Add package-lock.json to fix GitHub Pages deployment

[Copilot]

Fixes the GitHub Pages build failure by adding the required package-lock.json file.

Problem

The GitHub Pages workflow in .github/workflows/deploy.yml uses npm ci to install dependencies, but the project only had a bun.lock file. This caused the deployment to fail with:

npm ERR! cipm can only install packages when your package.json and package-lock.json or npm-shrinkwrap.json are in sync

Solution

Generated package-lock.json by running npm install, which creates the exact dependency tree needed for the GitHub Pages workflow to succeed.

Impact

• ✅ GitHub Pages deployment now works with npm ci
• ✅ No breaking changes - existing bun.lock and local Bun usage remain unchanged
• ✅ Dual compatibility: npm for CI/CD, Bun for local development
• ✅ All build steps (npm run lint, npm run build) tested and working

This is a minimal change that only adds the required lock file without modifying any existing code or workflows.

Original prompt

Add package-lock.json file so github pages build succeeds

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