fix: dialog buttons cannot show

[bytemain]

Types

• [x] 🐛 Bug Fixes

Background or solution

在 codeblitz 上，必现 dialog buttons 出不来：

Changelog

fix dialog buttons cannot show

[bytemain]

/next

[opensumi[bot]]

🎉 PR Next publish successful!

3.1.3-next-1719220003.0

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 55.32%. Comparing base (43ba89b) to head (c3c9a14).

Files	Patch %	Lines
packages/overlay/src/browser/dialog.service.ts	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## v3.1 #3803 +/- ## ========================================== + Coverage 55.16% 55.32% +0.15% ========================================== Files 1549 1540 -9 Lines 96094 93906 -2188 Branches 19948 19282 -666 ========================================== - Hits 53011 51949 -1062 + Misses 35658 34807 -851 + Partials 7425 7150 -275 ``` | [Flag](https://app.codecov.io/gh/opensumi/core/pull/3803/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensumi) | Coverage Δ | | |---|---|---| | [jsdom](https://app.codecov.io/gh/opensumi/core/pull/3803/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensumi) | `50.78% <0.00%> (+0.21%)` | :arrow_up: | | [node](https://app.codecov.io/gh/opensumi/core/pull/3803/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensumi) | `15.55% <0.00%> (-0.21%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensumi#carryforward-flags-in-the-pull-request-comment) to find out more.

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[bytemain]