The upgrade introduced around 50 new linting errors. Fix the
low-hanging fruit and address straightforward violations.
Several of the new rules appear to target patterns intended for newer
React compiler capabilities. Since the project currently runs on
React 18 rather than React 19, disable these rules for now instead of
applying potentially inappropriate changes.
Follow-up work can address the new rules in a dedicated PR, potentially
alongside a future React version upgrade.
Manually upgrade the frontend codebase to ESLint 9.
Update the linting configuration and related code where required to
maintain compatibility with the new major version.
lebaudantoine