fix: add prefer-readonly rule (#5122)

packages/frontend/workspace/src/blob/engine.ts

@@ -5,8 +5,8 @@ const logger = new DebugLogger('affine:blob-engine');
 
 export class BlobEngine {
   constructor(
-    private local: BlobStorage,
-    private remotes: BlobStorage[]
+    private readonly local: BlobStorage,
+    private readonly remotes: BlobStorage[]
   ) {}
 
   get storages() {

packages/frontend/workspace/src/providers/storage/affine/batch-sync-sender.ts

@@ -15,12 +15,12 @@ interface SyncUpdateSender {
  *   - retryable, allow retry when previous sync request failed but with retry flag been set to true
  */
 export class BatchSyncSender {
-  private buffered: Uint8Array[] = [];
+  private readonly buffered: Uint8Array[] = [];
   private job: Promise<void> | null = null;
   private started = true;
 
   constructor(
-    private guid: string,
+    private readonly guid: string,
     private readonly rawSender: SyncUpdateSender
   ) {}
 

packages/frontend/workspace/src/providers/sync/engine.ts

@@ -63,9 +63,9 @@ export class SyncEngine {
   private abort = new AbortController();
 
   constructor(
-    private rootDoc: Doc,
-    private local: Storage,
-    private remotes: Storage[]
+    private readonly rootDoc: Doc,
+    private readonly local: Storage,
+    private readonly remotes: Storage[]
   ) {
     this._status = {
       step: SyncEngineStep.Stopped,

packages/frontend/workspace/src/providers/sync/peer.ts

@@ -69,8 +69,8 @@ export class SyncPeer {
   logger = new DebugLogger('affine:sync-peer:' + this.name);
 
   constructor(
-    private rootDoc: Doc,
-    private storage: Storage
+    private readonly rootDoc: Doc,
+    private readonly storage: Storage
   ) {
     this.logger.debug('peer start');
 
@@ -150,7 +150,7 @@ export class SyncPeer {
     }
   }
 
-  private state: {
+  private readonly state: {
     connectedDocs: Map<string, Doc>;
     pushUpdatesQueue: AsyncQueue<{
       docId: string;