Add error handling and input validation for core functions

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Problem

The current codebase lacks comprehensive error handling and input validation in several core functions, which could lead to runtime errors and unexpected behavior.

Proposed Solution

• Add try-catch blocks for async operations
• Implement input validation for function parameters
• Add proper error messages and logging
• Create utility functions for common validation patterns

Technical Details

• Validate null/undefined inputs
• Add type checking where appropriate
• Implement graceful error recovery
• Add error boundary patterns

Benefits

• Improved application stability
• Better debugging experience
• More predictable behavior
• Enhanced user experience with meaningful error messages