[{"id": "var_url", "key": "target_url", "type": "url", "label_ar": "رابط الهدف", "label_en": "Target URL", "required": true, "placeholder": "https://example.com"}, {"id": "var_model", "key": "model_id", "type": "select", "options": [{"value": "gpt-4", "label_en": "GPT-4"}, {"value": "gpt-3.5-turbo", "label_en": "GPT-3.5"}], "label_ar": "النموذج", "label_en": "AI Model", "required": true, "default_value": "gpt-3.5-turbo"}]