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/v4/classic/compat.js

@@ -0,0 +1,27 @@
+// Zod 3 compat layer
+import * as core from "../core/index.js";
+/** @deprecated Use the raw string literal codes instead, e.g. "invalid_type". */
+export const ZodIssueCode = {
+    invalid_type: "invalid_type",
+    too_big: "too_big",
+    too_small: "too_small",
+    invalid_format: "invalid_format",
+    not_multiple_of: "not_multiple_of",
+    unrecognized_keys: "unrecognized_keys",
+    invalid_union: "invalid_union",
+    invalid_key: "invalid_key",
+    invalid_element: "invalid_element",
+    invalid_value: "invalid_value",
+    custom: "custom",
+};
+export { $brand, config } from "../core/index.js";
+/** @deprecated Use `z.config(params)` instead. */
+export function setErrorMap(map) {
+    core.config({
+        customError: map,
+    });
+}
+/** @deprecated Use `z.config()` instead. */
+export function getErrorMap() {
+    return core.config().customError;
+}