A dependency audit identified packages in package.json that are either unused, redundant, or placed in the wrong section. Cleaning these up will reduce install size and remove dead weight from the dependency graph.

No source imports found

• Remove unused cookie dependencies #17624
  • cookie
  • js-cookie
  • set-cookie-parser
• Remove unused browser polyfill dependencies #17625
  • element-matches
  • custom-event-polyfill
• Remove unused utility dependencies #17626
  • d3-selection
  • url-parse
  • shell-quote
  • jsdiff
• Remove unused vue-server-renderer #17610

Misplaced dependencies

• Relocate misplaced dependencies from dependencies to devDependencies #17623
  • sinon — test mocking library
  • babel-plugin-module-resolver — Babel plugin, build-time only
  • cross-env — CLI tool used in npm scripts only
  • ts-node — TypeScript runner for dev scripts

Acceptance criteria

• All packages listed under "No source imports found" are absent from package.json
• All packages listed under "Misplace dependencies" are in devDependencies
• CI passes all gates