Show detailed error information for erroneous documents

- Extract error details from Binect API for documents with status 7
- Display error details in a highlighted box below the status
- Map status 7 (ERRONEOUS) to 'failed' status in refresh handler
- Add CSS styling for error details display

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/popup/popup.ts

@@ -464,6 +464,9 @@ function renderPDFItem(pdf: DocumentProxy, section: 'pending' | 'basket' | 'prod
       break;
   }
 
+  // Show detailed error info for erroneous documents
+  const hasErrorDetails = pdf.binectStatus === 'failed' && pdf.errorMessage && pdf.binectStatusCode === 7;
+
   return `
     <div class="pdf-list-item ${statusClass}" data-id="${escapeHtml(pdf.id)}">
       <div class="pdf-item-icon">${getStatusIcon(pdf.binectStatus)}</div>
@@ -478,6 +481,7 @@ function renderPDFItem(pdf: DocumentProxy, section: 'pending' | 'basket' | 'prod
         </div>
         ${pdf.recipientAddress ? `<div class="pdf-item-recipient">${escapeHtml(pdf.recipientAddress.split('\n')[0])}</div>` : ''}
         <div class="pdf-item-status ${statusClass}">${statusText}</div>
+        ${hasErrorDetails ? `<div class="pdf-item-error">${escapeHtml(pdf.errorMessage!)}</div>` : ''}
       </div>
       <div class="pdf-item-actions">
         ${actionsHtml}
@@ -896,6 +900,8 @@ async function handleRefreshStatus(id: string) {
       newStatus = 'sent';
     } else if (result.status === 6) {
       newStatus = 'canceled';
+    } else if (result.status === 7) {
+      newStatus = 'failed';  // Erroneous
     } else if (result.status === 3 || result.status === 4) {
       newStatus = 'in_production';
     } else if (result.status === 2) {
@@ -906,7 +912,8 @@ async function handleRefreshStatus(id: string) {
       binectStatus: result.status,
       binectStatusText: result.statusText,
       price: result.price,
-      recipientAddress: result.recipientAddress
+      recipientAddress: result.recipientAddress,
+      errorMessage: result.errorDetails
     };
 
     // Update in background
@@ -923,6 +930,7 @@ async function handleRefreshStatus(id: string) {
     pdf.binectStatusText = result.statusText;
     if (result.price) pdf.price = result.price;
     if (result.recipientAddress) pdf.recipientAddress = result.recipientAddress;
+    if (result.errorDetails) pdf.errorMessage = result.errorDetails;
     renderPDFList();
 
   } catch (error) {