revert: undo t0ng7u UI design-system refactor

Revert the following commits:
- 308e3e347 feat(web): polish themed data views and add task log details
- b2a890e75 fix: Fontsource asset resolution across workspace layouts
- 9d1ca545e refactor(web): refine data-table cards and pricing page layout
- 0918bdb49 refactor(web): consolidate design-system primitives and responsive data views
- 262ab9312 style(web): unify design system across default frontend

web/default/src/features/dashboard/components/ui/panel-wrapper.tsx

@@ -42,9 +42,7 @@ function PanelHeader(props: {
 }) {
   const heading = (
     <div className='flex flex-col gap-1'>
-      <div className='text-base font-semibold tracking-tight'>
-        {props.title}
-      </div>
+      <div className='text-sm font-semibold'>{props.title}</div>
       {props.description != null && (
         <div className='text-muted-foreground text-xs'>{props.description}</div>
       )}
@@ -70,7 +68,7 @@ export function PanelWrapper(props: PanelWrapperProps) {
   const resolvedEmptyMessage = props.emptyMessage ?? t('No data available')
   const height = props.height ?? 'h-64'
   const frameClassName = cn(
-    'overflow-hidden rounded-xl border bg-card',
+    'overflow-hidden rounded-2xl border bg-card shadow-xs',
     props.className
   )