feat: 分配视频源后设备卡片显示临时标签，源卡片半透明标记

internal/web/ui/templates/console.html

@@ -277,11 +277,22 @@
     input.name = 'device_' + deviceID + '_source';
     input.value = sourceName;
     row.appendChild(input);
-    // Hide source card
+    // Visual badge on device row
+    var badge = document.createElement('span');
+    badge.className = 'console-source-badge';
+    badge.textContent = sourceName;
+    badge.style.cssText = 'display:inline-block;background:var(--primary-soft);color:var(--primary-strong);padding:1px 6px;border-radius:3px;font-size:10px;margin:2px 4px 2px 0';
+    badge.setAttribute('data-source', sourceName);
+    var header = row.querySelector('.console-header');
+    if (header) header.appendChild(badge);
+    // Mark source card as pending instead of hiding
     var card = document.querySelector('.console-source-assign[data-source="' + sourceName + '"]');
     if (card) {
       var sc = card.closest('.console-source-card');
-      if (sc) sc.style.display = 'none';
+      if (sc) {
+        sc.style.opacity = '0.5';
+        sc.style.borderStyle = 'dashed';
+      }
     }
   }