Migrate eslint config

[DaltheCow]

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[nm-red-hat-upstream-automation-bot]

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[nm-red-hat-upstream-automation-bot]

📦 Build Artifacts Available
The build artifacts (.whl and .tar.gz) have been successfully generated and are available for download: https://github.com/neuralmagic/guidellm/actions/runs/16010610786/artifacts/3444602311.
They will be retained for up to 30 days.

[Copilot]

Pull Request Overview

This PR overhauls the project’s ESLint setup to the new Flat ESLint format with TypeScript-aware and Next.js plugins, adjusts TypeScript and test configuration, and applies related import cleanups and minor code tweaks across the codebase.

• Migrated eslint.config.js to Flat ESLint with @typescript-eslint, @next/eslint-plugin-next, and Prettier integrations
• Expanded tsconfig.test.json include patterns and updated environment files and scripts to align with lint and test changes
• Cleaned up import orders, removed duplicate lines, and refactored small utilities (e.g., removed unnecessary async, cast event values)

Reviewed Changes

Copilot reviewed 34 out of 36 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tsconfig.test.json	Broke out .ts and .tsx patterns, added test helper and mocks
eslint.config.js	Switched to Flat ESLint config, restructured plugins and rules
package.json	Updated lint script to auto-fix, adjusted dev dependencies
src/ui/lib/store/slices/benchmarks/benchmarks.api.ts	Changed dispatch signature to any, added ESLint disable comment
README.md	Removed detailed setup instructions; replaced with placeholder notice

Comments suppressed due to low confidence (2)

README.md:162

• [nitpick] The README now only contains a placeholder and lacks essential setup and development instructions. Consider restoring or updating the usage guides to help contributors and users get started.

The UI is a WIP, check more recent PRs for the latest updates

tests/ui/unit/utils/interpolation.test.ts:39

• [nitpick] The naming of expected and actual here is semantically reversed—expected holds the interpolated value and actual holds the reference. Consider renaming them (e.g., interpolated and reference) to improve clarity.

  const loopedValuesToTest: { expected: number; actual: number }[] = [];

[nm-red-hat-upstream-automation-bot]

📦 Build Artifacts Available
The build artifacts (.whl and .tar.gz) have been successfully generated and are available for download: https://github.com/neuralmagic/guidellm/actions/runs/16195735865/artifacts/3504294744.
They will be retained for up to 30 days.

[nm-red-hat-upstream-automation-bot]

📦 Build Artifacts Available
The build artifacts (.whl and .tar.gz) have been successfully generated and are available for download: https://github.com/neuralmagic/guidellm/actions/runs/16195794139/artifacts/3504316071.
They will be retained for up to 30 days.