Can't generate emit functions type when build a .vue file in version 4.x.x

[ja-plus]

Describe the bug

version 4.x.x will remove all the emit type definition. That's not good
above image shows : left part is built by version 4.3.0, right part is built by 3.9.1.

Reproduction

no

Steps to reproduce

No response

System Info

System:
    OS: Windows 10 10.0.19044
    CPU: (4) x64 Intel(R) Xeon(R) Silver 4214 CPU @ 2.20GHz
    Memory: 761.59 MB / 7.99 GB
  Binaries:
    Node: 18.16.0 - D:\ThsSoftware\nodejs1816_ths\ths\node.EXE
    npm: 8.19.4 - D:\ThsSoftware\nodejs1816_ths\ths\npm.CMD
    pnpm: 8.14.3 - D:\ThsSoftware\nodejs1816_ths\ths\pnpm.CMD
  Browsers:
    Edge: Spartan (44.19041.1266.0), Chromium (133.0.3065.69)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    @vitejs/plugin-vue: ^5.1.4 => 5.1.4
    vite: ^5.4.10 => 5.4.10
    vite-plugin-dts: 4.3.0 => 4.3.0

Validations

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• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.

[ja-plus]

I've comment some emits type.
I found if the emits type definition more than 8, The build result will change to：

[x: `on${Capitalize<any>}`]: ...

[qmhc]

Could you try the latest version of plugin?

[artmakarov]

I've comment some emits type. I found if the emits type definition more than 8, The build result will change to：

[x: `on${Capitalize<any>}`]: ...

Could you try the latest version of plugin?

@qmhc Faced the same problem when using version 4.5.3

"@vue/tsconfig": "^0.7.0",
"vue": "^3.5.13",
"vite": "^6.2.3",
"vite-plugin-dts": "^4.5.3",