b55bb55c0e
Extends tender-radar-api.ts with the Tender type, listTenders(params) and fetchCoverage() (plain fetch, credentials:'include', matching the established fetchSourceConfig pattern — TanStack Query is not installed). Adds the RED-first ResultsList.test.tsx: render items with title/buyerName/deadline/value, "keine Wertangabe" for null estimatedValue (D-05), and an empty-state message. ResultsList.tsx does not exist yet. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>