fix(frontend): errorCode 统一自 generation/cards 去重复定义（CR-H10）

apps/web/lib/style/errorCode-dedup.test.ts

@@ -0,0 +1,19 @@
+import { readFileSync } from "node:fs";
+
+import { describe, expect, it } from "vitest";
+
+// CR-H10 回归守卫：errorCode 只应有一份权威实现（lib/generation/cards），
+// style 侧两个 hook 不得再各自本地定义 `function errorCode(`，须统一 import。
+describe("errorCode 去重（CR-H10）", () => {
+  it.each(["useRefine.ts", "useStyleLearn.ts"])(
+    "%s 不再本地定义 errorCode，且从 generation/cards 引入",
+    (file) => {
+      const src = readFileSync(new URL(`./${file}`, import.meta.url), "utf-8");
+
+      expect(src).not.toMatch(/function\s+errorCode\s*\(/);
+      expect(src).toMatch(
+        /import\s*\{[^}]*\berrorCode\b[^}]*\}\s*from\s*["']@\/lib\/generation\/cards["']/,
+      );
+    },
+  );
+});