Initial commit: Add project files

frontend/src/features/data-quality/pages/DataQualityPage.vue

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+<script setup lang="ts">
+import { computed } from 'vue'
+import type { UiGridColumn } from '../../../shared/ui/adapter/contracts'
+import DataGridShell from '../../../shared/ui/DataGridShell.vue'
+import type { DataQualityRun } from '../schema'
+
+// Template fixture only. Production data must come from DAT-03 and pass Zod validation.
+const rows: DataQualityRun[] = []
+const columns = computed<UiGridColumn[]>(() => [
+  { field: 'source', header: 'Source' },
+  { field: 'session', header: 'Session' },
+  { field: 'status', header: 'DQ' },
+  { field: 'rowCount', header: 'Rows' },
+  { field: 'failedRows', header: 'Failed' },
+  { field: 'sourceWatermark', header: 'Watermark' },
+  { field: 'datasetId', header: 'Dataset' },
+  { field: 'completedAt', header: 'Completed' }
+])
+</script>
+
+<template>
+  <main>
+    <header>
+      <h1>데이터 품질 운영</h1>
+      <p>Raw→PIT→DQ→Dataset lineage를 확인합니다. QUARANTINED 데이터는 추천에 사용할 수 없습니다.</p>
+    </header>
+    <DataGridShell
+      :rows="rows"
+      :columns="columns"
+      empty-message="DAT-03 계약이 구현되면 서버 검증 결과가 표시됩니다."
+    />
+  </main>
+</template>

frontend/src/features/data-quality/schema.ts

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+import { z } from 'zod'
+
+export const dataQualityStatusSchema = z.enum(['PASS', 'WARN', 'QUARANTINED'])
+
+export const dataQualityRunSchema = z.object({
+  runId: z.string().uuid(),
+  source: z.string().min(1),
+  session: z.string().min(1),
+  status: dataQualityStatusSchema,
+  rowCount: z.number().int().nonnegative(),
+  failedRows: z.number().int().nonnegative(),
+  sourceWatermark: z.string().min(1),
+  datasetId: z.string().min(1),
+  contentHash: z.string().min(1),
+  completedAt: z.string().datetime({ offset: true })
+}).superRefine((value, ctx) => {
+  if (value.failedRows > value.rowCount) {
+    ctx.addIssue({
+      code: z.ZodIssueCode.custom,
+      message: '실패 행 수는 전체 행 수를 초과할 수 없습니다.',
+      path: ['failedRows']
+    })
+  }
+})
+
+export const dataQualityRunsSchema = z.array(dataQualityRunSchema)
+export type DataQualityRun = z.infer<typeof dataQualityRunSchema>

frontend/src/features/data-quality/tests/schema.spec.ts

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+import { describe, expect, it } from 'vitest'
+import { dataQualityRunSchema } from '../schema'
+
+const valid = {
+  runId: '00000000-0000-0000-0000-000000000001',
+  source: 'KRX',
+  session: '2026-08-01',
+  status: 'PASS',
+  rowCount: 100,
+  failedRows: 0,
+  sourceWatermark: 'KRX:2026-08-01',
+  datasetId: 'dataset-1',
+  contentHash: 'hash-1',
+  completedAt: '2026-08-01T09:00:00Z'
+}
+
+describe('data quality contract', () => {
+  it('accepts a valid run', () => {
+    expect(dataQualityRunSchema.safeParse(valid).success).toBe(true)
+  })
+
+  it('rejects failed rows greater than total rows', () => {
+    expect(dataQualityRunSchema.safeParse({ ...valid, failedRows: 101 }).success).toBe(false)
+  })
+})