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/postcss/lib/result.js

@@ -0,0 +1,42 @@
+'use strict'
+
+let Warning = require('./warning')
+
+class Result {
+  get content() {
+    return this.css
+  }
+
+  constructor(processor, root, opts) {
+    this.processor = processor
+    this.messages = []
+    this.root = root
+    this.opts = opts
+    this.css = ''
+    this.map = undefined
+  }
+
+  toString() {
+    return this.css
+  }
+
+  warn(text, opts = {}) {
+    if (!opts.plugin) {
+      if (this.lastPlugin && this.lastPlugin.postcssPlugin) {
+        opts.plugin = this.lastPlugin.postcssPlugin
+      }
+    }
+
+    let warning = new Warning(text, opts)
+    this.messages.push(warning)
+
+    return warning
+  }
+
+  warnings() {
+    return this.messages.filter(i => i.type === 'warning')
+  }
+}
+
+module.exports = Result
+Result.default = Result