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/api/src/router/resource-summary-read-procedure-support.ts

@@ -6,6 +6,7 @@ import {
   type AssignmentSlice,
 } from "@capakraken/engine";
 import { VacationStatus } from "@capakraken/db";
+import { round1, averagePerWorkingDay } from "@capakraken/shared";
 import type { CalculationRule, SpainScheduleRule, WeekdayAvailability } from "@capakraken/shared";
 import { z } from "zod";
 import {
@@ -106,13 +107,6 @@ function summarizeResolvedHolidaySummary(holidays: Array<ReturnType<typeof forma
   };
 }
 
-function round1(value: number): number {
-  return Math.round(value * 10) / 10;
-}
-
-function averagePerWorkingDay(totalHours: number, workingDays: number): number {
-  return workingDays > 0 ? round1(totalHours / workingDays) : 0;
-}
 
 export async function resolveResponsiblePersonName(
   ctx: ResourceSummaryReadContext,