fix(auth): 修复注册成功验证并更新版本号

- 添加注册响应的成功状态检查
- 注册失败时显示相应错误消息
- 更新侧边栏中显示的应用版本号至 v1.3.1

Author: ouyangyanhuo

src/components/layout/Sidebar.jsx

@@ -103,7 +103,7 @@ const SidebarContent = ({ onClose }) => (
     {/* Footer */}
     <div className="p-4 border-t border-gray-200 dark:border-dark-border">
       <p className="text-xs text-gray-500 dark:text-gray-400 text-center">
-        WordMaster v1.3.0
+        WordMaster v1.3.1
       </p>
     </div>
   </div>

src/pages/auth/Register.jsx

@@ -64,9 +64,14 @@ const Register = () => {
         password: data.password,
         nickname: data.nickname || data.username,
       });
-      login(response.data);
-      toast.success('注册成功！');
-      navigate('/dashboard');
+
+      if (response.success) {
+        login(response.data);
+        toast.success('注册成功！');
+        navigate('/dashboard');
+      } else {
+        toast.error(response.message || '注册失败');
+      }
     } catch (error) {
       toast.error(
         error.response?.data?.message || '注册失败，请检查输入信息'