## Config Generated

### Files Created/Updated
- eslint.config.js - ESLint v9 flat config (react, typescript, import-x, a11y)
- .prettierrc - Prettier with Tailwind + organize-imports plugins
- tsconfig.json - Strict TypeScript (extending tsconfig.base.json)
- tsconfig.base.json - Shared compiler options
- tsconfig.build.json - Production build config (incremental)
- tsconfig.test.json - Test environment config
- .editorconfig - Editor settings
- .husky/pre-commit - lint-staged
- .husky/commit-msg - commitlint
- lint-staged.config.js - Per-filetype lint + format
- commitlint.config.js - Conventional commits
- biome.json - (skipped, ESLint+Prettier chosen)
- .github/workflows/ci.yml - CI pipeline (lint, typecheck, test, build)

### Dependencies Installed
- eslint, @eslint/js, typescript-eslint, eslint-plugin-react-hooks
- eslint-plugin-import-x, eslint-plugin-jsx-a11y, eslint-config-prettier
- prettier, prettier-plugin-tailwindcss
- husky, lint-staged, @commitlint/cli, @commitlint/config-conventional
- knip

### Scripts Added
- npm run lint / lint:fix
- npm run format / format:check
- npm run typecheck
- npm run test:ci
- npm run knip
- npm run prepare (husky)

### Validation Results
- Lint: config valid, 0 config errors, 12 pre-existing warnings
- Format: config valid, 8 files would be reformatted
- Typecheck: config valid, 0 errors
- Build: config valid, builds in 3.2s
- Slowest ESLint rule: @typescript-eslint/no-floating-promises (1.8s)

### Conflicts Resolved
- Disabled Prettier formatting rules in ESLint via eslint-config-prettier
- Used @typescript-eslint/no-unused-vars instead of base no-unused-vars
- Relaxed noPropertyAccessFromIndexSignature in tsconfig.test.json

### Notes
- Run `npm run lint:fix && npm run format` to auto-fix the 12 warnings and 8 format issues
- Consider moving @typescript-eslint/no-floating-promises to CI-only for faster local linting
- TypeScript strict mode: Phase 4 (full strict) - all flags active
