feat: Re:Link MVP 초기 구현 - 도메인/서비스/프론트엔드 전체

- 모노레포 구조 (Turborepo + pnpm): @relink/domain, @relink/shared, @relink/infrastructure, @relink/database, @relink/web
- 도메인 레이어: 매장(store), 매칭(matching), 업체(vendor), 보조금(subsidy), 계약/에스크로(contract) TDD 완료 (158 단위 테스트)
- 서비스 레이어: 전 도메인 서비스 함수 + 통합 테스트 (58 테스트)
- 프론트엔드: Next.js 15 App Router, 13개 페이지 (사용자 6 + 관리자 7)
- 인프라: PostgreSQL 16 + PostGIS, Prisma ORM, Docker Compose, AuditLog + OutboxEvent 패턴
- .env 파일 포함 (로컬 개발 기본값만 포함, 실제 시크릿 없음)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/ui/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "@relink/ui",
+  "version": "0.0.1",
+  "private": false,
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
+  "scripts": {
+    "build": "tsup",
+    "dev": "tsup --watch",
+    "type-check": "tsc --noEmit",
+    "test": "vitest run",
+    "clean": "rm -rf dist"
+  },
+  "dependencies": {
+    "react": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.2",
+    "tsup": "^8.3.5",
+    "typescript": "^5.7.2",
+    "vitest": "^2.1.8"
+  },
+  "peerDependencies": {
+    "react": "^19.0.0"
+  }
+}

packages/ui/src/button.tsx

@@ -0,0 +1,37 @@
+import type { ButtonHTMLAttributes } from 'react';
+
+export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  readonly variant?: 'primary' | 'secondary' | 'outline';
+  readonly size?: 'sm' | 'md' | 'lg';
+}
+
+export function Button({
+  variant = 'primary',
+  size = 'md',
+  className = '',
+  children,
+  ...props
+}: ButtonProps) {
+  const baseClasses = 'inline-flex items-center justify-center rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 disabled:pointer-events-none disabled:opacity-50';
+
+  const variantClasses = {
+    primary: 'bg-blue-600 text-white hover:bg-blue-700',
+    secondary: 'bg-gray-100 text-gray-900 hover:bg-gray-200',
+    outline: 'border border-gray-300 bg-transparent hover:bg-gray-100',
+  };
+
+  const sizeClasses = {
+    sm: 'h-8 px-3 text-sm',
+    md: 'h-10 px-4 text-sm',
+    lg: 'h-12 px-6 text-base',
+  };
+
+  return (
+    <button
+      className={`${baseClasses} ${variantClasses[variant]} ${sizeClasses[size]} ${className}`}
+      {...props}
+    >
+      {children}
+    </button>
+  );
+}

packages/ui/src/index.ts

@@ -0,0 +1,6 @@
+/**
+ * @relink/ui - Shared UI components
+ */
+
+export { Button } from './button.js';
+export type { ButtonProps } from './button.js';

packages/ui/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "jsx": "react-jsx",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.tsx"],
+  "exclude": ["node_modules", "dist", "**/*.test.ts", "**/*.test.tsx"]
+}

packages/ui/tsup.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  entry: ['src/index.ts'],
+  format: ['esm'],
+  dts: true,
+  clean: true,
+  sourcemap: true,
+  external: ['react', 'react-dom'],
+  esbuildOptions(options) {
+    options.jsx = 'automatic';
+  },
+});

packages/ui/vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+  },
+});