ESLint v10 update

[coliff]

This pull request introduces several updates focused on modernizing the project's tooling, updating dependencies, and improving configuration files. The most significant changes are the migration to the new flat ESLint config system, dependency upgrades (notably ESLint, TypeScript, Astro, and Bootstrap), and updates to project documentation and settings to reflect these changes.

Tooling and Linting Configuration Updates:

• Migrated from the legacy .eslintrc.cjs to the new flat config system by adding eslint.config.js, which uses the latest ESLint, TypeScript, and Astro plugin configurations. This also introduces the globals package for environment globals. (eslint.config.js [1] .eslintrc.cjs [2]
• Updated the Prettier VSCode extension setting to use esbenp.prettier-vscode instead of prettier.prettier-vscode for formatting. (.vscode/settings.json .vscode/settings.jsonL3-R3)

Dependency and Environment Upgrades:

• Upgraded key dependencies and development tools: ESLint to v10.2.0, TypeScript to v5.9.0, Astro to v6.1.3, Bootstrap to v5.3.8, and Node to v22.22.2. Updated related config in package.json and documentation. (package.json [1] AGENTS.md [2]

Documentation and Rule Updates:

• Renamed and updated the general rules documentation file to AGENTS.md, reflecting new versions for ESLint, Node, and Bootstrap, and clarifying project standards. (AGENTS.md AGENTS.mdL1-L14)
• Added "htmlhint" to the spelling allowlist in .cspell.json and enabled the frame-title-require rule in .htmlhintrc for improved accessibility linting. (.cspell.json [1] .htmlhintrc [2]

Minor Code and Behavior Adjustments:

• Changed the Plausible analytics script in Layout.astro to load asynchronously with lower fetch priority and added the is:inline attribute. (src/layouts/Layout.astro src/layouts/Layout.astroL25-R25)
• Simplified the editor.on('change') handler in app.js by removing the unused event parameter. (src/scripts/app.js src/scripts/app.jsL109-R109)

[Copilot]

Pull request overview

This PR modernizes the project’s tooling by upgrading core dev dependencies (notably ESLint/TypeScript/Astro) and migrating ESLint to the new flat config format, along with a few small config and site tweaks.

Changes:

• Upgraded ESLint to v10 and migrated from .eslintrc.cjs to eslint.config.js (flat config), adding @eslint/js and globals.
• Upgraded key dependencies and tightened Node requirements (Volta + engines), plus refreshed related docs/settings.
• Minor adjustments to site layout/script loading and linting rules (HTMLHint accessibility rule enabled).

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
eslint.config.js	Introduces flat ESLint config for JS/TS/Astro.
.eslintrc.cjs	Removes legacy ESLint config.
package.json	Upgrades ESLint/TS/Astro and updates Node requirements.
package-lock.json	Locks upgraded dependency graph.
AGENTS.md	Updates documented project standards/versions.
.vscode/settings.json	Updates default formatter extension ID for Prettier.
.htmlhintrc	Enables frame-title-require for improved accessibility linting.
.cspell.json	Adds htmlhint to the spelling allowlist.
src/layouts/Layout.astro	Adjusts Plausible script loading attributes.
src/scripts/app.js	Removes unused parameter from editor change handler.

Comments suppressed due to low confidence (1)

AGENTS.md:12

• The previous guidance included an explicit accessibility requirement (“All HTML must be accessible.”), but that statement is removed here while the repo is also enabling additional accessibility linting rules (e.g., frame-title-require). Consider restoring the accessibility requirement (or replacing it with an equivalent statement) so the documented standards remain consistent.

[gemini-code-assist]

Code Review

This pull request primarily focuses on upgrading the project's development environment and core dependencies. Key updates include migrating to ESLint v10.2.0 with a new flat configuration file, upgrading Astro to v6.1.3, and updating TypeScript to v5.9.0. The Node.js engine and Volta versions have also been bumped to v22.22.2. Other changes include refining the HTMLHint and CSpell configurations, updating VS Code formatter settings, and performing minor code cleanups in the layout and editor scripts. I have no feedback to provide as there were no review comments.