Fix : Note position

[Vrishabhsk]

What?

• Closes Re-selecting a hidden block loses its note position #73565
• Fixes an issue where floating note positions could become negative during certain block operations, causing notes to be positioned incorrectly.

Why?

The Notes feature uses @floating-ui/react-dom to position floating comment threads alongside their associated blocks. However, in one scenario the calculated y position was found to become negative:

1. Hidden blocks - When a block with a note is hidden and then reselected

Negative y values cause the floating note to be positioned outside the visible viewport, making it appear as if the note position was "lost".

How?

Changes to packages/editor/src/components/collab-sidebar/hooks.js

• Modified useFloatingThread hook to clamp the y position to a minimum of 0
• Renamed the returned y value from useFloating to floatingY before applying the clamp
• Added Math.max( 0, floatingY ) to ensure the note is never positioned at a negative coordinate

Preview

Screen.Recording.2026-03-10.at.12.59.22.PM.mov

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Co-authored-by: Vrishabhsk <vrishabhsk@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>

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[Mamaduka]

Thanks for working on this, @Vrishabhsk!

Closing based on discussion in #73565 (comment). Only the hidden block issue remains, and it needs a different solution.