Fix remaining issues: CDN config, min_staff_rank defaults, blade views

- Centralize all CDN URLs in config('habbo.cdn.*') with env overrides
- Replace hardcoded CDN URLs in 12+ blade views (fancybox, sweetalert2,
  alpinejs, fontsource, fontawesome, html2canvas)
- Fix font-awesome 7.0.0 (non-existent) -> config with 6.7.0 default
- Centralize all hardcoded min_staff_rank defaults (3 and 7) to config
- Add MIN_STAFF_RANK and MIN_STAFF_RANK_LOGIN env variables

app/Http/Middleware/AdminSecurityMiddleware.php

@@ -20,7 +20,7 @@ class AdminSecurityMiddleware
         }
 
         // Check 2: Must have admin rank
-        $minRank = (int) setting('min_staff_rank', 7);
+        $minRank = (int) setting('min_staff_rank', config('habbo.defaults.min_staff_rank'));
         if ($user->rank < $minRank) {
             Log::warning('[Security] Unauthorized API access attempt', [
                 'user_id' => $user->id,