Adds five theme-aware hero wallpapers: Aurora Clock (aurora + live clock), Dream (static pastel corner glows, featherweight), Mesh (Stripe WebGL gradient), Nebula (flowing aurora shader), Stars (glowing star points). Pick them in Settings → Wallpaper. Mesh/Nebula/Stars are WebGL (heavier; Nebula renders at 0.6x). Builds on v44.72.
Full Changelog: v44.72...v44.73