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/tsx/dist/repl.cjs

@@ -0,0 +1,3 @@
+"use strict";var c=Object.defineProperty;var s=(e,r)=>c(e,"name",{value:r,configurable:!0});var l=require("node:repl"),u=require("./package-Dxt5kIHw.cjs"),q=require("./index-gckBtVBf.cjs");require("node:url"),require("esbuild"),require("node:crypto"),require("node:fs"),require("node:path"),require("node:os"),require("./temporary-directory-B83uKxJF.cjs"),console.log(`Welcome to tsx v${u.version} (Node.js ${process.version}).
+Type ".help" for more information.`);const t=l.start(),{eval:p}=t,v=s(async function(e,r,o,i){const a=await q.transform(e,o,{loader:"ts",tsconfigRaw:{compilerOptions:{preserveValueImports:!0}},define:{require:"global.require"}}).catch(n=>(console.log(n.message),{code:`
+`}));return p.call(this,a.code,r,o,i)},"preEval");t.eval=v;