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/project-read-shared.ts

@@ -1,4 +1,4 @@
-import { ProjectStatus } from "@capakraken/shared";
+import { ProjectStatus, toIsoDateOrNull } from "@capakraken/shared";
 import { TRPCError } from "@trpc/server";
 import { fmtEur } from "../lib/format-utils.js";
 import type { TRPCContext } from "../trpc.js";
@@ -47,10 +47,6 @@ export const PROJECT_DETAIL_SELECT = {
   _count: { select: { assignments: true, estimates: true } },
 } as const;
 
-function formatDate(value: Date | null): string | null {
-  return value ? value.toISOString().slice(0, 10) : null;
-}
-
 export function mapProjectSummary(project: {
   id: string;
   shortCode: string;
@@ -65,8 +61,8 @@ export function mapProjectSummary(project: {
     code: project.shortCode,
     name: project.name,
     status: project.status,
-    start: formatDate(project.startDate),
-    end: formatDate(project.endDate),
+    start: toIsoDateOrNull(project.startDate),
+    end: toIsoDateOrNull(project.endDate),
     client: project.client?.name ?? null,
   };
 }
@@ -90,8 +86,8 @@ export function mapProjectSummaryDetail(project: {
     status: project.status,
     budget: project.budgetCents && project.budgetCents > 0 ? fmtEur(project.budgetCents) : "Not set",
     winProbability: `${project.winProbability}%`,
-    start: formatDate(project.startDate),
-    end: formatDate(project.endDate),
+    start: toIsoDateOrNull(project.startDate),
+    end: toIsoDateOrNull(project.endDate),
     client: project.client?.name ?? null,
     assignmentCount: project._count.assignments,
     estimateCount: project._count.estimates,
@@ -134,8 +130,8 @@ export function mapProjectDetail(
     budget: project.budgetCents && project.budgetCents > 0 ? fmtEur(project.budgetCents) : "Not set",
     budgetCents: project.budgetCents,
     winProbability: `${project.winProbability}%`,
-    start: formatDate(project.startDate),
-    end: formatDate(project.endDate),
+    start: toIsoDateOrNull(project.startDate),
+    end: toIsoDateOrNull(project.endDate),
     responsible: project.responsiblePerson,
     client: project.client?.name ?? null,
     category: project.utilizationCategory?.name ?? null,
@@ -147,8 +143,8 @@ export function mapProjectDetail(
       role: assignment.role ?? null,
       status: assignment.status,
       hoursPerDay: assignment.hoursPerDay,
-      start: formatDate(assignment.startDate),
-      end: formatDate(assignment.endDate),
+      start: toIsoDateOrNull(assignment.startDate),
+      end: toIsoDateOrNull(assignment.endDate),
     })),
   };
 }