feat(world): add persistent citizen simulation with needs, jobs, and social features

- Adds Character model with survival needs (hunger, thirst, energy) and state machine
- Implements city:tick world ticker for offline progression every minute
- Adds city territory expansion and building construction system
- Introduces job economy, inventory, and transaction audit trail
- Adds social graph (friends, marriage, children) and character chat
- Implements admin approval workflow for new registrations
- Adds hospital admission system for traffic accidents
- Includes comprehensive feature tests and world seeders

app/Http/Controllers/Web/LanguageController.php

@@ -36,6 +36,14 @@ class LanguageController extends Controller
 
         // Persist the cookie preference (1 year) used on subsequent visits.
         $response = back();
+        $previousPath = (string) parse_url($response->getTargetUrl(), PHP_URL_PATH);
+
+        // The 3D viewer fetches /city/data via XHR, which can become the
+        // session's "previous URL" and would dump the user on raw JSON.
+        if ($previousPath === '/city/data') {
+            $response = redirect()->route('city.viewer');
+        }
+
         $response->withCookie(cookie('city10-locale', $locale, 60 * 24 * 365, '/', null, false, true));
 
         return $response;