* 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.
