Persist configurable connectivity diagnostics

src/web/state/operations.ts

@@ -1,6 +1,6 @@
 export type OperationKey = 'connection' | 'serverApply' | 'profileAdd' | 'profileRename'
   | 'profileSelect' | 'profileActivate' | 'profileRefresh' | 'profileDelete'
-  | 'gatewayAuto' | 'routeRules';
+  | 'gatewayAuto' | 'routeRules' | 'diagnosticsSettings';
 
 export interface OperationState {
   status: 'running';
@@ -21,6 +21,7 @@ const OPERATION_KEYS: readonly OperationKey[] = [
   'profileDelete',
   'gatewayAuto',
   'routeRules',
+  'diagnosticsSettings',
 ];
 
 // The backend has one canonical revision and one mutation queue, so the UI mirrors that lock.