frontend/tsconfig.json

{
  "compilerOptions": {
    /* Language & environment */
    "target": "ES2022",
    "lib": ["ES2022", "DOM", "DOM.Iterable"],
    "module": "ESNext",
    "moduleResolution": "bundler",
    "useDefineForClassFields": true,

    /* React */
    "jsx": "react-jsx",

    /* Strict type checking */
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "exactOptionalPropertyTypes": true,

    /* Module interop */
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "allowImportingTsExtensions": true,

    /* Emit */
    "noEmit": true,   /* Vite owns transpilation */
    "skipLibCheck": true,

    /* Paths */
    "baseUrl": ".",
    "paths": {
      "@/*": ["src/*"]
    }
  },
  "include": ["src"],
  "exclude": ["node_modules", "dist"]
}