Expand React race hub analytics

frontend/src/test/DatasetStatusView.test.tsx

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+import { describe, it, expect } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import { DatasetStatusView } from '../components/DatasetStatusView'
+import type { DatasetInfo } from '../types'
+
+const allAvailable: Record<string, DatasetInfo> = {
+  meeting: { status: 'available', source: 'local', count: 1 },
+  session: { status: 'available', source: 'local', count: 1 },
+  drivers: { status: 'available', source: 'local', count: 20 },
+  results: { status: 'available', source: 'local', count: 20 },
+  starting_grid: { status: 'available', source: 'local', count: 20 },
+}
+
+const partial: Record<string, DatasetInfo> = {
+  meeting: { status: 'available', source: 'local', count: 1 },
+  session: { status: 'available', source: 'local', count: 1 },
+  drivers: { status: 'missing', source: 'none' },
+  results: { status: 'missing', source: 'none' },
+  starting_grid: { status: 'missing', source: 'none' },
+}
+
+describe('DatasetStatusView', () => {
+  it('shows 5/5 when all available', () => {
+    render(<DatasetStatusView datasets={allAvailable} />)
+    expect(screen.getByText(/5\/5/)).toBeInTheDocument()
+  })
+
+  it('shows local badges for available datasets', () => {
+    render(<DatasetStatusView datasets={allAvailable} />)
+    const localBadges = screen.getAllByText('Local')
+    expect(localBadges).toHaveLength(5)
+  })
+
+  it('shows missing badges for missing datasets', () => {
+    render(<DatasetStatusView datasets={partial} />)
+    const missingBadges = screen.getAllByText('Missing')
+    expect(missingBadges).toHaveLength(3)
+  })
+
+  it('shows the ingest command when data is missing', () => {
+    render(<DatasetStatusView datasets={partial} />)
+    expect(screen.getByText(/ingest-session/i)).toBeInTheDocument()
+  })
+
+  it('does not show ingest command when all available', () => {
+    render(<DatasetStatusView datasets={allAvailable} />)
+    expect(screen.queryByText(/ingest-session/i)).not.toBeInTheDocument()
+  })
+
+  it('shows record counts', () => {
+    render(<DatasetStatusView datasets={allAvailable} />)
+    const twenties = screen.getAllByText('20')
+    expect(twenties.length).toBeGreaterThan(0)
+  })
+})