feat: release design system engine, studio and component contracts

packages/ui/component-catalog.json

@@ -181,6 +181,11 @@
       "category": "overlays",
       "purpose": "Present responsive modal side or bottom content with focus management, backdrop behavior, slots, and close events."
     },
+    {
+      "name": "DrawflowCanvas",
+      "category": "core",
+      "purpose": "Reusable drawflow canvas component."
+    },
     {
       "name": "Dropdown",
       "category": "overlays",
@@ -211,6 +216,11 @@
       "category": "base",
       "purpose": "Theme-aware, responsive file upload progress component."
     },
+    {
+      "name": "FlowCanvas",
+      "category": "core",
+      "purpose": "Reusable flow canvas component."
+    },
     {
       "name": "Footer",
       "category": "layout",