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/feature.js

@@ -0,0 +1,52 @@
+'use strict'
+
+const statuses = require('../lib/statuses')
+const supported = require('../lib/supported')
+const browsers = require('./browsers').browsers
+const versions = require('./browserVersions').browserVersions
+
+const MATH2LOG = Math.log(2)
+
+function unpackSupport(cipher) {
+  // bit flags
+  let stats = Object.keys(supported).reduce((list, support) => {
+    if (cipher & supported[support]) list.push(support)
+    return list
+  }, [])
+
+  // notes
+  let notes = cipher >> 7
+  let notesArray = []
+  while (notes) {
+    let note = Math.floor(Math.log(notes) / MATH2LOG) + 1
+    notesArray.unshift(`#${note}`)
+    notes -= Math.pow(2, note - 1)
+  }
+
+  return stats.concat(notesArray).join(' ')
+}
+
+function unpackFeature(packed) {
+  let unpacked = {
+    status: statuses[packed.B],
+    title: packed.C,
+    shown: packed.D
+  }
+  unpacked.stats = Object.keys(packed.A).reduce((browserStats, key) => {
+    let browser = packed.A[key]
+    browserStats[browsers[key]] = Object.keys(browser).reduce(
+      (stats, support) => {
+        let packedVersions = browser[support].split(' ')
+        let unpacked2 = unpackSupport(support)
+        packedVersions.forEach(v => (stats[versions[v]] = unpacked2))
+        return stats
+      },
+      {}
+    )
+    return browserStats
+  }, {})
+  return unpacked
+}
+
+module.exports = unpackFeature
+module.exports.default = unpackFeature