Add placeholder pages

client/src/pages/PedigreeView.jsx

@@ -0,0 +1,19 @@
+import { useParams } from 'react-router-dom'
+import { GitBranch } from 'lucide-react'
+
+function PedigreeView() {
+  const { id } = useParams()
+
+  return (
+    <div className="container">
+      <h1 style={{ marginBottom: '2rem' }}>Pedigree Chart</h1>
+      <div className="card" style={{ textAlign: 'center', padding: '4rem' }}>
+        <GitBranch size={64} style={{ color: 'var(--text-secondary)', margin: '0 auto 1rem' }} />
+        <h2>Interactive Pedigree Visualization</h2>
+        <p style={{ color: 'var(--text-secondary)', marginTop: '0.5rem' }}>Coming soon - React D3 Tree integration for dog ID: {id}</p>
+      </div>
+    </div>
+  )
+}
+
+export default PedigreeView