Update GUI dependencies

[tgreenx]

Purpose

This PR proposes to update GUI dependencies with non-breaking changes.

Context

v2026.1 release testing

Running npm audit on current develop branch shows: 19 vulnerabilities (2 low, 6 moderate, 11 high)
After updating non-breaking changes with npm audit fix (this PR), it now shows: 7 vulnerabilities (1 moderate, 6 high)

Note that attempting to update breaking changes with npm audit fix --force will break most unit tests, so this is not done in this PR. For reference, the following packages in package.json are updated when doing so:

@astrojs/node:                   9.5.1  --> 10.1.4
@astrojs/svelte:                 7.2.2  --> 8.1.2
astro:                           5.16.4 --> 6.4.7
@sveltejs/vite-plugin-svelte:    6.2.1  --> 7.1.2
vite:                            7.2.7  --> 8.0.16

Changes

• package-lock.json

How to test this PR

Tests should pass.

[matsduf]

I think package.json should be updated too.

[tgreenx]

I think package.json should be updated too.

This contains the direct dependencies yes, but none of them have non-breaking updates apparently (see my comment in the Context section of the PR's description). package-lock.json contains transitive dependencies, and many of those can be updated with non-breaking updates that still resolve several security issues.

[tgreenx]

@tbleckert Hi, could you have a look at this PR? Do you think we should take care of breaking change updates now such as e.g. Astro version (5.16.4 to 6.4.7)? Thanks!

Missunderstood.