Upgrade dependencies

[cyanzhong]

No description provided.

[Copilot]

Pull request overview

Updates the project’s JS/TS dependencies (including MarkEdit-related packages and KaTeX) and aligns supporting code/assets to the upgraded versions.

Changes:

• Bumps multiple dependencies in package.json and refreshes yarn.lock accordingly.
• Updates KaTeX CSS selectors/version string for the newer KaTeX release.
• Adjusts a settings helper return type and a test mock typing.

Reviewed changes

Copilot reviewed 4 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Upgrades dependency versions (linting, build tooling, MarkEdit packages, KaTeX, etc.).
yarn.lock	Updates resolved versions/URLs/hashes to reflect the upgraded dependency graph.
styles/katex.css	Aligns KaTeX CSS selectors and embedded version to the new KaTeX release.
src/support/settings.ts	Refactors toObject typing/return behavior used to read user settings.
tests/search.test.ts	Tweaks test mock initialization affecting TypeScript inference.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.