chore: fix eslint in blocksuite (#9232)

blocksuite/affine/data-view/src/widget-presets/tools/presets/search/search.ts

@@ -93,7 +93,7 @@ export class DataViewHeaderToolsSearch extends WidgetBase<
 > {
   static override styles = styles;
 
-  private _clearSearch = () => {
+  private readonly _clearSearch = () => {
     this._searchInput.value = '';
     this.view.setSearch('');
     this.preventBlur = true;
@@ -102,25 +102,25 @@ export class DataViewHeaderToolsSearch extends WidgetBase<
     });
   };
 
-  private _clickSearch = (e: MouseEvent) => {
+  private readonly _clickSearch = (e: MouseEvent) => {
     e.stopPropagation();
     this.showSearch = true;
   };
 
-  private _onSearch = (event: InputEvent) => {
+  private readonly _onSearch = (event: InputEvent) => {
     const el = event.target as HTMLInputElement;
     const inputValue = el.value.trim();
     this.view.setSearch(inputValue);
   };
 
-  private _onSearchBlur = () => {
+  private readonly _onSearchBlur = () => {
     if (this._searchInput.value || this.preventBlur) {
       return;
     }
     this.showSearch = false;
   };
 
-  private _onSearchKeydown = (event: KeyboardEvent) => {
+  private readonly _onSearchKeydown = (event: KeyboardEvent) => {
     if (event.key === 'Escape') {
       if (this._searchInput.value) {
         this._searchInput.value = '';

blocksuite/affine/data-view/src/widget-presets/tools/presets/table-add-row/add-row.ts

@@ -19,7 +19,7 @@ const styles = css`
 export class DataViewHeaderToolsAddRow extends WidgetBase {
   static override styles = styles;
 
-  private _onAddNewRecord = () => {
+  private readonly _onAddNewRecord = () => {
     if (this.readonly) return;
     this.viewMethods.addRow?.('start');
   };