Rerender tests correctly

[tbleckert]

Purpose

Fixes #522

Context

When navigating between test results, for example via the History dialog, the view didn’t update with the correct data. The issue was caused by a Svelte component relying on local state, which prevented it from reacting when the incoming data object changed.

Changes

ResultInfo now uses a derived rune instead of local state, which ensures it updates whenever the passed data changes. The history navigation has also been updated to include the language prefix.

How to test this PR

Run a test, then switch to an older one via the History dialog. The displayed data should update immediately and correctly. Also verify that reloading the page shows the same data.

[matsduf]

I see no issues, and when testing the history functions as it should.

[MichaelTimbert]

Bug is fixed. But beware there is some issues when merging with #520 .

[tgreenx]

@tbleckert thanks for the fix. could you fix the conflicts by rebasing this PR?

[marc-vanderwal]

Merged #520 then #523 on a local branch; there were easy-to-fix conflicts. Works as advertised. Thanks!

[MichaelTimbert]

I tested this #523 rebased on #511 (after #520 rebase). I encountered a conflict, but everything works correctly after fixing it.

To resolve the conflict I only remove one
import { languageTag } from '@/paraglide/runtime';
and keep changes line 113 of src/lib/components/DomainTest/History.svelte from #520 :

               <a href={`${import.meta.env.BASE_URL}${languageTag()}/result/${item.id}`} onclick={onClickLink}>
                   {formatDate(item.created_at)}
                </a>

[matsduf]

@marc-vanderwal, @tgreenx and @MichaelTimbert, I will merge this PR.