Dependency Updates

[michaelahern]

No description provided.

[Copilot]

Pull Request Overview

This PR updates project dependencies to their latest versions and improves array access validation in the client code.

• Updates TypeScript from version 5.8 to 5.9
• Updates @eslint/markdown from version 6 to 7
• Replaces array length check with direct element existence check for safer array access

Reviewed Changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
package.json	Updates TypeScript and ESLint markdown plugin to newer versions
src/client.ts	Improves array access safety by checking element existence directly

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