Add Milestones 1 & 2: full-stack POS foundation with admin UI

- Node/Express/TypeScript API under /api/v1 with JWT auth (login, refresh, logout, /me)
- Prisma schema: vendors, users, roles, products, categories, taxes, transactions
- SQLite for local dev; Postgres via docker-compose for production
- Full CRUD routes for vendors, users, categories, taxes, products with Zod validation and RBAC
- Paginated list endpoints scoped per vendor; refresh token rotation
- React/TypeScript admin SPA (Vite): login, protected routing, sidebar layout
- Pages: Dashboard, Catalog (tabbed Products/Categories/Taxes), Users, Vendor Settings
- Shared UI: Table, Modal, FormField, Btn, PageHeader components
- Multi-stage Dockerfile; docker-compose with Postgres healthcheck
- Seed script with demo vendor and owner account
- INSTRUCTIONS.md, ROADMAP.md, .claude/launch.json for dev server config

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

server/node_modules/zod/src/v3/tests/literal.test.ts

@@ -0,0 +1,36 @@
+// @ts-ignore TS6133
+import { expect, test } from "vitest";
+
+import * as z from "zod/v3";
+
+const literalTuna = z.literal("tuna");
+const literalFortyTwo = z.literal(42);
+const literalTrue = z.literal(true);
+
+const terrificSymbol = Symbol("terrific");
+const literalTerrificSymbol = z.literal(terrificSymbol);
+
+test("passing validations", () => {
+  literalTuna.parse("tuna");
+  literalFortyTwo.parse(42);
+  literalTrue.parse(true);
+  literalTerrificSymbol.parse(terrificSymbol);
+});
+
+test("failing validations", () => {
+  expect(() => literalTuna.parse("shark")).toThrow();
+  expect(() => literalFortyTwo.parse(43)).toThrow();
+  expect(() => literalTrue.parse(false)).toThrow();
+  expect(() => literalTerrificSymbol.parse(Symbol("terrific"))).toThrow();
+});
+
+test("invalid_literal should have `received` field with data", () => {
+  const data = "shark";
+  const result = literalTuna.safeParse(data);
+  if (!result.success) {
+    const issue = result.error.issues[0];
+    if (issue.code === "invalid_literal") {
+      expect(issue.received).toBe(data);
+    }
+  }
+});