fix(app): use the same CSP during tauri dev as tauri build (#3894)

* fix(app): use the same CSP during `tauri dev` as `tauri build`

* chore(app-frontend): make Vite WS CSP policy a bit more strict

* tweak: make Tauri CSP config object readable again

At the cost of some extra code in the Vite config side, but I think it's
worth it.

* chore: fix linter warning in app frontend introduced who knows where else

We need a Git hook to ensure these things aren't pushed only to explode
later on or something.

apps/app-frontend/src/components/ui/Instance.vue

@@ -19,7 +19,6 @@ import { showProfileInFolder } from '@/helpers/utils.js'
 import { handleSevereError } from '@/store/error.js'
 import { trackEvent } from '@/helpers/analytics'
 import dayjs from 'dayjs'
-import { formatCategory } from '@modrinth/utils'
 
 const formatRelativeTime = useRelativeTime()