[core] Bump React to 19 (2.0)

[DiegoAndai]

Argos is having trouble with #42824 as that PR was created from the next branch. Recreating here to try to fix argos

[mui-bot]

Netlify deploy preview

• docs/data/base/getting-started/quickstart/quickstart.md
• docs/data/joy/getting-started/installation/installation.md
• docs/data/material/getting-started/installation/installation.md
• docs/data/system/getting-started/installation/installation.md

ImageListItem: parsed: -1.34% 😍, gzip: -1.20% 😍
ToggleButtonGroup: parsed: -1.29% 😍, gzip: -1.19% 😍
MenuList: parsed: -1.30% 😍, gzip: -1.15% 😍
AvatarGroup: parsed: -1.22% 😍, gzip: -1.08% 😍
BottomNavigation: parsed: -1.34% 😍, gzip: -1.20% 😍
Accordion: parsed: -1.12% 😍, gzip: -0.98% 😍
@material-ui/core: parsed: -0.16% 😍, gzip: -0.10% 😍
TextField: parsed: -0.53% 😍, gzip: -0.32% 😍
@material-ui/lab: parsed: -0.28% 😍, gzip: -0.18% 😍
TabList: parsed: -0.79% 😍, gzip: -0.43% 😍
SpeedDial: parsed: -0.80% 😍, gzip: -0.43% 😍
Breadcrumbs: parsed: -0.85% 😍, gzip: -0.45% 😍

Bundle size report

Details of bundle changes (Toolpad)
Details of bundle changes

Generated by 🚫 dangerJS against 31f20ab

[DiegoAndai]

The argos failed test comes from the animated progress bar, looks like one of the demos loaded a bit faster so it's sitting at ~5% instead of 0%

Looks good in the preview: https://deploy-preview-44672--material-ui.netlify.app/material-ui/react-progress/#linear-determinate

[DiegoAndai]

Regarding the Next.js 15.0.4 bump, smoke testing the docs looks good

[aarongarciah]

The docs and demos seem to work just fine.

Amazing work! 🎉

[DiegoAndai]

Here's the release notes for Next.js 15: https://github.com/vercel/next.js/releases/tag/v15.0.0

My main concern would be these changes:

• [Breaking] disable client router cache for page segments vercel/next.js#66039
• [Breaking] Disable automatic fetch caching vercel/next.js#66004
• [Breaking] Update Dynamic APIs to be async vercel/next.js#68812

@mui/docs-infra, what do you think?

[mnajdova]

I couldn't find anything broken 👌

[oliviertassinari]

Is someone monitoring the CI duration? https://www.notion.so/mui-org/KPIs-Engineering-165cbfe7b66080c4bc5dec28d3175c09?pvs=4#5d88baf96cc54470a99ff0414dd64b88

It increased by x2.4 https://app.circleci.com/insights/github/mui/material-ui/workflows/pipeline/overview?reporting-window=last-60-days after December 1st.

---

I looked a bit at where this started, it seems to be this PR. The time it takes to run the visual regression tests:

• Before: 4m https://app.circleci.com/pipelines/github/mui/material-ui/144367/workflows/26011c08-72cf-4022-a276-119f1e755c3b/jobs/777254
• After: 19m https://app.circleci.com/pipelines/github/mui/material-ui/144370/workflows/d5b7164c-53ba-455f-8bc5-95e9eabc7ea4/jobs/777276

[DiegoAndai]

@oliviertassinari I created an issue to track this (#44920), I'll investigate.