update node 24 and dependencies

[MarieComet]

Note

Medium Risk
Wide dependency and toolchain upgrades can change build output and lint rules; Sass API changes are localized but affect all compiled CSS.

Overview
Bumps the theme toolchain to Node 24.16 and Yarn 4.15 (Volta) and refreshes a large set of npm dev/runtime dependencies (WordPress packages, webpack 5, eslint 10, stylelint 17, sass, imagemin, etc.), including @beapi/be-a11y v2.

ESLint moves from legacy .eslintrc to flat config in eslint.config.mjs (WordPress recommended + jQuery global). Webpack’s ESLintPlugin no longer passes overrideConfigFile, so it picks up the new flat config.

Sass mixins/functions are updated for current Dart Sass: global type-of / unitless are replaced with sass:meta and sass:math (meta.type-of, math.is-unitless).

Remaining edits are mostly formatting (.wp-env.json, theme JSON, Yarn SDK shims, grumphp.yml, wp-cli.yml) and minor config style (svgo.config.js semicolon).

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Volta yarn version mismatches packageManager and yarnPath

Medium Severity

The volta.yarn field is set to "4.15.0" but packageManager remains "yarn@4.5.0", and .yarnrc.yml still references .yarn/releases/yarn-4.5.0.cjs (which is the only yarn binary present in the repo). Developers using Volta will get a different yarn version than what Corepack or the yarn binary provides, leading to inconsistent behavior across environments.

Additional Locations (2)

• package.json#L87-L88
• .yarnrc.yml#L1-L2

 

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[francoistibo]

test de virer YARN, ca a tout cassé.
sujet en cours chez Marie dès qu'elle a du temps