Adding visual return when error

src/components/workflows/assets/Workflows.css

@@ -98,6 +98,7 @@
     background: var(--color-error);
 }
 
+
 .wkf-component-content {
   padding: 0.75rem;           /* p-3 in Tailwind */
   border-radius: 0.5rem;      /* rounded-lg in Tailwind */
@@ -108,6 +109,13 @@
   align-items: center;        /* items-center in Tailwind */
 }
 
+.wkf-component-content.error {
+  background: var(--color-error);
+}
+
+.wkf-component-content.not-run {
+  background: var(--color-neutral);
+}
 
 .wkf-connection-line {
   position: absolute;