style(analytics): Improve calendar popover layout and spacing

- Refactor calendar popover content container
- Update container to use flex layout with items-start alignment
- Adjust padding and gap for better visual spacing
- Enhance overall design consistency in analytics page calendar component

Author: akshay0611

app/dashboard/company/[slug]/analytics/page.tsx

@@ -222,7 +222,7 @@ export default function AnalyticsPage() {
                 </Button>
               </PopoverTrigger>
               <PopoverContent className="w-auto p-0 bg-zinc-900 border-zinc-700" align="start">
-                <div className="p-3 space-y-3">
+                <div className="flex items-start gap-4 p-4">
                   <div>
                     <p className="text-sm font-medium text-white mb-2">From</p>
                     <Calendar