Tabs, sliders, popups and a dozen more elements in the website builder

A big batch of new elements, and one important fix. First the fix: adding a Link or a Form element could crash the builder and force a restart. That's resolved, and panels are now isolated - if something does go wrong in a side panel, your page and its autosave keep working instead of the whole editor going down. Forms also embed properly now: they used to sit on a grey slab, and they now inherit whatever section you drop them into, with only the fields keeping their own background. The form picker works too, so you choose which of your published forms to show from a dropdown. New elements: Tabs, Slider (arrows, dots and optional autoplay), Accordion and a standalone accordion item, Popup, and Lightbox images that open full-screen on click. Plus the everyday pieces - Divider, Spacer, Icon, Quote, Badge, Social links, and an Embed block whose code you paste in the Settings panel (or a full-size editor) instead of onto the page, so the canvas stays readable. Video backgrounds arrived two ways: a ready-made Video background section, and a Video field in the Backgrounds settings that puts a muted, looping video behind any element you've selected. None of them are sealed widgets: each is ordinary markup you can open in the Navigator, take apart, restyle and rebuild, and they're all visible while you're editing even though they're hidden or collapsed on the live page. Finally, the Interactions tab can now show, hide or toggle any other element on click - give an element an ID, point a button at it, and you've built a popup, a dropdown or a read-more panel out of plain divs. Press Preview to try any of it exactly as visitors will see it.