chore(deps): audit fix

[zettca]

• bump deps with vulns with npm audit fix
• force-bump next + postcss
• bump vitest & storybook

[Copilot]

Pull request overview

This PR updates dependency versions to address security vulnerabilities via npm audit fix, including a forced upgrade of next (used by the docs app) and postcss.

Changes:

• Bumped apps/docs to next@^16.2.9.
• Added an npm overrides entry intended to force a postcss version for next.
• Refreshed package-lock.json with the resulting dependency graph updates.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
package.json	Adds an overrides rule to force next’s postcss version.
apps/docs/package.json	Upgrades next for the docs site to a newer major version.
package-lock.json	Updates the lockfile to reflect dependency resolution after audit fixes and upgrades.