fix: use path-based unique Dagre IDs so convergent scenes appear per branch

src/components/TreeFlow.vue

@@ -38,8 +38,9 @@ function buildFlow(root: PlayerTreeNode) {
 
   function walk(node: PlayerTreeNode, parentId: string | null) {
     if (node.visited) {
+      const dagreId = parentId ? `${parentId}/${node.sceneId}` : node.sceneId
       dagreNodes.push({
-        id: node.sceneId,
+        id: dagreId,
         parent: parentId,
         label: node.label,
         visited: true,
@@ -48,29 +49,29 @@ function buildFlow(root: PlayerTreeNode) {
         lockHint: node.lockHint,
       })
       if (parentId) {
-        dagreEdges.push({ from: parentId, to: node.sceneId, visited: true })
+        dagreEdges.push({ from: parentId, to: dagreId, visited: true })
       }
 
       const unvisited: PlayerTreeNode[] = []
       for (const child of node.children) {
         if (child.visited) {
-          walk(child, node.sceneId)
+          walk(child, dagreId)
         } else {
           unvisited.push(child)
         }
       }
 
       if (unvisited.length > 0) {
-        const mysteryId = `${node.sceneId}__mystery`
+        const mysteryId = `${dagreId}/__mystery`
         dagreNodes.push({
           id: mysteryId,
-          parent: node.sceneId,
+          parent: dagreId,
           label: '? ?',
           visited: false,
           isMystery: true,
           locked: true,
         })
-        dagreEdges.push({ from: node.sceneId, to: mysteryId, visited: false })
+        dagreEdges.push({ from: dagreId, to: mysteryId, visited: false })
       }
     }
   }