refactor: complete v2 refactoring plan (Phases 1-5)

Phase 1 — Quick Wins: centralize formatMoney/formatCents, extract
findUniqueOrThrow helper (19 routers), shared Prisma select constants,
useInvalidatePlanningViews hook, status badge consolidation, composite
DB indexes.

Phase 2 — Timeline Split: extract TimelineContext, TimelineResourcePanel,
TimelineProjectPanel; split 28-dep useMemo into 3 focused memos.
TimelineView.tsx reduced from 1,903 to 538 lines.

Phase 3 — Query Performance: server-side filtering for getEntriesView,
remove availability from timeline resource select, SSE event debouncing
(50ms batch window).

Phase 4 — Estimate Workspace: extract 7 tab components and 3 editor
components. EstimateWorkspaceClient 1,298→306 lines,
EstimateWorkspaceDraftEditor 1,205→581 lines.

Phase 5 — Package Cleanup: split commit-dispo-import-batch (1,112→573
lines), extract shared pagination helper with 11 tests.

All tests pass: 209 API, 254 engine, 67 application.

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

packages/api/src/router/blueprint-validation.ts

@@ -1,6 +1,7 @@
 import { validateCustomFields } from "@planarchy/engine";
 import { BlueprintTarget, type BlueprintFieldDefinition } from "@planarchy/shared";
 import { TRPCError } from "@trpc/server";
+import { findUniqueOrThrow } from "../db/helpers.js";
 
 interface BlueprintLookup {
   blueprint: {
@@ -26,14 +27,13 @@ export async function assertBlueprintDynamicFields({
 }: AssertBlueprintDynamicFieldsInput): Promise<void> {
   if (!blueprintId) return;
 
-  const blueprint = await db.blueprint.findUnique({
-    where: { id: blueprintId },
-    select: { fieldDefs: true, target: true },
-  });
-
-  if (!blueprint) {
-    throw new TRPCError({ code: "NOT_FOUND", message: "Blueprint not found" });
-  }
+  const blueprint = await findUniqueOrThrow(
+    db.blueprint.findUnique({
+      where: { id: blueprintId },
+      select: { fieldDefs: true, target: true },
+    }),
+    "Blueprint",
+  );
 
   if (blueprint.target !== target) {
     throw new TRPCError({