fix(showcase): reorder legend — L1-L4 first, add D3, remove D0-D4 (CopilotKit#4540)

Legend now reads: L1-L4 Strip, D2 API, D3 Page Load, D4 Round Trip, D5
Conversation, then indicators.

Author: jpr5

showcase/shell-dashboard/src/components/adaptive-legend.tsx

@@ -39,26 +39,26 @@ function LinksLegend() {
 function DepthLegend() {
   return (
     <LegendItem>
-      <span className="font-semibold text-[var(--text-secondary)]">D0-D4</span>
-      integration wiring depth (D0 = listed, D4 = full tool rendering)
+      <span className="font-semibold text-[var(--text-secondary)]">
+        L1-L4 Strip
+      </span>
+      per-integration health levels shown in column header
     </LegendItem>
   );
 }
 
 function HealthLegend() {
   return (
     <>
-      {/* Depth/level explanations grouped first */}
-      <LegendItem>
-        <span className="font-semibold text-[var(--text-secondary)]">
-          L1-L4 Strip
-        </span>
-        per-integration health levels shown in column header
-      </LegendItem>
+      {/* Depth explanations in ascending order */}
       <LegendItem>
         <span className="font-semibold text-[var(--text-secondary)]">D2</span>
         API: responds to a basic CopilotKit API call
       </LegendItem>
+      <LegendItem>
+        <span className="font-semibold text-[var(--text-secondary)]">D3</span>
+        Page Load: demo page loads in a browser
+      </LegendItem>
       <LegendItem>
         <span className="font-semibold text-[var(--text-secondary)]">D4</span>
         Round Trip (RT): single message, full-stack response verification