diff --git a/functions.php b/functions.php
index 453822b..94682df 100644
--- a/functions.php
+++ b/functions.php
@@ -8787,15 +8787,21 @@ function argon_ajax_test_unified_api() {
 	check_ajax_referer('argon_test_unified_api', 'nonce');
 	
 	if (!current_user_can('manage_options')) {
-		wp_send_json_error('权限不足');
+		wp_send_json_error(['message' => '权限不足']);
+		return;
+	}
+	
+	$api_id = isset($_POST['api_id']) ? sanitize_text_field($_POST['api_id']) : '';
+	
+	if (empty($api_id)) {
+		wp_send_json_error(['message' => '缺少 API ID 参数']);
 		return;
 	}
 	
-	$api_id = sanitize_text_field($_POST['api_id']);
 	$api = argon_get_api_by_id($api_id);
 	
 	if (!$api) {
-		wp_send_json_error('API 不存在');
+		wp_send_json_error(['message' => 'API 不存在']);
 		return;
 	}
 	
@@ -8816,7 +8822,7 @@ function argon_ajax_test_unified_api() {
 	$api_endpoint = !empty($api['api_endpoint']) ? $api['api_endpoint'] : (isset($default_endpoints[$api['provider']]) ? $default_endpoints[$api['provider']] : '');
 	
 	if (empty($api_endpoint)) {
-		wp_send_json_error('未配置 API 端点');
+		wp_send_json_error(['message' => '未配置 API 端点']);
 		return;
 	}
 	
@@ -8865,7 +8871,7 @@ function argon_ajax_test_unified_api() {
 	$response_time = round((microtime(true) - $start_time) * 1000);
 	
 	if (is_wp_error($response)) {
-		wp_send_json_error('连接失败: ' . $response->get_error_message());
+		wp_send_json_error(['message' => '连接失败: ' . $response->get_error_message()]);
 		return;
 	}
 	
@@ -8880,7 +8886,7 @@ function argon_ajax_test_unified_api() {
 				'response_time' => $response_time
 			]);
 		} else {
-			wp_send_json_error('API 返回格式异常: ' . substr($body, 0, 200));
+			wp_send_json_error(['message' => 'API 返回格式异常: ' . substr($body, 0, 200)]);
 		}
 	} else {
 		$error_msg = 'HTTP ' . $status_code;
@@ -8890,7 +8896,7 @@ function argon_ajax_test_unified_api() {
 		} else {
 			$error_msg .= ': ' . substr($body, 0, 200);
 		}
-		wp_send_json_error($error_msg);
+		wp_send_json_error(['message' => $error_msg]);
 	}
 }
 add_action('wp_ajax_argon_test_unified_api', 'argon_ajax_test_unified_api');
diff --git a/settings.php b/settings.php
index 4d47fe9..4cfac80 100644
--- a/settings.php
+++ b/settings.php
@@ -2455,8 +2455,8 @@ function themeoptions_page(){
 							if (response.success) {
 								alert('✓ ' + response.data.message);
 							} else {
-								// wp_send_json_error 的错误消息在 response.data 中
-								let errorMsg = response.data || '<?php _e('未知错误', 'argon'); ?>';
+								// wp_send_json_error 的错误消息在 response.data.message 中
+								let errorMsg = (response.data && response.data.message) ? response.data.message : '<?php _e('未知错误', 'argon'); ?>';
 								alert('✗ <?php _e('测试失败:', 'argon'); ?> ' + errorMsg);
 							}
 							$btn.prop('disabled', false).html(originalHtml);
@@ -2464,7 +2464,7 @@ function themeoptions_page(){
 							// AJAX 请求本身失败
 							console.error('AJAX Error:', xhr, status, error);
 							console.error('Response Text:', xhr.responseText);
-							alert('<?php _e('请求失败，请重试', 'argon'); ?>');
+							alert('✗ <?php _e('请求失败:', 'argon'); ?> ' + (xhr.responseText || error || '<?php _e('网络错误', 'argon'); ?>'));
 							$btn.prop('disabled', false).html(originalHtml);
 						});
 					});