feat: migrate from Node.js/npm to Bun with Vite bundler

[MiltonTulli]

Summary

• Replace npm with Bun as package manager and runtime
• Replace Webpack with Vite as bundler
• Update all scripts to use Bun commands
• Update GitHub Actions workflows to use oven-sh/setup-bun
• Change dev server port from 3030 to 3000
• Replace jsdom with happy-dom for Vitest (ESM compatibility)

Changes

File	Change
package.json	Add packageManager, update scripts, remove eslintConfig
bunfig.toml	New Bun configuration
vite.config.ts	New Vite configuration (replaces webpack.config.js)
index.html	Moved from public/ to root (Vite requirement)
vitest.config.ts	Changed environment to happy-dom
playwright.config.ts	Updated port and commands
scripts/*.sh	Updated to use Bun commands
.github/workflows/*.yml	Migrated from setup-node to setup-bun
README.md, CLAUDE.md	Updated documentation

Removed

• .nvmrc - No longer needed
• package-lock.json - Replaced by bun.lock
• webpack.config.js - Replaced by Vite
• eslintConfig in package.json - Using Biome

Test plan

• bun install - Installs dependencies correctly
• bun start - Dev server runs on port 3000
• bun run build - Production build succeeds
• bun run test:run - All 65 tests pass
• bun run typecheck - No TypeScript errors
• bun run format && bun run lint - No issues

🤖 Generated with Claude Code

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Note

Adopts Bun for package management/runtime and Vite for builds, with corresponding CI/CD and documentation updates.

• Replace npm/Webpack with bun + vite; dev server now on port 3000
• Update GitHub Actions: use oven-sh/setup-bun@v2 and bun install/run in deploy-gh-pages.yml, deploy-pr-preview.yml, e2e.yml, and hash-deploy-build.yml; Playwright installed via bunx
• Keep Node 20 setup only where needed for the custom IPFS deploy action; no functional change to deploy steps
• Docs refreshed (README.md, CLAUDE.md) to Bun/Vite commands; remove .nvmrc

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