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/math-intrinsics/README.md

@@ -0,0 +1,50 @@
+# math-intrinsics <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
+
+[![github actions][actions-image]][actions-url]
+[![coverage][codecov-image]][codecov-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][npm-badge-png]][package-url]
+
+ES Math-related intrinsics and helpers, robustly cached.
+
+ - `abs`
+ - `floor`
+ - `isFinite`
+ - `isInteger`
+ - `isNaN`
+ - `isNegativeZero`
+ - `max`
+ - `min`
+ - `mod`
+ - `pow`
+ - `round`
+ - `sign`
+ - `constants/maxArrayLength`
+ - `constants/maxSafeInteger`
+ - `constants/maxValue`
+
+
+## Tests
+Simply clone the repo, `npm install`, and run `npm test`
+
+## Security
+
+Please email [@ljharb](https://github.com/ljharb) or see https://tidelift.com/security if you have a potential security vulnerability to report.
+
+[package-url]: https://npmjs.org/package/math-intrinsics
+[npm-version-svg]: https://versionbadg.es/es-shims/math-intrinsics.svg
+[deps-svg]: https://david-dm.org/es-shims/math-intrinsics.svg
+[deps-url]: https://david-dm.org/es-shims/math-intrinsics
+[dev-deps-svg]: https://david-dm.org/es-shims/math-intrinsics/dev-status.svg
+[dev-deps-url]: https://david-dm.org/es-shims/math-intrinsics#info=devDependencies
+[npm-badge-png]: https://nodei.co/npm/math-intrinsics.png?downloads=true&stars=true
+[license-image]: https://img.shields.io/npm/l/math-intrinsics.svg
+[license-url]: LICENSE
+[downloads-image]: https://img.shields.io/npm/dm/es-object.svg
+[downloads-url]: https://npm-stat.com/charts.html?package=math-intrinsics
+[codecov-image]: https://codecov.io/gh/es-shims/math-intrinsics/branch/main/graphs/badge.svg
+[codecov-url]: https://app.codecov.io/gh/es-shims/math-intrinsics/
+[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/math-intrinsics
+[actions-url]: https://github.com/es-shims/math-intrinsics/actions