Review the recent changes and provide:

Summary: What was built or changed? Explain in 2-3 sentences.
Files changed: List the files that were added or modified, grouped by area (e.g., API routes, components, database, utils).
Security check:
- Any new API endpoints? Are they properly authenticated?
- Any database writes? Is the input validated?
- Any external API calls? Are secrets handled correctly?
- Any user-facing inputs? Are they sanitized?
Risk areas: Which files or functions are most likely to cause problems? Why?
Edge cases: What scenarios might break this? What hasn't been tested?
Missing pieces: Based on what this feature is supposed to do, is anything obviously incomplete or not wired up?
Questions for me: Anything you're uncertain about or made assumptions on that I should verify?

explain-changes