fix: codebar language search hotkey conflict (#12522)

Closes: BS-3395

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

## Summary by CodeRabbit

- **Bug Fixes**
  - Improved keyboard input handling in filterable lists to prevent unintended interactions when using arrow keys, Enter, or Escape.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/components/src/filterable-list/index.ts

@@ -92,6 +92,7 @@ export class FilterableListComponent<Props = unknown> extends WithDisposable(
     const isFlip = !!this.placement?.startsWith('top');
 
     const _handleInputKeydown = (ev: KeyboardEvent) => {
+      ev.stopPropagation();
       switch (ev.key) {
         case 'ArrowUp': {
           ev.preventDefault();