chore(ui): add enterprise ui contract checks

frontend/package.json

@@ -7,7 +7,8 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
-    "type-check": "vue-tsc --noEmit"
+    "type-check": "vue-tsc --noEmit",
+    "ui:contract": "node scripts/verify-ui-contract.mjs"
   },
   "dependencies": {
     "axios": "^1.6.8",

frontend/scripts/verify-ui-contract.mjs

@@ -0,0 +1,31 @@
+import { readFileSync } from "node:fs";
+
+const main = readFileSync("src/styles/main.css", "utf8");
+const unified = readFileSync("src/styles/unified-page.css", "utf8");
+
+const requiredMainTokens = [
+  "--ctms-primary",
+  "--ctms-text-main",
+  "--ctms-bg-base",
+  "--ctms-radius",
+  "--ctms-shadow"
+];
+
+const requiredUnifiedTokens = [
+  "--unified-shell-bg",
+  "--unified-shell-radius",
+  ".unified-action-bar",
+  ".unified-section"
+];
+
+const missing = [
+  ...requiredMainTokens.filter((t) => !main.includes(t)),
+  ...requiredUnifiedTokens.filter((t) => !unified.includes(t))
+];
+
+if (missing.length) {
+  console.error("UI contract check failed. Missing:", missing.join(", "));
+  process.exit(1);
+}
+
+console.log("UI contract check passed");