feat(bpm): 新增流程当前节点及办理人查询接口

支持获取流程实例当前活跃任务列表，包含节点名称、任务ID、开始时间、办理人实名及部门信息，兼容会签/并行分支多任务场景。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/bpm/controller/ActTaskController.java

@@ -19,6 +19,7 @@ import org.flowable.bpmn.model.*;
 import org.flowable.bpmn.model.Process;
 import org.flowable.common.engine.api.FlowableException;
 import org.flowable.engine.*;
+import org.flowable.idm.api.User;
 import org.flowable.engine.history.HistoricActivityInstance;
 import org.flowable.engine.history.HistoricProcessInstance;
 import org.flowable.engine.history.HistoricProcessInstanceQuery;
@@ -508,10 +509,91 @@ public class ActTaskController {
 		return result;
 	}
 
+	/**
+	 * 查询流程当前节点及办理人信息（轻量接口，供列表页按钮快速查看）
+	 *
+	 * @param procInstId 流程实例ID
+	 * @return finished: 是否已结束, endTime: 结束时间, currentTasks: 当前活跃任务列表（节点名+办理人+开始时间）
+	 */
+	@GetMapping(value = "/currentNodeInfo")
+	public Result<Map<String, Object>> getCurrentNodeInfo(@RequestParam(name = "procInstId", required = true) String procInstId) {
+		Result<Map<String, Object>> result = new Result<>();
+		Map<String, Object> map = new HashMap<>();
+
+		// 1. 判断流程是否已结束
+		boolean finished = false;
+		String endTime = null;
+		List<ActHiActinstDTO> startAndEndlist = activitiService.getActHiActinstStartAndEnd(procInstId);
+		if (startAndEndlist != null) {
+			for (ActHiActinstDTO m : startAndEndlist) {
+				if ("endEvent".equals(m.getActType())) {
+					finished = true;
+					endTime = m.getEndTime() != null
+							? DateUtils.formatDate(m.getEndTime(), "YYYY-MM-dd HH:mm:ss") : null;
+					break;
+				}
+			}
+		}
+
+		map.put("finished", finished);
+
+		if (finished) {
+			// 流程已结束：返回结束时间
+			map.put("endTime", endTime);
+			map.put("currentTasks", Collections.emptyList());
+			log.info("【流程-当前节点查询】流程已结束, procInstId: {}, endTime: {}", procInstId, endTime);
+		} else {
+			// 流程未结束：查询所有活跃任务（支持会签/并行分支等多任务场景）
+			List<Task> activeTasks = taskService.createTaskQuery()
+					.processInstanceId(procInstId).active().list();
+
+			List<Map<String, Object>> taskList = new ArrayList<>();
+			if (activeTasks != null && !activeTasks.isEmpty()) {
+				for (Task task : activeTasks) {
+					Map<String, Object> taskInfo = new HashMap<>();
+					taskInfo.put("taskId", task.getId());
+					taskInfo.put("taskName", task.getName());
+					taskInfo.put("taskDefinitionKey", task.getTaskDefinitionKey());
+					taskInfo.put("startTime", task.getCreateTime() != null
+							? DateUtils.formatDate(task.getCreateTime(), "YYYY-MM-dd HH:mm:ss") : null);
+
+					// 查询办理人
+					String assignee = task.getAssignee();
+					if (oConvertUtils.isNotEmpty(assignee)) {
+						taskInfo.put("assignee", assignee);
+						LoginUser user = sysBaseAPI.getUserByName(assignee);
+						taskInfo.put("assigneeName", user != null ? user.getRealname() : assignee);
+						List<String> deptNames = sysBaseAPI.getDepartNamesByUsername(assignee);
+						taskInfo.put("deptNames", deptNames != null ? deptNames : Collections.emptyList());
+					} else {
+						taskInfo.put("assignee", "");
+						taskInfo.put("assigneeName", "待签收");
+						taskInfo.put("deptNames", Collections.emptyList());
+					}
+					taskList.add(taskInfo);
+				}
+			} else {
+				// 没有活跃任务但流程未结束（极端情况，如定时器等待中）
+				Map<String, Object> emptyTask = new HashMap<>();
+				emptyTask.put("taskName", "等待中（无活跃用户任务）");
+				emptyTask.put("assigneeName", "系统自动处理");
+				taskList.add(emptyTask);
+			}
+
+			map.put("currentTasks", taskList);
+			map.put("endTime", null);
+			log.info("【流程-当前节点查询】查询成功, procInstId: {}, 活跃任务数: {}", procInstId, taskList.size());
+		}
+
+		result.setResult(map);
+		result.setSuccess(true);
+		return result;
+	}
+
 
 	/**
 	 * 获取退回的上个节点
-	 * 
+	 *
 	 * @param task
 	 * @param histListNode
 	 * @return