feat: blocklist & search button for import-pending downloads with caution

- Poller now stores _instanceKey alongside _instanceUrl on Sonarr/Radarr queue records
- dashboard route threads arrQueueId/arrType/arrInstanceUrl/arrInstanceKey/arrContentId/arrContentType as admin-only fields on downloads with importIssues
- POST /api/dashboard/blocklist-search: admin-only, removes queue item with blocklist=true then triggers EpisodeSearch/MoviesSearch
- Button renders in download card header (admin + importIssues + arrQueueId only)
- Confirm dialog, loading/success/error states on the button
- Kicks a background poll on success so SSE reflects removed item promptly

public/app.js

@@ -457,6 +457,49 @@ function updateDownloadCard(card, download) {
   }
 }
 
+async function handleBlocklistSearch(btn, download) {
+  if (!confirm(`Blocklist "${download.title}" and trigger a new search?\n\nThis will:\n• Remove the download from the download client\n• Add this release to the blocklist\n• Trigger an automatic search for a new release`)) return;
+
+  btn.disabled = true;
+  btn.textContent = '⏳ Working…';
+
+  try {
+    const res = await fetch('/api/dashboard/blocklist-search', {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'X-CSRF-Token': csrfToken
+      },
+      body: JSON.stringify({
+        arrQueueId: download.arrQueueId,
+        arrType: download.arrType,
+        arrInstanceUrl: download.arrInstanceUrl,
+        arrInstanceKey: download.arrInstanceKey,
+        arrContentId: download.arrContentId,
+        arrContentType: download.arrContentType
+      })
+    });
+
+    if (!res.ok) {
+      const data = await res.json().catch(() => ({}));
+      throw new Error(data.error || `HTTP ${res.status}`);
+    }
+
+    btn.textContent = '✓ Done — searching…';
+    btn.className = 'blocklist-search-btn success';
+  } catch (err) {
+    console.error('[Blocklist] Error:', err);
+    btn.disabled = false;
+    btn.textContent = '⛔ Blocklist & Search';
+    btn.className = 'blocklist-search-btn error';
+    btn.title = `Failed: ${err.message}`;
+    setTimeout(() => {
+      btn.className = 'blocklist-search-btn';
+      btn.title = 'Remove this release from the download client, add it to the blocklist, and trigger a new automatic search';
+    }, 4000);
+  }
+}
+
 function createDownloadCard(download) {
   const card = document.createElement('div');
   card.className = `download-card ${download.type}`;
@@ -511,6 +554,15 @@ function createDownloadCard(download) {
     issueBadge.textContent = 'Import Pending';
     issueBadge.setAttribute('data-tooltip', download.importIssues.join('\n'));
     header.appendChild(issueBadge);
+
+    if (isAdmin && download.arrQueueId) {
+      const blBtn = document.createElement('button');
+      blBtn.className = 'blocklist-search-btn';
+      blBtn.textContent = '⛔ Blocklist & Search';
+      blBtn.title = 'Remove this release from the download client, add it to the blocklist, and trigger a new automatic search';
+      blBtn.addEventListener('click', () => handleBlocklistSearch(blBtn, download));
+      header.appendChild(blBtn);
+    }
   }
   
   const title = document.createElement('h3');

public/style.css

@@ -1151,6 +1151,39 @@ body {
   pointer-events: none;
 }
 
+.blocklist-search-btn {
+  font-size: 0.68rem;
+  font-weight: 600;
+  padding: 2px 8px;
+  border-radius: 10px;
+  border: 1px solid var(--error, #e74c3c);
+  background: transparent;
+  color: var(--error, #e74c3c);
+  cursor: pointer;
+  white-space: nowrap;
+  transition: background 0.15s, color 0.15s;
+}
+
+.blocklist-search-btn:hover:not(:disabled) {
+  background: var(--error, #e74c3c);
+  color: #fff;
+}
+
+.blocklist-search-btn:disabled {
+  opacity: 0.6;
+  cursor: default;
+}
+
+.blocklist-search-btn.success {
+  border-color: var(--success, #27ae60);
+  color: var(--success, #27ae60);
+}
+
+.blocklist-search-btn.error {
+  background: var(--error, #e74c3c);
+  color: #fff;
+}
+
 .download-user-badge {
   padding: 2px 8px;
   border-radius: 10px;