fix: 修复遍历中删除map键及替换视频时长字段

workflow/service/flow/lambda_node_util.go

@@ -138,11 +138,24 @@ func GetComposeResult(ctx context.Context, buildType int, modelName, promptConte
 	}
 	var newUserForm []map[string]any
 	for _, m := range userForm {
+		// 先替换字段
+		if val, ok := m["videoDuration"]; ok {
+			delete(m, "videoDuration")
+			m["视频总时长"] = val
+		}
+
+		// 收集待删除 key
+		var delKeys []string
 		for k, v := range m {
 			if collectFileUrls(v) {
-				delete(m, k)
+				delKeys = append(delKeys, k)
 			}
 		}
+		// 统一删除
+		for _, k := range delKeys {
+			delete(m, k)
+		}
+
 		if len(m) > 0 {
 			newUserForm = append(newUserForm, m)
 		}