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/content/documentation/authentication/email-password.mdoc

@@ -37,7 +37,7 @@ const result = await signUpAction({
 'use server';
 
 import { enhanceAction } from '@kit/next/actions';
-import { z } from 'zod';
+import * as z from 'zod';
 
 const SignUpSchema = z.object({
   email: z.string().email(),

apps/web/content/documentation/authentication/magic-links.mdoc

@@ -81,7 +81,7 @@ export function MagicLinkForm() {
 
 import { enhanceAction } from '@kit/next/actions';
 import { getSupabaseServerClient } from '@kit/supabase/server-client';
-import { z } from 'zod';
+import * as z from 'zod';
 
 export const sendMagicLinkAction = enhanceAction(
   async (data) => {

apps/web/content/documentation/authentication/oauth-providers.mdoc

@@ -102,7 +102,7 @@ export function OAuthButtons() {
 
 import { enhanceAction } from '@kit/next/actions';
 import { getSupabaseServerClient } from '@kit/supabase/server-client';
-import { z } from 'zod';
+import * as z from 'zod';
 
 const OAuthProviderSchema = z.enum([
   'google',