feat: release design system engine, studio and component contracts

output/design-system-phase-4/application-demo/README.md

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+# Studio application demo
+
+This folder is a local verification target for Phase 4 apply/rollback. No existing application configuration is edited. Generated revisions are under .wrnexus/design-studio.

output/design-system-phase-4/browser-checks.json

@@ -0,0 +1,64 @@
+{
+  "presets": [
+    {
+      "bodyFont": "\"IBM Plex Mono\", \"Courier New\", monospace",
+      "overflow": false,
+      "radius": "0px",
+      "theme": "light",
+      "title": "Square / Industrial preview"
+    },
+    {
+      "bodyFont": "\"IBM Plex Mono\", \"Courier New\", monospace",
+      "overflow": false,
+      "radius": "0px",
+      "theme": "dark",
+      "title": "Square / Industrial preview"
+    },
+    {
+      "bodyFont": "Georgia, serif",
+      "overflow": false,
+      "radius": "16px",
+      "theme": "light",
+      "title": "Soft / Organic preview"
+    },
+    {
+      "bodyFont": "Georgia, serif",
+      "overflow": false,
+      "radius": "16px",
+      "theme": "dark",
+      "title": "Soft / Organic preview"
+    },
+    {
+      "bodyFont": "Arial, sans-serif",
+      "overflow": false,
+      "radius": "0px",
+      "theme": "light",
+      "title": "Angular / Lo-Fi preview"
+    },
+    {
+      "bodyFont": "Arial, sans-serif",
+      "overflow": false,
+      "radius": "0px",
+      "theme": "dark",
+      "title": "Angular / Lo-Fi preview"
+    }
+  ],
+  "narrowFrame": {
+    "overflow": false,
+    "width": 390
+  },
+  "interactions": [
+    "token save",
+    "recipe default",
+    "invalid draft/reload/undo",
+    "import fidelity",
+    "apply and rollback",
+    "switch",
+    "InputNumber",
+    "dialog"
+  ],
+  "shellViewport": {
+    "measuredWidth": 1280,
+    "overrideApplied": false
+  }
+}