chore(emcn): drop CountdownRing barrel export + dead toast keyframes

Completes removing what the framer-motion toast redesign orphaned: the
CountdownRing re-export and the zero-reference notification-/toast-* keyframes.

Author: waleedlatif1

apps/sim/app/_styles/globals.css

@@ -844,59 +844,6 @@ input[type="search"]::-ms-clear {
   }
 }
 
-@keyframes notification-enter {
-  from {
-    opacity: 0;
-    transform: translateX(calc(var(--stack-offset, 0px) - 8px)) scale(0.97);
-  }
-  to {
-    opacity: 1;
-    transform: translateX(var(--stack-offset, 0px)) scale(1);
-  }
-}
-
-@keyframes notification-countdown {
-  from {
-    stroke-dashoffset: 0;
-  }
-  to {
-    stroke-dashoffset: 34.56;
-  }
-}
-
-@keyframes notification-exit {
-  from {
-    opacity: 1;
-    transform: translateX(var(--stack-offset, 0px)) scale(1);
-  }
-  to {
-    opacity: 0;
-    transform: translateX(calc(var(--stack-offset, 0px) + 8px)) scale(0.97);
-  }
-}
-
-@keyframes toast-enter {
-  from {
-    opacity: 0;
-    transform: translateX(var(--stack-offset, 0px)) translateY(8px) scale(0.97);
-  }
-  to {
-    opacity: 1;
-    transform: translateX(var(--stack-offset, 0px)) translateY(0) scale(1);
-  }
-}
-
-@keyframes toast-exit {
-  from {
-    opacity: 1;
-    transform: translateX(var(--stack-offset, 0px)) translateY(0) scale(1);
-  }
-  to {
-    opacity: 0;
-    transform: translateX(var(--stack-offset, 0px)) translateY(8px) scale(0.97);
-  }
-}
-
 /* WandPromptBar status indicator */
 @keyframes smoke-pulse {
   0%,

apps/sim/components/emcn/components/index.ts

@@ -169,7 +169,6 @@ export {
 } from './tag-input/tag-input'
 export { Textarea } from './textarea/textarea'
 export { TimePicker, timePickerVariants } from './time-picker/time-picker'
-export { CountdownRing } from './toast/countdown-ring'
 export { ToastProvider, toast, useToast } from './toast/toast'
 export {
   clamp,