refactor(admin): split audit-checklist, cookie-banner, escalations pages

Each page.tsx was 750-780 LOC. Extracted React components to _components/
and custom hooks to _hooks/ next to each page.tsx. All three pages are now
under 215 LOC (well within the 500 LOC hard cap). Zero behavior changes.

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

admin-compliance/app/sdk/escalations/_hooks/useEscalations.ts

@@ -0,0 +1,53 @@
+'use client'
+
+import { useState, useEffect } from 'react'
+import { Escalation, EscalationStats } from '../_components/types'
+
+export function useEscalations(filter: string) {
+  const [escalations, setEscalations] = useState<Escalation[]>([])
+  const [stats, setStats] = useState<EscalationStats | null>(null)
+  const [loading, setLoading] = useState(true)
+
+  async function loadEscalations() {
+    try {
+      const params = new URLSearchParams({ limit: '100' })
+      if (filter !== 'all' && ['open', 'in_progress', 'escalated', 'resolved', 'closed'].includes(filter)) {
+        params.set('status', filter)
+      } else if (filter !== 'all' && ['low', 'medium', 'high', 'critical'].includes(filter)) {
+        params.set('priority', filter)
+      }
+      const res = await fetch(`/api/sdk/v1/escalations?${params}`)
+      if (res.ok) {
+        const data = await res.json()
+        setEscalations(data.items || [])
+      }
+    } catch (e) {
+      console.error('Failed to load escalations', e)
+    }
+  }
+
+  async function loadStats() {
+    try {
+      const res = await fetch('/api/sdk/v1/escalations/stats')
+      if (res.ok) {
+        const data = await res.json()
+        setStats(data)
+      }
+    } catch (e) {
+      console.error('Failed to load stats', e)
+    }
+  }
+
+  async function loadAll() {
+    setLoading(true)
+    await Promise.all([loadEscalations(), loadStats()])
+    setLoading(false)
+  }
+
+  useEffect(() => {
+    loadAll()
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [filter])
+
+  return { escalations, stats, loading, loadAll }
+}