feat: add Card component family to shared/ui

src/shared/ui/Card/index.ts

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+export { Card, CardHeader, CardTitle, CardDescription, CardContent, CardFooter } from './ui/Card'
+export type { CardBackground } from './ui/Card'

src/shared/ui/Card/ui/Card.test.tsx

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+import { describe, it, expect } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import { Card, CardHeader, CardTitle, CardDescription, CardContent, CardFooter } from './Card'
+
+describe('Card', () => {
+  describe('rendering', () => {
+    it('renders children', () => {
+      render(<Card>Content</Card>)
+      expect(screen.getByText('Content')).toBeInTheDocument()
+    })
+    it('has brutal-border and brutal-shadow classes', () => {
+      const { container } = render(<Card>Content</Card>)
+      expect(container.firstChild).toHaveClass('brutal-border', 'brutal-shadow')
+    })
+  })
+  describe('background variants', () => {
+    it('defaults to ochre background', () => {
+      const { container } = render(<Card>Content</Card>)
+      expect(container.firstChild).toHaveClass('bg-ochre-clay')
+    })
+    it('applies slate background', () => {
+      const { container } = render(<Card background="slate">Content</Card>)
+      expect(container.firstChild).toHaveClass('bg-slate-indigo')
+    })
+    it('applies white background', () => {
+      const { container } = render(<Card background="white">Content</Card>)
+      expect(container.firstChild).toHaveClass('bg-white')
+    })
+  })
+  describe('padding', () => {
+    it('has default padding', () => {
+      const { container } = render(<Card>Content</Card>)
+      expect(container.firstChild).toHaveClass('p-6')
+    })
+    it('removes padding when noPadding is true', () => {
+      const { container } = render(<Card noPadding>Content</Card>)
+      expect(container.firstChild).not.toHaveClass('p-6')
+    })
+  })
+  describe('className passthrough', () => {
+    it('merges custom className', () => {
+      const { container } = render(<Card className="group">Content</Card>)
+      expect(container.firstChild).toHaveClass('group')
+    })
+  })
+})
+describe('CardHeader', () => {
+  it('renders children with bottom margin', () => {
+    render(<CardHeader>Header</CardHeader>)
+    expect(screen.getByText('Header')).toHaveClass('mb-4')
+  })
+})
+describe('CardTitle', () => {
+  it('renders children as h3', () => {
+    render(<CardTitle>Title</CardTitle>)
+    expect(screen.getByRole('heading', { level: 3 })).toHaveTextContent('Title')
+  })
+})
+describe('CardDescription', () => {
+  it('renders children as paragraph with opacity', () => {
+    render(<CardDescription>Desc</CardDescription>)
+    const el = screen.getByText('Desc')
+    expect(el.tagName).toBe('P')
+    expect(el).toHaveClass('opacity-80')
+  })
+})
+describe('CardContent', () => {
+  it('renders children in a div', () => {
+    render(<CardContent>Body</CardContent>)
+    expect(screen.getByText('Body')).toBeInTheDocument()
+  })
+})
+describe('CardFooter', () => {
+  it('renders children with top border', () => {
+    render(<CardFooter>Footer</CardFooter>)
+    const el = screen.getByText('Footer')
+    expect(el).toHaveClass('brutal-border-top', 'mt-6', 'pt-6')
+  })
+})

src/shared/ui/Card/ui/Card.tsx

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+import type { ReactNode } from 'react'
+import { cn } from '$shared/lib'
+
+export type CardBackground = 'ochre' | 'slate' | 'white'
+
+interface CardProps {
+  /**
+   * Card content
+   */
+  children: ReactNode
+  /**
+   * Additional CSS classes
+   */
+  className?: string
+  /**
+   * Background color preset
+   * @default 'ochre'
+   */
+  background?: CardBackground
+  /**
+   * Remove default padding
+   * @default false
+   */
+  noPadding?: boolean
+}
+
+const BG: Record<CardBackground, string> = {
+  ochre: 'bg-ochre-clay',
+  slate: 'bg-slate-indigo text-ochre-clay',
+  white: 'bg-white',
+}
+
+/**
+ * Brutalist card container with background and padding variants.
+ */
+export function Card({ children, className, background = 'ochre', noPadding = false }: CardProps) {
+  return (
+    <div className={cn('brutal-border brutal-shadow', BG[background], !noPadding && 'p-6 md:p-8', className)}>
+      {children}
+    </div>
+  )
+}
+
+interface SlotProps {
+  /**
+   * Slot content
+   */
+  children: ReactNode
+  /**
+   * Additional CSS classes
+   */
+  className?: string
+}
+
+/**
+ * Card header wrapper — adds bottom margin.
+ */
+export function CardHeader({ children, className }: SlotProps) {
+  return <div className={cn('mb-4', className)}>{children}</div>
+}
+
+/**
+ * Card title — renders as h3.
+ */
+export function CardTitle({ children, className }: SlotProps) {
+  return <h3 className={className}>{children}</h3>
+}
+
+/**
+ * Card description — muted paragraph below the title.
+ */
+export function CardDescription({ children, className }: SlotProps) {
+  return <p className={cn('mt-2 opacity-80', className)}>{children}</p>
+}
+
+/**
+ * Card body content area.
+ */
+export function CardContent({ children, className }: SlotProps) {
+  return <div className={className}>{children}</div>
+}
+
+/**
+ * Card footer — separated by a brutal border-top.
+ */
+export function CardFooter({ children, className }: SlotProps) {
+  return <div className={cn('mt-6 pt-6 brutal-border-top', className)}>{children}</div>
+}