Fixes critical React crash on the Kanban board view (#830)

* Changes from fix/board-react-crash

* fix: Prevent cascading re-renders and crashes from high-frequency WS events

apps/ui/src/lib/feature-transition-state.ts

@@ -0,0 +1,19 @@
+/**
+ * Lightweight module-level state tracking which features are mid-transition
+ * (e.g., being cancelled). Used by useAutoModeQueryInvalidation to skip
+ * redundant cache invalidations while persistFeatureUpdate is in flight.
+ */
+
+const transitioningFeatures = new Set<string>();
+
+export function markFeatureTransitioning(featureId: string): void {
+  transitioningFeatures.add(featureId);
+}
+
+export function unmarkFeatureTransitioning(featureId: string): void {
+  transitioningFeatures.delete(featureId);
+}
+
+export function isAnyFeatureTransitioning(): boolean {
+  return transitioningFeatures.size > 0;
+}