ENV-361 expand collapse

[henrikekelof]

No description provided.

[Copilot]

Pull request overview

This PR updates the Collapse component to support more robust expand/collapse behavior, including cancelable slide animations and automatically expanding collapses when navigating to same-page hash targets inside collapsed content.

Changes:

• Refactors slideUp/slideDown to centralize style cleanup and return a timer id, and adds cancelSlideToggle to cancel pending toggles.
• Reworks Collapse initialization/interaction to bind per-toggler handlers, support immediate (non-animated) expansion, and auto-expand parent collapses for same-page #hash navigation (on click and initial load).
• Updates Collapse documentation with clearer required markup, initialization behavior, and the new “link-to-content-inside-collapse” capability.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
packages/envision/src/js/util/slideToggle.js	Adds shared style helper utilities, returns timeout handles from slide toggles, and introduces cancellation support.
packages/envision/src/js/collapse.js	Implements improved toggler handling, immediate open behavior, and hash-target auto-expansion/scrolling.
packages/envision-docs/src/pages/components/collapse.md	Refreshes Collapse docs, examples, required markup, and documents hash-link expansion behavior.

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