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/semver/functions/cmp.js

@@ -0,0 +1,54 @@
+'use strict'
+
+const eq = require('./eq')
+const neq = require('./neq')
+const gt = require('./gt')
+const gte = require('./gte')
+const lt = require('./lt')
+const lte = require('./lte')
+
+const cmp = (a, op, b, loose) => {
+  switch (op) {
+    case '===':
+      if (typeof a === 'object') {
+        a = a.version
+      }
+      if (typeof b === 'object') {
+        b = b.version
+      }
+      return a === b
+
+    case '!==':
+      if (typeof a === 'object') {
+        a = a.version
+      }
+      if (typeof b === 'object') {
+        b = b.version
+      }
+      return a !== b
+
+    case '':
+    case '=':
+    case '==':
+      return eq(a, b, loose)
+
+    case '!=':
+      return neq(a, b, loose)
+
+    case '>':
+      return gt(a, b, loose)
+
+    case '>=':
+      return gte(a, b, loose)
+
+    case '<':
+      return lt(a, b, loose)
+
+    case '<=':
+      return lte(a, b, loose)
+
+    default:
+      throw new TypeError(`Invalid operator: ${op}`)
+  }
+}
+module.exports = cmp