Fix collapsed sidebar overlapping the chat history icon in Agentic UI

[sejas]

Related issues

• Fixes STU-2071

When the sidebar is collapsed, the floating "Show sidebar" toggle sits in the bottom-left corner of the main area — directly on top of the chat history icon, making both hard to use.

How AI was used in this PR

AI assisted with the implementation; the change was reviewed and verified manually.

Proposed Changes

• Move the toggle sidebar visibility to the bottom and always visible.
• Bring back the right toggle for preview site pane
  One alternative could be keep the toggle button always under the text box.

Testing Instructions

• Open the Agentic UI with a session that shows the footer controls (chat history + new chat) at the bottom of the panel.
• Collapse the sidebar.
• Expand the sidebar and confirm the footer controls return to their original position.

Before

toggle-sidebar-button-before.mp4

After

toggle-sidebar-button-after.mp4

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing b7087fe vs trunk

app-size

Metric	trunk	b7087fe	Diff	Change
App Size (Mac)	1362.04 MB	1362.03 MB	0.01 MB	⚪ 0.0%

site-editor

Metric	trunk	b7087fe	Diff	Change
load	1066 ms	1071 ms	+5 ms	⚪ 0.0%

site-startup

Metric	trunk	b7087fe	Diff	Change
siteCreation	6474 ms	6966 ms	+492 ms	🔴 7.6%
siteStartup	2389 ms	2398 ms	+9 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[youknowriad]

Why not keep the toggle in the top?

[youknowriad]

For me this feels a bit more hacky, as for the user it's going to mix something that is very global (sidebar toggle) with something very specific a button related to the prompt/chat.

So I think the top position is a more natural position. Yes, it does mix it with the site dropdown but that's more natural, at least for me.

[bcotrim]

LGTM 👍

On	Off

[youknowriad]

If we keep it in the bottom, at least let's remove the space at the left of the site dropdown (that space was probably meant to host the toggle button)

[sejas]

Let's go with Riad's PR #4309 , we can always go back to this PR if we think is necessary.

[sejas]

I added the right preview site toggle to the composer.

Logged in	Logged out