fix: add prefer-readonly rule (#5122)

packages/frontend/electron/src/main/helper-process.ts

@@ -33,7 +33,7 @@ function pickAndBind<T extends object, U extends keyof T>(
 
 class HelperProcessManager {
   ready: Promise<void>;
-  #process: UtilityProcess;
+  readonly #process: UtilityProcess;
 
   // a rpc server for the main process -> helper process
   rpc?: _AsyncVersionOf<HelperToMain>;

packages/frontend/electron/src/main/updater/custom-github-provider.ts

@@ -29,7 +29,7 @@ const hrefRegExp = /\/tag\/([^/]+)$/;
 export class CustomGitHubProvider extends BaseGitHubProvider<GithubUpdateInfo> {
   constructor(
     options: CustomPublishOptions,
-    private updater: AppUpdater,
+    private readonly updater: AppUpdater,
     runtimeOptions: ProviderRuntimeOptions
   ) {
     super(options as unknown as GithubOptions, 'github.com', runtimeOptions);

packages/frontend/electron/src/shared/utils.ts

@@ -22,7 +22,7 @@ interface MessagePortLike {
 }
 
 export class MessageEventChannel implements EventBasedChannel {
-  constructor(private worker: MessagePortLike) {}
+  constructor(private readonly worker: MessagePortLike) {}
 
   on(listener: (data: unknown) => void) {
     const f = (data: unknown) => {