Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

apps/web/app/[locale]/home/create-team/_components/create-first-team-form.tsx

@@ -0,0 +1,31 @@
+'use client';
+
+import { CreateTeamAccountForm } from '@kit/team-accounts/components';
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from '@kit/ui/card';
+import { Trans } from '@kit/ui/trans';
+
+export function CreateFirstTeamForm() {
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle>
+          <Trans i18nKey={'teams.createFirstTeamHeading'} />
+        </CardTitle>
+
+        <CardDescription>
+          <Trans i18nKey={'teams.createFirstTeamDescription'} />
+        </CardDescription>
+      </CardHeader>
+
+      <CardContent>
+        <CreateTeamAccountForm submitLabel={'teams.getStarted'} />
+      </CardContent>
+    </Card>
+  );
+}

apps/web/app/[locale]/home/create-team/page.tsx

@@ -0,0 +1,52 @@
+import { redirect } from 'next/navigation';
+
+import { createAccountsApi } from '@kit/accounts/api';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+
+import { AppLogo } from '~/components/app-logo';
+import featuresFlagConfig from '~/config/feature-flags.config';
+import pathsConfig from '~/config/paths.config';
+import { requireUserInServerComponent } from '~/lib/server/require-user-in-server-component';
+
+import { CreateFirstTeamForm } from './_components/create-first-team-form';
+
+async function CreateTeamPage() {
+  const data = await loadData();
+
+  if (data.redirectTo) {
+    redirect(data.redirectTo);
+  }
+
+  return (
+    <div className="flex min-h-screen flex-col items-center justify-center gap-y-8">
+      <AppLogo />
+
+      <CreateFirstTeamForm />
+    </div>
+  );
+}
+
+export default CreateTeamPage;
+
+async function loadData() {
+  await requireUserInServerComponent();
+
+  if (!featuresFlagConfig.enableTeamsOnly) {
+    return { redirectTo: pathsConfig.app.home };
+  }
+
+  const client = getSupabaseServerClient();
+  const api = createAccountsApi(client);
+  const accounts = await api.loadUserAccounts();
+
+  if (accounts.length > 0 && accounts[0]?.value) {
+    return {
+      redirectTo: pathsConfig.app.accountHome.replace(
+        '[account]',
+        accounts[0].value,
+      ),
+    };
+  }
+
+  return { redirectTo: null };
+}