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/app/database.py

@@ -1,12 +1,14 @@
+import os
 from sqlalchemy import create_engine
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import sessionmaker
-from app.config import settings
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
 
-engine = create_engine(settings.DATABASE_URL)
+DATABASE_URL = os.environ.get("DATABASE_URL", "postgresql://servesync:servesync@localhost:5432/servesync")
+
+engine = create_engine(DATABASE_URL)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
-Base = declarative_base()
 
+class Base(DeclarativeBase):
+    pass
 
 def get_db():
     db = SessionLocal()