feat: add comprehensive error boundaries and error tracking

[anxkhn]

Problem Description

The application lacks comprehensive error handling with user-friendly error boundaries.

Context

Users should see helpful error messages instead of crashes when something goes wrong.

Files to Investigate

• src/app/error.tsx - Current error component
• All components - Add error boundaries where appropriate

Expected Behavior

Each major section should have its own error boundary with contextual error messages.

Acceptance Criteria

• Add error boundary around event list
• Add error boundary around event detail
• Add error boundary around form
• Log errors for debugging
• Consider error tracking service integration

Suggested Approach

Create reusable ErrorBoundary component and wrap major sections.

Difficulty: Hard

Estimated time: 3-6 hours
Prerequisites: React error boundaries, error handling
Learning outcomes: Error handling patterns, user experience