complete story 1.3 with qa test (please not that the previous commit msg was wrong the previous commit was story 1.2

routes/web.php

@@ -8,6 +8,20 @@ Route::get('/', function () {
     return view('welcome');
 })->name('home');
 
+Route::get('/language/{locale}', function (string $locale) {
+    if (! in_array($locale, ['ar', 'en'])) {
+        abort(400);
+    }
+
+    session(['locale' => $locale]);
+
+    if (auth()->check()) {
+        auth()->user()->update(['preferred_language' => $locale]);
+    }
+
+    return redirect()->back();
+})->name('language.switch');
+
 Route::middleware(['auth', 'active'])->group(function () {
     // Admin routes
     Route::middleware('admin')->prefix('admin')->group(function () {