There was no linting at all — nothing enforced rules-of-hooks (conditional-hook
crashes) or exhaustive-deps (stale closures) across 125 client components/pages.
Added an ESLint flat config (eslint.config.mjs) scoped to client/, an 'npm run
lint' script, and the devDeps. First run: 0 rules-of-hooks violations (good),
6 errors + 13 exhaustive-deps warnings to work through next.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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