backend: qs and body-parser (array-limit bypass, isBuffer DoS).
frontend: axios 1.17 line (formToJSON recursion DoS, prototype-pollution
gadgets, maxBodyLength bypasses), dompurify, linkify-it and the transitive
set npm audit fix resolves without a major bump.
Left out on purpose: sanitize-html 2.17.7 (its htmlparser2 12 tree is
ESM-only, which Jest 29 cannot load, and the SVG SMIL advisory needs svg
tags none of our sanitizer configs allow), and the tiptap 2->3 and
react-router 6->7 majors (open redirect via <Link> needs a user-controlled
navigation target, which the SPA has none of).