feat: show import-pending red lozenge when Sonarr/Radarr has issues

- Detect trackedDownloadState=importPending or status=warning/error
- Extract statusMessages and errorMessage from queue records
- Display red 'Import Pending' badge on download card header
- Hover reveals tooltip with the specific issue messages
- Visible to all users (not admin-only)

public/app.js

@@ -384,6 +384,14 @@ function createDownloadCard(download) {
   
   header.appendChild(type);
   header.appendChild(status);
+
+  if (download.importIssues && download.importIssues.length > 0) {
+    const issueBadge = document.createElement('span');
+    issueBadge.className = 'import-issue-badge';
+    issueBadge.textContent = 'Import Pending';
+    issueBadge.setAttribute('data-tooltip', download.importIssues.join('\n'));
+    header.appendChild(issueBadge);
+  }
   
   const title = document.createElement('h3');
   title.className = 'download-title';