Description

Create utility modules for common functionality used throughout the application.

Tasks

• Create logger utility (edge-compatible)
• Create error handling utilities with custom error classes
• Create validation utilities for input sanitization
• Create ID generation utility using nanoid

Acceptance Criteria

• Logger works in Cloudflare Workers environment (no console.log in production)
• Error classes provide consistent error handling across the app
• Validation utilities prevent common security issues (XSS, injection)
• ID generation creates URL-safe unique identifiers
• All utilities have unit tests
• All utilities are documented with JSDoc

Technical Requirements

• Must be edge-runtime compatible (no Node.js APIs)
• Should follow functional programming patterns where appropriate
• Keep bundle size minimal