ci: pin React ESLint settings version

[akshitkrnagpal]

Summary

• Sets an explicit React version in the app ESLint flat config
• Avoids eslint-plugin-react runtime version detection, which crashes under ESLint 10's rule context shape
• Keeps the existing ESLint 9 config behavior while making the config compatible with PR Bump eslint from 9.39.4 to 10.4.0 #18's ESLint 10 bump

Test Plan

• npx pnpm@10.33.0 --filter @edgepush/app lint
• npx pnpm@10.33.0 lint
• npx pnpm@10.33.0 typecheck

Related: #18

[akshitkrnagpal]

Review recommendation: approve.

No blocking findings.

Reviewed the single config change in apps/app/eslint.config.mjs. The added flat-config settings block is ordered after the Next config entries, and eslint --print-config confirms it overrides React settings to react.version: "19.2" while preserving the existing import resolver settings.

Checks run locally:

• npx pnpm@10.33.0 install --frozen-lockfile
• npx pnpm@10.33.0 --filter @edgepush/app lint
• npx pnpm@10.33.0 lint
• npx pnpm@10.33.0 typecheck

Also checked GitHub CI: ci is passing.

Note: GitHub would not allow this token to submit a formal approval because the PR is authored by the same account: Review Can not approve your own pull request.