feat: Regulatory News Dashboard — proaktive Compliance-Alerts

Zeigt anstehende regulatorische Fristen im Dashboard an, abgeleitet
aus den bestehenden Obligation v2 JSON-Dateien. Keine neue DB-Tabelle.

Erster News-Eintrag: Widerrufsbutton-Pflicht ab 19.06.2026
(EU-RL 2023/2673, §356a BGB) — eigener Text, keine externe Quelle.

Features:
- Go Service: scannt Obligations nach Fristen, berechnet Urgency
- API: GET /sdk/v1/regulatory-news mit Countdown + Farbcodierung
- Dashboard: RegulatoryNewsFeed Sektion mit Countdown-Badges
- Vorlage: news-Feld in v2 JSON fuer zukuenftige regulatorische Updates
- 11 Tests (Sortierung, Urgency, Deadline-Parsing, Real-File-Test)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/components/sdk/regulatory-news/RegulatoryNewsFeed.tsx

@@ -0,0 +1,54 @@
+'use client'
+
+import React, { useState, useEffect } from 'react'
+import { RegulatoryNewsCard, RegulatoryNewsItemData } from './RegulatoryNewsCard'
+
+interface RegulatoryNewsFeedProps {
+  businessModel?: string
+  maxItems?: number
+}
+
+export function RegulatoryNewsFeed({ businessModel, maxItems = 3 }: RegulatoryNewsFeedProps) {
+  const [items, setItems] = useState<RegulatoryNewsItemData[]>([])
+  const [loading, setLoading] = useState(true)
+  const [showAll, setShowAll] = useState(false)
+
+  useEffect(() => {
+    const params = new URLSearchParams({ limit: '10', horizon_days: '365' })
+    if (businessModel) params.set('business_model', businessModel)
+
+    fetch(`/api/sdk/v1/regulatory-news?${params}`)
+      .then(r => r.ok ? r.json() : { items: [] })
+      .then(data => setItems(data.items || []))
+      .catch(() => setItems([]))
+      .finally(() => setLoading(false))
+  }, [businessModel])
+
+  if (loading) return null
+  if (items.length === 0) return null
+
+  const visible = showAll ? items : items.slice(0, maxItems)
+
+  return (
+    <div className="space-y-3">
+      <div className="flex items-center justify-between">
+        <h2 className="text-lg font-semibold text-gray-900 flex items-center gap-2">
+          <span>📢</span> Regulatorische Neuigkeiten
+        </h2>
+        {items.length > maxItems && (
+          <button
+            onClick={() => setShowAll(!showAll)}
+            className="text-sm text-blue-600 hover:underline"
+          >
+            {showAll ? 'Weniger' : `Alle ${items.length} anzeigen`}
+          </button>
+        )}
+      </div>
+      <div className="space-y-2">
+        {visible.map(item => (
+          <RegulatoryNewsCard key={item.id} item={item} />
+        ))}
+      </div>
+    </div>
+  )
+}