TUI scroll position resets to top after approving a tool permission prompt

[liqiyian]

What version of Kimi Code is running?

0.29.2

Which open platform/subscription were you using?

Kimi Code (OAuth)

Which model were you using?

K3-256K

What platform is your computer?

Linux (kernel 6.6.119, ChromeOS Crostini container)

What issue are you seeing?

In a long session, whenever a tool permission (approval) prompt appears and I confirm/approve it, the transcript view jumps all the way back to the very top of the conversation, instead of keeping the position I was reading or following new output at the bottom.

What steps can reproduce the bug?

1. Have a session long enough to exceed the terminal viewport.
2. Scroll up to read earlier messages.
3. The agent requests a tool approval; the permission prompt appears.
4. Select an option to approve.
5. After the prompt closes and the UI re-renders, the view is reset to the top of the transcript.

What is the expected behavior?

After the permission prompt closes, the scroll position should be preserved (stay where I was reading), or at least follow new output at the bottom — never reset to the very top.

Additional information

Possibly related to #1487 and #981 (streaming-triggered jumps to top), but the trigger here is specifically the approval dialog close/re-render, not streaming output. Reproducible consistently on every approval.

[liqiyian]

Additional data point: the AskUserQuestion option dialog triggers the same bug. When the dialog pops up, the scroll position stays intact; but the moment I confirm my selection, the transcript jumps to the top. So the trigger is not specific to permission prompts — it seems any modal/prompt close that re-renders the UI resets the scroll position. (Observed on model K3-256K, so not model-specific either.)