- Make the menu icon cache's MainActor isolation explicit. Every access is during SwiftUI rendering on the main thread, so the cache was already race-free via the module's default actor isolation; the attribute makes that contract compiler-enforced and documents why a lock is the wrong tool here (NSImage isn't Sendable). - Skip the redundant repository-settings write when resetting an already-automatic repo to Automatic, while still re-resolving and reopening so the entry stays consistent with the concrete app rows.