feat(11-01): replace tender-radar placeholder with real results UI (GREEN)

Replaces the Phase 10 module stub with a Master-Container page.tsx
(Suspense-wrapped for useSearchParams, Next 16 App Router) rendering
CoverageBanner + FilterPanel + ResultsList.

- ResultsList: URL-param-driven fetch via listTenders(), sortable
  Frist/Wert/Veröffentlicht column headers, "keine Wertangabe" for
  estimatedValue=null rows (D-05), pagination.
- FilterPanel: Freitext (q), Sortierung, "nur noch offene" toggle
  (openOnly, default on), Abgabefrist von/bis date inputs — param names
  match the TenderQueryDto field names 1:1 for the Plan 11-06
  Saved-Search serialization contract.
- CoverageBanner: German coverage hint shown while GET /coverage
  reports only the doe-opendata source (D-12, UI-05).

All strings hardcoded German (i18n = Phase 14). Plain fetch throughout,
no TanStack Query (not installed, per RESEARCH Open Question 4).

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

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

@@ -1,31 +1,53 @@
 'use client';
 
+import { Suspense } from 'react';
+import { CoverageBanner } from './components/CoverageBanner';
+import { FilterPanel } from './components/FilterPanel';
+import { ResultsList } from './components/ResultsList';
+
 /**
  * Ausschreibungs-Radar module page within the portal.
  *
- * MVP stub (Plan 10-02, CONFIG-01): proves the activation -> page-load
- * path (marketplace seed -> module-loader whitelist -> lazy-loaded
- * page). Real results UI (search, filters, tender list) lands in
- * Phase 11.
+ * Replaces the Phase 10 placeholder (CONFIG-01 MVP stub) with the real
+ * Trefferliste (Plan 11-01): CoverageBanner explains data coverage,
+ * FilterPanel writes filter/sort state into the URL, ResultsList reads it
+ * and renders the ~1671 existing DÖE tenders.
  *
- * Intentional hardcoded German string: full i18n (next-intl message
- * keys) is CONFIG-03, planned for Phase 14. Do not add a translation
- * key for this stub yet — replace this whole component in Phase 11.
+ * `useSearchParams()` (used by FilterPanel/ResultsList) requires a
+ * Suspense boundary per the Next.js App Router contract — wrapped here
+ * even though this component is loaded via `dynamic(..., { ssr: false })`
+ * (module-loader.ts), per the plan's explicit Next 16 guidance.
+ *
+ * Intentional hardcoded German strings: full i18n (next-intl message
+ * keys) is CONFIG-03, planned for Phase 14 (Research Open Question 3,
+ * RESOLVED).
  */
-export default function TenderRadarPage() {
+function TenderRadarContent() {
   return (
-    <div className="mx-auto max-w-2xl space-y-6 p-6">
+    <div className="mx-auto max-w-5xl space-y-6 p-6">
       <div>
         <h1 className="text-2xl font-bold tracking-tight">
           Ausschreibungs-Radar
         </h1>
       </div>
 
-      <div className="rounded-lg border border-border bg-card p-6 shadow-sm">
-        <p className="text-sm text-muted-foreground">
-          Ausschreibungen werden erfasst.
-        </p>
-      </div>
+      <CoverageBanner />
+      <FilterPanel />
+      <ResultsList />
     </div>
   );
 }
+
+export default function TenderRadarPage() {
+  return (
+    <Suspense
+      fallback={
+        <div className="mx-auto max-w-5xl space-y-6 p-6">
+          <p className="text-sm text-muted-foreground">Lädt…</p>
+        </div>
+      }
+    >
+      <TenderRadarContent />
+    </Suspense>
+  );
+}