fix(editor): opacity does not work (#12402)

fix: BS-3484

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **Style**
  - Improved visibility of certain table row headers by ensuring their opacity cannot be unintentionally overridden by other styles.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/data-view/src/view-presets/table/pc-virtual/row/row-header-css.ts

@@ -39,6 +39,9 @@ export const dragHandlerIndicator = css({
   backgroundColor: 'var(--affine-placeholder-color)',
 });
 
+export const show = css({
+  opacity: '1 !important',
+});
 export const rowSelectCheckbox = css({
   display: 'flex',
   alignItems: 'center',
@@ -47,7 +50,3 @@ export const rowSelectCheckbox = css({
   fontSize: '20px',
   color: cssVarV2.icon.primary,
 });
-
-export const show = css({
-  opacity: 1,
-});