fix(types): flatten tRPC Zod schema types to resolve TS2589 inference depth errors

Cast Zod schemas with .refine()/.superRefine() to z.ZodType<InferredType> at the
procedure level. This short-circuits TypeScript's deep type recursion through
tRPC's middleware chain, eliminating 4 of 5 @ts-expect-error TS2589 suppressions
in web components (VacationModal, ProjectModal, UsersClient, CountriesClient).

Applied same pattern to allocation, timeline, staffing, dashboard, project, and
resource query/mutation procedures to reduce client-side type depth.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/api/src/router/system-role-config.ts

@@ -1,3 +1,4 @@
+import type { z } from "zod";
 import { adminProcedure, createTRPCRouter } from "../trpc.js";
 import {
   listSystemRoleConfigs,
@@ -11,6 +12,10 @@ export const systemRoleConfigRouter = createTRPCRouter({
 
   /** Update a role's default permissions, label, description, and color */
   update: adminProcedure
-    .input(systemRoleConfigUpdateInputSchema)
+    .input(
+      systemRoleConfigUpdateInputSchema as z.ZodType<
+        z.infer<typeof systemRoleConfigUpdateInputSchema>
+      >,
+    )
     .mutation(({ ctx, input }) => updateSystemRoleConfig(ctx, input)),
 });