'View All' link on home page is hardcoded and breaks for non-root deployments

**Describe the bug**
When setting LABEL_STUDIO_HOST to a value that isn't on domain root (e.g. http://ls.example.com/subdomain), the 'View All' (projects) link shows a modal with an error.

https://github.com/HumanSignal/label-studio/blob/347408c799939a2a13a7ed422739998aea79d016/web/apps/labelstudio/src/pages/Home/HomePage.tsx#L173

Should probably use `absoluteURL`.

Start in web/apps/labelstudio/src/pages/Home/HomePage.tsx around line 173 and inspect how the “View All” link is built, along with the existing absoluteURL usage. Verify the link under a non-root LABEL_STUDIO_HOST such as http://ls.example.com/subdomain; done means it opens the projects view without an error modal.

Written by the indexing model from the issue text.