Feat/new UI (#153)

* wip

* feat: make forms functional

* feat: finalize pages

* chore: remove unused translations

* feat: app context

* feat: user context

* feat: finalize username login

* fix: use correct tab order in login form

* feat: add oauth logic

* chore: update readme and assets

* chore: rename docs back to assets

* feat: favicons

* feat: custom background image config option

* chore: add acknowledgements for background image

* feat: sanitize redirect URL

* feat: sanitize redirect URL on check

* chore: fix dependabot config

* refactor: bot suggestions

* fix: correctly redirect to app and check for untrusted redirects

* fix: run oauth auto redirect only when there is a redirect URI

* refactor: change select color

* fix: fix dockerfiles

* fix: fix hook rendering

* chore: remove translations cdn

* chore: formatting

* feat: validate api response against zod schema

* fix: use axios error instead of generic error in login page

frontend/src/components/layout/layout.tsx

@@ -0,0 +1,20 @@
+import { useAppContext } from "@/context/app-context";
+import { LanguageSelector } from "../language/language";
+
+export const Layout = ({ children }: { children: React.ReactNode }) => {
+  const { backgroundImage } = useAppContext();
+
+  return (
+    <div
+      className="relative flex flex-col justify-center items-center min-h-svh"
+      style={{
+        backgroundImage: `url(${backgroundImage})`,
+        backgroundSize: "cover",
+        backgroundPosition: "center",
+      }}
+    >
+      <LanguageSelector />
+      {children}
+    </div>
+  );
+};