fix(test): suppress vite swc and jsdom scrollTo warnings

[samuv]

Changes:

• Replace @vitejs/plugin-react-swc with @vitejs/plugin-react in vitest.config.ts and renderer/vite.renderer.config.ts. No SWC plugins were configured, so Vite/Rolldown recommends using the lighter plugin.
• Stub window.scrollTo in vitest.setup.ts alongside the existing jsdom stubs (scrollIntoView, hasPointerCapture, etc.) to silence the "Not implemented: Window's scrollTo() method" noise in test output.

[Copilot]

Pull request overview

This PR reduces test/build noise by switching the React Vite plugin from the SWC variant to the standard plugin (since no SWC-specific configuration is used), and by stubbing window.scrollTo in the Vitest JSDOM environment to silence the “Not implemented” warning.

Changes:

• Replace @vitejs/plugin-react-swc with @vitejs/plugin-react in Vite/Vitest configs.
• Stub window.scrollTo in vitest.setup.ts to suppress JSDOM “Not implemented” output.
• Update dependencies/lockfile accordingly (removing @swc/core packages).

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vitest.setup.ts	Adds a window.scrollTo stub alongside existing JSDOM stubs to silence warnings during tests.
vitest.config.ts	Switches Vitest’s Vite plugin from plugin-react-swc to plugin-react.
renderer/vite.renderer.config.ts	Switches renderer Vite config from plugin-react-swc to plugin-react.
package.json	Replaces the devDependency on @vitejs/plugin-react-swc with @vitejs/plugin-react.
pnpm-lock.yaml	Lockfile updates reflecting the plugin swap and removal of SWC-related packages.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported