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/pages/error-page.tsx

@@ -0,0 +1,20 @@
+import {
+  Card,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { useTranslation } from "react-i18next";
+
+export const ErrorPage = () => {
+  const { t } = useTranslation();
+
+  return (
+    <Card className="min-w-xs sm:min-w-sm">
+      <CardHeader>
+        <CardTitle className="text-3xl">{t("errorTitle")}</CardTitle>
+        <CardDescription>{t("errorSubtitle")}</CardDescription>
+      </CardHeader>
+    </Card>
+  );
+};