feat: add shadcn admin workspace

admin/src/components/ui/badge.tsx

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+import * as React from 'react'
+import { cva, type VariantProps } from 'class-variance-authority'
+
+import { cn } from '@/lib/utils'
+
+const badgeVariants = cva(
+  'inline-flex items-center rounded-full border px-2.5 py-1 text-[11px] font-semibold uppercase tracking-[0.18em] transition-colors',
+  {
+    variants: {
+      variant: {
+        default: 'border-primary/20 bg-primary/10 text-primary',
+        secondary: 'border-border bg-secondary text-secondary-foreground',
+        outline: 'border-border/80 bg-background/60 text-muted-foreground',
+        success: 'border-emerald-500/20 bg-emerald-500/12 text-emerald-600',
+        warning: 'border-amber-500/20 bg-amber-500/12 text-amber-700',
+        danger: 'border-rose-500/20 bg-rose-500/12 text-rose-600',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  },
+)
+
+function Badge({
+  className,
+  variant,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement> & VariantProps<typeof badgeVariants>) {
+  return <div className={cn(badgeVariants({ variant }), className)} {...props} />
+}
+
+export { Badge, badgeVariants }

admin/src/components/ui/button.tsx

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+import * as React from 'react'
+import { Slot } from '@radix-ui/react-slot'
+import { cva, type VariantProps } from 'class-variance-authority'
+
+import { cn } from '@/lib/utils'
+
+const buttonVariants = cva(
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-lg text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 outline-none ring-offset-background focus-visible:ring-2 focus-visible:ring-ring/70 focus-visible:ring-offset-2 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
+  {
+    variants: {
+      variant: {
+        default:
+          'bg-primary text-primary-foreground shadow-[0_12px_30px_rgb(37_99_235_/_0.22)] hover:bg-primary/90',
+        secondary: 'bg-secondary text-secondary-foreground hover:bg-secondary/80',
+        outline:
+          'border border-border bg-background/80 text-foreground hover:bg-accent hover:text-accent-foreground',
+        ghost: 'text-foreground hover:bg-accent hover:text-accent-foreground',
+        danger:
+          'bg-destructive text-destructive-foreground shadow-[0_12px_30px_rgb(220_38_38_/_0.18)] hover:bg-destructive/90',
+      },
+      size: {
+        default: 'h-10 px-4 py-2',
+        sm: 'h-9 rounded-md px-3',
+        lg: 'h-11 rounded-xl px-5',
+        icon: 'h-10 w-10',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default',
+    },
+  },
+)
+
+export interface ButtonProps
+  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {
+  asChild?: boolean
+}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, asChild = false, ...props }, ref) => {
+    const Comp = asChild ? Slot : 'button'
+
+    return (
+      <Comp
+        className={cn(buttonVariants({ variant, size, className }))}
+        ref={ref}
+        {...props}
+      />
+    )
+  },
+)
+Button.displayName = 'Button'
+
+export { Button, buttonVariants }

admin/src/components/ui/card.tsx

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+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+const Card = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div
+      ref={ref}
+      className={cn(
+        'rounded-3xl border border-border/70 bg-card/85 text-card-foreground shadow-[0_24px_80px_rgba(15,23,42,0.12)] backdrop-blur',
+        className,
+      )}
+      {...props}
+    />
+  ),
+)
+Card.displayName = 'Card'
+
+const CardHeader = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('flex flex-col gap-2 p-6', className)} {...props} />
+  ),
+)
+CardHeader.displayName = 'CardHeader'
+
+const CardTitle = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLHeadingElement>>(
+  ({ className, ...props }, ref) => (
+    <h3
+      ref={ref}
+      className={cn('text-lg font-semibold tracking-tight text-balance', className)}
+      {...props}
+    />
+  ),
+)
+CardTitle.displayName = 'CardTitle'
+
+const CardDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => (
+  <p ref={ref} className={cn('text-sm leading-6 text-muted-foreground', className)} {...props} />
+))
+CardDescription.displayName = 'CardDescription'
+
+const CardContent = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('px-6 pb-6', className)} {...props} />
+  ),
+)
+CardContent.displayName = 'CardContent'
+
+const CardFooter = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('flex items-center px-6 pb-6', className)} {...props} />
+  ),
+)
+CardFooter.displayName = 'CardFooter'
+
+export { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle }

