Bump esbuild and vitest in /chat-lib

Bumps [esbuild](https://github.com/evanw/esbuild) to 0.25.9 and updates ancestor dependency [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest). These dependencies need to be updated together.


Updates `esbuild` from 0.21.5 to 0.25.9
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2024.md)
- [Commits](evanw/esbuild@v0.21.5...v0.25.9)

Updates `vitest` from 2.1.9 to 3.2.4
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v3.2.4/packages/vitest)

---
updated-dependencies:
- dependency-name: esbuild
  dependency-version: 0.25.9
  dependency-type: indirect
- dependency-name: vitest
  dependency-version: 3.2.4
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]