fix(web): give sidebar un-settle button a tooltip

[UtkarshUsername]

What Changed

The un-settle button on sidebar threads now shows a tooltip, just like the settle button already does.

Why

The Settle button had a tooltip but its reverse state, Un-settle, did not.

UI Changes

Before:

After:

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

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Note

Low Risk
Cosmetic UI-only change with no behavior, data, or security impact.

Overview
Adds a hover/focus tooltip on the slim sidebar un-settle control so it matches other thread actions.

The button still uses the same click handler, aria-label, and hover styling; it is only wrapped in Tooltip with the copy “Un-settle thread”.

^{Reviewed by Cursor Bugbot for commit c932183. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

[!NOTE]

Add tooltip to un-settle button in SidebarThreadRow

Wraps the un-settle action button with a Tooltip that shows "Un-settle thread" on hover/focus. The button's click handler, aria-label, and styling are unchanged.

^{Macroscope summarized c932183.}