首页工作流节点引用多选与保存回显完善：isMultiParameter 全链路透传 + valueSource 数组化/label + 旧 DSL 兼容

- isMultiParameter 节点级开关从节点库透传至引用下拉，支持多选勾选/去重/逐条删除/清空
- valueSource 契约统一为数组并补 label（节点名.字段中文名），覆盖用户引用、表单展示标记与旧 DSL 单对象
- ModelField 递归透传 multi，object/array 嵌套子字段同样支持多选
- 保存/回显兼容旧 DSL 单对象 valueSource，重开自动升级为数组
- modelRequestParamsPath 每项新增 label 字段，后端按 path 重组请求参数

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

src/views/home/components/WorkflowFormCard.vue

@@ -229,14 +229,20 @@ const getVisibleFields = (node: any): any[] => {
 	return collectHomeFormFields(node);
 };
 
-// 引用来源展示：valueSource.nodeId 定位上游节点名 + 字段
+// 引用来源展示：valueSource 统一数组 [{ nodeId, field }]（兼容旧 DSL 单对象），逐项定位上游节点名 + 字段
 const getSourceDisplay = (field: any): string => {
 	const vs = field?.valueSource;
 	if (!vs || typeof vs !== 'object') return '';
+	const arr = Array.isArray(vs) ? vs : [vs];
 	const nodes = props.detail?.nodeInputParams || [];
-	const srcNode = nodes.find((n: any) => String(n?.id) === String(vs.nodeId));
-	const nodeName = srcNode?.name || srcNode?.nodeName || (vs.nodeId ? `节点 ${vs.nodeId}` : '上游节点');
-	return vs.field ? `${nodeName} · ${vs.field}` : nodeName;
+	const parts = arr
+		.filter((r: any) => r && typeof r === 'object')
+		.map((r: any) => {
+			const srcNode = nodes.find((n: any) => String(n?.id) === String(r.nodeId));
+			const nodeName = srcNode?.name || srcNode?.nodeName || (r.nodeId ? `节点 ${r.nodeId}` : '上游节点');
+			return r.field ? `${nodeName} · ${r.field}` : nodeName;
+		});
+	return parts.join('，');
 };
 
 const isFileField = (field: any): boolean => {