test: prove TechLog UI migration parity

scripts/check-design-system.ts

@@ -2,6 +2,7 @@ import { mkdir, readFile, readdir } from "node:fs/promises";
 
 import { designSystemReportArtifactSchema } from "./contracts/release-artifacts.ts";
 import { writeValidatedJsonArtifact } from "./lib/validated-json-artifact.ts";
+import { containsRawPaletteValue } from "./lib/design-system-source.ts";
 import path from "node:path";
 
 import { REQUIRED_COMPONENT_TOKENS, REQUIRED_PRIMITIVE_TOKENS, REQUIRED_SEMANTIC_TOKENS } from "../src/presentation/design-system/tokens/token-contract.ts";
@@ -109,7 +110,7 @@ for (const file of sources) {
   }
   if (
     !file.includes("src/presentation/design-system/tokens/") &&
-    /(?:#[0-9a-f]{3,8}\b|oklch\(|rgba?\()/i.test(source)
+    containsRawPaletteValue(source)
   ) {
     failures.push(`raw palette value in ${file}`);
   }