feat(timeline): add pulse animation for in-flight drag mutations

Allocation bars that have active optimistic overrides (post-drag,
awaiting server confirmation) now pulse subtly via animate-pulse.
The pending set is derived from the existing optimisticAllocations
map keys, requiring no additional state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/application/src/use-cases/dashboard/shared.ts

@@ -1,4 +1,5 @@
-export const MILLISECONDS_PER_DAY = 86_400_000;
+export { MILLISECONDS_PER_DAY } from "@capakraken/shared";
+import { MILLISECONDS_PER_DAY } from "@capakraken/shared";
 
 export function calculateInclusiveDays(startDate: Date, endDate: Date): number {
   return (endDate.getTime() - startDate.getTime()) / MILLISECONDS_PER_DAY + 1;