[automated] Apply ESLint and Oxfmt fixes

Addresses review feedback:
https://github.com/Comfy-Org/ComfyUI_frontend/pull/10480#discussion_r2994293950

browser_tests/fixtures/ComfyPage.ts

@@ -347,6 +347,12 @@ export class ComfyPage {
     })
   }
 
+  async idleFrames(count: number) {
+    for (let i = 0; i < count; i++) {
+      await this.nextFrame()
+    }
+  }
+
   async delay(ms: number) {
     return new Promise((resolve) => setTimeout(resolve, ms))
   }

browser_tests/tests/performance.spec.ts

@@ -300,6 +300,36 @@ test.describe('Performance', { tag: ['@perf'] }, () => {
     })
   })
 
+  test('subgraph transition (enter and exit)', async ({ comfyPage }) => {
+    // Load workflow with a subgraph containing 80 interior nodes.
+    // Entering the subgraph unmounts root nodes and mounts all 80 interior
+    // nodes synchronously — this is the bottleneck we're measuring.
+    await comfyPage.workflow.loadWorkflow('subgraphs/large-subgraph-80-nodes')
+
+    await comfyPage.idleFrames(30)
+
+    await comfyPage.vueNodes.enterSubgraph()
+    await comfyPage.vueNodes.waitForNodes(80)
+    await comfyPage.idleFrames(30)
+
+    // Exit back to root graph before measuring a fresh enter/exit cycle
+    await comfyPage.subgraph.exitViaBreadcrumb()
+    await comfyPage.idleFrames(10)
+
+    // Start measuring the enter transition
+    await comfyPage.perf.startMeasuring()
+
+    await comfyPage.vueNodes.enterSubgraph()
+    await comfyPage.vueNodes.waitForNodes(80)
+    await comfyPage.idleFrames(30)
+
+    const m = await comfyPage.perf.stopMeasuring('subgraph-transition-enter')
+    recordMeasurement(m)
+    console.log(
+      `Subgraph enter (80 nodes): ${m.taskDurationMs.toFixed(0)}ms task, ${m.layouts} layouts, TBT=${m.totalBlockingTimeMs.toFixed(0)}ms`
+    )
+  })
+
   test('workflow execution', async ({ comfyPage }) => {
     // Uses lightweight PrimitiveString → PreviewAny workflow (no GPU needed)
     await comfyPage.workflow.loadWorkflow('execution/partial_execution')