Cleaner Calendar layout

Coming in 8.4. The Calendar tab is getting decluttered:

• The Morning / Afternoon / Evening / Night sections become collapsible cards — only the current time-of-day block is open by default, the rest stay tucked away until you tap them
• The duplicate stats strip under the date is gone — Body & Health and My Calc already surface those numbers
• Generous spacing and a colored accent on each block so the screen reads as a real schedule, not a wall of cards