Show the streaming dash on dashboard edges and without motion

frontend/src/components/Flow/flow.css

@@ -49,6 +49,15 @@
   --edge-rest: var(--primary);
 }
 
+/*
+ * The dashes are the signal, the march below is only its motion: the pattern
+ * is declared outside the guard so a reduced-motion reader still sees which
+ * edges stream.
+ */
+.react-flow__edge-path.edge-stream {
+  stroke-dasharray: 6 4;
+}
+
 /* A message arriving lights its edge, then decays back to rest. */
 @media (prefers-reduced-motion: no-preference) {
   .react-flow__edge-path.edge-live {
@@ -80,7 +89,6 @@
    * the literal is one dash period per step, slow enough to read as direction.
    */
   .react-flow__edge-path.edge-stream {
-    stroke-dasharray: 6 4;
     animation: edge-march 700ms linear infinite;
   }