feat(flow-editor): 多出口泳道 UI（抽屉开关+出口路由容器+分支增删/恢复单出口）

src/views/flow/admin/def-editor/index.vue

@@ -25,6 +25,7 @@ import {
     createEmptyModel,
     createNotify,
     createParallel,
+    branchesOf,
     findItem,
     removeItem,
     resolveContainer,
@@ -521,7 +522,7 @@ function insertItem(container: string, index: number, kind: "approval" | "parall
     }
 }
 
-/** 添加分支（并行/条件分支容器通用；条件分支同步补一个占位出口名） */
+/** 添加分支（并行/条件分支/多出口审批容器通用；条件分支与出口同步补一个占位出口名） */
 function addBranch(containerUid: string): void {
     const item = findItem(model, containerUid);
     if (!item) return;
@@ -531,18 +532,42 @@ function addBranch(containerUid: string): void {
         const no = item.branches.length + 1;
         item.branches.push([createApproval()]);
         item.outlets.push(`出口${["一", "二", "三", "四", "五", "六"][no - 1] || no}`);
+    } else if (item.kind === "approval" && item.outlets && item.outlets.length >= 2) {
+        const no = (item.branches?.length || 0) + 1;
+        (item.branches = item.branches || []).push([createApproval()]);
+        item.outlets.push(`出口${["一", "二", "三", "四", "五", "六"][no - 1] || no}`);
     }
 }
 
 function removeBranch(containerUid: string, index: number): void {
     const item = findItem(model, containerUid);
-    if (!item || (item.kind !== "parallel" && item.kind !== "condition")) return;
-    if (item.branches.length <= 2) {
+    const isOutlet = item.kind === "approval" && !!(item.outlets && item.outlets.length >= 2);
+    if (!item || (item.kind !== "parallel" && item.kind !== "condition" && !isOutlet)) return;
+    const branches = item.branches!;
+    if (branches.length <= 2) {
         Message.warning("分支至少保留 2 个");
         return;
     }
-    item.branches.splice(index, 1);
-    if (item.kind === "condition") item.outlets.splice(index, 1);
+    branches.splice(index, 1);
+    if (item.kind === "condition" || isOutlet) item.outlets!.splice(index, 1);
+}
+
+/** 退出多出口：仅保留出口①泳道内容，替换为「本节点(去 outlets) + ①泳道节点序列」 */
+function exitOutlets(uid: string): void {
+    const rec = (items: EditorItem[]): boolean => {
+        const i = items.findIndex((it) => it.uid === uid);
+        if (i >= 0) {
+            const node = items[i] as ApprovalNode;
+            const lane0 = node.branches?.[0] || [];
+            const clean: ApprovalNode = { ...node };
+            delete clean.outlets;
+            delete clean.branches;
+            items.splice(i, 1, clean, ...lane0);
+            return true;
+        }
+        return items.some((it) => branchesOf(it)?.some((b) => rec(b)) || false);
+    };
+    rec(model.list);
 }
 
 provide<EditorCtx>(EDITOR_CTX, {
@@ -556,6 +581,7 @@ provide<EditorCtx>(EDITOR_CTX, {
     insertItem,
     addBranch,
     removeBranch,
+    exitOutlets,
 });
 
 // ==================== 保存 / 离开 ====================