[CLAUDE] FE-Admin: redesign Phase 1 — density-first design system (NAMGROUP-ref, giữ brand)

Tham khảo NAMGROUP density conventions, GIỮ brand #1F7DC1 + Be Vietnam Pro.
- index.css: density heading ladder (semibold, drop font-bold) + .label-eyebrow util
- 6 UI primitives (Button/Input/Label/Select/Textarea/Dialog): text-xs font-semibold, py-1.5 ≤36px, rounded-lg, brand focus-ring
- 6 shell (DataTable sticky-thead+RowActions/Layout brand-rail/TopBar/PageHeader/PhaseBadge/EmptyState)
- DashboardPage flagship: KPI cards + brand-tinted icon chips + uppercase labels

Visual-only — functionality unchanged (Button variant/size keys stable 51 call-sites, props/forwardRef intact). build 0 TS err. reviewer PASS 0 blocker (2 minor slate-400 hint a11y defer). fe-admin only (fe-user mirror = Phase 3). Dashboard live-visual blocked by dev auth-rig → xem live sau deploy.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fe-admin/src/components/EmptyState.tsx

@@ -17,12 +17,12 @@ export function EmptyState({
   return (
     <div className={cn('flex flex-col items-center justify-center gap-2 py-10 text-center', className)}>
       {Icon && (
-        <div className="rounded-full bg-slate-100 p-3 text-slate-400">
-          <Icon className="h-6 w-6" />
+        <div className="rounded-xl bg-slate-100 p-2.5 text-slate-400">
+          <Icon className="h-5 w-5" />
         </div>
       )}
-      <div className="text-sm font-medium text-slate-700">{title}</div>
-      {description && <div className="max-w-sm text-xs text-slate-400">{description}</div>}
+      <div className="text-[13px] font-semibold text-slate-700">{title}</div>
+      {description && <div className="max-w-sm text-xs leading-relaxed text-slate-500">{description}</div>}
       {action && <div className="mt-2">{action}</div>}
     </div>
   )