fix:注册提示

apps/frontend/src/features/auth/pages/RegisterPage.vue

@@ -34,6 +34,15 @@ const submit = async () => {
     return;
   }
 
+  // 基础密码强度校验，避免命中后端 400
+  const hasUpper = /[A-Z]/.test(form.password);
+  const hasNumber = /[0-9]/.test(form.password);
+  const hasSpecial = /[^A-Za-z0-9]/.test(form.password);
+  if (form.password.length < 8 || !hasUpper || !hasNumber || !hasSpecial) {
+    errorMessage.value = '密码需至少8位，且包含大写字母、数字和特殊字符';
+    return;
+  }
+
   isLoading.value = true;
   errorMessage.value = '';
   try {
@@ -51,6 +60,18 @@ const submit = async () => {
     console.warn('register failed', err);
     const status = err?.response?.status as number | undefined;
     const backendMsg = err?.response?.data?.message as string | undefined;
+    const fieldErrors = err?.response?.data?.errors as Record<string, string[]> | undefined;
+    // 展示后端字段级错误（Zod）
+    if (fieldErrors) {
+      const pick = (...keys: string[]) => keys.flatMap((k) => fieldErrors[k] ?? []);
+      const messages =
+        pick('displayName', 'email', 'password', 'confirmPassword')[0] ||
+        Object.values(fieldErrors).flat()[0];
+      if (messages) {
+        errorMessage.value = messages;
+        return;
+      }
+    }
     if (!status) {
       errorMessage.value = '无法连接服务器，请检查网络或 API 地址配置。';
     } else if (status === 409) {