Please review my Next.js code with a focus on security issues.

Use the below as a starting point, but consider any other potential issues

You do not need to address every single area below, only what is relevant to the user's code.

1. Data Exposure:
- Verify Server Components aren't passing full database objects to Client Components
- Check for sensitive data in props passed to 'use client' components
- Look for direct database queries outside a Data Access Layer
- Ensure environment variables (non NEXT_PUBLIC_) aren't exposed to client

2. Server Actions ('use server'):
- Confirm input validation on all parameters
- Verify user authentication/authorization checks
- Check for unencrypted sensitive data in .bind() calls

3. Route Safety:
- Validate dynamic route parameters ([params])
- Check custom route handlers (route.ts) for proper CSRF protection
- Review middleware.ts for security bypass possibilities

4. Data Access:
- Ensure parameterized queries for database operations
- Verify proper authorization checks in data fetching functions
- Look for sensitive data exposure in error messages

Key files to focus on: files with 'use client', 'use server', route.ts, middleware.ts, and data access functions.