fix(deps): update to React 19

[crgwbr]

No description provided.

[crgwbr]

This is needed since react-helmet-async doesn't officially support React 19 yet. But it seems to work fine. I'm a little concerned that it's a dead project, but I'll probably submit a MR to it anyway.

See staylor/react-helmet-async#239

[silviogutierrez]

@crgwbr : I love this, obviously, and want to move to React 19. But this is... pretty bold. Lot of things still not supporting React 19. Though it may be like react-helmet-async and they actually do just work fine.

Once tests pass I'll give it a go with my main project.

[crgwbr]

@silviogutierrez What would you think of getting rid of the helmet dependency entirely, in lieu of React 19's new metadata tag support? It'd involve some refactoring of how renderPage() works, but I think it'd be possible.

See https://react.dev/blog/2024/12/05/react-19#support-for-metadata-tags

[silviogutierrez]

Not opposed at all, I just have no idea how the tags are injected in the server side part. Given the app shell is rendered outside of React.

When 19 came out I scoured the docs and can't find a single reference. And yet it says it "works".

[silviogutierrez]

For the life of me, I cannot find a single example of how meta tags are "hoisted" on the server render. renderToString and its friends all return a strong that then goes inside your non-react-code app shell.

And yet the docs mention this works with SSR.

[silviogutierrez]

Maybe we have to move to this: https://react.dev/reference/react-dom/server/renderToReadableStream