feat(13-06): TenderDetail renders all cross-source links

Tender.sources[] added to the API client type (sourcePortal, sourceUrl,
sourceNoticeId). TenderDetail now renders one link per TenderSource
with a German portal label (DÖE/tender24/DTVP/...), falling back to
the existing single sourceUrl block when sources is missing or empty
(older responses, single-source tenders).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/src/app/(portal)/modules/tender-radar/components/TenderDetail.test.tsx

@@ -94,6 +94,87 @@ describe('TenderDetail', () => {
     expect(screen.getByText('keine Frist angegeben')).toBeInTheDocument();
   });
 
+  it('renders a link for every source when tender.sources[] has multiple entries (13-06, SCHEMA-03)', async () => {
+    mockGetTender.mockResolvedValue({
+      id: 't4',
+      sourcePortal: 'doe-opendata',
+      title: 'Neubau Kita',
+      buyerName: 'Gemeinde Beispiel',
+      cpvCodes: ['45214100'],
+      region: null,
+      plz: null,
+      bundesland: null,
+      deadlineAt: null,
+      estimatedValue: null,
+      procedureType: null,
+      status: 'active',
+      sourceUrl: 'https://example-portal.de/ausschreibung/t4',
+      publishedAt: '2026-07-01T00:00:00.000Z',
+      sources: [
+        {
+          sourcePortal: 'doe-opendata',
+          sourceUrl: 'https://doe.example/t4',
+          sourceNoticeId: 'doe-t4',
+        },
+        {
+          sourcePortal: 'cosinex-dtvp',
+          sourceUrl: 'https://dtvp.example/t4',
+          sourceNoticeId: 'dtvp-t4',
+        },
+      ],
+    });
+
+    const { TenderDetail } = await import('./TenderDetail');
+    render(<TenderDetail tenderId="t4" onClose={() => {}} />);
+
+    await waitFor(() => {
+      expect(screen.getByText('Neubau Kita')).toBeInTheDocument();
+    });
+
+    const links = screen.getAllByRole('link', { name: /Quellportal/i });
+    expect(links).toHaveLength(2);
+    expect(links[0]).toHaveAttribute('href', 'https://doe.example/t4');
+    expect(links[0]).toHaveTextContent('DÖE');
+    expect(links[0]).toHaveAttribute('target', '_blank');
+    expect(links[0]).toHaveAttribute('rel', 'noopener noreferrer');
+    expect(links[1]).toHaveAttribute('href', 'https://dtvp.example/t4');
+    expect(links[1]).toHaveTextContent('DTVP');
+  });
+
+  it('falls back to the single sourceUrl block when tender.sources is missing/empty', async () => {
+    mockGetTender.mockResolvedValue({
+      id: 't5',
+      sourcePortal: 'doe-opendata',
+      title: 'Sanierung Brücke',
+      buyerName: null,
+      cpvCodes: [],
+      region: null,
+      plz: null,
+      bundesland: null,
+      deadlineAt: null,
+      estimatedValue: null,
+      procedureType: null,
+      status: 'active',
+      sourceUrl: 'https://example-portal.de/ausschreibung/t5',
+      publishedAt: '2026-07-01T00:00:00.000Z',
+      sources: [],
+    });
+
+    const { TenderDetail } = await import('./TenderDetail');
+    render(<TenderDetail tenderId="t5" onClose={() => {}} />);
+
+    await waitFor(() => {
+      expect(screen.getByText('Sanierung Brücke')).toBeInTheDocument();
+    });
+
+    const links = screen.getAllByRole('link', { name: /Quellportal/i });
+    expect(links).toHaveLength(1);
+    expect(links[0]).toHaveAttribute(
+      'href',
+      'https://example-portal.de/ausschreibung/t5',
+    );
+  });
+
   it('always shows the no-local-mirroring notice for Vergabeunterlagen', async () => {
     mockGetTender.mockResolvedValue({
       id: 't3',

