FOLLOW-UP: Popover uses onfocus/onblur instead of onfocusin/onfocusout

[adnaan]

Context

This follow-up task was identified during the review of PR #292.

Source PR: #292
Suggested by: @Copilot

Task Description

The popover template uses onfocus/onblur on a wrapper <div>, but native focus/blur events do not bubble. This means when a descendant (the actual trigger element) receives focus, the popover handler won't fire.

File: components/popover/templates/default.tmpl

Fix: Use onfocusin/onfocusout (which do bubble) or move the handlers onto the actual focusable trigger element.

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This issue was automatically created from PR #292 review comments.