API/ shadcn for Calendar

I again repeat to fix the calendar using API or Shadcn code. we have to look after some of the simple functionality on our own. Like Adarsha did his in Logs pages.

The issue provides no file, test, or specific calendar behavior; begin by locating the calendar entry point and reviewing the Logs pages for the referenced pattern. Confirm the required API or shadcn approach and the simple functionality that must be supported before implementation; done cannot be verified from the issue as written.

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