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/external.js

@@ -0,0 +1,18 @@
+export * as core from "../core/index.js";
+export * from "./schemas.js";
+export * from "./checks.js";
+export * from "./errors.js";
+export * from "./parse.js";
+export * from "./compat.js";
+// zod-specified
+import { config } from "../core/index.js";
+import en from "../locales/en.js";
+config(en());
+export { globalRegistry, registry, config, function, $output, $input, $brand, clone, regexes, treeifyError, prettifyError, formatError, flattenError, toJSONSchema, TimePrecision, NEVER, } from "../core/index.js";
+export * as locales from "../locales/index.js";
+// iso
+// must be exported from top-level
+// https://github.com/colinhacks/zod/issues/4491
+export { ZodISODateTime, ZodISODate, ZodISOTime, ZodISODuration } from "./iso.js";
+export * as iso from "./iso.js";
+export * as coerce from "./coerce.js";