Fix bcrypt password hashing error in admin user creation

- Added fallback to use bcrypt directly if passlib fails
- Handles bcrypt version compatibility issue
- Ensures admin user can be created even with library conflicts

backend/app/main.py

@@ -31,10 +31,22 @@ def create_admin_user():
     try:
         admin = db.query(User).filter(User.email == settings.admin_email).first()
         if not admin:
+            try:
+                hashed_password = get_password_hash(settings.admin_password)
+            except Exception as hash_error:
+                print(f"⚠️  Password hashing error: {hash_error}")
+                print("⚠️  Using direct bcrypt hash as fallback...")
+                # Fallback: use bcrypt directly to avoid passlib version issues
+                import bcrypt
+                hashed_password = bcrypt.hashpw(
+                    settings.admin_password.encode('utf-8'),
+                    bcrypt.gensalt()
+                ).decode('utf-8')
+            
             admin = User(
                 email=settings.admin_email,
                 full_name=settings.admin_full_name,
-                hashed_password=get_password_hash(settings.admin_password),
+                hashed_password=hashed_password,
                 is_admin=True,
                 is_active=True,
                 must_change_password=True  # Force password change on first login