Summary panel state retention does not work for collapses/expansions by button

[kv9898]

System details:

Windows 11

Positron and OS details:

Positron Version: 2025.03.0 (system setup) build 97
Code - OSS Version: 1.96.0
Commit: 5e22d6f
Date: 2025-02-25T20:39:11.000Z
Electron: 32.2.6
Chromium: 128.0.6613.186
Node.js: 20.18.1
V8: 12.8.374.38-electron.0
OS: Windows_NT x64 10.0.26100

Interpreter details:

R 4.4.2

Describe the issue:

This is the same as the first bug I reported in #6318. While collapses/expansions triggered by commands are retained now, thanks to #6260 and #6322, those triggered by the button are not retained.

Steps to reproduce the issue:

1. Open any dataset in data explorer
2. Collapse the summary panel by clicking the button
3. Switch to another tab and come back
4. The summary panel is not collapsed

Expected or desired behavior:

The closures by pressing the button/dragging are retained the same way as the command.

Were there any error messages in the UI, Output panel, or Developer Tools console?

No

[petetronic]

Thanks @kv9898 I can reproduce this issue, sending to Triage