fix: 第3轮调试Bug修复 (P1: 弱随机+crypto/rand, Knowledge键对齐; P2: 简报created_at, CORS+安全头)

frontend/web/src/components/layout/KnowledgePanel.tsx

@@ -178,7 +178,7 @@ export function KnowledgePanel({ onClose }: KnowledgePanelProps) {
     setSearchErr('');
     try {
       const res = await searchKnowledge(searchQuery.trim());
-      setSearchResults(res.results);
+      setSearchResults(res.chunks);
       setSearchTotal(res.total);
     } catch (e: any) {
       setSearchErr(e.message || '搜索失败');