Add a dev-only kitchen simulation to the order status page

- "Simulate kitchen (dev)" button advances each placed/paid item's
  Preparation Steps as a Machine would, polling fresh status per item
- Each simulated step takes 10–30s, scaled from its estimated duration
- Timeline connector fills in with a Framer Motion animation when a
  step completes; finished steps and the line now use the success green

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/orders/OrderStatusView.module.scss

@@ -55,6 +55,28 @@
   font-size: 0.85rem;
 }
 
+.simulateButton {
+  margin: 0 0 $space-4;
+  padding: $space-1 $space-3;
+  border: 1px dashed $color-text-muted;
+  border-radius: $radius;
+  background: none;
+  color: $color-text-muted;
+  font-size: 0.85rem;
+  cursor: pointer;
+  transition: border-color 0.15s ease, color 0.15s ease;
+
+  &:hover:not(:disabled) {
+    border-color: $color-primary;
+    color: $color-primary;
+  }
+
+  &:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+  }
+}
+
 .error {
   color: $color-danger;
 }
@@ -130,8 +152,7 @@
   z-index: 1;
 }
 
-.stepMarker::after {
-  content: '';
+.stepConnector {
   position: absolute;
   top: 15px;
   bottom: -$space-3;
@@ -139,9 +160,17 @@
   width: 2px;
   background: $color-border;
   transform: translateX(-50%);
+  overflow: hidden;
 }
 
-.step:last-child .stepMarker::after {
+.stepConnectorFill {
+  position: absolute;
+  inset: 0;
+  background: $color-success;
+  transform-origin: top;
+}
+
+.step:last-child .stepConnector {
   display: none;
 }
 
@@ -158,12 +187,8 @@
 
 .step[data-status='done'] {
   .stepDot {
-    border-color: $color-primary;
-    background: $color-primary;
-  }
-
-  .stepMarker::after {
-    background: $color-primary;
+    border-color: $color-success;
+    background: $color-success;
   }
 
   .stepLabel {