[Bug]: disableHtmlFolder is not used in the vercel's config.json deploy file

[giancarlosisasi]

Version

System:
    OS: macOS 26.1
    CPU: (12) arm64 Apple M4 Pro
    Memory: 207.86 MB / 24.00 GB
    Shell: 5.9 - /bin/zsh
  Browsers:
    Brave Browser: 143.1.85.120
    Chrome: 143.0.7499.193
    Safari: 26.1
  npmPackages:
    @modern-js/app-tools: 2.70.2 => 2.70.2 
    @modern-js/runtime: 2.70.2 => 2.70.2

Details

Context: i'm deploy a modernjs app in Vercel

The config disableHtmlFolder is not being used when generating the .vercel/output/config.json.

if I have this:

   html: {
      disableHtmlFolder: true,
    },

the file (.vercel/output/config.json) is generated like

{
  "version": 3,
  "routes": [
    {
      "src": "/static/(.*)",
      "headers": {
        "cache-control": "s-maxage=31536000, immutable"
      },
      "continue": true
    },
    {
      "handle": "filesystem"
    },
    {
      "src": "/(?:/.*)?",
      "headers": {
        "cache-control": "s-maxage=0"
      },
      "dest": "/html/main/index.html" // <---- here is the problem
    }
  ]
}

The last part "dest": "/html/main/index.html" should be "dest": "/html/main.html" when html.disableHtmlFolder is true

I think the line that needs to be changed is here:

modern.js/packages/solutions/app-tools/src/plugins/deploy/platforms/vercel.ts

Line 74 in 62740a3

dest: `/html/${entry.entryName}/index.html`,

Reproduce link

modern.js/packages/solutions/app-tools/src/plugins/deploy/platforms/vercel.ts

Line 74 in 62740a3

dest: `/html/${entry.entryName}/index.html`,

Reproduce Steps

1. Configure html.disableHtmlFolder to true
2. Run MODERNJS_DEPLOY=vercel npm modern deploy
3. Go to .vercel/output/config.json

[caohuilin]

#8213