refactor: upgrade ESLint 9→10 and simplify React lint toolchain

- Upgrade eslint and @eslint/js to v10
- Replace eslint-plugin-react-x + eslint-plugin-react-dom + eslint-plugin-react-hooks
  with unified @eslint-react/eslint-plugin
- Raise dev Node.js requirement to ^22.13.0 || >=24 (runtime packages unaffected)
- Add .npmrc with engine-strict=true
- Move all @eslint-react rule overrides to eslint.config.js,
  eliminating plugin-specific inline eslint-disable comments
- Fix real issues caught by new rules: useless assignments,
  leaked setTimeout, ref naming, useState setter naming

packages/core/src/utils/autoFixer.ts

@@ -19,7 +19,7 @@ const log = console.log.bind(console, chalk.yellow('[autoFixer]'))
  * - etc.
  */
 export function normalizeResponse(response: any, tools?: Map<string, PageAgentTool>): any {
-	let resolvedArguments = null as any
+	let resolvedArguments: any
 
 	const choice = (response as { choices?: Choice[] }).choices?.[0]
 	if (!choice) throw new Error('No choices in response')