Critical:
- InvoiceDetail: sanitize notes HTML with DOMPurify
- OrderDetail: use proper DOMPurify import instead of window fallback
Important:
- AttendanceBalances: add fund_to_date to interface, remove as-any casts
- All schemas: replace z.any() with z.preprocess for boolean fields
- Routes: simplify boolean coercion (Zod handles it now)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>