fix(core): editor blur unexpectedly when clicking blank area (#10501)

### Before

https://github.com/user-attachments/assets/3c4b20e1-6d89-4dc7-a51f-04b6e9a89486

### After

https://github.com/user-attachments/assets/86b93403-597e-4dbb-ab65-90908342c230

packages/frontend/core/src/blocksuite/block-suite-editor/blocksuite-editor-container.tsx

@@ -151,6 +151,7 @@ export const BlocksuiteEditorContainer = forwardRef<
         const focusBlock = std.view.getBlock(lastBlock.id) ?? undefined;
         std.command.exec(focusBlockEnd, {
           focusBlock,
+          force: true,
         });
         return;
       }