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/timeline/ProjectPanel.tsx

@@ -4,6 +4,7 @@ import { clsx } from "clsx";
 import { useEffect, useState } from "react";
 import { AllocationStatus, type StaffingRequirement } from "@planarchy/shared";
 import { trpc } from "~/lib/trpc/client.js";
+import { useInvalidateTimeline } from "~/hooks/useInvalidatePlanningViews.js";
 import { getPlanningEntryMutationId } from "~/lib/planningEntryIds.js";
 import { DateInput } from "~/components/ui/DateInput.js";
 
@@ -89,7 +90,7 @@ function normalizeRole(value: string | null | undefined): string {
 }
 
 export function ProjectPanel({ projectId, onClose }: ProjectPanelProps) {
-  const utils = trpc.useUtils();
+  const invalidateTimeline = useInvalidateTimeline();
 
   const { data: ctx, isLoading } = trpc.timeline.getProjectContext.useQuery(
     { projectId },
@@ -102,29 +103,16 @@ export function ProjectPanel({ projectId, onClose }: ProjectPanelProps) {
   );
 
   const updateMutation = trpc.timeline.updateAllocationInline.useMutation({
-    onSuccess: () => {
-      void utils.timeline.getProjectContext.invalidate();
-      void utils.timeline.getBudgetStatus.invalidate();
-      void utils.timeline.getEntries.invalidate();
-      void utils.timeline.getEntriesView.invalidate();
-    },
+    onSuccess: invalidateTimeline,
   });
 
   const deleteMutation = trpc.allocation.deleteAssignment.useMutation({
-    onSuccess: () => {
-      void utils.timeline.getProjectContext.invalidate();
-      void utils.timeline.getBudgetStatus.invalidate();
-      void utils.timeline.getEntries.invalidate();
-      void utils.timeline.getEntriesView.invalidate();
-    },
+    onSuccess: invalidateTimeline,
   });
 
   const createAssignmentMutation = trpc.allocation.createAssignment.useMutation({
     onSuccess: () => {
-      void utils.timeline.getProjectContext.invalidate();
-      void utils.timeline.getBudgetStatus.invalidate();
-      void utils.timeline.getEntries.invalidate();
-      void utils.timeline.getEntriesView.invalidate();
+      invalidateTimeline();
       setAddingMember(false);
       setResourceSearch("");
     },