feat(flow-editor): convert 双向支持多出口审批（命名出边⇄出口泳道）

src/views/flow/admin/def-editor/convert.ts

@@ -73,7 +73,18 @@ export function toContentJson(model: EditorModel): DefJson {
                 if (item.deadlineHours) node.deadlineHours = item.deadlineHours;
                 nodes.push(node);
                 linkTo(id);
-                cursor = id;
+                if (item.outlets && item.outlets.length >= 2 && item.branches) {
+                    // 多出口（2026-10-03 P2）：APPROVAL 的多条命名出边即按钮选路，
+                    // 分支尾隐式汇合到后继（与条件分支容器完全同构）
+                    const tails: string[] = [];
+                    item.branches.forEach((branch, bi) => {
+                        tails.push(...walk(branch, id, item.outlets![bi]));
+                    });
+                    cursor = null;
+                    pending = tails;
+                } else {
+                    cursor = id;
+                }
                 return;
             }
             if (item.kind === "notify") {
@@ -323,11 +334,39 @@ export function fromContentJson(def: any): ParsedDef {
             if (!n) throw new Error(`引用了不存在的节点：${cur}`);
 
             if (n.type === "APPROVAL") {
-                if ((out[cur] || []).length !== 1) {
+                const heads = out[cur] || [];
-                    throw new Error(`审批节点「${n.name || cur}」的出边必须恰好 1 条`);
+                if (heads.length === 1) {
+                    list.push(toApprovalNode(n));
+                    cur = heads[0];
+                } else if (heads.length >= 2) {
+                    // 多出口审批：出口名=出边 name（按钮文案），复用 CONDITION 的汇合点算法
+                    const mergeId = findMerge(cur);
+                    const branches = heads.map((head) => {
+                        const r = walkList(head, mergeId);
+                        if (r.endedAt !== mergeId) {
+                            throw new Error("多出口审批未汇聚到同一个节点，无法还原为卡片视图");
+                        }
+                        return r.list;
+                    });
+                    const outlets = heads.map((head) => {
+                        const e = edges.find((x) => x.from === cur && x.to === head);
+                        return e && e.name ? String(e.name) : "";
+                    });
+                    if (outlets.some((o) => !o || !o.trim())) {
+                        throw new Error(`多出口审批「${n.name || cur}」的每个出口必须命名（按钮文案）`);
+                    }
+                    const dup = outlets.find((o, i) => outlets.indexOf(o) !== i);
+                    if (dup) {
+                        throw new Error(`多出口审批出口名重复：「${dup}」（按钮文案必须唯一）`);
+                    }
+                    const node = toApprovalNode(n);
+                    node.outlets = outlets;
+                    node.branches = branches.map((b) => (b.length ? b : [createApproval()]));
+                    list.push(node);
+                    cur = mergeId;
+                } else {
+                    throw new Error(`审批节点「${n.name || cur}」出边数非法`);
                 }
-                list.push(toApprovalNode(n));
-                cur = out[cur][0];
             } else if (n.type === "NOTIFY") {
                 if ((out[cur] || []).length !== 1) {
                     throw new Error(`抄送节点「${n.name || cur}」的出边必须恰好 1 条`);