feat: add multi-delete functionality for messages.

[AyushKumar123456789]

Proposed changes (including videos or screenshots)

This PR implements a new multi-delete functionality . The changes include:

• Added Checkbox in Default Message Items:
  A checkbox now appears with each message; however, it is rendered only if the current user has permission to delete that message.

• Implemented MultiDeleteButton Component:
  A new component, MultiDeleteButton, has been added. When multiple messages are selected, this button appears (via the Room header toolbox). Upon clicking, a confirmation modal is shown, and on confirmation, the component uses hook to call the existing chat.delete endpoint for each selected message.

• Integration into RoomHeader:
  The MultiDeleteButton is injected into the RoomHeader ,So that the multi-delete option is easily accessible in the header's toolbox area.

Issue(s)

Closes #917

Steps to test or reproduce

1. Navigate to any chat room where you have permission to delete messages.
2. Verify that each message shows a delete checkbox only if you have permission to delete that message.
3. Select multiple messages by clicking their checkboxes.
4. Ensure that when more than one message is selected, a trash icon appears in the room header’s toolbox.
5. Click the trash icon to open the confirmation modal.
6. Confirm deletion, and verify that:
   • A success toast is displayed upon successful deletion,
   • The selected messages are removed,
   • The checkbox state is cleared.

Further comments

This change improves message management efficiency by enabling bulk deletion of messages. The implementation builds upon our existing deletion endpoint for individual messages. I have taken great care to preserve the existing code structure wherever possible. In areas such as the header title and the generic modal, I used raw message strings (with underscores) in cases where a proper translation did not yet exist, to ensure accurate rendering in the meantime. It is recommended that new translation keys be added to our i18n files for complete localization. I appreciate any feedback on further refinements or additional requirements.

multidelete.mp4

[changeset-bot]

🦋 Changeset detected

Latest commit: fb32d6d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 35 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/api-client	Patch
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/freeswitch	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/livechat	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/models	Patch
@rocket.chat/network-broker	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/ui-voip	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/instance-status	Patch

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[dionisio-bot]

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[AyushKumar123456789]

I’ve updated the PR title, trying to ensure it might align with the required format. Please let me know if there’s anything else I need to address or improve. I’m happy to make further changes if required.

[dougfabris]

The addition is really great but the way you implemented its not really friendly.
I would like to suggest some changes so we could merge the feature:

1. We already have a pattern to select multiple messages, you can check it trying to use the export message feature.
2. Instead of opening the confirmation modal when clicking in Delete message, you could open turn on the selection mode, selecting the initial message and allowing the user to select more and we can render a similar composer we have for export messages but now with the action to delete
3. Now clicking on delete the confirmation modal is displayed

[AyushKumar123456789]

Thank you for the feedback. I appreciate the suggestions and will update the PR to use the selection mode approach as suggested. I'll work on the changes soon. Thanks for helping improve this feature!

[AyushKumar123456789]

This implementation follows the existing pattern for selecting multiple messages, similar to the export message feature. When the delete button is clicked, the UI enters selection mode, allowing users to select the initial message and additional messages. A composer has been added to facilitate the deletion of selected messages .

multi.message.delete.mp4

thread.message.delete.mp4

I have also added a Doc , For detailed information on the implementation : Doc Link

Thank you for your time and consideration. I appreciate any further feedback to improve this feature.