refactor: 存储优化

Former-commit-id: 6a051fac3c80be339c1eb01780e12334ad888551

src/utils/auth.ts

@@ -0,0 +1,15 @@
+import Cookies from 'js-cookie';
+
+const TokenKey = 'vue3-element-admin-token';
+
+export function getToken() {
+  return Cookies.get(TokenKey);
+}
+
+export function setToken(token: string) {
+  Cookies.set(TokenKey, token);
+}
+
+export function removeToken() {
+  return Cookies.remove(TokenKey);
+}