fix(web): hide archive confirmation in settings with new sidebar - #6226

💭 Looking at the diff for these React settings UI files—SettingsPanels.tsx, SettingsSidebarNav.tsx, and the settings search utilities—there's no Effect service code involved, so no concerns there. I need to format the response as JSON with a success state and the summary "All clear" to match the required schema, then verify that useLegacySidebarEnabled isn't Effect-related before finalizing. The Effect service code looks clean with no issues there. SettingsPanels does reference settings.legacySidebarEnabled directly instead of using the hydration-aware hook, which is a behavioral quirk but outside the scope of what I'm checking. Everything checks out semantically.