apps/web/src/app/(portal)/modules/tender-radar/components/TenderDetail.tsx

@@ -14,12 +14,18 @@ import { getTender, type Tender } from '@/lib/tender-radar-api';
  * nur die `tenderId` aus dem URL-Param + `onClose` durch, der eigentliche
  * `getTender`-Aufruf und dessen Ladezustand leben hier.
  *
- * D-07/UI-02 — zeigt alle vorhandenen Tender-Felder + einen Link zur
+ * D-07/UI-02 — zeigt alle vorhandenen Tender-Felder + Links zur Quelle.
- * Quelle (`sourceUrl`). `rawPayload` ist zu 100% NULL in der Live-DB
+ * `rawPayload` ist zu 100% NULL in der Live-DB (Research OQ1) — es
- * (Research OQ1) — es existieren KEINE gespeicherten Dokument-URLs. Daher:
+ * existieren KEINE gespeicherten Dokument-URLs. Daher: KEIN Live-
- * KEIN Live-Dokument-Fetch, KEIN lokales Spiegeln der Vergabeunterlagen —
+ * Dokument-Fetch, KEIN lokales Spiegeln der Vergabeunterlagen — nur die
- * nur der Quell-Link führt zum Original (T-11-09: `rel="noopener
+ * Quell-Links führen zum Original (T-11-09: `rel="noopener noreferrer"`
- * noreferrer"` + `target="_blank"` gegen Tampering über den externen Link).
+ * + `target="_blank"` gegen Tampering über den externen Link).
+ *
+ * 13-06 (SCHEMA-03/D-03): ein cross-source-deduplizierter Tender kann
+ * mehrere `TenderSource`-Zeilen haben (`tender.sources[]`) — die Liste
+ * zeigt EINEN Link je Quellportal statt nur des einzelnen `sourceUrl`.
+ * Fallback auf den einzelnen `sourceUrl`-Block, falls `sources` fehlt
+ * oder leer ist (Alt-Tender / API-Antworten ohne include).
  *
  * Hardcoded German strings — i18n rollout is Phase 14 (Research Open
  * Question 3, RESOLVED), same convention as ResultsList/FilterPanel.
@@ -63,6 +69,23 @@ function fieldLabelCls() {
   return 'text-xs font-semibold uppercase tracking-wider text-muted-foreground';
 }
 
+/**
+ * Hardcoded German display labels for known sourcePortal slugs (13-06,
+ * SCHEMA-03/D-03). i18n rollout is Phase 14 — same convention as the rest
+ * of this component. Unknown slugs (future portals) fall back to the raw
+ * slug so the list never silently drops a source.
+ */
+function portalLabel(sourcePortal: string): string {
+  const labels: Record<string, string> = {
+    'doe-opendata': 'DÖE',
+    tender24: 'tender24',
+    'lhs-vpbw': 'lhs-vpbw',
+    'vergabe.landbw': 'vergabe.landbw',
+    'cosinex-dtvp': 'DTVP',
+  };
+  return labels[sourcePortal] ?? sourcePortal;
+}
+
 export function TenderDetail({ tenderId, onClose }: TenderDetailProps) {
   const [tender, setTender] = useState<Tender | null>(null);
   const [isLoading, setIsLoading] = useState(true);
@@ -193,7 +216,30 @@ export function TenderDetail({ tenderId, onClose }: TenderDetailProps) {
                 folgende Link führt direkt zum Original auf dem
                 Quellportal.
               </p>
-              {tender.sourceUrl ? (
+              {tender.sources && tender.sources.length > 0 ? (
+                <ul className="mt-2 space-y-1">
+                  {tender.sources.map((source) => (
+                    <li key={`${source.sourcePortal}:${source.sourceNoticeId}`}>
+                      {source.sourceUrl ? (
+                        <a
+                          href={source.sourceUrl}
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          className="inline-block text-sm font-medium text-primary underline underline-offset-2 hover:text-primary/80"
+                        >
+                          {portalLabel(source.sourcePortal)}: Zur Ausschreibung
+                          auf dem Quellportal →
+                        </a>
+                      ) : (
+                        <span className="text-sm text-muted-foreground">
+                          {portalLabel(source.sourcePortal)}: Kein Quell-Link
+                          verfügbar.
+                        </span>
+                      )}
+                    </li>
+                  ))}
+                </ul>
+              ) : tender.sourceUrl ? (
                 <a
                   href={tender.sourceUrl}
                   target="_blank"

apps/web/src/lib/tender-radar-api.ts

@@ -55,6 +55,18 @@ export interface Tender {
   status: string;
   sourceUrl: string | null;
   publishedAt: string;
+  /**
+   * Cross-source-dedup links (13-06, SCHEMA-03, D-03): all TenderSource
+   * rows for this tender, one per portal it was found on. Optional —
+   * only `getTender` (detail) populates it; `listTenders` rows and
+   * older responses may omit it entirely, so callers must fall back to
+   * the single `sourceUrl` field when it's missing/empty.
+   */
+  sources?: {
+    sourcePortal: string;
+    sourceUrl: string | null;
+    sourceNoticeId: string;
+  }[];
 }
 
 /** Response shape of GET /modules/tender-radar. */