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/get-chargeability-overview.ts

@@ -1,5 +1,5 @@
 import type { PrismaClient } from "@capakraken/db";
-import type { WeekdayAvailability } from "@capakraken/shared";
+import { toIsoDate, DAY_KEYS, type WeekdayAvailability } from "@capakraken/shared";
 import {
   isChargeabilityActualBooking,
   isChargeabilityRelevantProject,
@@ -12,16 +12,6 @@ import {
   type DailyAvailabilityContext,
 } from "./holiday-capacity.js";
 
-const DAY_KEYS: (keyof WeekdayAvailability)[] = [
-  "sunday",
-  "monday",
-  "tuesday",
-  "wednesday",
-  "thursday",
-  "friday",
-  "saturday",
-];
-
 export interface GetDashboardChargeabilityOverviewInput {
   includeProposed?: boolean;
   topN: number;
@@ -72,10 +62,6 @@ export interface DashboardChargeabilityOverview {
   month: string;
 }
 
-function toIsoDate(value: Date): string {
-  return value.toISOString().slice(0, 10);
-}
-
 function getDailyAvailabilityHours(
   availability: WeekdayAvailability,
   date: Date,