fix(process): 修复自定义配置 required 不生效

app/flow/config/StepsConfig.php

@@ -29,7 +29,20 @@ class StepsConfig extends AbstractConfig
         } elseif ($override) {
             $this->steps = $parsed;
         } else {
-            $this->steps = array_merge(self::defaultSteps(), $parsed);
+            // 核心逻辑：合并默认步骤 + 自定义步骤，重复 code 以自定义步骤为准
+            // 1. 将默认步骤转为「code => StepConfig」的关联数组（方便快速查找/覆盖）
+            $defaultStepsMap = [];
+            foreach (self::defaultSteps() as $defaultStep) {
+                $defaultStepsMap[$defaultStep->code] = $defaultStep;
+            }
+
+            // 2. 遍历自定义步骤，覆盖默认步骤中相同 code 的元素
+            foreach ($parsed as $customStep) {
+                $defaultStepsMap[$customStep->code] = $customStep;
+            }
+
+            // 3. 转回索引数组（重置键名从0开始），赋值给 $this->steps
+            $this->steps = array_values($defaultStepsMap);
         }
     }
 
@@ -152,12 +165,13 @@ class StepsConfig extends AbstractConfig
      */
     private static function createStep(array $step): StepConfig
     {
-        $known = ['code', 'class', 'enabled'];
+        $known = ['code', 'class', 'enabled', 'required'];
         $expand = array_diff_key($step, array_flip($known));
         return new StepConfig(
             $step['code'],
             $step['class'],
             $step['enabled'] ?? true,
+            $step['required'] ?? [],
             $expand
         );
     }