refactor: consolidate duplicated code across web and API packages

- Extract shared render helpers (vacation blocks, range overlay, overbooking blink) into renderHelpers.tsx
- Centralize status badge styles and vacation color maps into status-styles.ts
- Extract dragMath.ts utility from useTimelineDrag for reuse
- Split useInvalidatePlanningViews into useInvalidateTimeline (4 queries) + useInvalidatePlanningViews (8 queries)
- Adopt findUniqueOrThrow() and Prisma select constants across API routers
- Add shared fmtEur() helper for API-side money formatting
- Wrap TimelineResourcePanel and TimelineProjectPanel with React.memo
- Fix pre-existing TS2589 deep type errors in TeamCalendar and VacationModal
- 38 files changed, reducing ~400 lines of duplicated code

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/src/components/resources/ResourceDetail.tsx

@@ -4,7 +4,7 @@ import { useState } from "react";
 import Link from "next/link";
 import type { AllocationLike, AllocationReadModel, AllocationWithDetails, Resource, SkillEntry } from "@planarchy/shared";
 import { trpc } from "~/lib/trpc/client.js";
-import { formatDate } from "~/lib/format.js";
+import { formatDate, formatMoney } from "~/lib/format.js";
 import { ResourceModal } from "./ResourceModal.js";
 import { SkillRadarChart } from "./SkillRadarChart.js";
 import { AiSummaryCard } from "./AiSummaryCard.js";
@@ -276,14 +276,14 @@ export function ResourceDetail({ resourceId }: ResourceDetailProps) {
         {canViewCosts && (
           <StatCard
             label="LCR"
-            value={`${(resource.lcrCents / 100).toFixed(0)} ${resource.currency}/h`}
+            value={`${formatMoney(resource.lcrCents, resource.currency)}/h`}
             tooltip="Loaded Cost Rate: fully-loaded hourly cost including salary, benefits, and overhead. Used in budget calculations."
           />
         )}
         {canViewCosts && (
           <StatCard
             label="UCR"
-            value={`${(resource.ucrCents / 100).toFixed(0)} ${resource.currency}/h`}
+            value={`${formatMoney(resource.ucrCents, resource.currency)}/h`}
             tooltip="Unit Cost Rate: the rate charged to the client or project for this resource's time."
           />
         )}
@@ -518,7 +518,7 @@ export function ResourceDetail({ resourceId }: ResourceDetailProps) {
                       {canViewCosts && (
                         <td className="px-4 py-3 text-right text-gray-700">
                           {a.dailyCostCents > 0
-                            ? `${(a.dailyCostCents / 100).toFixed(0)}/d`
+                            ? `${formatMoney(a.dailyCostCents)}/d`
                             : "—"}
                         </td>
                       )}