fix(release): stabilize generated UI references

scripts/validate-0.6.mjs

@@ -416,11 +416,34 @@ for (const [label, condition] of [
       referenceGeneratorSource.includes("compareText(left.name, right.name)") &&
       !referenceGeneratorSource.includes("localeCompare"),
   ],
+  [
+    "line-ending-stable generated reference writes",
+    referenceGeneratorSource.includes("function normalizeNewlines(source)") &&
+      referenceGeneratorSource.includes(
+        "normalizeNewlines(current) === normalizeNewlines(source)",
+      ) &&
+      referenceGeneratorSource.includes("return false"),
+  ],
 ]) {
-  if (!condition) fail(`R12 regression: missing ${label}`);
+  if (!condition) fail(`R13 regression: missing ${label}`);
 }
-if (!failures.some((item) => item.startsWith("R12 regression:"))) {
-  pass("R12 release reference gate is canonical, complete, and platform independent");
+if (!failures.some((item) => item.startsWith("R13 regression:"))) {
+  const referenceGenerationTest = spawnSync(
+    process.execPath,
+    [join(root, "scripts/test-ui-reference-generation.mjs")],
+    { encoding: "utf8" },
+  );
+  if (referenceGenerationTest.status !== 0) {
+    fail(
+      `R13 regression: generated-reference line-ending test failed: ${
+        referenceGenerationTest.stderr.trim() || referenceGenerationTest.stdout.trim()
+      }`,
+    );
+  } else {
+    pass(
+      "R13 release reference gate is canonical, complete, platform independent, and line-ending stable",
+    );
+  }
 }
 
 const showcaseFiles = walk(join(root, "examples/component-showcase/app"), (path) =>