fix: remove ssr:false from dynamic imports in server components

Turbopack rejects ssr:false in Server Components.
Removed from 4 dynamic imports in:
- src/app/(site)/layout.tsx (RadioPlayerGate)
- src/app/admin/analytics/economy/page.tsx (RevenueChart)
- src/app/admin/analytics/page.tsx (DashboardChart, PeakHoursHeatmap)
- src/app/admin/media/page.tsx (AdminMediaGrid)

src/app/admin/analytics/page.tsx

@@ -25,7 +25,6 @@ const DashboardChart = dynamic(
 		loading: () => (
 			<div className="animate-pulse bg-[var(--admin-surface)] rounded h-48" />
 		),
-		ssr: false,
 	},
 );
 
@@ -38,7 +37,6 @@ const PeakHoursHeatmap = dynamic(
 		loading: () => (
 			<div className="animate-pulse bg-[var(--admin-surface)] rounded h-48" />
 		),
-		ssr: false,
 	},
 );