements.txt

@@ -1,13 +1,11 @@
-fastapi==0.111.0
-uvicorn[standard]==0.29.0
-sqlalchemy==2.0.30
-alembic==1.13.1
+fastapi==0.109.0
+uvicorn[standard]==0.27.0
+sqlalchemy==2.0.25
 psycopg2-binary==2.9.9
-redis==5.0.4
-arq==0.25.0
+redis==5.0.1
 websockets==12.0
-python-dotenv==1.0.1
-pydantic==2.7.1
-pydantic-settings==2.2.1
-httpx==0.27.0
-python-multipart==0.0.9
+python-multipart==0.0.7
+pydantic==2.6.0
+alembic==1.13.1
+httpx==0.26.0
+arq==0.25.0