Fix 500 when addon has no icon

src/lac/app_dashboard/cards.py

@@ -26,7 +26,7 @@ def get_card_for(title, url, icon_path, description):
 def add_all_addon_cards_to_card_data():
     addons = unix.get_all_addon_modules()
     for addon in addons:
-        card_data.append({"order": 10, "title": addon["name"], "url": addon["url"], "icon_path": f"/static/lac/icons/{addon['id']}.{addon['icon_file_format']}", "description": addon["description"], "keywords": [addon["url"], addon["id"]]})
+        card_data.append({"order": 10, "title": addon["name"], "url": addon["url"], "icon_path": f"/static/lac/icons/{addon['id']}.{addon.get('icon_file_format', '')}", "description": addon["description"], "keywords": [addon["url"], addon["id"]]})
 
 # Only adds predefined system cards to the database not addon cards
 def ensure_all_cards_exist_in_database():