TSC error with Vitest 2.0.5: missing declarations for "chai"

[danielrentz]

Describe the bug

Using Vitest v2.0.5 gives a type error when TSC typechecks vite.config.ts in strict mode.

node_modules/vitest/dist/chunks/reporters.C_zwCd4j.d.ts:17:23 - error TS7016: Could not find a declaration file for module 'chai'. '/home/projects/stackblitz-starters-xjwz65/node_modules/chai/chai.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/chai` if it exists or add a new declaration (.d.ts) file containing `declare module 'chai';`

17 import * as chai from 'chai';
                         ~~~~~~

I don't think I should be forced to install some unrelated type package to use Vitest.

Reproduction

• https://stackblitz.com/edit/stackblitz-starters-xjwz65
• run npx tsc

System Info

[stackblitz output]

  System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vite: ^5.4.2 => 5.4.2 
    vitest: ^2.0.5 => 2.0.5

Used Package Manager

npm

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.