[stooit]

Summary

• calculator: divide throws Division by zero when divisor is 0
• date-utils: formatRelative rounds days (Math.round(|hours|/24)) — fixes off-by-one
• string-utils: wordCount splits on whitespace runs; implemented truncate (word boundary, ... counts toward maxLength)
• task-manager: implemented remove, update, sortBy (priority/status/createdAt)
• validator: isEmail allows TLDs of 2+ letters; isUrl accepts ports

bun test: 60 pass, 0 fail. No test files modified, no new deps.

Assumptions

• Behaviour choices (sort orders, truncation fallback to hard cut when no space) follow test expectations.
• Stale // BUG:/// TODO: comments left in place (cosmetic).