diff --git a/frontend/src/app/knowledge-bases/page.tsx b/frontend/src/app/knowledge-bases/page.tsx
index 2e88e992..9b346f48 100644
--- a/frontend/src/app/knowledge-bases/page.tsx
+++ b/frontend/src/app/knowledge-bases/page.tsx
@@ -58,6 +58,12 @@ const { Title, Text, Paragraph } = Typography;
 type KnowledgeBaseFormValues = {
   name: string;
   description?: string;
+  note?: string;
+  source_type?: string;
+  authority?: string;
+  effective_date?: string;
+  region?: string;
+  tags?: string;
 };
 
 type KnowledgeBaseRollbackFormValues = {
@@ -843,9 +849,9 @@ export default function KnowledgeBasesPage() {
                             ) : document.failure_reason ? (
                               <Text type="danger" style={{ fontSize: 12 }}>{document.failure_reason}</Text>
                             ) : null}
-                            {document.tags?.length > 0 && (
+                            {(document.tags?.length ?? 0) > 0 && (
                               <Space wrap size={[4, 4]} style={{ marginTop: 4 }}>
-                                {document.tags.slice(0, 5).map((tag) => <Tag key={tag} style={{ fontSize: 11 }}>{tag}</Tag>)}
+                                {(document.tags ?? []).slice(0, 5).map((tag) => <Tag key={tag} style={{ fontSize: 11 }}>{tag}</Tag>)}
                               </Space>
                             )}
                           </div>
@@ -1035,7 +1041,8 @@ export default function KnowledgeBasesPage() {
 }
 
 // Helper function for rendering status tags inline
-function renderStatusTag(value: string, metaMap: Record<string, { color: string; label: string }>) {
-  const meta = metaMap[value] ?? { color: "default", label: value || "未知" };
+function renderStatusTag(value: string | null | undefined, metaMap: Record<string, { color: string; label: string }>) {
+  if (!value) return <Tag color="default">未知</Tag>;
+  const meta = metaMap[value] ?? { color: "default", label: value };
   return <Tag color={meta.color}>{meta.label}</Tag>;
 }
diff --git a/frontend/src/app/legal-articles/page.tsx b/frontend/src/app/legal-articles/page.tsx
index 11564957..d636efd0 100644
--- a/frontend/src/app/legal-articles/page.tsx
+++ b/frontend/src/app/legal-articles/page.tsx
@@ -92,8 +92,9 @@ function formatHash(value: string | null | undefined) {
   return value ? `${value.slice(0, 12)}...` : "-";
 }
 
-function renderStatusTag(value: string, metaMap: Record<string, { color: string; label: string }>) {
-  const meta = metaMap[value] ?? { color: "default", label: value || "未知" };
+function renderStatusTag(value: string | null | undefined, metaMap: Record<string, { color: string; label: string }>) {
+  if (!value) return <Tag color="default">未知</Tag>;
+  const meta = metaMap[value] ?? { color: "default", label: value };
   return <Tag color={meta.color}>{meta.label}</Tag>;
 }
 
@@ -407,7 +408,7 @@ export default function LegalArticlesPage() {
                       description={item.content ? <Paragraph ellipsis={{ rows: 2 }}>{item.content}</Paragraph> : null}
                     />
                     {item.source_id && (
-                      <Button disabled={!item.source_id} icon={<EyeOutlined />} size="small" onClick={() => void openArticleDetail(item.source_id)}>
+                      <Button disabled={!item.source_id} icon={<EyeOutlined />} size="small" onClick={() => void openArticleDetail(item.source_id!)}>
                         查看
                       </Button>
                     )}