Changes which were needed after the upgrade:
- Replace vite-plugin-virtual (vite 8 incompatible) with vite's
built-in `define` for the buildTimeConfig injection
- tsconfig: drop deprecated `baseUrl` (TS 5+ resolves `paths`
relative to tsconfig)
- Vitest 4: import `defineConfig` from `vitest/config` so `test`
is valid in vite configs
- Zod 4: rename `.errors` to `.issues`, make `ZodSchema` a
type-only import, drop the removed `SafeParseReturnType`
- Tighten/loosen generic casts in localStore to match stricter
zod 4 inference
- ESLint 9 `no-useless-assignment`: remove redundant initializers
and dead reassignments; disable the rule where Svelte's reactive
blocks confuse the analyser
- Svelte/eslint `prefer-svelte-reactivity`: disable for legacy
Svelte usages of URL / Set
- Misc naming-convention and prefer-const fixes
Instead of relying on a `apiVersion` config variable that has to be
changed and semver respected we use a deployment id that is new on each
deployment to do cache busting
In case of a `ResponseParseError` instead of comparing the versions of
httpd and the web client strictly, we should make sure to check if httpd
fulfills the web clients version requirement (to be the same major
version) and else fallback to a more verbose error about the different
versions.
Georgios Jason Efstathiou