admin/src/components/ui/input.tsx

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+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<'input'>>(
+  ({ className, type, ...props }, ref) => {
+    return (
+      <input
+        type={type}
+        className={cn(
+          'flex h-11 w-full rounded-xl border border-input bg-background/80 px-3 py-2 text-sm shadow-sm outline-none transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:ring-2 focus-visible:ring-ring/70 disabled:cursor-not-allowed disabled:opacity-50',
+          className,
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  },
+)
+Input.displayName = 'Input'
+
+export { Input }

admin/src/components/ui/label.tsx

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+import * as React from 'react'
+import * as LabelPrimitive from '@radix-ui/react-label'
+import { cva, type VariantProps } from 'class-variance-authority'
+
+import { cn } from '@/lib/utils'
+
+const labelVariants = cva('text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70')
+
+const Label = React.forwardRef<
+  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root> &
+    VariantProps<typeof labelVariants>
+>(({ className, ...props }, ref) => (
+  <LabelPrimitive.Root ref={ref} className={cn(labelVariants(), className)} {...props} />
+))
+Label.displayName = LabelPrimitive.Root.displayName
+
+export { Label }

admin/src/components/ui/separator.tsx

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+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+function Separator({
+  className,
+  orientation = 'horizontal',
+  decorative = true,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement> & {
+  orientation?: 'horizontal' | 'vertical'
+  decorative?: boolean
+}) {
+  return (
+    <div
+      aria-hidden={decorative}
+      data-orientation={orientation}
+      className={cn(
+        'shrink-0 bg-border/80',
+        orientation === 'horizontal' ? 'h-px w-full' : 'h-full w-px',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Separator }

admin/src/components/ui/skeleton.tsx

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+import type { HTMLAttributes } from 'react'
+
+import { cn } from '@/lib/utils'
+
+function Skeleton({ className, ...props }: HTMLAttributes<HTMLDivElement>) {
+  return <div className={cn('animate-pulse rounded-md bg-muted', className)} {...props} />
+}
+
+export { Skeleton }

admin/src/components/ui/table.tsx

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+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+const Table = React.forwardRef<HTMLTableElement, React.HTMLAttributes<HTMLTableElement>>(
+  ({ className, ...props }, ref) => (
+    <div className="relative w-full overflow-auto">
+      <table ref={ref} className={cn('w-full caption-bottom text-sm', className)} {...props} />
+    </div>
+  ),
+)
+Table.displayName = 'Table'
+
+const TableHeader = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <thead ref={ref} className={cn('[&_tr]:border-b [&_tr]:border-border/70', className)} {...props} />
+))
+TableHeader.displayName = 'TableHeader'
+
+const TableBody = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tbody ref={ref} className={cn('[&_tr:last-child]:border-0', className)} {...props} />
+))
+TableBody.displayName = 'TableBody'
+
+const TableRow = React.forwardRef<HTMLTableRowElement, React.HTMLAttributes<HTMLTableRowElement>>(
+  ({ className, ...props }, ref) => (
+    <tr
+      ref={ref}
+      className={cn(
+        'border-b border-border/60 transition-colors hover:bg-accent/40 data-[state=selected]:bg-accent/60',
+        className,
+      )}
+      {...props}
+    />
+  ),
+)
+TableRow.displayName = 'TableRow'
+
+const TableHead = React.forwardRef<
+  HTMLTableCellElement,
+  React.ThHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <th
+    ref={ref}
+    className={cn(
+      'h-11 px-4 text-left align-middle text-xs font-semibold uppercase tracking-[0.18em] text-muted-foreground',
+      className,
+    )}
+    {...props}
+  />
+))
+TableHead.displayName = 'TableHead'
+
+const TableCell = React.forwardRef<
+  HTMLTableCellElement,
+  React.TdHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <td ref={ref} className={cn('p-4 align-middle', className)} {...props} />
+))
+TableCell.displayName = 'TableCell'
+
+export { Table, TableBody, TableCell, TableHead, TableHeader, TableRow }

admin/src/components/ui/textarea.tsx

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+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+const Textarea = React.forwardRef<HTMLTextAreaElement, React.ComponentProps<'textarea'>>(
+  ({ className, ...props }, ref) => {
+    return (
+      <textarea
+        className={cn(
+          'flex min-h-[132px] w-full rounded-2xl border border-input bg-background/80 px-3 py-3 text-sm shadow-sm outline-none transition-colors placeholder:text-muted-foreground focus-visible:ring-2 focus-visible:ring-ring/70 disabled:cursor-not-allowed disabled:opacity-50',
+          className,
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  },
+)
+Textarea.displayName = 'Textarea'
+
+export { Textarea }