fix: 修复开始表单旧工作流兼容回退

- 避免旧开始节点缺失 user_input 时运行态强行注入系统问题字段

- 补充运行参数解析兼容测试并收口 M12 尾项

easyflow-modules/easyflow-module-ai/src/test/java/tech/easyflow/ai/easyagentsflow/service/WorkflowRunningParameterResolverTest.java

@@ -106,6 +106,35 @@ public class WorkflowRunningParameterResolverTest {
         Assert.assertEquals("file", fields.get(1).get("type"));
     }
 
+    /**
+     * 旧工作流若不存在系统问题参数，运行态不应凭空注入 user_input。
+     *
+     * @throws Exception 反射注入失败
+     */
+    @Test
+    public void testBuildRunningParametersViewShouldNotInjectUserInputForLegacyParametersWithoutSystemField() throws Exception {
+        WorkflowRunningParameterResolver resolver = newResolver();
+        JSONObject startData = data("开始");
+        startData.put("parameters", startParametersWithoutUserInput());
+
+        Workflow workflow = workflow(
+                workflowJson(
+                        array(
+                                node("s1", "startNode", null, startData),
+                                node("e1", "endNode", null, data("结束"))
+                        ),
+                        array(edge("e1", "s1", "e1"))
+                )
+        );
+
+        Map<String, Object> result = resolver.buildRunningParametersView(workflow);
+        Assert.assertNotNull(result);
+        List<Map<String, Object>> fields = (List<Map<String, Object>>) result.get("startFormSchema");
+        Assert.assertEquals(1, fields.size());
+        Assert.assertEquals("attachments", fields.get(0).get("key"));
+        Assert.assertEquals("file", fields.get(0).get("type"));
+    }
+
     /**
      * 文件参数运行值应统一归一化为数组并按 filePath 去重。
      *
@@ -209,6 +238,21 @@ public class WorkflowRunningParameterResolverTest {
         return parameters;
     }
 
+    private static JSONArray startParametersWithoutUserInput() {
+        JSONArray parameters = new JSONArray();
+
+        JSONObject fileField = new JSONObject();
+        fileField.put("name", "attachments");
+        fileField.put("dataType", "File");
+        fileField.put("refType", "input");
+        fileField.put("required", false);
+        fileField.put("contentType", "file");
+        fileField.put("formType", "input");
+        fileField.put("formLabel", "附件");
+        parameters.add(fileField);
+        return parameters;
+    }
+
     private static Map<String, Object> fileValue(String fileName, String filePath, Long size) {
         Map<String, Object> value = new LinkedHashMap<>();
         value.put("fileName", fileName);