Auto-on live preview when recount starts (all recounting templates)

templates/recounting_lamborghini.html

@@ -405,6 +405,7 @@ function applyState(data) {
     document.getElementById('video-status').innerHTML =
       '<span style="width:5px;height:5px;background:var(--success);display:inline-block;"></span> streaming ' + (data.file_name || '');
     document.getElementById('video-status').className = 'video-status connected';
+    enablePreview();
 
     loadBatchResult(data.file);
   } else if (data.file && selectedFile === data.file) {
@@ -595,6 +596,7 @@ async function startRecount() {
     document.getElementById('video-status').innerHTML =
       '<span style="width:5px;height:5px;background:var(--success);display:inline-block;"></span> streaming ' + data.file;
     document.getElementById('video-status').className = 'video-status connected';
+    enablePreview();
   } catch (err) {
     alert('Error: ' + err.message);
     btnStart.disabled = false;
@@ -655,11 +657,7 @@ function togglePreview() {
     btn.textContent = 'STREAM OFF';
     btn.classList.remove('active');
   } else {
-    img.src = streamUrl + '?' + Date.now();
-    img.style.display = 'block';
-    if (placeholder) placeholder.style.display = 'none';
-    btn.textContent = 'STREAM ON';
-    btn.classList.add('active');
+    enablePreview();
   }
 }
 
@@ -674,6 +672,23 @@ function resetVideoToggle() {
   btn.classList.remove('active');
 }
 
+function enablePreview() {
+  const btn = document.getElementById('videoToggle');
+  const img = document.getElementById('stream-img');
+  const placeholder = document.getElementById('video-placeholder');
+  if (!streamUrl) return;
+  img.onerror = function() {
+    if (streaming && streamUrl) {
+      img.src = streamUrl + '?' + Date.now();
+    }
+  };
+  img.src = streamUrl + '?' + Date.now();
+  img.style.display = 'block';
+  if (placeholder) placeholder.style.display = 'none';
+  btn.textContent = 'STREAM ON';
+  btn.classList.add('active');
+}
+
 // --- Recount counter ---
 
 let lastRecountCount = null;