chore: fix eslint in blocksuite (#9232)

blocksuite/framework/block-std/src/view/element/block-component.ts

@@ -35,7 +35,7 @@ export class BlockComponent<
   @consume({ context: stdContext })
   accessor std!: BlockStdScope;
 
-  private _selected = computed(() => {
+  private readonly _selected = computed(() => {
     const selection = this.std.selection.value.find(selection => {
       return selection.blockId === this.model?.id;
     });

blocksuite/framework/block-std/src/view/element/gfx-block-component.ts

@@ -108,13 +108,13 @@ export abstract class GfxBlockComponent<
     const parent = this.parentElement;
 
     if (this.hasUpdated || !parent || !('scheduleUpdateChildren' in parent)) {
-      super.scheduleUpdate();
+      return super.scheduleUpdate();
     } else {
       await (parent.scheduleUpdateChildren as (id: string) => Promise<void>)(
         this.model.id
       );
 
-      super.scheduleUpdate();
+      return super.scheduleUpdate();
     }
   }
 
@@ -207,13 +207,13 @@ export function toGfxBlockComponent<
       const parent = this.parentElement;
 
       if (this.hasUpdated || !parent || !('scheduleUpdateChildren' in parent)) {
-        super.scheduleUpdate();
+        return super.scheduleUpdate();
       } else {
         await (parent.scheduleUpdateChildren as (id: string) => Promise<void>)(
           this.model.id
         );
 
-        super.scheduleUpdate();
+        return super.scheduleUpdate();
       }
     }
 

blocksuite/framework/block-std/src/view/element/lit-host.ts

@@ -41,7 +41,7 @@ export class EditorHost extends SignalWatcher(
     }
   `;
 
-  private _renderModel = (model: BlockModel): TemplateResult => {
+  private readonly _renderModel = (model: BlockModel): TemplateResult => {
     const { flavour } = model;
     const block = this.doc.getBlock(model.id);
     if (!block || block.blockViewType === BlockViewType.Hidden) {

blocksuite/framework/block-std/src/view/view-store.ts

@@ -6,7 +6,7 @@ export class ViewStore extends LifeCycleWatcher {
 
   private readonly _blockMap = new Map<string, BlockComponent>();
 
-  private _fromId = (
+  private readonly _fromId = (
     blockId: string | undefined | null
   ): BlockComponent | null => {
     const id = blockId ?? this.std.doc.root?.id;