KC test uses shared LiveStreamManager, tree-nav dropdown, KC card badge fix

- KC test WS now acquires from LiveStreamManager instead of creating its
  own DXGI duplicator, eliminating capture contention with running LED targets
- Tree-nav refactored to compact dropdown on click with outside-click dismiss
  (closes on click outside the trigger+panel, not just outside the container)
- KC target card badge (e.g. "Daylight Cycle") no longer wastes empty space

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/wled_controller/static/css/patterns.css

@@ -36,6 +36,7 @@
 .stream-card-props {
     display: flex;
     flex-wrap: wrap;
+    align-items: flex-start;
     gap: 6px;
     margin-bottom: 8px;
 }
@@ -59,7 +60,7 @@
 }
 
 .stream-card-prop-full {
-    flex: 1 1 100%;
+    max-width: 100%;
     min-width: 0;
     white-space: nowrap;
     overflow: hidden;