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

packages/i18n/src/client-provider.tsx

@@ -0,0 +1,46 @@
+'use client';
+
+import type { ReactNode } from 'react';
+
+import type { AbstractIntlMessages } from 'next-intl';
+import { NextIntlClientProvider } from 'next-intl';
+
+const isDevelopment = process.env.NODE_ENV === 'development';
+
+interface I18nClientProviderProps {
+  locale: string;
+  messages: AbstractIntlMessages;
+  children: ReactNode;
+  timeZone?: string;
+}
+
+/**
+ * Client-side provider for next-intl.
+ * Wraps the application and provides translation context to all client components.
+ */
+export function I18nClientProvider({
+  locale,
+  messages,
+  timeZone = 'UTC',
+  children,
+}: I18nClientProviderProps) {
+  return (
+    <NextIntlClientProvider
+      locale={locale}
+      messages={messages}
+      timeZone={timeZone}
+      getMessageFallback={(info) => {
+        // simply fallback to the key as is
+        return info.key;
+      }}
+      onError={(error) => {
+        if (isDevelopment) {
+          // Missing translations are expected and should only log an error
+          console.warn(`[Dev Only] i18n error: ${error.message}`);
+        }
+      }}
+    >
+      {children}
+    </NextIntlClientProvider>
+  );
+}