feat(tui): Stock-Suche mit Namensanzeige für Bestände

StockPicker-Komponente für Bestandssuche nach Artikel-/Lagerort-Namen.
StockBatchEntryScreen nutzt StockPicker statt manueller UUID-Eingabe.
StockListScreen mit Suchfilter [s] und Namensanzeige statt IDs.
StockDetailScreen zeigt Artikel-/Lagerort-Namen im Header.

frontend/apps/cli/src/hooks/useStockNameLookup.ts

@@ -0,0 +1,37 @@
+import { useEffect, useMemo, useCallback } from 'react';
+import { useArticles } from './useArticles.js';
+import { useStorageLocations } from './useStorageLocations.js';
+
+export function useStockNameLookup() {
+  const { articles, fetchArticles } = useArticles();
+  const { storageLocations, fetchStorageLocations } = useStorageLocations();
+
+  useEffect(() => {
+    void fetchArticles();
+    void fetchStorageLocations();
+  }, [fetchArticles, fetchStorageLocations]);
+
+  const articleNames = useMemo(() => {
+    const map = new Map<string, string>();
+    for (const a of articles) map.set(a.id, a.name);
+    return map;
+  }, [articles]);
+
+  const locationNames = useMemo(() => {
+    const map = new Map<string, string>();
+    for (const l of storageLocations) map.set(l.id, l.name);
+    return map;
+  }, [storageLocations]);
+
+  const articleName = useCallback(
+    (id: string) => articleNames.get(id) ?? id.substring(0, 8) + '…',
+    [articleNames],
+  );
+
+  const locationName = useCallback(
+    (id: string) => locationNames.get(id) ?? id.substring(0, 8) + '…',
+    [locationNames],
+  );
+
+  return { articleName, locationName };
+}