chore: fix eslint in blocksuite (#9232)

blocksuite/affine/data-view/src/view-presets/table/mobile/cell.ts

@@ -36,7 +36,7 @@ export class MobileTableCell extends SignalWatcher(
     }
   `;
 
-  private _cell = createRef<DataViewCellLifeCycle>();
+  private readonly _cell = createRef<DataViewCellLifeCycle>();
 
   @property({ attribute: false })
   accessor column!: TableColumn;

blocksuite/affine/data-view/src/view-presets/table/mobile/column-header.ts

@@ -53,7 +53,7 @@ export class MobileTableColumnHeader extends SignalWatcher(
     }
   `;
 
-  private _clickColumn = () => {
+  private readonly _clickColumn = () => {
     if (this.tableViewManager.readonly$.value) {
       return;
     }

blocksuite/affine/data-view/src/view-presets/table/mobile/group.ts

@@ -50,7 +50,7 @@ export class MobileTableGroup extends SignalWatcher(
 ) {
   static override styles = styles;
 
-  private clickAddRow = () => {
+  private readonly clickAddRow = () => {
     this.view.rowAdd('end', this.group?.key);
     requestAnimationFrame(() => {
       const selectionController = this.viewEle.selectionController;
@@ -68,7 +68,7 @@ export class MobileTableGroup extends SignalWatcher(
     });
   };
 
-  private clickAddRowInStart = () => {
+  private readonly clickAddRowInStart = () => {
     this.view.rowAdd('start', this.group?.key);
     requestAnimationFrame(() => {
       const selectionController = this.viewEle.selectionController;
@@ -86,7 +86,7 @@ export class MobileTableGroup extends SignalWatcher(
     });
   };
 
-  private clickGroupOptions = (e: MouseEvent) => {
+  private readonly clickGroupOptions = (e: MouseEvent) => {
     const group = this.group;
     if (!group) {
       return;
@@ -111,7 +111,7 @@ export class MobileTableGroup extends SignalWatcher(
     ]);
   };
 
-  private renderGroupHeader = () => {
+  private readonly renderGroupHeader = () => {
     if (!this.group) {
       return null;
     }

blocksuite/affine/data-view/src/view-presets/table/mobile/header.ts

@@ -23,7 +23,7 @@ export class MobileTableHeader extends SignalWatcher(
     }
   `;
 
-  private _onAddColumn = () => {
+  private readonly _onAddColumn = () => {
     if (this.readonly) return;
     this.tableViewManager.propertyAdd('end');
     this.editLastColumnTitle();

blocksuite/affine/data-view/src/view-presets/table/mobile/table-view.ts

@@ -45,7 +45,7 @@ export class MobileDataViewTable extends DataViewBase<
     }
   `;
 
-  private _addRow = (
+  private readonly _addRow = (
     tableViewManager: TableSingleView,
     position: InsertToPosition | number
   ) => {