Memoize extra agent configurations.

[flvndvd]

This PR addresses the recently introduced regression (#3016) that resulted in multiple re-renders, which cleared the content from the input bar. The issue stemmed from alterations to the values returned by a hook that retains changes.

The issue comes from those lines:

dust/front/components/assistant/conversation/input_bar/InputBar.tsx

Lines 71 to 79 in 091e62d

	const agentConfigurationsToAdd = additionalAgentConfigurations
	? additionalAgentConfigurations.filter(
	(a) => !baseAgentConfigurations.find((b) => a.sId === b.sId)
	)
	: [];
	const agentConfigurations = [
	...baseAgentConfigurations,
	...agentConfigurationsToAdd,
	];

Before:

After: