Fix build errors and TypeScript issues

- Install missing UI component dependencies
- Fix unused imports in React components
- Remove version numbers from all import statements
- Fix TypeScript errors in calendar and chart components
- Build now succeeds with production bundle generated

components/ui/sonner.tsx

@@ -1,7 +1,7 @@
 "use client";
 
-import { useTheme } from "next-themes@0.4.6";
-import { Toaster as Sonner, ToasterProps } from "sonner@2.0.3";
+import { useTheme } from "next-themes";
+import { Toaster as Sonner, ToasterProps } from "sonner";
 
 const Toaster = ({ ...props }: ToasterProps) => {
   const { theme = "system" } = useTheme();