Remove dead code and unused dependencies

[tmshv]

Tasks

1. Remove @babel/helper-call-delegate from package.json
   Deprecated Babel internal (v7.12.13, 2021). Never imported anywhere.

2. Delete src/components/Meta/index.tsx
   Uses Pages Router next/head — does nothing in App Router. Not imported anywhere.

3. Delete src/lib/image.ts
   Contains resizeImage which is a no-op (returns src unchanged). Only used by the dead Meta component.

4. Delete typings/next-active-link.d.ts
   Declares module next-link-active that is never imported. Uses deprecated React.SFC.

5. Remove !document guard in src/components/Menu/Burger.tsx:13
   Inside useEffect, document is always defined. Dead code branch.