refactor: improve layout structure and consistency across components

- Refactored layout structure in multiple components to enhance consistency and maintainability by introducing outer and inner wrapper classes.
- Updated the `MonthNavHeader` component for shared month navigation functionality, improving code reuse.
- Adjusted padding and margin properties in various components to ensure a cohesive design and better responsiveness.
- Removed unnecessary padding from certain elements to streamline the layout and improve visual clarity.

webapp-next/src/components/ui/card.tsx

@@ -20,7 +20,7 @@ function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
     <div
       data-slot="card-header"
       className={cn(
-        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
+        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-4 sm:px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
         className
       )}
       {...props}
@@ -65,7 +65,7 @@ function CardContent({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="card-content"
-      className={cn("px-6", className)}
+      className={cn("px-4 sm:px-6", className)}
       {...props}
     />
   )
@@ -75,7 +75,7 @@ function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="card-footer"
-      className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
+      className={cn("flex items-center px-4 sm:px-6 [.border-t]:pt-6", className)}
       {...props}
     />
   )