react-day-picker@8 requires date-fns@^2||^3, which conflicts with the
project's date-fns@^4.1.0. react-day-picker@9 dropped the date-fns peer
dependency entirely (bundles its own date helpers), so `npm i` now resolves
cleanly without --legacy-peer-deps.
- package.json: ^8.10.1 → ^9.0.0
- package-lock.json: updated version/resolved/integrity/peerDependencies
for node_modules/react-day-picker to 9.14.0
Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>