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/OverviewTab.tsx

@@ -0,0 +1,91 @@
+'use client'
+
+import { GCIResult, GCIHistoryResponse, WeightProfile, MATURITY_INFO, getScoreRingColor } from '@/lib/sdk/gci/types'
+import { ScoreCircle, MaturityBadge, AreaScoreBar } from './GCIHelpers'
+
+export function OverviewTab({ gci, history, profiles, selectedProfile, onProfileChange }: {
+  gci: GCIResult
+  history: GCIHistoryResponse | null
+  profiles: WeightProfile[]
+  selectedProfile: string
+  onProfileChange: (p: string) => void
+}) {
+  return (
+    <div className="space-y-6">
+      {profiles.length > 0 && (
+        <div className="flex items-center gap-3">
+          <label className="text-sm font-medium text-gray-700">Gewichtungsprofil:</label>
+          <select
+            value={selectedProfile}
+            onChange={e => onProfileChange(e.target.value)}
+            className="rounded-md border-gray-300 shadow-sm text-sm focus:border-purple-500 focus:ring-purple-500"
+          >
+            {profiles.map(p => (
+              <option key={p.id} value={p.id}>{p.name}</option>
+            ))}
+          </select>
+        </div>
+      )}
+
+      <div className="bg-white rounded-xl border border-gray-200 p-6">
+        <div className="flex flex-col md:flex-row items-center gap-8">
+          <ScoreCircle score={gci.gci_score} label="GCI Score" />
+          <div className="flex-1 space-y-4">
+            <div>
+              <h3 className="text-lg font-semibold text-gray-900">Gesamt-Compliance-Index</h3>
+              <div className="flex items-center gap-3 mt-2">
+                <MaturityBadge level={gci.maturity_level} />
+                <span className="text-sm text-gray-500">
+                  Berechnet: {new Date(gci.calculated_at).toLocaleString('de-DE')}
+                </span>
+              </div>
+            </div>
+            <p className="text-sm text-gray-600">{MATURITY_INFO[gci.maturity_level]?.description || ''}</p>
+          </div>
+        </div>
+      </div>
+
+      <div className="bg-white rounded-xl border border-gray-200 p-6">
+        <h3 className="text-base font-semibold text-gray-900 mb-4">Regulierungsbereiche</h3>
+        <div className="space-y-4">
+          {gci.area_scores.map(area => (
+            <AreaScoreBar key={area.regulation_id} name={area.regulation_name} score={area.score} weight={area.weight} />
+          ))}
+        </div>
+      </div>
+
+      {history && history.snapshots.length > 0 && (
+        <div className="bg-white rounded-xl border border-gray-200 p-6">
+          <h3 className="text-base font-semibold text-gray-900 mb-4">Verlauf</h3>
+          <div className="flex items-end gap-2 h-32">
+            {history.snapshots.map((snap, i) => (
+              <div key={i} className="flex-1 flex flex-col items-center gap-1">
+                <span className="text-xs text-gray-500">{snap.score.toFixed(0)}</span>
+                <div
+                  className="w-full rounded-t transition-all duration-500"
+                  style={{ height: `${(snap.score / 100) * 100}%`, backgroundColor: getScoreRingColor(snap.score), minHeight: '4px' }}
+                />
+                <span className="text-[10px] text-gray-400">
+                  {new Date(snap.calculated_at).toLocaleDateString('de-DE', { month: 'short' })}
+                </span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+        <div className="bg-white rounded-xl border border-gray-200 p-4">
+          <div className="text-sm text-gray-500">Kritikalitaets-Multiplikator</div>
+          <div className="text-2xl font-bold text-gray-900">{gci.criticality_multiplier.toFixed(2)}x</div>
+        </div>
+        <div className="bg-white rounded-xl border border-gray-200 p-4">
+          <div className="text-sm text-gray-500">Incident-Korrektur</div>
+          <div className={`text-2xl font-bold ${gci.incident_adjustment < 0 ? 'text-red-600' : 'text-green-600'}`}>
+            {gci.incident_adjustment > 0 ? '+' : ''}{gci.incident_adjustment.toFixed(1)}
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}