refactor(KnowledgeManagement): 优化知识集详情页面文件记录渲染逻辑

- 将重复的条件判断提取为变量 isFileRecord
- 使用立即执行函数简化 JSX 结构
- 统一文件类型记录的操作按钮渲染方式
- 提高代码可读性和维护性

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

@@ -335,41 +335,54 @@ const KnowledgeSetDetail = () => {
               />
             </Tooltip>
           )}
-          {(record.contentType === KnowledgeContentType.FILE ||
+          {(() => {
-            record.sourceType === KnowledgeSourceType.FILE_UPLOAD) && (
+            const isFileRecord =
-            <Tooltip title="预览">
+              record.contentType === KnowledgeContentType.FILE ||
-              <Button
+              record.sourceType === KnowledgeSourceType.FILE_UPLOAD;
-                type="text"
+            return (
-                icon={<EyeOutlined />}
+              <>
-                onClick={() => handlePreviewItemFile(record)}
+                {isFileRecord && (
-                loading={previewLoadingItemId === record.id}
+                  <Tooltip title="预览">
-                aria-label="预览"
+                    <Button
-              />
+                      type="text"
-            </Tooltip>
+                      icon={<EyeOutlined />}
-          )}
+                      onClick={() => handlePreviewItemFile(record)}
-          {(record.contentType === KnowledgeContentType.FILE ||
+                      loading={previewLoadingItemId === record.id}
-            record.sourceType === KnowledgeSourceType.FILE_UPLOAD) && (
+                      aria-label="预览"
-            <Tooltip title="下载文件">
+                    />
-              <Button
+                  </Tooltip>
-                type="text"
+                )}
-                icon={<DownloadOutlined />}
+                {isFileRecord && (
-                onClick={() => handleDownloadItem(record)}
+                  <Tooltip title="下载文件">
-                aria-label="下载文件"
+                    <Button
-              />
+                      type="text"
-            </Tooltip>
+                      icon={<DownloadOutlined />}
-          )}
+                      onClick={() => handleDownloadItem(record)}
-          <Button
+                      aria-label="下载文件"
-            type="text"
+                    />
-            icon={<EditOutlined />}
+                  </Tooltip>
-            onClick={() => {
+                )}
-              setCurrentItem({
+                {isFileRecord && (
-                ...(record as unknown as KnowledgeItem),
+                  <Button
-                status: record.rawStatus,
+                    type="text"
-              });
+                    icon={<EditOutlined />}
-              setItemEditorOpen(true);
+                    onClick={() => {
-            }}
+                      setCurrentItem({
-            disabled={isReadOnly || record.rawStatus === KnowledgeStatusType.ARCHIVED || record.rawStatus === KnowledgeStatusType.DEPRECATED}
+                        ...(record as unknown as KnowledgeItem),
-          />
+                        status: record.rawStatus,
+                      });
+                      setItemEditorOpen(true);
+                    }}
+                    disabled={
+                      isReadOnly ||
+                      record.rawStatus === KnowledgeStatusType.ARCHIVED ||
+                      record.rawStatus === KnowledgeStatusType.DEPRECATED
+                    }
+                  />
+                )}
+              </>
+            );
+          })()}
           <Button
             type="text"
             danger