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>

client/node_modules/caniuse-lite/dist/unpacker/region.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const browsers = require('./browsers').browsers
+
+function unpackRegion(packed) {
+  return Object.keys(packed).reduce((list, browser) => {
+    let data = packed[browser]
+    list[browsers[browser]] = Object.keys(data).reduce((memo, key) => {
+      let stats = data[key]
+      if (key === '_') {
+        stats.split(' ').forEach(version => (memo[version] = null))
+      } else {
+        memo[key] = stats
+      }
+      return memo
+    }, {})
+    return list
+  }, {})
+}
+
+module.exports = unpackRegion
+module.exports.default = unpackRegion