feat(KnowledgeManagement): 保留知识集原始字段信息

- 在更新标签时保持知识集的名称、描述、状态等核心属性
- 保留领域、业务线、负责人等元数据信息
- 维护有效期、敏感度等配置项
- 确保源类型和自定义元数据字段不被覆盖
- 防止更新标签操作意外丢失其他重要字段值

frontend/src/pages/KnowledgeManagement/Detail/KnowledgeSetDetail.tsx

@@ -934,6 +934,17 @@ const KnowledgeSetDetail = () => {
             if (res.data && knowledgeSet) {
               const currentTags = knowledgeSet.tags || [];
               await updateKnowledgeSetByIdUsingPut(knowledgeSet.id, {
+                name: knowledgeSet.name,
+                description: knowledgeSet.description,
+                status: knowledgeSet.status,
+                domain: knowledgeSet.domain,
+                businessLine: knowledgeSet.businessLine,
+                owner: knowledgeSet.owner,
+                validFrom: knowledgeSet.validFrom,
+                validTo: knowledgeSet.validTo,
+                sourceType: knowledgeSet.sourceType,
+                sensitivity: knowledgeSet.sensitivity,
+                metadata: knowledgeSet.metadata,
                 tags: [...currentTags.map((tag) => tag.name), res.data.name],
               });
               fetchKnowledgeSet();
@@ -945,6 +956,17 @@ const KnowledgeSetDetail = () => {
               const newTagName = typeof tag === "string" ? tag : tag?.name;
               if (!newTagName) return;
               await updateKnowledgeSetByIdUsingPut(knowledgeSet.id, {
+                name: knowledgeSet.name,
+                description: knowledgeSet.description,
+                status: knowledgeSet.status,
+                domain: knowledgeSet.domain,
+                businessLine: knowledgeSet.businessLine,
+                owner: knowledgeSet.owner,
+                validFrom: knowledgeSet.validFrom,
+                validTo: knowledgeSet.validTo,
+                sourceType: knowledgeSet.sourceType,
+                sensitivity: knowledgeSet.sensitivity,
+                metadata: knowledgeSet.metadata,
                 tags: [...currentTags.map((tag) => tag.name), newTagName],
               });
               fetchKnowledgeSet();