Content Agent: Inline confirmation dialogs, Slack improvements, and bug fixes

This update introduces inline confirmation dialogs that let you review actions before the agent executes them. The Slack integration gains more concise responses and usability improvements, along with several bug fixes.

Inline confirmation dialogs

For larger bulk operations on search results, the agent pauses and asks for your confirmation before proceeding. An inline confirm/cancel dialog appears in the chat when the estimated cost exceeds 100 AI credits, giving you a chance to review what's about to happen.

Additional features

Slack - more concise responses: The Slack agent now gives shorter, more focused answers.

Slack - display names in suggestions: Suggestion dropdowns in the Slack integration now show real names instead of IDs.

Notable bug fixes and improvements

Fixed a crash that could occur when switching between the proposed changes tab and Studio navigation.

Resolved an issue where agent responses could show duplicate or stacked content in the chat.

Single questions without follow-up no longer retain context from previous conversations.

The Slack integration now correctly displays error messages instead of failing silently.

Canceling an agent response while it's still generating no longer produces error messages.