fix: reduce MobileTabs button padding from py-2.5 to py-1.5

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

components/ui/mobile-tabs.tsx

@@ -19,7 +19,7 @@ export function MobileTabs({ tabs, active, onChange }: MobileTabsProps) {
           key={value}
           onClick={() => onChange(value)}
           className={cn(
-            'flex-1 py-2.5 rounded-lg text-sm font-medium transition-all',
+            'flex-1 py-1.5 rounded-lg text-sm font-medium transition-all',
             active === value
               ? 'bg-primary text-primary-foreground shadow-sm'
               : 'text-muted-foreground hover:text-foreground'