Mass deletion of chat conversations

Describe the feature you'd like to request

It would be nice to be able to delete multiple chat conversations. The user would be able to select some conversations and delete them all at once.

Describe the solution you'd like

• One additional endpoint that takes a list of session IDs (conversation IDs) and deletes them all, just like the "single deletion" endpoint does.
• A UI element to enter the deletion mode
• The conversation list items (left sidebar) can be selected in deletion mode
• Optional: Allow to "select all/none"

Describe alternatives you've considered

To save space in the UI, instead of an additional "delete multiple" button to enter deletion mode, there could be 2 context menu actions for each conversation list item:

• The existing "delete" that just deletes this conversation
• A "delete multiple" that enters deletion mode and selects this item

Start by locating the existing single-conversation deletion endpoint and the conversation list in the left sidebar. Trace how conversation IDs are passed and how deletion mode could fit the current list interactions. Done means multiple selected conversations can be deleted through the endpoint and the sidebar provides a clear way to enter deletion mode and select conversations.