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/hooks/useAllocationHistory.ts

@@ -1,6 +1,7 @@
 "use client";
 import { useCallback, useRef, useState } from "react";
 import { trpc } from "~/lib/trpc/client.js";
+import { useInvalidateTimeline } from "./useInvalidatePlanningViews.js";
 import type { AllocationMovedSnapshot } from "./useTimelineDrag.js";
 
 export type { AllocationMovedSnapshot };
@@ -18,7 +19,7 @@ export function useAllocationHistory() {
   const past = useRef<HistoryEntry[]>([]);
   const future = useRef<HistoryEntry[]>([]);
 
-  const utils = trpc.useUtils();
+  const invalidateTimeline = useInvalidateTimeline();
 
   // Configurable max steps from system settings
   const { data: settings } = trpc.settings.getSystemSettings.useQuery(undefined, {
@@ -27,21 +28,11 @@ export function useAllocationHistory() {
   const maxHistory = settings?.timelineUndoMaxSteps ?? DEFAULT_MAX_HISTORY;
 
   const updateMutation = trpc.timeline.updateAllocationInline.useMutation({
-    onSuccess: () => {
-      void utils.timeline.getEntries.invalidate();
-      void utils.timeline.getEntriesView.invalidate();
-      void utils.timeline.getProjectContext.invalidate();
-      void utils.timeline.getBudgetStatus.invalidate();
-    },
+    onSuccess: invalidateTimeline,
   });
 
   const batchShiftMutation = trpc.timeline.batchShiftAllocations.useMutation({
-    onSuccess: () => {
-      void utils.timeline.getEntries.invalidate();
-      void utils.timeline.getEntriesView.invalidate();
-      void utils.timeline.getProjectContext.invalidate();
-      void utils.timeline.getBudgetStatus.invalidate();
-    },
+    onSuccess: invalidateTimeline,
   });
 
   const push = useCallback((snapshot: AllocationMovedSnapshot) => {
@@ -58,13 +49,6 @@ export function useAllocationHistory() {
     setCanRedo(false);
   }, [maxHistory]);
 
-  const invalidateAll = useCallback(() => {
-    void utils.timeline.getEntries.invalidate();
-    void utils.timeline.getEntriesView.invalidate();
-    void utils.timeline.getProjectContext.invalidate();
-    void utils.timeline.getBudgetStatus.invalidate();
-  }, [utils]);
-
   const undo = useCallback(async () => {
     const last = past.current[past.current.length - 1];
     if (!last) return;