Initial commit: OAuth IAM Laravel application

Laravel-based OAuth/IAM service with Passport, Vue 3 frontend, and
Docker Compose setup for local and production deployment.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Http/Middleware/SetLocale.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\App;
+use Symfony\Component\HttpFoundation\Response;
+
+class SetLocale
+{
+    private const SUPPORTED = ['es', 'en', 'ca'];
+
+    public function handle(Request $request, Closure $next): Response
+    {
+        $locale = $request->session()->get('locale', config('app.locale'));
+
+        App::setLocale(in_array($locale, self::SUPPORTED, true) ? $locale : config('app.locale'));
+
+        return $next($request);
+    }
+}