refactor(web): enhance ui visual polish and ux

- Replace native selects with Shadcn UI Select in Settings
- Increase ActivityChart height for better visibility
- specific Economy Overview card height to fill column
- Add hover/active scale animations to sidebar items

web/src/pages/Dashboard.tsx

@@ -100,7 +100,7 @@ export function Dashboard() {
             </Card>
 
             <div className="grid gap-6 md:grid-cols-2 lg:grid-cols-7">
-                <Card className="col-span-4 glass border-white/5">
+                <Card className="col-span-4 glass border-white/5 h-full">
                     <CardHeader className="flex flex-row items-start justify-between">
                         <div>
                             <CardTitle className="text-xl font-bold flex items-center gap-2">