完善导检单显示

src/components/exam/ExamPrintPanel.tsx

@@ -87,10 +87,36 @@ export const ExamPrintPanel = ({ client }: { client: ExamClient }) => {
     }
   };
 
-  // 组件加载时检查localStorage，如果有则直接展示
+  // 组件加载时自动获取导检单（未签名版本也可以查看）
   useEffect(() => {
     const examId = Number(client.id);
     if (!examId) return;
+
+    // 自动加载未签名的导检单用于查看
+    const fetchPdf = async () => {
+      setFetchLoading(true);
+      setError(null);
+
+      try {
+        const res = await getDaojiandanPdfApi({ exam_id: examId });
+        if (res.Status === 200 && res.Data?.pdf_url) {
+          const pdfUrlValue = res.Data.pdf_url;
+          console.log('获取到导检单PDF URL:', pdfUrlValue);
+          setPdfUrl(pdfUrlValue);
+          setShowPreview(true);
+        } else {
+          console.error('获取导检单失败，响应:', res);
+          setError(res.Message || '获取导检单失败');
+        }
+      } catch (err) {
+        console.error('获取导检单失败', err);
+        setError('获取导检单失败，请稍后重试');
+      } finally {
+        setFetchLoading(false);
+      }
+    };
+
+    fetchPdf();
   }, [client.id]);
 
   // 获取导检单PDF（优先使用localStorage，没有则调用接口）
@@ -389,10 +415,6 @@ export const ExamPrintPanel = ({ client }: { client: ExamClient }) => {
           <div className='flex items-center justify-center py-12 text-gray-500'>
             <div>正在加载导检单...</div>
           </div>
-        ) : loading ? (
-          <div className='flex items-center justify-center py-12 text-gray-500'>
-            <div>正在加载PDF...</div>
-          </div>
         ) : error ? (
           <div className='flex flex-col items-center justify-center py-12 text-gray-500'>
             <div className='mb-2'>{error}</div>
@@ -421,6 +443,10 @@ export const ExamPrintPanel = ({ client }: { client: ExamClient }) => {
               </Button>
             )}
           </div>
+        ) : loading ? (
+          <div className='flex items-center justify-center py-12 text-gray-500'>
+            <div>正在加载PDF...</div>
+          </div>
         ) : pdfUrl ? (
           <div className='w-full'>
             <div ref={printRef} className='print-content'>
@@ -429,6 +455,10 @@ export const ExamPrintPanel = ({ client }: { client: ExamClient }) => {
               </div>
             </div>
           </div>
+        ) : showPreview ? (
+          <div className='flex items-center justify-center py-12 text-gray-500'>
+            <div>正在准备导检单...</div>
+          </div>
         ) : null}
       </div>
     </div>