fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

src/Application/Admin/ValueObjects/NavigationItem.php

@@ -4,22 +4,40 @@ declare(strict_types=1);
 
 namespace App\Application\Admin\ValueObjects;
 
+use App\Framework\Icon\Icon;
+
 final readonly class NavigationItem
 {
     public function __construct(
         public string $name,
         public string $url,
-        public ?string $icon = null,
+        public Icon|string|null $icon = null,
         public bool $isActive = false
     ) {
     }
 
+    /**
+     * Get icon as Icon object
+     */
+    public function getIcon(): ?Icon
+    {
+        if ($this->icon === null) {
+            return null;
+        }
+
+        if ($this->icon instanceof Icon) {
+            return $this->icon;
+        }
+
+        return Icon::fromString($this->icon);
+    }
+
     public static function fromArray(array $data): self
     {
         return new self(
             name: $data['name'] ?? '',
             url: $data['url'] ?? '',
-            icon: $data['icon'] ?? null,
+            icon: $data['icon'] ?? null, // Can be string or Icon
             isActive: $data['is_active'] ?? false
         );
     }
@@ -29,7 +47,7 @@ final readonly class NavigationItem
         return [
             'name' => $this->name,
             'url' => $this->url,
-            'icon' => $this->icon,
+            'icon' => $this->icon instanceof Icon ? $this->icon->toString() : $this->icon,
             'is_active' => $this->isActive,
         ];
     }