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9d8eb76746
The auto-update feature was driven by two narrow Wails events (netbird:update:available and :progress) plus a SystemEvent-metadata iteration on the React side. Both surfaces had to know the daemon metadata schema (new_version_available, enforced, progress_window), and the frontend had no pull endpoint to seed its state on mount. Extract the state machine into a new client/ui/updater package, mirroring how i18n and preferences are split between domain logic and a thin services facade. The package owns the State type, the metadata-key parsing, the mutex-guarded Holder, and the single netbird:update:state event. services.Update keeps the daemon RPCs (Trigger, GetInstallerResult, Quit) and gains GetState as a Wails pull endpoint. Tray-side update behaviour moves out of tray.go into a dedicated trayUpdater (tray_update.go): owns its menu item, OS notification, click handler, and the /update window opener triggered by the daemon's progress_window:show. tray.go drops three callbacks and four fields, and reads hasUpdate through the updater. Frontend ClientVersionContext now seeds from Update.GetState() and subscribes to netbird:update:state; the status.events iteration and metadata-key string literals are gone. UpdateAvailableBanner renders only for the enforced && !installing branch and labels its action "Install now"; UpdateVersionCard splits the install vs. download branches by Enforced so the disabled flow routes to GitHub.