refactor(admin): split evidence, import, portfolio pages

Extract components and hooks from oversized pages into colocated
_components/ and _hooks/ subdirectories to enforce the 500-LOC hard cap.
page.tsx files reduced to 205, 121, and 136 LOC respectively.

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

admin-compliance/app/sdk/gci/_components/AuditTab.tsx

@@ -0,0 +1,42 @@
+'use client'
+
+import { GCIResult } from '@/lib/sdk/gci/types'
+
+export function AuditTab({ gci }: { gci: GCIResult }) {
+  return (
+    <div className="space-y-6">
+      <div className="bg-white rounded-xl border border-gray-200 p-6">
+        <h3 className="text-base font-semibold text-gray-900 mb-4">
+          Audit Trail - Berechnung GCI {gci.gci_score.toFixed(1)}
+        </h3>
+        <p className="text-sm text-gray-500 mb-4">
+          Jeder Schritt der GCI-Berechnung ist nachvollziehbar und prueffaehig dokumentiert.
+        </p>
+        <div className="space-y-2">
+          {gci.audit_trail.map((entry, i) => (
+            <div key={i} className="flex items-start gap-3 p-3 border border-gray-100 rounded-lg">
+              <div className={`flex-shrink-0 w-2 h-2 rounded-full mt-1.5 ${
+                entry.impact === 'positive' ? 'bg-green-500' :
+                entry.impact === 'negative' ? 'bg-red-500' :
+                'bg-gray-400'
+              }`} />
+              <div className="flex-1 min-w-0">
+                <div className="flex items-center justify-between">
+                  <span className="text-sm font-medium text-gray-900">{entry.factor}</span>
+                  <span className={`text-sm font-mono ${
+                    entry.impact === 'positive' ? 'text-green-600' :
+                    entry.impact === 'negative' ? 'text-red-600' :
+                    'text-gray-600'
+                  }`}>
+                    {entry.value > 0 ? '+' : ''}{entry.value.toFixed(2)}
+                  </span>
+                </div>
+                <p className="text-xs text-gray-500 mt-0.5">{entry.description}</p>
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  )
+}