refactor(frontend): extract reusable hooks and page helper modules

vite-frontend/src/api/error-message.ts

@@ -0,0 +1,27 @@
+import axios from "axios";
+
+interface ErrorPayload {
+  msg?: string;
+  message?: string;
+}
+
+export const isUnauthorizedError = (error: unknown): boolean => {
+  return axios.isAxiosError(error) && error.response?.status === 401;
+};
+
+export const extractApiErrorMessage = (
+  error: unknown,
+  fallback = "网络请求失败",
+): string => {
+  if (axios.isAxiosError(error)) {
+    const payload = error.response?.data as ErrorPayload | undefined;
+
+    return payload?.msg || payload?.message || error.message || fallback;
+  }
+
+  if (error instanceof Error && error.message) {
+    return error.message;
+  }
+
+  return fallback;
+};