fix: 修复chatlog会话元数据回写与覆盖问题

- 为消息追加命令补充用户、助手与会话标题元信息

- 持久化后按会话聚合触发createOrTouch并优化空值覆盖策略

- 增加ChatPersistMySqlApplyService单测覆盖会话回写链路

easyflow-modules/easyflow-module-chatlog/src/main/java/tech/easyflow/chatlog/service/ChatPersistMySqlApplyService.java

@@ -106,6 +106,7 @@ public class ChatPersistMySqlApplyService {
             insertedCommands = logRepository.appendMessages(appendCommands);
         }
         if (!insertedCommands.isEmpty()) {
+            sessionRepository.createOrTouchBatch(buildSessionUpserts(insertedCommands));
             summaryCommands.clear();
             for (ChatAppendMessageCommand insertedCommand : insertedCommands) {
                 accumulateSummary(summaryCommands, insertedCommand);
@@ -139,9 +140,74 @@ public class ChatPersistMySqlApplyService {
         }
     }
 
+    List<ChatSessionUpsertCommand> buildSessionUpserts(List<ChatAppendMessageCommand> commands) {
+        if (commands == null || commands.isEmpty()) {
+            return List.of();
+        }
+        Map<BigInteger, ChatSessionUpsertCommand> upserts = new LinkedHashMap<>();
+        for (ChatAppendMessageCommand command : commands) {
+            if (command == null || command.getSessionId() == null) {
+                continue;
+            }
+            ChatSessionUpsertCommand upsert = upserts.computeIfAbsent(command.getSessionId(), key -> {
+                ChatSessionUpsertCommand created = new ChatSessionUpsertCommand();
+                created.setSessionId(command.getSessionId());
+                created.setTenantId(command.getTenantId());
+                created.setDeptId(command.getDeptId());
+                created.setUserId(command.getUserId());
+                created.setAssistantId(command.getAssistantId());
+                created.setOperateAt(null);
+                return created;
+            });
+            if (upsert.getTenantId() == null) {
+                upsert.setTenantId(command.getTenantId());
+            }
+            if (upsert.getDeptId() == null) {
+                upsert.setDeptId(command.getDeptId());
+            }
+            if (upsert.getUserId() == null) {
+                upsert.setUserId(command.getUserId());
+            }
+            if (upsert.getAssistantId() == null) {
+                upsert.setAssistantId(command.getAssistantId());
+            }
+            if (isBlank(upsert.getUserAccount()) && !isBlank(command.getUserAccount())) {
+                upsert.setUserAccount(command.getUserAccount().trim());
+            }
+            if (isBlank(upsert.getAssistantCode()) && !isBlank(command.getAssistantCode())) {
+                upsert.setAssistantCode(command.getAssistantCode().trim());
+            }
+            if (isBlank(upsert.getAssistantName()) && !isBlank(command.getAssistantName())) {
+                upsert.setAssistantName(command.getAssistantName().trim());
+            }
+            if (isBlank(upsert.getTitle()) && !isBlank(command.getSessionTitle())) {
+                upsert.setTitle(command.getSessionTitle().trim());
+            }
+            Date operateAt = defaultDate(command.getCreated());
+            if (upsert.getOperateAt() == null || !operateAt.before(upsert.getOperateAt())) {
+                upsert.setOperateAt(operateAt);
+                upsert.setOperatorId(command.getCreatedBy());
+            }
+        }
+        for (ChatSessionUpsertCommand upsert : upserts.values()) {
+            if (isBlank(upsert.getUserAccount())) {
+                upsert.setUserAccount("");
+            }
+            if (isBlank(upsert.getTitle())) {
+                upsert.setTitle("会话-" + upsert.getSessionId());
+            }
+            if (upsert.getOperateAt() == null) {
+                upsert.setOperateAt(new Date());
+            }
+            if (upsert.getOperatorId() == null) {
+                upsert.setOperatorId(upsert.getUserId());
+            }
+        }
+        return new ArrayList<>(upserts.values());
+    }
+
     private YearMonth resolveMonth(Date createdAt) {
-        Date created = createdAt == null ? new Date() : createdAt;
-        return YearMonth.from(created.toInstant().atZone(ZoneId.systemDefault()).toLocalDate());
+        return YearMonth.from(defaultDate(createdAt).toInstant().atZone(ZoneId.systemDefault()).toLocalDate());
     }
 
     private String trimPreview(String text) {
@@ -150,4 +216,12 @@ public class ChatPersistMySqlApplyService {
         }
         return text.length() <= 200 ? text : text.substring(0, 200);
     }
+
+    private boolean isBlank(String value) {
+        return value == null || value.isBlank();
+    }
+
+    private Date defaultDate(Date value) {
+        return value == null ? new Date() : value;
+    }
 }

easyflow-modules/easyflow-module-chatlog/src/main/java/tech/easyflow/chatlog/service/impl/ChatlogRuntimeListener.java

@@ -105,7 +105,11 @@ public class ChatlogRuntimeListener implements ChatRuntimeListener {
         command.setDeptId(defaultNumber(context.getDeptId()));
         command.setSessionId(context.getSessionId());
         command.setUserId(defaultNumber(context.getUserId()));
+        command.setUserAccount(context.getUserAccount());
         command.setAssistantId(defaultNumber(context.getAssistantId()));
+        command.setAssistantCode(context.getAssistantCode());
+        command.setAssistantName(context.getAssistantName());
+        command.setSessionTitle(context.getSessionTitle());
         command.setSenderId(defaultNumber(message.getSenderId()));
         command.setSenderName(message.getSenderName());
         command.setSenderRole(message.getRole());