模型配置响应主体映射保存时直接填充字段中文 label

responseBodyMapping 提交时 value 由空串占位改为对应响应映射字段的中文
label（无 label 时兜底为路径本身），使后端存储即携带展示名，无需前端
workflow 侧再 enrich 补充。

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

src/views/settings/modelConfigV2/component/editModule.vue

@@ -781,6 +781,10 @@ const handleSubmit = async () => {
 
 		submitting.value = true;
 		try {
+			// 响应主体映射的 value 直接填对应字段的中文 label（无 label 时兜底为路径本身），不再用空串占位
+			const responseBodyLabelMap = new Map<string, string>(
+				tokenMappingOptions.value.map((o) => [o.path, o.label || o.path])
+			);
 			const baseParams = {
 				modelName: formData.modelName,
 				modelType: Array.isArray(formData.modelType) ? formData.modelType[formData.modelType.length - 1] : formData.modelType,
@@ -798,7 +802,7 @@ const handleSubmit = async () => {
 				error_message_mapping: Object.keys(formData.error_message_mapping).length > 0 ? formData.error_message_mapping : undefined,
 				responseMapping: Object.keys(formData.responseMapping).length > 0 ? formData.responseMapping : undefined,
 				responseBodyMapping: formData.responseBodyMapping.length > 0
-					? Object.fromEntries(formData.responseBodyMapping.map(k => [k, '']))
+					? Object.fromEntries(formData.responseBodyMapping.map((k) => [k, responseBodyLabelMap.get(k) || k]))
 					: undefined,
 			};