Security Audit and Fixes

[google-labs-jules]

• Created SECURITY_AUDIT_REPORT.md
• Fixed Stored XSS in createPiggybank API using zod validation
• Added security headers to next.config.js
• Fixed package.json engines field to be compatible with current Node versions
• Added tests for createPiggybank API
• Updated jest.config.js to handle uuid dependency in tests

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PR created automatically by Jules for task 10303159600818629495 started by @remjx

[google-labs-jules]

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Project	Deployment	Review	Updated (UTC)
coindrop	Error		Jan 24, 2026 5:19pm