feature/replace-eslint-and-jest

[gcko]

Replace eslint and prettier with Biome. Replace jest with vitest

[Copilot]

Pull request overview

This pull request migrates the project's tooling from ESLint/Prettier/Jest to Biome/Vitest. The changes include removing legacy testing and linting dependencies, adding new configuration files, migrating existing tests to Vitest, creating comprehensive test coverage for previously untested modules, and adding a CI workflow. Additionally, copyright years across all source files are updated to 2026.

Changes:

• Replaced ESLint and Prettier with Biome for linting and formatting
• Migrated from Jest to Vitest for testing with improved test coverage
• Added GitHub Actions CI workflow for automated testing and linting

Reviewed changes

Copilot reviewed 21 out of 23 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
vitest.config.ts	New Vitest configuration file defining test environment and patterns
biome.json	New Biome configuration with comprehensive linting rules and formatting settings
package.json	Updated scripts and dependencies, replacing Jest/ESLint packages with Vitest/Biome
src/utils.spec.ts	Migrated test from Jest to Vitest with improved test cases
src/service_worker.spec.ts	New test file providing coverage for service worker functionality
src/main.spec.ts	New comprehensive test file for main UI bootstrap logic
eslint.config.mjs	Removed Jest globals and prettier plugin reference
jest.config.json	Deleted Jest configuration (replaced by Vitest)
tsconfig.build.json	Updated to exclude vitest.config.ts instead of jest.config.json
.github/workflows/ci.yml	New CI workflow for linting and testing on Node 22 and 24
AGENTS.md	Updated documentation to reflect new tooling
Multiple source files	Copyright year updated from 2024 to 2026
pnpm-workspace.yaml	Added core-js and esbuild to onlyBuiltDependencies
public/manifest.json	Formatting changes only (no functional changes)

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[Copilot]

Pull request overview

Copilot reviewed 21 out of 23 changed files in this pull request and generated no new comments.

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