refactor: establish brand motion system

apps/web/src/styles/loading-states.css

@@ -1 +1 @@
-.loading-grid{display:grid;gap:18px}.loading-card{position:relative;overflow:hidden;min-height:210px;padding:25px;border:1px solid var(--border-soft);border-radius:16px;background:var(--surface)}.loading-card:after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(100deg,transparent 20%,var(--surface-soft) 48%,transparent 76%);animation:loading-sweep 1.4s ease-in-out infinite}.loading-line{display:block;width:100%;height:13px;margin-top:18px;border-radius:999px;background:#e7ede7}.loading-line--label{width:22%;height:9px;margin-top:0;background:#d8e2d8}.loading-line--title{width:48%;height:30px;margin-top:24px}.loading-line--short{width:64%}.moderation-list[aria-busy="true"]{cursor:progress}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}@keyframes loading-sweep{to{transform:translateX(100%)}}@media(prefers-reduced-motion:reduce){.loading-card:after{animation:none;background:#f7faf533}}
+.loading-grid{display:grid;gap:18px}.loading-card{position:relative;overflow:hidden;min-height:210px;padding:25px;border:1px solid var(--border-soft);border-radius:16px;background:var(--surface)}.loading-card:after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(100deg,transparent 20%,var(--surface-soft) 48%,transparent 76%);animation:loading-sweep calc(var(--motion-signal) - 1000ms) ease-in-out infinite}.loading-line{display:block;width:100%;height:13px;margin-top:18px;border-radius:999px;background:#e7ede7}.loading-line--label{width:22%;height:9px;margin-top:0;background:#d8e2d8}.loading-line--title{width:48%;height:30px;margin-top:24px}.loading-line--short{width:64%}.moderation-list[aria-busy="true"]{cursor:progress}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}@keyframes loading-sweep{to{transform:translateX(100%)}}@media(prefers-reduced-motion:reduce){.loading-card:after{animation:none;background:#f7faf533}}