The previous check used currentAgent?.toLowerCase() === 'athena' which failed
after display name remapping stored the agent as 'Athena (Council)' in session
state. Now uses getAgentConfigKey() to resolve display names back to config keys,
matching the established pattern used by other hooks (atlas, todo-continuation, etc.).
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
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