Prevent idle system sleep on supported desktop runtimes without intentionally keeping the display awake. Narrow wake-lock activation to true active work states and drop the web screen-wake fallback where the platform cannot provide system-sleep-only behavior.
Preserve retry metadata from session.status events so the session list and header can show a live retry countdown with context. Notify users when a session enters retry and reuse the existing error styling so retrying feels actionable without losing the current badge layout.