Odoo Release Updates

[REF] mail: simplify SCSS of message bubble color in dark theme

[FIX] mail: fix activity _check_access when record is missing

[IMP] mail: Add link between activities generated from plans and their template

[FIX] mail, *: auto-open member and livechat info should combine

[REF] mail, *: DiscussAppCategory.hidden as local storage field

[FIX] mail: fixing document visibility issue after an activity edit in chatter.

[FIX] mail: don't bump channel on notification message

[FIX] mail: prevent template duplication on save

[REF] mail: `isNotificationPermissionDismissed` local storage field

[FIX] mail: reduce eye strain when using discuss app in dark theme

[IMP] mail: add channel for message_actions

[IMP] mail: add button to clear search in search messages panel

[FIX] mail: avoid access error when archiving channel as non admin

[REF] mail: move import comment

[IMP] mail, web: native-like "back" navigation on mobile browser

[FIX] mail: correctly subtract channel needaction counter from global

[FIX] mail: allow starring persistent messages without thread

[REF] mail,im_livechat: use discuss.channel model instead of mail.thread

[IMP] im_livechat, mail: display country flag and language in discuss sidebar

[IMP] mail: clean discuss category UX/UI

[FIX] mail: proper ratio of avatar in follower list menu

[REF] mail: channel mention use discuss.channel

[FIX] mail_activity_schedule: correct plan_id assignment when having multiple schedulers

[FIX] {,test_}mail: avoid marking unrelated notifications as bounced

[REF] mail: use channel for discuss thread_action

[IMP] mail: server actions: add activity plans

[FIX] mail: restrict discuss settings to administrators

[FIX] mail: enable other views when opening records

[FIX] mail: no access error on starring message without write access

[FIX] mail: proper `group_public_id` for public channel