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>

apps/web/src/components/assistant/ChatPanel.tsx

@@ -263,7 +263,8 @@ export function ChatPanel({ onClose }: { onClose: () => void }) {
         if (actions) {
           for (const action of actions) {
             if (action.type === "navigate" && action.url) {
-              router.push(action.url as string & {});
+              // eslint-disable-next-line @typescript-eslint/no-explicit-any
+              router.push(action.url as any);
             } else if (action.type === "invalidate" && action.scope) {
               // Invalidate relevant tRPC queries so the UI refreshes
               for (const scope of action.scope) {