fix: persist group join system notices

server/im_http.go

@@ -5619,6 +5619,11 @@ func serveIMGroupInvitations(wrt http.ResponseWriter, req *http.Request, topic s
 			}
 			if joined {
 				item["status"] = types.GroupInvitationStatusJoined
+				if imReliableHTTPEventsEnabled(req) {
+					publishIMGroupMemberJoinedSystemNotice(principal.TenantID, topic, principal.Uid, uid,
+						"有成员通过邀请加入了群聊。",
+						map[string]any{"source": "direct_invitation"})
+				}
 			} else {
 				item["status"] = "already_member"
 			}
@@ -5863,6 +5868,11 @@ func serveIMGroupJoinRequests(wrt http.ResponseWriter, req *http.Request, topic
 			}
 			publishIMGroupRealtimeEvent(principal.TenantID, topic, principal.Uid, "group.member.joined",
 				map[string]any{"user_id": principal.Uid.UserId(), "joined": joined, "source": "open_group"})
+			if joined && imReliableHTTPEventsEnabled(req) {
+				publishIMGroupMemberJoinedSystemNotice(principal.TenantID, topic, principal.Uid, principal.Uid,
+					"有成员加入了群聊。",
+					map[string]any{"source": "open_group"})
+			}
 			writeIMSuccess(wrt, req, map[string]any{"topic": topic, "status": "joined", "joined": joined, "source": "open_group"})
 			return
 		}
@@ -11652,6 +11662,28 @@ func publishIMGroupInvitationNotification(tenantID types.TenantID, inv *types.Gr
 	}
 }
 
+func publishIMGroupMemberJoinedSystemNotice(tenantID types.TenantID, topic string, inviter, target types.Uid, text string, extra map[string]any) {
+	if target.IsZero() {
+		return
+	}
+	actors := make([]imSystemMessageActor, 0, 2)
+	if !inviter.IsZero() && inviter != target {
+		actors = append(actors, imSystemMessageActor{
+			UserID: inviter.UserId(),
+			Click:  map[string]any{"type": "user_profile", "target_id": inviter.UserId()},
+		})
+	}
+	actors = append(actors, imSystemMessageActor{
+		UserID: target.UserId(),
+		Click:  map[string]any{"type": "user_profile", "target_id": target.UserId()},
+	})
+	publishIMConversationSystemNotice(tenantID, topic,
+		"system_action", "group_member_joined", text,
+		actors,
+		[]imSystemMessageAction{{Type: "group_profile", Label: "查看群聊", TargetID: topic}},
+		extra)
+}
+
 func deliverIMConversationSystemMessageToP2PSessions(tenantID types.TenantID, msg *types.Message, out *ServerComMessage) {
 	if globals.sessionStore == nil || msg == nil || out == nil || out.Data == nil {
 		return