- Add selected date state and conversation mapping in useSidebarPlan
- Connect calendar cells to conversation switching logic
- Add conversation indicator dot on dates with sessions
- Only clickable dates show hand cursor (today + dates with conversations)
- Add .selected styling for non-today dates, today keeps blue
- Fix hover effect to only apply to non-today dates
- Add daily doc for session date mapping feature
BREAKING: Calendar click now switches sessions by date
WIN-JHFT4D3SIVT\caoxiaozhu
721ddbeef9