Faster generation feedback and richer template pages

SlideDrift now shows visible generation progress earlier.

When a carousel is being created or remixed, the editor can show placeholder slides, preview structure, and completed slide content as it arrives instead of waiting for the full deck to finish. For higher-quality remix runs, finished slides can appear progressively while the rest of the carousel continues rendering.

The editor layout is also easier to use when panels are open. The canvas now reserves space for the properties panel on larger screens, and the panel shifts into a more usable lower position on smaller screens so slide navigation and editing controls stay reachable.

Public template browsing has been expanded. Global starter templates can now have dedicated detail pages with structure, use cases, slide counts, related designs, and a clearer path from preview to starting with that template.

Template previews also use cached slide images more reliably and handle light and dark themes more cleanly across template cards, preview modals, and public template detail pages.