[Feature Request] Improve browser and UI interaction performance

**Bug Description**
Interacting with browser and UI is too fucking slow.

**Environment Info**
- Platform: darwin
- Terminal: vscode
- Version: 2.1.236
- Feedback ID: 22e86f54-0bb2-47de-84d2-6efc91fac657

**Errors**
```json
[{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=257 messages=256 range=[202,257))\n at J6w (/$bunfs/root/cli:23180:33903)\n at e8h (/$bunfs/root/cli:23180:26870)\n at Si (/$bunfs/root/cli:2057:21440)\n at Nm (/$bunfs/root/cli:2057:40556)\n at Dy (/$bunfs/root/cli:2057:51493)\n at ii (/$bunfs/root/cli:2057:89195)\n at co (/$bunfs/root/cli:2057:88150)\n at Nt (/$bunfs/root/cli:2057:87971)\n at EBe (/$bunfs/root/cli:2057:84225)\n at gt (/$bunfs/root/cli:2057:6695)","timestamp":"2026-09-07T19:23:48.783Z"}]
```

The issue gives no files or tests; the only concrete entry point is the telemetry error for VirtualMessageList itemKeys/messages length desync in version 2.1.236 on darwin in the VS Code terminal. First try to reproduce the slow browser/UI interaction and the desync error. Done is not well-defined until maintainers narrow the expected performance change or the specific UI bug to fix.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.