Initial commit: NextGen PPR System

- FastAPI backend with JWT authentication
- MySQL database with full schema
- Docker Compose orchestration
- CSV data import for 43,208 airports and 519,999 aircraft
- Complete PPR management API
- Modernized replacement for PHP-based system

backend/app/api/deps.py

@@ -0,0 +1,47 @@
+from typing import Generator
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
+from sqlalchemy.orm import Session
+from app.db.session import SessionLocal
+from app.core.security import verify_token
+from app.crud.crud_user import user as crud_user
+
+security = HTTPBearer()
+
+
+def get_db() -> Generator:
+    """Database dependency"""
+    try:
+        db = SessionLocal()
+        yield db
+    finally:
+        db.close()
+
+
+async def get_current_user(
+    db: Session = Depends(get_db),
+    credentials: HTTPAuthorizationCredentials = Depends(security)
+):
+    """Get current authenticated user"""
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    
+    username = verify_token(credentials.credentials)
+    if username is None:
+        raise credentials_exception
+    
+    user = crud_user.get_by_username(db, username=username)
+    if user is None:
+        raise credentials_exception
+    
+    return user
+
+
+def get_current_active_user(
+    current_user = Depends(get_current_user),
+):
+    """Get current active user (for future use if we add user status)"""
+    return current_user