Less queries

[geichelberger]

Filter-driven reloads are now centralized to prevent multiple data
fetches at once. Further, added a feature to cancel ongoing requests and
ensure that older responses don’t replace newer data.

After applying filters, there’s a temporary pause on auto-refresh to
prevent interruptions while users are still filtering.

Removed duplicate fetch behavior in search/filter apply logic by
avoiding page-navigation fetch plus manual reload in the same
interaction.

[github-actions]

Use docker or podman to test this pull request locally.

Run test server using develop.opencast.org as backend:

podman run --rm -it -p 127.0.0.1:3000:3000 ghcr.io/opencast/admin-interface:pr-1542

Specify a different backend like stable.opencast.org:

podman run --rm -it -p 127.0.0.1:3000:3000 -e PROXY_TARGET=https://stable.opencast.org ghcr.io/opencast/admin-interface:pr-1542

It may take a few seconds for the interface to spin up.
It will then be available at http://127.0.0.1:3000.
For more options you can pass on to the proxy, take a look at the README.md.

[github-actions]

This pull request is deployed at test.admin-interface.opencast.org/1542/2026-04-03_14-43-49/ .
It might take a few minutes for it to become available.

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[Arnei]

Reads sound to me and works from my testing. I would like to see a brief comment in the code that explains the intent behind these functions (basically what you already wrote in the commit message).

[geichelberger]

@Arnei, is there a way to resolve the conflicts without reverting those changes? 0eff28d
We need the synchronization in the layer above. Or should that be done at the redux level?

[Arnei]

I made the changes before looking at this PR. It could arguably be fine to revert them?

Not sure how this could be done at the redux level. You'd still have to have state somehow, but could you still keep that in refs? Would you want to use redux state? I don't know.

[gregorydlogan]

We're staring down the barrel of having 19 move to the legacy release slot. Are we wanting to get this into 19, or leave it for 20+?

[geichelberger]

Changed the PR target to r/20.x