- Lightbox lives outside #main-content so HTMX never destroys it
- Gallery dispatches window events to open/close lightbox
- Add hx-history-elt to #main-content so only that element is snapshotted
- Remove view-transition-name to avoid duplicate conflict on history restore
- Close lightbox on navigation via lightbox:close event
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
valknar