This update puts sleep front and center.

- Sleep tracking, reimagined: live sleep timer, next-sleep window by age, and a 7-day chart vs the recommended range
- Feeding tracking with weekly patterns and smart reminders (feeds, vitamin D, medication, routine)
- Gentle bedtime goal: move bedtime 15 minutes earlier every 3 days
- New For Parents section: mood check-ins and a breathing exercise
- Source-based behavior & development library, clearer than ever
- Fixes & polish: the sleep chart now updates instantly after you edit or delete an entry, refined safe-sleep guidance, and a lighter, warmer look