[CLAUDE] FE: content polish — typography + PageHeader + Button/Input/Table

Typography base (both apps):
- 14px base, line-height 1.55, letter-spacing -0.003em — Be Vietnam
  Pro render chắc hơn, dấu tiếng Việt rõ hơn
- h1/h2 tracking tighter (-0.018em), h1 weight 700, h2 weight 600
- Tabular numbers trong <table> (tự động align cột số)

PageHeader:
- Title text-[22px] thay vì text-xl — hierarchy mạnh hơn
- Border-bottom + pb-5 thay flat layout — content-area rõ vùng
- Description leading-relaxed + slate-500 — dễ đọc hơn

Button:
- shadow-sm + color-tinted shadow (brand/20, red/20) cho primary/
  danger — có chiều sâu
- active:translate-y-[0.5px] micro-press feedback
- Ring offset 2 (thay 1) + offset-white — focus ring tách rõ

Input/Select/Textarea:
- h-9 thay h-10 — phù hợp dense table layouts
- shadow-[inset_0_1px_0_...] — inset highlight tinh tế
- Focus: border-brand-500 + ring-brand-500/20 — 2 lớp chỉ báo
- Disabled: bg-slate-50 + opacity-70 — rõ disabled state

DataTable:
- rounded-xl + shadow-sm + border-200/80 — card feel nhẹ nhàng hơn
- Header: UPPERCASE text-[11px] tracking-wider — ERP enterprise look
- Row hover: bg-brand-50/40 (thay slate-50) — brand-tinted hover
- Padding tăng từ px-3 py-2 → px-4 py-2.5 — breathing room

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fe-user/src/components/ui/Select.tsx

@@ -7,7 +7,10 @@ export const Select = forwardRef<HTMLSelectElement, Props>(({ className, childre
   <select
     ref={ref}
     className={cn(
-      'h-10 w-full rounded-md border border-slate-300 bg-white px-3 text-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-500 disabled:opacity-50',
+      'h-9 w-full rounded-md border border-slate-300 bg-white px-3 pr-8 text-sm text-slate-900',
+      'shadow-[inset_0_1px_0_rgba(15,23,42,0.02)]',
+      'transition-[border-color,box-shadow] focus-visible:border-brand-500 focus-visible:ring-2 focus-visible:ring-brand-500/20',
+      'disabled:cursor-not-allowed disabled:bg-slate-50 disabled:opacity-70',
       className,
     )}
     {...props}