Describe the bug

When I enable scriptLang: { defaultLang: "ts" } macro, colors in the <script setup> tag change.
For example, I use Synthwave Fluoromachine VSCode theme, the import keywords are pink, when I remove lang="ts" so that the macro adds it automatically, then they change to purple. Also the parentheses color change.

What comes to my mind first is there's no sync between this macro and the Vue Official extension to let it know the script lang is "ts" to show the color syntax highlighting for the *.ts language, so it's treated as JavaScript code.

I tried adding

 "vueCompilerOptions": {
      "plugins": [
        "vue-macros/volar"
      ]
}

in tsconfig.json and in nuxt.config.ts's typescript.tsConfig option.

So it's this something that can be solved or not, so that I can know if I can continue using this macro.

Thanks.

Reproduction

No reproduction required, this is a Vue Official VSCode extension sync issue, not code related per se. If a repro is needed, I'll edit this Issue and add one.

System Info

System:
    OS: Windows 11 10.0.26200
    CPU: (8) x64 Intel(R) Core(TM) i5-1035G1 CPU @ 1.00GHz
    Memory: 1.67 GB / 15.77 GB
  Binaries:
    Node: 24.9.0 - C:\Users\Angel\AppData\Local\fnm_multishells\24160_1761447516787\node.EXE
    npm: 11.6.0 - C:\Users\Angel\AppData\Local\fnm_multishells\24160_1761447516787\npm.CMD
    pnpm: 10.17.1 - C:\Users\Angel\AppData\Local\fnm_multishells\24160_1761447516787\pnpm.CMD
    bun: 1.3.0 - C:\Users\Angel\.bun\bin\bun.EXE
  Browsers:
    Edge: Chromium (140.0.3485.94)
    Firefox: 144.0 - C:\Program Files\Mozilla Firefox\firefox.exe
    Internet Explorer: 11.0.26100.1882

Used Package Manager

bun

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