## Summary
Fixes the side panel close animation cleanup
(`sidePanelCloseAnimationCompleteCleanup`) never running during the
close transition.
This eventually fixes the issue where in navbar edit mode, clicking on a
nav item sometimes doesn't get selected, the side panel opens but shows
`Select a navigation item to edit` instead of the selected item's
settings. The root cause was stale `isSidePanelClosing` state from a
previous close that wasn't cleaned up, causing the next open to run
cleanup synchronously (without emitting the close event), which
interfered with the navigation item selection flow.
### Root cause
The CSS `transition` on `StyledSidePanelWrapper` used
`${themeCssVariables.animation.duration.normal}s`, which Linaria
converts to a CSS custom property value like `width
var(--t-animation-duration-normal)s`. After CSS variable substitution,
`0.3` and `s` become two separate tokens, not a valid `<time>` dimension
(`0.3s`). The browser rejects the entire transition declaration, falls
back to `all 0s`, and the width change happens instantly with no
`transitionend` event.
### Fix
- Use `calc(var(--t-animation-duration-normal) * 1s)` to properly
construct the `<time>` value (consistent with ~30 other usages in the
codebase).
- Filter `handleTransitionEnd` to only process `width` transitions on
the wrapper element itself, ignoring bubbled child `background-color`
transitions.
## Before
https://github.com/user-attachments/assets/496ccbff-dc96-487d-a994-451dbf2a5165
## After
https://github.com/user-attachments/assets/78255240-1d7d-42cd-9b56-25627613883a
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Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
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