hudozka/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Website for the Art School of Shlisselburg (art.shlisselburg.org). Content is in Russian. Built with Next.js using the Pages Router and Strapi headless CMS as the backend. The project has migrated through Express → Angular 1 → React class components → Next.js; some legacy artifacts remain.

Commands

• npm run dev — dev server with Turbo (next dev --turbo)
• npm run build — production build
• npm run lint — ESLint checks
• npm run format — auto-fix lint issues
• npm run sitemap — generate sitemap.xml
• npm run feed — generate RSS feed
• npm test — run unit tests (Vitest, non-watch mode)

Node 22 required (see mise.toml). Deployed on Vercel.

Git Workflow

Feature branches are named issue-XXX where XXX is the related GitHub issue number.

Code Style

ESLint 9 flat config (eslint.config.js) using FlatCompat from @eslint/eslintrc to bridge eslint-config-next (which doesn't support native flat config in Next.js 15.x). Extends next/core-web-vitals. Enforces: no semicolons, double quotes, 4-space indentation, always-multiline trailing commas, eol-last.

Architecture

Pages Router with SSG/ISR: All pages use getStaticProps/getStaticPaths with 30-second revalidation. The catch-all route pages/[...slug].tsx handles all dynamic content pages.

Data flow: Strapi CMS API (hudozka.tmshv.com) → src/remote/api.ts fetches data via apiGet() generic wrapper → src/remote/factory.ts normalizes CMS responses into app types (src/types.ts) → pages render token-based content blocks. The API layer uses a factory pattern with default-response fallbacks on failure.

Content tokens: Pages are composed of flexible content blocks (tokens): text, image, file, html, youtube, instagram, grid. The Token discriminated union is defined in src/types.ts. Each token type maps to a renderer component.

State management: Valtio for reactive state (src/store/). Theme/accessibility preferences in theme store, playback state in play store. Navigation data passed via React Context (src/context/MenuContext).

Key Directories

• src/components/ — page-level and feature components (folder-per-component with index.tsx + styles.module.css)
• src/ui/ — reusable primitives (Box, Button, Picture, Panel, Overlay, Title, ThemeColor)
• src/remote/ — Strapi API integration (api.ts for fetching, factory.ts for transforms, types.ts for CMS response shapes)
• src/store/ — Valtio stores (theme/accessibility, playback config)
• src/hooks/ — custom hooks (useMobile, useAccessibility, useDarkTheme, useReducedMotion)
• src/lib/ — pure utility functions (date, string, url, image, file helpers)
• src/style/ — global CSS with CSS custom properties for theming
• modules/ — ancillary packages (strapi API client, sync tools, writer); excluded from tsconfig

Styling

CSS Modules (.module.css) for component-scoped styles. Global theme via CSS custom properties in src/style/style.css. No utility CSS framework. Uses classnames package for conditional class composition.

TypeScript

Path alias: @/* → src/*. Strict mode enabled. Target ES6. moduleDetection: "force" in tsconfig (required because Next.js auto-generates .next/types/validator.ts without exports, which breaks isolatedModules). Both @/ and src/ import styles are used in the codebase — prefer @/ for new code.

Accessibility

The site has an accessibility panel with configurable font size (8-48pt), color schemes (5 presets: black-on-white, white-on-black, blue-on-blue, brown-on-yellow, green-on-brown), line height, letter spacing, image toggling, and serif/sans-serif font choice — all managed through the Valtio theme store. The theme store currently applies changes via direct DOM manipulation in a Valtio subscribe() callback (src/store/theme.ts).

Images

Remote images from hudozkacdn.tmshv.com with images.weserv.nl as proxy. Blur hash encoding for progressive loading (uses sharp server-side). Image optimization configured in next.config.ts via remotePatterns.

Testing

Vitest for unit tests. Config in vitest.config.ts with @/ and src/ path aliases. Test files are co-located with source (src/lib/*.test.ts). Currently covers src/lib/ utility functions: array, string, url, file, image, date, text, meta.

Known Legacy / Technical Debt

Active modernization is tracked in GitHub issues #222–#238. Key items:

• pages/_app.tsx is the only class component (extends App). Should be a function component.
• src/types.ts has I-prefix interfaces (IPage, IMenu, etc.) from the Angular era alongside modern type aliases. The tokens field on IPage is any[] despite a proper Token union type existing.
• src/store/theme.ts manipulates DOM directly outside React lifecycle (sets CSS vars on document.documentElement, toggles document.body classes). Has a TODO to fix after App Router migration.
• src/components/YMetrika.jsx is the only .jsx file — currently unused (commented out in _app.tsx).
• Two orphaned .scss files in src/style/ (tape-viewer.scss, vertical-image.scss) — not imported anywhere, no SCSS preprocessor configured.
• Some inline styles in src/components/App/index.tsx should be CSS modules.
• react-use and use-media dependencies are unmaintained; only useToggle and useLockBodyScroll are used from react-use.