[FIX] mail: fix "New messages" separator and channel_seen behaviour

- channel_seen is now called even for own message and only when needed
- channel_seen is now called with a message_id which transfer the
  decision of what is seen to the client which makes more sense

task-2282235
task-2282248

closes odoo/odoo#57950

X-original-commit: 04edfa50ccea305050d017c4a1996e561bc7bd57
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/addons/mail/static/src/models/thread_view/thread_view.js b/addons/mail/static/src/models/thread_view/thread_view.js
index d7ea1508067..599a99cc936 100644
--- a/addons/mail/static/src/models/thread_view/thread_view.js
+++ b/addons/mail/static/src/models/thread_view/thread_view.js
@@ -95,7 +95,7 @@ function factory(dependencies) {
             const lastMessageIsVisible = this.lastVisibleMessage &&
                 this.lastVisibleMessage === this.lastMessage;
             if (lastMessageIsVisible && this.hasComposerFocus && this.thread) {
-                this.thread.markAsSeen().catch(e => {
+                this.thread.markAsSeen(this.lastMessage.id).catch(e => {
                     // prevent crash when executing compute during destroy
                     if (!(e instanceof RecordDeletedError)) {
                         throw e;