feat(oa): 优化提醒逻辑

- 添加当前时间变量以统一时间基准
- 兼容旧字段 type 映射
- 区分逾期和未到期状态，分别格式化时间字符串
- 新增 remainTimeStr 字段用于展示格式化后的时间
- 改进时间差计算方式，提高准确性

ruoyi-oa/src/main/java/com/ruoyi/oa/domain/vo/SysOaRemindVo.java

@@ -108,5 +108,8 @@ public class SysOaRemindVo {
     /** 结束时间 */
     private Date endTime;
 
+    //剩余时间
+    private String remainTimeStr;
+
 
 }

ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaRemindServiceImpl.java

@@ -191,6 +191,7 @@ public class SysOaRemindServiceImpl implements ISysOaRemindService {
 
         // 按 (remind_type, detail_id) 去重：由于已按 create_time 倒序，只保留第一次出现（最新）
         Map<String, SysOaRemindVo> latestMap = new LinkedHashMap<>();
+        Date now = new Date(); // 添加当前时间变量
         for (SysOaRemind remind : remindList) {
             String key = (remind.getRemindType() == null ? "" : remind.getRemindType()) + "_" + (remind.getDetailId() == null ? "" : remind.getDetailId());
             if (latestMap.containsKey(key)) {
@@ -212,21 +213,34 @@ public class SysOaRemindServiceImpl implements ISysOaRemindService {
             vo.setDetailId(remind.getDetailId());
             vo.setTargetUserId(remind.getTargetUserId());
             vo.setEndTime(remind.getEndTime());
-            // 计算剩余秒数和格式化字符串
+            vo.setType(remind.getRemindType()); // 兼容旧字段
+
+            // 计算剩余时间或逾期时间
             if (remind.getEndTime() != null) {
-                long diffMillis = remind.getEndTime().getTime() - System.currentTimeMillis();
-                long remainSeconds = diffMillis / 1000;
-                vo.setRemainTime(remainSeconds);
-                long days = remainSeconds / (60 * 60 * 24);
-                long hours = (remainSeconds / (60 * 60)) % 24;
-                long minutes = (remainSeconds / 60) % 60;
-                long seconds = remainSeconds % 60;
+                long diffMillis = remind.getEndTime().getTime() - now.getTime();
+                long diffSeconds = diffMillis / 1000;
+                vo.setRemainTime(diffSeconds);
+
+                // 格式化时间字符串
+                long absDays = Math.abs(diffSeconds) / (60 * 60 * 24);
+                long absHours = (Math.abs(diffSeconds) / (60 * 60)) % 24;
+                long absMinutes = (Math.abs(diffSeconds) / 60) % 60;
+
                 StringBuilder sb = new StringBuilder();
-                if (days > 0) sb.append(days).append("天");
-                if (hours > 0 || days > 0) sb.append(hours).append("小时");
-                if (minutes > 0 || hours > 0 || days > 0) sb.append(minutes).append("分");
-                sb.append(seconds).append("秒");
-                vo.setRemark(sb.toString());
+                if (diffSeconds < 0) {
+                    // 已逾期
+                    sb.append("逾期 ");
+                    if (absDays > 0) sb.append(absDays).append("天");
+                    if (absHours > 0) sb.append(absHours).append("小时");
+                    if (absMinutes > 0) sb.append(absMinutes).append("分钟");
+                } else {
+                    // 未到期
+                    sb.append("剩余 ");
+                    if (absDays > 0) sb.append(absDays).append("天");
+                    if (absHours > 0) sb.append(absHours).append("小时");
+                    if (absMinutes > 0) sb.append(absMinutes).append("分钟");
+                }
+                vo.setRemainTimeStr(sb.toString());
             }
             latestMap.put(key, vo);
         }