requested mvp fixes 2.0

[michelleyeoh]

• Fix the arrow rendering on load page

[ReehalS]

• Date Selector on Schedule page Mobile need a background color to improve readability

• Date Selector on Schedule page Desktop: While this is implemented per fairly close to the Figma design, the date selector content moving when the new date is selected does not look very clean. Rather than conditionally rendering it, use the activeDay to apply the tailwind class 'invisible' when required. This would keep the space for the (.), but keep it hidden until required.
  Current UI:
  
  Screen.Recording.2026-02-23.at.2.28.09.PM.mov

Reference of what it would look like with this change:

Screen.Recording.2026-02-23.at.2.29.37.PM.mov

Sammy wants a hover state as well, with the date selector showing the (.) on hover, but with the unselected state's color, which is like 1-2 LOC. Example for this is on the figma

Both design changes have been approved by Sammy.