fix: fix template initialization order in Config class

- Move template loading after class definition to avoid NameError
- Initialize TEMPLATE_IMAGES, TEMPLATES_CONFIG, and CONTAINER_TEMPLATES after Config class
- Use simple loop instead of calling static methods during class init
- Prevents 'Config is not defined' errors during import

This fixes the circular dependency issue where _build_container_templates()
was trying to reference Config.TEMPLATE_IMAGES while the class was still
being defined.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

config.py

@@ -99,35 +99,10 @@ class Config:
             print(f"[CONFIG] Warnung: Fehler beim Laden von templates.json: {e}", file=sys.stderr)
             return {}
 
-    @staticmethod
-    def _build_container_templates() -> dict:
-        """
-        Baut CONTAINER_TEMPLATES Dictionary aus:
-        1. TEMPLATE_IMAGES (Liste der verfügbaren Images)
-        2. TEMPLATES_CONFIG (Metadaten aus templates.json)
-        """
-        templates = {}
-
-        for image in Config.TEMPLATE_IMAGES:
-            # Extrahiere Typ aus Image-Namen
-            container_type = Config._extract_type_from_image(image)
-
-            # Hole Metadaten aus JSON (falls vorhanden)
-            config = Config.TEMPLATES_CONFIG.get(container_type, {})
-
-            # Verwende JSON-Metadaten oder Fallback
-            templates[container_type] = {
-                'image': image,
-                'display_name': config.get('display_name', container_type.replace('-', ' ').title()),
-                'description': config.get('description', f'Container basierend auf {image}')
-            }
-
-        return templates
-
-    # Dynamisches Template-Loading initialisieren
-    TEMPLATE_IMAGES = _load_template_images.__func__()
-    TEMPLATES_CONFIG = _load_templates_config.__func__()
-    CONTAINER_TEMPLATES = _build_container_templates.__func__()
+    # Temp-Variablen für Template-Loading (werden nach Klasse verarbeitet)
+    TEMPLATE_IMAGES = None
+    TEMPLATES_CONFIG = None
+    CONTAINER_TEMPLATES = None
     
     # ========================================
     # Traefik/Domain-Konfiguration
@@ -215,6 +190,23 @@ class TestingConfig(Config):
     WTF_CSRF_ENABLED = False
 
 
+# Initialisiere Templates NACH Klassendefini tion
+Config.TEMPLATE_IMAGES = Config._load_template_images()
+Config.TEMPLATES_CONFIG = Config._load_templates_config()
+
+# Baue CONTAINER_TEMPLATES aus Templates
+templates = {}
+for image in Config.TEMPLATE_IMAGES:
+    container_type = Config._extract_type_from_image(image)
+    config_meta = Config.TEMPLATES_CONFIG.get(container_type, {})
+    templates[container_type] = {
+        'image': image,
+        'display_name': config_meta.get('display_name', container_type.replace('-', ' ').title()),
+        'description': config_meta.get('description', f'Container basierend auf {image}')
+    }
+Config.CONTAINER_TEMPLATES = templates
+
+
 # Config-Dict für einfaches Laden
 config = {
     'development': DevelopmentConfig,