feat: JSON编辑器增强 - Token映射下拉、字段选项key:value、序列化始终包装type

1. 模型配置弹窗: Token映射三个字段由输入框改为下拉菜单
   - 同步/流式从响应映射取key, 异步从回调响应映射取key
   - 切换返回类型时清空Token映射, 无映射配置时禁用并提示
2. JSON编辑器序列化: 所有节点始终输出{type, value/attrs}格式
   - 容器(object/array)始终{type, attrs}, 标量始终{type, value}
3. 字段配置增强:
   - 对象类型新增"循环生成"开关
   - 下拉控件选项列表改为key:value双输入框
4. 类型注释更新

src/components/json-schema-editor/index.vue

@@ -75,8 +75,9 @@ interface FieldConfig {
 	role?: string;
 	isForm?: boolean;
 	required?: boolean;
+	loop?: boolean;
 	defaultValue?: string | number;
-	options?: string[];
+	options?: Array<{ label: string; value: string }>;
 	constraint?: {
 		minLength?: number; maxLength?: number; pattern?: string;
 		min?: number; max?: number; numberType?: string;
@@ -100,7 +101,7 @@ interface FieldFormData {
 	nodeId: string;
 	jsonType: string;
 	fieldType: string; label: string; description: string; role: string;
-	isForm: boolean; required: boolean; defaultValue: string; options: string[];
+	isForm: boolean; required: boolean; loop: boolean; defaultValue: string; options: Array<{ label: string; value: string }>;
 	constraint: {
 		minLength?: number; maxLength?: number; pattern?: string;
 		min?: number; max?: number; numberType?: string;
@@ -182,11 +183,21 @@ function nodeToValue(node: JsonNodeData): any {
 	else if (node.type === 'boolean') rawValue = node.primitiveValue === true || node.primitiveValue === 'true';
 	else rawValue = String(node.primitiveValue);
 
-	if (node.config && hasAnyConfig(node)) {
-		const dataKey = (node.type === 'object' || node.type === 'array') ? 'attrs' : 'value';
-		return { type: node.type, [dataKey]: rawValue, ...node.config };
+	// 容器类型（object/array）始终输出 { type, attrs, ...config }
+	if (node.type === 'object' || node.type === 'array') {
+		const result: Record<string, any> = { type: node.type, attrs: rawValue };
+		if (node.config && hasAnyConfig(node)) {
+			Object.assign(result, node.config);
+		}
+		return result;
 	}
-	return rawValue;
+
+	// 标量类型也始终输出 { type, value, ...config }
+	const result: Record<string, any> = { type: node.type, value: rawValue };
+	if (node.config && hasAnyConfig(node)) {
+		Object.assign(result, node.config);
+	}
+	return result;
 }
 
 function defaultFormType(jsonType: string): string {
@@ -274,6 +285,7 @@ function formToConfig(form: FieldFormData): FieldConfig {
 	cfg.fieldType = form.fieldType || defaultFormType(form.jsonType);
 	cfg.isForm = form.isForm ?? true;
 	cfg.required = form.required ?? false;
+	cfg.loop = form.loop ?? false;
 	// 非骨架字段：有值才发
 	if (form.description) cfg.description = form.description;
 	if (form.role) cfg.role = form.role;
@@ -299,6 +311,7 @@ function hasAnyConfig(node: JsonNodeData): boolean {
 	if (c.label || c.description || c.role || c.defaultValue) return true;
 	if (c.options?.length) return true;
 	if (c.required) return true;
+	if (c.loop) return true;
 	if (c.isForm === false) return true;
 	if (c.constraint && Object.keys(c.constraint).length > 0) return true;
 	if (c.fieldType && c.fieldType !== defaultFormType(node.type)) return true;
@@ -324,6 +337,7 @@ function openFieldDialog(nodeId: string) {
 			role: cfg.role || '',
 			isForm: cfg.isForm ?? true,
 			required: cfg.required ?? false,
+			loop: cfg.loop ?? false,
 			defaultValue: String(cfg.defaultValue ?? ''),
 			options: cfg.options || [],
 			constraint: cfg.constraint ? { ...cfg.constraint } : {},
@@ -355,6 +369,7 @@ function openAddChildDialog(parentNodeId: string) {
 			role: '',
 			isForm: true,
 			required: false,
+			loop: false,
 			defaultValue: '',
 			options: [],
 			constraint: {},