fix: SetLocale reads app_locale cookie first (partial from previous commit)

The SetLocale::resolve() edit was dropped from the previous commit.
Cookie priority is essential for the switcher to actually take effect
— without this the /locale route was setting a cookie that nothing
read.

Now resolve order:
1. app_locale cookie (persistent, survives session regen)
2. session locale
3. auth user.locale
4. tenant.settings.language
5. hard-coded 'ro'

Suite: 306 unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Http/Middleware/SetLocale.php

@@ -25,6 +25,13 @@ class SetLocale
 
     private function resolve(Request $request): string
     {
+        // Cookie wins first — set explicit de utilizator via /locale/{lang},
+        // supraviețuiește regenerării sesiunii și subdomeniilor separate.
+        $cookie = $request->cookie('app_locale');
+        if ($cookie && in_array($cookie, self::SUPPORTED, true)) {
+            return $cookie;
+        }
+
         // Session may not be started yet on early-stage middleware paths.
         if ($request->hasSession()) {
             $session = $request->session()->get('locale');